/* Target dependent code for CRIS, for GDB, the GNU debugger.
- Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
+
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+ Free Software Foundation, Inc.
+
Contributed by Axis Communications AB.
Written by Hendrik Ruijter, Stefan Andersson, and Orjan Friberg.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "frame.h"
+#include "frame-unwind.h"
+#include "frame-base.h"
+#include "trad-frame.h"
+#include "dwarf2-frame.h"
#include "symtab.h"
#include "inferior.h"
#include "gdbtypes.h"
#include "opcode/cris.h"
#include "arch-utils.h"
#include "regcache.h"
+#include "gdb_assert.h"
/* To get entry_point_address. */
-#include "symfile.h"
+#include "objfiles.h"
-#include "solib.h" /* Support for shared libraries. */
-#include "solib-svr4.h" /* For struct link_map_offsets. */
+#include "solib.h" /* Support for shared libraries. */
+#include "solib-svr4.h"
#include "gdb_string.h"
-
+#include "dis-asm.h"
enum cris_num_regs
{
NUM_GENREGS = 16,
/* There are 16 special registers. */
- NUM_SPECREGS = 16
+ NUM_SPECREGS = 16,
+
+ /* CRISv32 has a pseudo PC register, not noted here. */
+
+ /* CRISv32 has 16 support registers. */
+ NUM_SUPPREGS = 16
};
/* Register numbers of various important registers.
- DEPRECATED_FP_REGNUM Contains address of executing stack frame.
+ CRIS_FP_REGNUM Contains address of executing stack frame.
STR_REGNUM Contains the address of structure return values.
RET_REGNUM Contains the return value when shorter than or equal to 32 bits
ARG1_REGNUM Contains the first parameter to a function.
SRP_REGNUM Subroutine return pointer register.
BRP_REGNUM Breakpoint return pointer register. */
-/* DEPRECATED_FP_REGNUM = 8, SP_REGNUM = 14, and PC_REGNUM = 15 have
- been incorporated into the multi-arch framework. */
-
enum cris_regnums
{
/* Enums with respect to the general registers, valid for all
- CRIS versions. */
+ CRIS versions. The frame pointer is always in R8. */
+ CRIS_FP_REGNUM = 8,
+ /* ABI related registers. */
STR_REGNUM = 9,
RET_REGNUM = 10,
ARG1_REGNUM = 10,
ARG3_REGNUM = 12,
ARG4_REGNUM = 13,
- /* Enums with respect to the special registers, some of which may not be
- applicable to all CRIS versions. */
- P0_REGNUM = 16,
+ /* Registers which happen to be common. */
VR_REGNUM = 17,
- P2_REGNUM = 18,
- P3_REGNUM = 19,
+ MOF_REGNUM = 23,
+ SRP_REGNUM = 27,
+
+ /* CRISv10 et. al. specific registers. */
+ P0_REGNUM = 16,
P4_REGNUM = 20,
CCR_REGNUM = 21,
- MOF_REGNUM = 23,
P8_REGNUM = 24,
IBR_REGNUM = 25,
IRP_REGNUM = 26,
- SRP_REGNUM = 27,
BAR_REGNUM = 28,
DCCR_REGNUM = 29,
BRP_REGNUM = 30,
- USP_REGNUM = 31
+ USP_REGNUM = 31,
+
+ /* CRISv32 specific registers. */
+ ACR_REGNUM = 15,
+ BZ_REGNUM = 16,
+ PID_REGNUM = 18,
+ SRS_REGNUM = 19,
+ WZ_REGNUM = 20,
+ EXS_REGNUM = 21,
+ EDA_REGNUM = 22,
+ DZ_REGNUM = 24,
+ EBP_REGNUM = 25,
+ ERP_REGNUM = 26,
+ NRP_REGNUM = 28,
+ CCS_REGNUM = 29,
+ CRISV32USP_REGNUM = 30, /* Shares name but not number with CRISv10. */
+ SPC_REGNUM = 31,
+ CRISV32PC_REGNUM = 32, /* Shares name but not number with CRISv10. */
+
+ S0_REGNUM = 33,
+ S1_REGNUM = 34,
+ S2_REGNUM = 35,
+ S3_REGNUM = 36,
+ S4_REGNUM = 37,
+ S5_REGNUM = 38,
+ S6_REGNUM = 39,
+ S7_REGNUM = 40,
+ S8_REGNUM = 41,
+ S9_REGNUM = 42,
+ S10_REGNUM = 43,
+ S11_REGNUM = 44,
+ S12_REGNUM = 45,
+ S13_REGNUM = 46,
+ S14_REGNUM = 47,
+ S15_REGNUM = 48,
};
extern const struct cris_spec_reg cris_spec_regs[];
/* CRIS version, set via the user command 'set cris-version'. Affects
- register names and sizes.*/
+ register names and sizes. */
static int usr_cmd_cris_version;
/* Indicates whether to trust the above variable. */
static int usr_cmd_cris_version_valid = 0;
-/* CRIS mode, set via the user command 'set cris-mode'. Affects availability
- of some registers. */
-static const char *usr_cmd_cris_mode;
-
-/* Indicates whether to trust the above variable. */
-static int usr_cmd_cris_mode_valid = 0;
-
-static const char CRIS_MODE_USER[] = "CRIS_MODE_USER";
-static const char CRIS_MODE_SUPERVISOR[] = "CRIS_MODE_SUPERVISOR";
-static const char *cris_mode_enums[] =
-{
- CRIS_MODE_USER,
- CRIS_MODE_SUPERVISOR,
+static const char cris_mode_normal[] = "normal";
+static const char cris_mode_guru[] = "guru";
+static const char *cris_modes[] = {
+ cris_mode_normal,
+ cris_mode_guru,
0
};
-/* CRIS ABI, set via the user command 'set cris-abi'.
- There are two flavours:
- 1. Original ABI with 32-bit doubles, where arguments <= 4 bytes are
- passed by value.
- 2. New ABI with 64-bit doubles, where arguments <= 8 bytes are passed by
- value. */
-static const char *usr_cmd_cris_abi;
-
-/* Indicates whether to trust the above variable. */
-static int usr_cmd_cris_abi_valid = 0;
+/* CRIS mode, set via the user command 'set cris-mode'. Affects
+ type of break instruction among other things. */
+static const char *usr_cmd_cris_mode = cris_mode_normal;
-/* These variables are strings instead of enums to make them usable as
- parameters to add_set_enum_cmd. */
-static const char CRIS_ABI_ORIGINAL[] = "CRIS_ABI_ORIGINAL";
-static const char CRIS_ABI_V2[] = "CRIS_ABI_V2";
-static const char CRIS_ABI_SYMBOL[] = ".$CRIS_ABI_V2";
-static const char *cris_abi_enums[] =
-{
- CRIS_ABI_ORIGINAL,
- CRIS_ABI_V2,
- 0
-};
+/* Whether to make use of Dwarf-2 CFI (default on). */
+static int usr_cmd_cris_dwarf2_cfi = 1;
/* CRIS architecture specific information. */
struct gdbarch_tdep
{
int cris_version;
const char *cris_mode;
- const char *cris_abi;
+ int cris_dwarf2_cfi;
};
/* Functions for accessing target dependent data. */
return (gdbarch_tdep (current_gdbarch)->cris_mode);
}
-static const char *
-cris_abi (void)
+/* Sigtramp identification code copied from i386-linux-tdep.c. */
+
+#define SIGTRAMP_INSN0 0x9c5f /* movu.w 0xXX, $r9 */
+#define SIGTRAMP_OFFSET0 0
+#define SIGTRAMP_INSN1 0xe93d /* break 13 */
+#define SIGTRAMP_OFFSET1 4
+
+static const unsigned short sigtramp_code[] =
+{
+ SIGTRAMP_INSN0, 0x0077, /* movu.w $0x77, $r9 */
+ SIGTRAMP_INSN1 /* break 13 */
+};
+
+#define SIGTRAMP_LEN (sizeof sigtramp_code)
+
+/* Note: same length as normal sigtramp code. */
+
+static const unsigned short rt_sigtramp_code[] =
+{
+ SIGTRAMP_INSN0, 0x00ad, /* movu.w $0xad, $r9 */
+ SIGTRAMP_INSN1 /* break 13 */
+};
+
+/* If PC is in a sigtramp routine, return the address of the start of
+ the routine. Otherwise, return 0. */
+
+static CORE_ADDR
+cris_sigtramp_start (struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ gdb_byte buf[SIGTRAMP_LEN];
+
+ if (!safe_frame_unwind_memory (next_frame, pc, buf, SIGTRAMP_LEN))
+ return 0;
+
+ if (((buf[1] << 8) + buf[0]) != SIGTRAMP_INSN0)
+ {
+ if (((buf[1] << 8) + buf[0]) != SIGTRAMP_INSN1)
+ return 0;
+
+ pc -= SIGTRAMP_OFFSET1;
+ if (!safe_frame_unwind_memory (next_frame, pc, buf, SIGTRAMP_LEN))
+ return 0;
+ }
+
+ if (memcmp (buf, sigtramp_code, SIGTRAMP_LEN) != 0)
+ return 0;
+
+ return pc;
+}
+
+/* If PC is in a RT sigtramp routine, return the address of the start of
+ the routine. Otherwise, return 0. */
+
+static CORE_ADDR
+cris_rt_sigtramp_start (struct frame_info *next_frame)
{
- return (gdbarch_tdep (current_gdbarch)->cris_abi);
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ gdb_byte buf[SIGTRAMP_LEN];
+
+ if (!safe_frame_unwind_memory (next_frame, pc, buf, SIGTRAMP_LEN))
+ return 0;
+
+ if (((buf[1] << 8) + buf[0]) != SIGTRAMP_INSN0)
+ {
+ if (((buf[1] << 8) + buf[0]) != SIGTRAMP_INSN1)
+ return 0;
+
+ pc -= SIGTRAMP_OFFSET1;
+ if (!safe_frame_unwind_memory (next_frame, pc, buf, SIGTRAMP_LEN))
+ return 0;
+ }
+
+ if (memcmp (buf, rt_sigtramp_code, SIGTRAMP_LEN) != 0)
+ return 0;
+
+ return pc;
}
-/* For saving call-clobbered contents in R9 when returning structs. */
-static CORE_ADDR struct_return_address;
+/* Assuming NEXT_FRAME is a frame following a GNU/Linux sigtramp
+ routine, return the address of the associated sigcontext structure. */
+
+static CORE_ADDR
+cris_sigcontext_addr (struct frame_info *next_frame)
+{
+ CORE_ADDR pc;
+ CORE_ADDR sp;
+ char buf[4];
+
+ frame_unwind_register (next_frame, SP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 4);
+
+ /* Look for normal sigtramp frame first. */
+ pc = cris_sigtramp_start (next_frame);
+ if (pc)
+ {
+ /* struct signal_frame (arch/cris/kernel/signal.c) contains
+ struct sigcontext as its first member, meaning the SP points to
+ it already. */
+ return sp;
+ }
+
+ pc = cris_rt_sigtramp_start (next_frame);
+ if (pc)
+ {
+ /* struct rt_signal_frame (arch/cris/kernel/signal.c) contains
+ a struct ucontext, which in turn contains a struct sigcontext.
+ Magic digging:
+ 4 + 4 + 128 to struct ucontext, then
+ 4 + 4 + 12 to struct sigcontext. */
+ return (sp + 156);
+ }
+
+ error (_("Couldn't recognize signal trampoline."));
+ return 0;
+}
-struct frame_extra_info
+struct cris_unwind_cache
{
+ /* The previous frame's inner most stack address. Used as this
+ frame ID's stack_addr. */
+ CORE_ADDR prev_sp;
+ /* The frame's base, optionally used by the high-level debug info. */
+ CORE_ADDR base;
+ int size;
+ /* How far the SP and r8 (FP) have been offset from the start of
+ the stack frame (as defined by the previous frame's stack
+ pointer). */
+ LONGEST sp_offset;
+ LONGEST r8_offset;
+ int uses_frame;
+
+ /* From old frame_extra_info struct. */
CORE_ADDR return_pc;
int leaf_function;
+
+ /* Table indicating the location of each and every register. */
+ struct trad_frame_saved_reg *saved_regs;
+};
+
+static struct cris_unwind_cache *
+cris_sigtramp_frame_unwind_cache (struct frame_info *next_frame,
+ void **this_cache)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ struct cris_unwind_cache *info;
+ CORE_ADDR pc;
+ CORE_ADDR sp;
+ CORE_ADDR addr;
+ char buf[4];
+ int i;
+
+ if ((*this_cache))
+ return (*this_cache);
+
+ info = FRAME_OBSTACK_ZALLOC (struct cris_unwind_cache);
+ (*this_cache) = info;
+ info->saved_regs = trad_frame_alloc_saved_regs (next_frame);
+
+ /* Zero all fields. */
+ info->prev_sp = 0;
+ info->base = 0;
+ info->size = 0;
+ info->sp_offset = 0;
+ info->r8_offset = 0;
+ info->uses_frame = 0;
+ info->return_pc = 0;
+ info->leaf_function = 0;
+
+ frame_unwind_register (next_frame, SP_REGNUM, buf);
+ info->base = extract_unsigned_integer (buf, 4);
+
+ addr = cris_sigcontext_addr (next_frame);
+
+ /* Layout of the sigcontext struct:
+ struct sigcontext {
+ struct pt_regs regs;
+ unsigned long oldmask;
+ unsigned long usp;
+ }; */
+
+ if (tdep->cris_version == 10)
+ {
+ /* R0 to R13 are stored in reverse order at offset (2 * 4) in
+ struct pt_regs. */
+ for (i = 0; i <= 13; i++)
+ info->saved_regs[i].addr = addr + ((15 - i) * 4);
+
+ info->saved_regs[MOF_REGNUM].addr = addr + (16 * 4);
+ info->saved_regs[DCCR_REGNUM].addr = addr + (17 * 4);
+ info->saved_regs[SRP_REGNUM].addr = addr + (18 * 4);
+ /* Note: IRP is off by 2 at this point. There's no point in correcting
+ it though since that will mean that the backtrace will show a PC
+ different from what is shown when stopped. */
+ info->saved_regs[IRP_REGNUM].addr = addr + (19 * 4);
+ info->saved_regs[PC_REGNUM] = info->saved_regs[IRP_REGNUM];
+ info->saved_regs[SP_REGNUM].addr = addr + (24 * 4);
+ }
+ else
+ {
+ /* CRISv32. */
+ /* R0 to R13 are stored in order at offset (1 * 4) in
+ struct pt_regs. */
+ for (i = 0; i <= 13; i++)
+ info->saved_regs[i].addr = addr + ((i + 1) * 4);
+
+ info->saved_regs[ACR_REGNUM].addr = addr + (15 * 4);
+ info->saved_regs[SRS_REGNUM].addr = addr + (16 * 4);
+ info->saved_regs[MOF_REGNUM].addr = addr + (17 * 4);
+ info->saved_regs[SPC_REGNUM].addr = addr + (18 * 4);
+ info->saved_regs[CCS_REGNUM].addr = addr + (19 * 4);
+ info->saved_regs[SRP_REGNUM].addr = addr + (20 * 4);
+ info->saved_regs[ERP_REGNUM].addr = addr + (21 * 4);
+ info->saved_regs[EXS_REGNUM].addr = addr + (22 * 4);
+ info->saved_regs[EDA_REGNUM].addr = addr + (23 * 4);
+
+ /* FIXME: If ERP is in a delay slot at this point then the PC will
+ be wrong at this point. This problem manifests itself in the
+ sigaltstack.exp test case, which occasionally generates FAILs when
+ the signal is received while in a delay slot.
+
+ This could be solved by a couple of read_memory_unsigned_integer and a
+ trad_frame_set_value. */
+ info->saved_regs[PC_REGNUM] = info->saved_regs[ERP_REGNUM];
+
+ info->saved_regs[SP_REGNUM].addr = addr + (25 * 4);
+ }
+
+ return info;
+}
+
+static void
+cris_sigtramp_frame_this_id (struct frame_info *next_frame, void **this_cache,
+ struct frame_id *this_id)
+{
+ struct cris_unwind_cache *cache =
+ cris_sigtramp_frame_unwind_cache (next_frame, this_cache);
+ (*this_id) = frame_id_build (cache->base, frame_pc_unwind (next_frame));
+}
+
+/* Forward declaration. */
+
+static void cris_frame_prev_register (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, gdb_byte *bufferp);
+static void
+cris_sigtramp_frame_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, gdb_byte *valuep)
+{
+ /* Make sure we've initialized the cache. */
+ cris_sigtramp_frame_unwind_cache (next_frame, this_cache);
+ cris_frame_prev_register (next_frame, this_cache, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
+}
+
+static const struct frame_unwind cris_sigtramp_frame_unwind =
+{
+ SIGTRAMP_FRAME,
+ cris_sigtramp_frame_this_id,
+ cris_sigtramp_frame_prev_register
};
+static const struct frame_unwind *
+cris_sigtramp_frame_sniffer (struct frame_info *next_frame)
+{
+ if (cris_sigtramp_start (next_frame)
+ || cris_rt_sigtramp_start (next_frame))
+ return &cris_sigtramp_frame_unwind;
+
+ return NULL;
+}
+
+int
+crisv32_single_step_through_delay (struct gdbarch *gdbarch,
+ struct frame_info *this_frame)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+ ULONGEST erp;
+ int ret = 0;
+ char buf[4];
+
+ if (cris_mode () == cris_mode_guru)
+ {
+ frame_unwind_register (this_frame, NRP_REGNUM, buf);
+ }
+ else
+ {
+ frame_unwind_register (this_frame, ERP_REGNUM, buf);
+ }
+
+ erp = extract_unsigned_integer (buf, 4);
+
+ if (erp & 0x1)
+ {
+ /* In delay slot - check if there's a breakpoint at the preceding
+ instruction. */
+ if (breakpoint_here_p (erp & ~0x1))
+ ret = 1;
+ }
+ return ret;
+}
+
+/* Hardware watchpoint support. */
+
+/* We support 6 hardware data watchpoints, but cannot trigger on execute
+ (any combination of read/write is fine). */
+
+int
+cris_can_use_hardware_watchpoint (int type, int count, int other)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
+
+ /* No bookkeeping is done here; it is handled by the remote debug agent. */
+
+ if (tdep->cris_version != 32)
+ return 0;
+ else
+ /* CRISv32: Six data watchpoints, one for instructions. */
+ return (((type == bp_read_watchpoint || type == bp_access_watchpoint
+ || type == bp_hardware_watchpoint) && count <= 6)
+ || (type == bp_hardware_breakpoint && count <= 1));
+}
+
+/* The CRISv32 hardware data watchpoints work by specifying ranges,
+ which have no alignment or length restrictions. */
+
+int
+cris_region_ok_for_watchpoint (CORE_ADDR addr, int len)
+{
+ return 1;
+}
+
+/* If the inferior has some watchpoint that triggered, return the
+ address associated with that watchpoint. Otherwise, return
+ zero. */
+
+CORE_ADDR
+cris_stopped_data_address (void)
+{
+ CORE_ADDR eda;
+ eda = read_register (EDA_REGNUM);
+ return eda;
+}
+
/* The instruction environment needed to find single-step breakpoints. */
+
typedef
struct instruction_environment
{
int disable_interrupt;
} inst_env_type;
-/* Save old breakpoints in order to restore the state before a single_step.
- At most, two breakpoints will have to be remembered. */
-typedef
-char binsn_quantum[BREAKPOINT_MAX];
-static binsn_quantum break_mem[2];
-static CORE_ADDR next_pc = 0;
-static CORE_ADDR branch_target_address = 0;
-static unsigned char branch_break_inserted = 0;
-
/* Machine-dependencies in CRIS for opcodes. */
/* Instruction sizes. */
/* Additional functions in order to handle opcodes. */
-static int
-cris_get_wide_opcode (unsigned short insn)
-{
- return ((insn & 0x03E0) >> 5);
-}
-
-static int
-cris_get_short_size (unsigned short insn)
-{
- return ((insn & 0x0010) >> 4);
-}
-
static int
cris_get_quick_value (unsigned short insn)
{
return (value & 0x3F);
}
-static int
-cris_get_asr_quick_shift_steps (unsigned short insn)
-{
- return (insn & 0x1F);
-}
-
static int
cris_get_clear_size (unsigned short insn)
{
inst_env. */
static void cris_gdb_func (enum cris_op_type, unsigned short, inst_env_type *);
-static CORE_ADDR cris_skip_prologue_main (CORE_ADDR pc, int frameless_p);
-
static struct gdbarch *cris_gdbarch_init (struct gdbarch_info,
struct gdbarch_list *);
-static int cris_delayed_get_disassembler (bfd_vma, disassemble_info *);
-
static void cris_dump_tdep (struct gdbarch *, struct ui_file *);
-static void cris_version_update (char *ignore_args, int from_tty,
- struct cmd_list_element *c);
+static void set_cris_version (char *ignore_args, int from_tty,
+ struct cmd_list_element *c);
-static void cris_mode_update (char *ignore_args, int from_tty,
- struct cmd_list_element *c);
+static void set_cris_mode (char *ignore_args, int from_tty,
+ struct cmd_list_element *c);
-static void cris_abi_update (char *ignore_args, int from_tty,
- struct cmd_list_element *c);
+static void set_cris_dwarf2_cfi (char *ignore_args, int from_tty,
+ struct cmd_list_element *c);
-static CORE_ADDR bfd_lookup_symbol (bfd *, const char *);
+static CORE_ADDR cris_scan_prologue (CORE_ADDR pc,
+ struct frame_info *next_frame,
+ struct cris_unwind_cache *info);
-/* Frames information. The definition of the struct frame_info is
-
- CORE_ADDR frame
- CORE_ADDR pc
- enum frame_type type;
- CORE_ADDR return_pc
- int leaf_function
+static CORE_ADDR crisv32_scan_prologue (CORE_ADDR pc,
+ struct frame_info *next_frame,
+ struct cris_unwind_cache *info);
- If the compilation option -fno-omit-frame-pointer is present the
- variable frame will be set to the content of R8 which is the frame
- pointer register.
+static CORE_ADDR cris_unwind_pc (struct gdbarch *gdbarch,
+ struct frame_info *next_frame);
- The variable pc contains the address where execution is performed
- in the present frame. The innermost frame contains the current content
- of the register PC. All other frames contain the content of the
- register PC in the next frame.
+static CORE_ADDR cris_unwind_sp (struct gdbarch *gdbarch,
+ struct frame_info *next_frame);
- The variable `type' indicates the frame's type: normal, SIGTRAMP
- (associated with a signal handler), dummy (associated with a dummy
- frame).
+/* When arguments must be pushed onto the stack, they go on in reverse
+ order. The below implements a FILO (stack) to do this.
+ Copied from d10v-tdep.c. */
- The variable return_pc contains the address where execution should be
- resumed when the present frame has finished, the return address.
+struct stack_item
+{
+ int len;
+ struct stack_item *prev;
+ void *data;
+};
- The variable leaf_function is 1 if the return address is in the register
- SRP, and 0 if it is on the stack.
+static struct stack_item *
+push_stack_item (struct stack_item *prev, void *contents, int len)
+{
+ struct stack_item *si;
+ si = xmalloc (sizeof (struct stack_item));
+ si->data = xmalloc (len);
+ si->len = len;
+ si->prev = prev;
+ memcpy (si->data, contents, len);
+ return si;
+}
- Prologue instructions C-code.
- The prologue may consist of (-fno-omit-frame-pointer)
- 1) 2)
- push srp
- push r8 push r8
- move.d sp,r8 move.d sp,r8
- subq X,sp subq X,sp
- movem rY,[sp] movem rY,[sp]
- move.S rZ,[r8-U] move.S rZ,[r8-U]
+static struct stack_item *
+pop_stack_item (struct stack_item *si)
+{
+ struct stack_item *dead = si;
+ si = si->prev;
+ xfree (dead->data);
+ xfree (dead);
+ return si;
+}
- where 1 is a non-terminal function, and 2 is a leaf-function.
+/* Put here the code to store, into fi->saved_regs, the addresses of
+ the saved registers of frame described by FRAME_INFO. This
+ includes special registers such as pc and fp saved in special ways
+ in the stack frame. sp is even more special: the address we return
+ for it IS the sp for the next frame. */
- Note that this assumption is extremely brittle, and will break at the
- slightest change in GCC's prologue.
+struct cris_unwind_cache *
+cris_frame_unwind_cache (struct frame_info *next_frame,
+ void **this_prologue_cache)
+{
+ CORE_ADDR pc;
+ struct cris_unwind_cache *info;
+ int i;
- If local variables are declared or register contents are saved on stack
- the subq-instruction will be present with X as the number of bytes
- needed for storage. The reshuffle with respect to r8 may be performed
- with any size S (b, w, d) and any of the general registers Z={0..13}.
- The offset U should be representable by a signed 8-bit value in all cases.
- Thus, the prefix word is assumed to be immediate byte offset mode followed
- by another word containing the instruction.
+ if ((*this_prologue_cache))
+ return (*this_prologue_cache);
+
+ info = FRAME_OBSTACK_ZALLOC (struct cris_unwind_cache);
+ (*this_prologue_cache) = info;
+ info->saved_regs = trad_frame_alloc_saved_regs (next_frame);
+
+ /* Zero all fields. */
+ info->prev_sp = 0;
+ info->base = 0;
+ info->size = 0;
+ info->sp_offset = 0;
+ info->r8_offset = 0;
+ info->uses_frame = 0;
+ info->return_pc = 0;
+ info->leaf_function = 0;
+
+ /* Prologue analysis does the rest... */
+ if (cris_version () == 32)
+ crisv32_scan_prologue (frame_func_unwind (next_frame), next_frame, info);
+ else
+ cris_scan_prologue (frame_func_unwind (next_frame), next_frame, info);
- Degenerate cases:
- 3)
- push r8
- move.d sp,r8
- move.d r8,sp
- pop r8
+ return info;
+}
- Prologue instructions C++-code.
- Case 1) and 2) in the C-code may be followed by
+/* Given a GDB frame, determine the address of the calling function's
+ frame. This will be used to create a new GDB frame struct. */
- move.d r10,rS ; this
- move.d r11,rT ; P1
- move.d r12,rU ; P2
- move.d r13,rV ; P3
- move.S [r8+U],rZ ; P4
+static void
+cris_frame_this_id (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ struct frame_id *this_id)
+{
+ struct cris_unwind_cache *info
+ = cris_frame_unwind_cache (next_frame, this_prologue_cache);
+ CORE_ADDR base;
+ CORE_ADDR func;
+ struct frame_id id;
+
+ /* The FUNC is easy. */
+ func = frame_func_unwind (next_frame);
+
+ /* Hopefully the prologue analysis either correctly determined the
+ frame's base (which is the SP from the previous frame), or set
+ that base to "NULL". */
+ base = info->prev_sp;
+ if (base == 0)
+ return;
- if any of the call parameters are stored. The host expects these
- instructions to be executed in order to get the call parameters right. */
+ id = frame_id_build (base, func);
-/* Examine the prologue of a function. The variable ip is the address of
- the first instruction of the prologue. The variable limit is the address
- of the first instruction after the prologue. The variable fi contains the
- information in struct frame_info. The variable frameless_p controls whether
- the entire prologue is examined (0) or just enough instructions to
- determine that it is a prologue (1). */
+ (*this_id) = id;
+}
-CORE_ADDR
-cris_examine (CORE_ADDR ip, CORE_ADDR limit, struct frame_info *fi,
- int frameless_p)
+static void
+cris_frame_prev_register (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, gdb_byte *bufferp)
{
- /* Present instruction. */
- unsigned short insn;
-
- /* Next instruction, lookahead. */
- unsigned short insn_next;
- int regno;
+ struct cris_unwind_cache *info
+ = cris_frame_unwind_cache (next_frame, this_prologue_cache);
+ trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, bufferp);
+}
- /* Is there a push fp? */
- int have_fp;
+/* Assuming NEXT_FRAME->prev is a dummy, return the frame ID of that
+ dummy frame. The frame ID's base needs to match the TOS value
+ saved by save_dummy_frame_tos(), and the PC match the dummy frame's
+ breakpoint. */
- /* Number of byte on stack used for local variables and movem. */
- int val;
+static struct frame_id
+cris_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ return frame_id_build (cris_unwind_sp (gdbarch, next_frame),
+ frame_pc_unwind (next_frame));
+}
- /* Highest register number in a movem. */
- int regsave;
+static CORE_ADDR
+cris_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
+{
+ /* Align to the size of an instruction (so that they can safely be
+ pushed onto the stack). */
+ return sp & ~3;
+}
- /* move.d r<source_register>,rS */
+static CORE_ADDR
+cris_push_dummy_code (struct gdbarch *gdbarch,
+ CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc,
+ struct value **args, int nargs,
+ struct type *value_type,
+ CORE_ADDR *real_pc, CORE_ADDR *bp_addr)
+{
+ /* Allocate space sufficient for a breakpoint. */
+ sp = (sp - 4) & ~3;
+ /* Store the address of that breakpoint */
+ *bp_addr = sp;
+ /* CRIS always starts the call at the callee's entry point. */
+ *real_pc = funaddr;
+ return sp;
+}
+
+static CORE_ADDR
+cris_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
+ struct regcache *regcache, CORE_ADDR bp_addr,
+ int nargs, struct value **args, CORE_ADDR sp,
+ int struct_return, CORE_ADDR struct_addr)
+{
+ int stack_alloc;
+ int stack_offset;
+ int argreg;
+ int argnum;
+
+ CORE_ADDR regval;
+
+ /* The function's arguments and memory allocated by gdb for the arguments to
+ point at reside in separate areas on the stack.
+ Both frame pointers grow toward higher addresses. */
+ CORE_ADDR fp_arg;
+ CORE_ADDR fp_mem;
+
+ struct stack_item *si = NULL;
+
+ /* Push the return address. */
+ regcache_cooked_write_unsigned (regcache, SRP_REGNUM, bp_addr);
+
+ /* Are we returning a value using a structure return or a normal value
+ return? struct_addr is the address of the reserved space for the return
+ structure to be written on the stack. */
+ if (struct_return)
+ {
+ regcache_cooked_write_unsigned (regcache, STR_REGNUM, struct_addr);
+ }
+
+ /* Now load as many as possible of the first arguments into registers,
+ and push the rest onto the stack. */
+ argreg = ARG1_REGNUM;
+ stack_offset = 0;
+
+ for (argnum = 0; argnum < nargs; argnum++)
+ {
+ int len;
+ char *val;
+ int reg_demand;
+ int i;
+
+ len = TYPE_LENGTH (value_type (args[argnum]));
+ val = (char *) value_contents (args[argnum]);
+
+ /* How may registers worth of storage do we need for this argument? */
+ reg_demand = (len / 4) + (len % 4 != 0 ? 1 : 0);
+
+ if (len <= (2 * 4) && (argreg + reg_demand - 1 <= ARG4_REGNUM))
+ {
+ /* Data passed by value. Fits in available register(s). */
+ for (i = 0; i < reg_demand; i++)
+ {
+ regcache_cooked_write_unsigned (regcache, argreg,
+ *(unsigned long *) val);
+ argreg++;
+ val += 4;
+ }
+ }
+ else if (len <= (2 * 4) && argreg <= ARG4_REGNUM)
+ {
+ /* Data passed by value. Does not fit in available register(s).
+ Use the register(s) first, then the stack. */
+ for (i = 0; i < reg_demand; i++)
+ {
+ if (argreg <= ARG4_REGNUM)
+ {
+ regcache_cooked_write_unsigned (regcache, argreg,
+ *(unsigned long *) val);
+ argreg++;
+ val += 4;
+ }
+ else
+ {
+ /* Push item for later so that pushed arguments
+ come in the right order. */
+ si = push_stack_item (si, val, 4);
+ val += 4;
+ }
+ }
+ }
+ else if (len > (2 * 4))
+ {
+ /* FIXME */
+ internal_error (__FILE__, __LINE__, _("We don't do this"));
+ }
+ else
+ {
+ /* Data passed by value. No available registers. Put it on
+ the stack. */
+ si = push_stack_item (si, val, len);
+ }
+ }
+
+ while (si)
+ {
+ /* fp_arg must be word-aligned (i.e., don't += len) to match
+ the function prologue. */
+ sp = (sp - si->len) & ~3;
+ write_memory (sp, si->data, si->len);
+ si = pop_stack_item (si);
+ }
+
+ /* Finally, update the SP register. */
+ regcache_cooked_write_unsigned (regcache, SP_REGNUM, sp);
+
+ return sp;
+}
+
+static const struct frame_unwind cris_frame_unwind =
+{
+ NORMAL_FRAME,
+ cris_frame_this_id,
+ cris_frame_prev_register
+};
+
+const struct frame_unwind *
+cris_frame_sniffer (struct frame_info *next_frame)
+{
+ return &cris_frame_unwind;
+}
+
+static CORE_ADDR
+cris_frame_base_address (struct frame_info *next_frame, void **this_cache)
+{
+ struct cris_unwind_cache *info
+ = cris_frame_unwind_cache (next_frame, this_cache);
+ return info->base;
+}
+
+static const struct frame_base cris_frame_base =
+{
+ &cris_frame_unwind,
+ cris_frame_base_address,
+ cris_frame_base_address,
+ cris_frame_base_address
+};
+
+/* Frames information. The definition of the struct frame_info is
+
+ CORE_ADDR frame
+ CORE_ADDR pc
+ enum frame_type type;
+ CORE_ADDR return_pc
+ int leaf_function
+
+ If the compilation option -fno-omit-frame-pointer is present the
+ variable frame will be set to the content of R8 which is the frame
+ pointer register.
+
+ The variable pc contains the address where execution is performed
+ in the present frame. The innermost frame contains the current content
+ of the register PC. All other frames contain the content of the
+ register PC in the next frame.
+
+ The variable `type' indicates the frame's type: normal, SIGTRAMP
+ (associated with a signal handler), dummy (associated with a dummy
+ frame).
+
+ The variable return_pc contains the address where execution should be
+ resumed when the present frame has finished, the return address.
+
+ The variable leaf_function is 1 if the return address is in the register
+ SRP, and 0 if it is on the stack.
+
+ Prologue instructions C-code.
+ The prologue may consist of (-fno-omit-frame-pointer)
+ 1) 2)
+ push srp
+ push r8 push r8
+ move.d sp,r8 move.d sp,r8
+ subq X,sp subq X,sp
+ movem rY,[sp] movem rY,[sp]
+ move.S rZ,[r8-U] move.S rZ,[r8-U]
+
+ where 1 is a non-terminal function, and 2 is a leaf-function.
+
+ Note that this assumption is extremely brittle, and will break at the
+ slightest change in GCC's prologue.
+
+ If local variables are declared or register contents are saved on stack
+ the subq-instruction will be present with X as the number of bytes
+ needed for storage. The reshuffle with respect to r8 may be performed
+ with any size S (b, w, d) and any of the general registers Z={0..13}.
+ The offset U should be representable by a signed 8-bit value in all cases.
+ Thus, the prefix word is assumed to be immediate byte offset mode followed
+ by another word containing the instruction.
+
+ Degenerate cases:
+ 3)
+ push r8
+ move.d sp,r8
+ move.d r8,sp
+ pop r8
+
+ Prologue instructions C++-code.
+ Case 1) and 2) in the C-code may be followed by
+
+ move.d r10,rS ; this
+ move.d r11,rT ; P1
+ move.d r12,rU ; P2
+ move.d r13,rV ; P3
+ move.S [r8+U],rZ ; P4
+
+ if any of the call parameters are stored. The host expects these
+ instructions to be executed in order to get the call parameters right. */
+
+/* Examine the prologue of a function. The variable ip is the address of
+ the first instruction of the prologue. The variable limit is the address
+ of the first instruction after the prologue. The variable fi contains the
+ information in struct frame_info. The variable frameless_p controls whether
+ the entire prologue is examined (0) or just enough instructions to
+ determine that it is a prologue (1). */
+
+static CORE_ADDR
+cris_scan_prologue (CORE_ADDR pc, struct frame_info *next_frame,
+ struct cris_unwind_cache *info)
+{
+ /* Present instruction. */
+ unsigned short insn;
+
+ /* Next instruction, lookahead. */
+ unsigned short insn_next;
+ int regno;
+
+ /* Is there a push fp? */
+ int have_fp;
+
+ /* Number of byte on stack used for local variables and movem. */
+ int val;
+
+ /* Highest register number in a movem. */
+ int regsave;
+
+ /* move.d r<source_register>,rS */
short source_register;
- /* This frame is with respect to a leaf until a push srp is found. */
- get_frame_extra_info (fi)->leaf_function = 1;
+ /* Scan limit. */
+ int limit;
- /* This frame is without the FP until a push fp is found. */
- have_fp = 0;
+ /* This frame is with respect to a leaf until a push srp is found. */
+ if (info)
+ {
+ info->leaf_function = 1;
+ }
/* Assume nothing on stack. */
val = 0;
regsave = -1;
- /* No information about register contents so far. */
+ /* If we were called without a next_frame, that means we were called
+ from cris_skip_prologue which already tried to find the end of the
+ prologue through the symbol information. 64 instructions past current
+ pc is arbitrarily chosen, but at least it means we'll stop eventually. */
+ limit = next_frame ? frame_pc_unwind (next_frame) : pc + 64;
- /* We only want to know the end of the prologue when fi->saved_regs == 0.
- When the saved registers are allocated full information is required. */
- if (get_frame_saved_regs (fi))
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- get_frame_saved_regs (fi)[regno] = 0;
- }
-
/* Find the prologue instructions. */
- do
+ while (pc > 0 && pc < limit)
{
- insn = read_memory_unsigned_integer (ip, sizeof (short));
- ip += sizeof (short);
+ insn = read_memory_unsigned_integer (pc, 2);
+ pc += 2;
if (insn == 0xE1FC)
{
/* push <reg> 32 bit instruction */
- insn_next = read_memory_unsigned_integer (ip, sizeof (short));
- ip += sizeof (short);
+ insn_next = read_memory_unsigned_integer (pc, 2);
+ pc += 2;
regno = cris_get_operand2 (insn_next);
-
+ if (info)
+ {
+ info->sp_offset += 4;
+ }
/* This check, meant to recognize srp, used to be regno ==
(SRP_REGNUM - NUM_GENREGS), but that covers r11 also. */
if (insn_next == 0xBE7E)
{
- if (frameless_p)
- {
- return ip;
- }
- get_frame_extra_info (fi)->leaf_function = 0;
+ if (info)
+ {
+ info->leaf_function = 0;
+ }
}
- else if (regno == DEPRECATED_FP_REGNUM)
+ else if (insn_next == 0x8FEE)
{
- have_fp = 1;
+ /* push $r8 */
+ if (info)
+ {
+ info->r8_offset = info->sp_offset;
+ }
}
}
else if (insn == 0x866E)
{
/* move.d sp,r8 */
- if (frameless_p)
- {
- return ip;
- }
+ if (info)
+ {
+ info->uses_frame = 1;
+ }
continue;
}
else if (cris_get_operand2 (insn) == SP_REGNUM
&& cris_get_opcode (insn) == 0x000A)
{
/* subq <val>,sp */
- val = cris_get_quick_value (insn);
+ if (info)
+ {
+ info->sp_offset += cris_get_quick_value (insn);
+ }
}
else if (cris_get_mode (insn) == 0x0002
&& cris_get_opcode (insn) == 0x000F
&& cris_get_operand1 (insn) == SP_REGNUM)
{
/* movem r<regsave>,[sp] */
- if (frameless_p)
- {
- return ip;
- }
regsave = cris_get_operand2 (insn);
}
else if (cris_get_operand2 (insn) == SP_REGNUM
register. Used for CRIS v8 i.e. ETRAX 100 and newer if <val>
is between 64 and 128.
movem r<regsave>,[sp=sp-<val>] */
- val = -cris_get_signed_offset (insn);
- insn_next = read_memory_unsigned_integer (ip, sizeof (short));
- ip += sizeof (short);
+ if (info)
+ {
+ info->sp_offset += -cris_get_signed_offset (insn);
+ }
+ insn_next = read_memory_unsigned_integer (pc, 2);
+ pc += 2;
if (cris_get_mode (insn_next) == PREFIX_ASSIGN_MODE
&& cris_get_opcode (insn_next) == 0x000F
&& cris_get_size (insn_next) == 0x0003
&& cris_get_operand1 (insn_next) == SP_REGNUM)
{
- if (frameless_p)
- {
- return ip;
- }
regsave = cris_get_operand2 (insn_next);
}
else
{
/* The prologue ended before the limit was reached. */
- ip -= 2 * sizeof (short);
+ pc -= 4;
break;
}
}
&& cris_get_size (insn) == 0x0002)
{
/* move.d r<10..13>,r<0..15> */
- if (frameless_p)
- {
- return ip;
- }
source_register = cris_get_operand1 (insn);
/* FIXME? In the glibc solibs, the prologue might contain something
if (source_register < ARG1_REGNUM || source_register > ARG4_REGNUM)
{
/* The prologue ended before the limit was reached. */
- ip -= sizeof (short);
+ pc -= 2;
break;
}
}
- else if (cris_get_operand2 (insn) == DEPRECATED_FP_REGNUM
+ else if (cris_get_operand2 (insn) == CRIS_FP_REGNUM
/* The size is a fixed-size. */
&& ((insn & 0x0F00) >> 8) == 0x0001
/* A negative offset. */
&& (cris_get_signed_offset (insn) < 0))
{
/* move.S rZ,[r8-U] (?) */
- insn_next = read_memory_unsigned_integer (ip, sizeof (short));
- ip += sizeof (short);
+ insn_next = read_memory_unsigned_integer (pc, 2);
+ pc += 2;
regno = cris_get_operand2 (insn_next);
if ((regno >= 0 && regno < SP_REGNUM)
&& cris_get_mode (insn_next) == PREFIX_OFFSET_MODE
else
{
/* The prologue ended before the limit was reached. */
- ip -= 2 * sizeof (short);
+ pc -= 4;
break;
}
}
- else if (cris_get_operand2 (insn) == DEPRECATED_FP_REGNUM
+ else if (cris_get_operand2 (insn) == CRIS_FP_REGNUM
/* The size is a fixed-size. */
&& ((insn & 0x0F00) >> 8) == 0x0001
/* A positive offset. */
&& (cris_get_signed_offset (insn) > 0))
{
/* move.S [r8+U],rZ (?) */
- insn_next = read_memory_unsigned_integer (ip, sizeof (short));
- ip += sizeof (short);
+ insn_next = read_memory_unsigned_integer (pc, 2);
+ pc += 2;
regno = cris_get_operand2 (insn_next);
if ((regno >= 0 && regno < SP_REGNUM)
&& cris_get_mode (insn_next) == PREFIX_OFFSET_MODE
else
{
/* The prologue ended before the limit was reached. */
- ip -= 2 * sizeof (short);
+ pc -= 4;
break;
}
}
else
{
/* The prologue ended before the limit was reached. */
- ip -= sizeof (short);
+ pc -= 2;
break;
}
}
- while (ip < limit);
- /* We only want to know the end of the prologue when
- fi->saved_regs == 0. */
- if (!get_frame_saved_regs (fi))
- return ip;
+ /* We only want to know the end of the prologue when next_frame and info
+ are NULL (called from cris_skip_prologue i.e.). */
+ if (next_frame == NULL && info == NULL)
+ {
+ return pc;
+ }
+
+ info->size = info->sp_offset;
- if (have_fp)
+ /* Compute the previous frame's stack pointer (which is also the
+ frame's ID's stack address), and this frame's base pointer. */
+ if (info->uses_frame)
{
- get_frame_saved_regs (fi)[DEPRECATED_FP_REGNUM] = get_frame_base (fi);
+ ULONGEST this_base;
+ /* The SP was moved to the FP. This indicates that a new frame
+ was created. Get THIS frame's FP value by unwinding it from
+ the next frame. */
+ frame_unwind_unsigned_register (next_frame, CRIS_FP_REGNUM,
+ &this_base);
+ info->base = this_base;
+ info->saved_regs[CRIS_FP_REGNUM].addr = info->base;
+
+ /* The FP points at the last saved register. Adjust the FP back
+ to before the first saved register giving the SP. */
+ info->prev_sp = info->base + info->r8_offset;
+ }
+ else
+ {
+ ULONGEST this_base;
+ /* Assume that the FP is this frame's SP but with that pushed
+ stack space added back. */
+ frame_unwind_unsigned_register (next_frame, SP_REGNUM, &this_base);
+ info->base = this_base;
+ info->prev_sp = info->base + info->size;
+ }
- /* Calculate the addresses. */
- for (regno = regsave; regno >= 0; regno--)
- {
- get_frame_saved_regs (fi)[regno] = get_frame_base (fi) - val;
- val -= 4;
- }
- if (get_frame_extra_info (fi)->leaf_function)
- {
- /* Set the register SP to contain the stack pointer of
- the caller. */
- get_frame_saved_regs (fi)[SP_REGNUM] = get_frame_base (fi) + 4;
- }
+ /* Calculate the addresses for the saved registers on the stack. */
+ /* FIXME: The address calculation should really be done on the fly while
+ we're analyzing the prologue (we only hold one regsave value as it is
+ now). */
+ val = info->sp_offset;
+
+ for (regno = regsave; regno >= 0; regno--)
+ {
+ info->saved_regs[regno].addr = info->base + info->r8_offset - val;
+ val -= 4;
+ }
+
+ /* The previous frame's SP needed to be computed. Save the computed
+ value. */
+ trad_frame_set_value (info->saved_regs, SP_REGNUM, info->prev_sp);
+
+ if (!info->leaf_function)
+ {
+ /* SRP saved on the stack. But where? */
+ if (info->r8_offset == 0)
+ {
+ /* R8 not pushed yet. */
+ info->saved_regs[SRP_REGNUM].addr = info->base;
+ }
else
- {
- /* Set the register SP to contain the stack pointer of
- the caller. */
- get_frame_saved_regs (fi)[SP_REGNUM] = get_frame_base (fi) + 8;
-
- /* Set the register SRP to contain the return address of
- the caller. */
- get_frame_saved_regs (fi)[SRP_REGNUM] = get_frame_base (fi) + 4;
- }
+ {
+ /* R8 pushed, but SP may or may not be moved to R8 yet. */
+ info->saved_regs[SRP_REGNUM].addr = info->base + 4;
+ }
}
- return ip;
-}
-/* Advance pc beyond any function entry prologue instructions at pc
- to reach some "real" code. */
+ /* The PC is found in SRP (the actual register or located on the stack). */
+ info->saved_regs[PC_REGNUM] = info->saved_regs[SRP_REGNUM];
-CORE_ADDR
-cris_skip_prologue (CORE_ADDR pc)
-{
- return cris_skip_prologue_main (pc, 0);
+ return pc;
}
-/* As cris_skip_prologue, but stops as soon as it knows that the function
- has a frame. Its result is equal to its input pc if the function is
- frameless, unequal otherwise. */
-
-CORE_ADDR
-cris_skip_prologue_frameless_p (CORE_ADDR pc)
+static CORE_ADDR
+crisv32_scan_prologue (CORE_ADDR pc, struct frame_info *next_frame,
+ struct cris_unwind_cache *info)
{
- return cris_skip_prologue_main (pc, 1);
+ ULONGEST this_base;
+
+ /* Unlike the CRISv10 prologue scanner (cris_scan_prologue), this is not
+ meant to be a full-fledged prologue scanner. It is only needed for
+ the cases where we end up in code always lacking DWARF-2 CFI, notably:
+
+ * PLT stubs (library calls)
+ * call dummys
+ * signal trampolines
+
+ For those cases, it is assumed that there is no actual prologue; that
+ the stack pointer is not adjusted, and (as a consequence) the return
+ address is not pushed onto the stack. */
+
+ /* We only want to know the end of the prologue when next_frame and info
+ are NULL (called from cris_skip_prologue i.e.). */
+ if (next_frame == NULL && info == NULL)
+ {
+ return pc;
+ }
+
+ /* The SP is assumed to be unaltered. */
+ frame_unwind_unsigned_register (next_frame, SP_REGNUM, &this_base);
+ info->base = this_base;
+ info->prev_sp = this_base;
+
+ /* The PC is assumed to be found in SRP. */
+ info->saved_regs[PC_REGNUM] = info->saved_regs[SRP_REGNUM];
+
+ return pc;
}
+/* Advance pc beyond any function entry prologue instructions at pc
+ to reach some "real" code. */
+
/* Given a PC value corresponding to the start of a function, return the PC
of the first instruction after the function prologue. */
-CORE_ADDR
-cris_skip_prologue_main (CORE_ADDR pc, int frameless_p)
+static CORE_ADDR
+cris_skip_prologue (CORE_ADDR pc)
{
- struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
- struct frame_info *fi;
- struct symtab_and_line sal = find_pc_line (pc, 0);
- int best_limit;
+ CORE_ADDR func_addr, func_end;
+ struct symtab_and_line sal;
CORE_ADDR pc_after_prologue;
- /* frame_info now contains dynamic memory. Since fi is a dummy
- here, I don't bother allocating memory for saved_regs. */
- fi = deprecated_frame_xmalloc_with_cleanup (0, sizeof (struct frame_extra_info));
-
- /* If there is no symbol information then sal.end == 0, and we end up
- examining only the first instruction in the function prologue.
- Exaggerating the limit seems to be harmless. */
- if (sal.end > 0)
- best_limit = sal.end;
+ /* If we have line debugging information, then the end of the prologue
+ should the first assembly instruction of the first source line. */
+ if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
+ {
+ sal = find_pc_line (func_addr, 0);
+ if (sal.end > 0 && sal.end < func_end)
+ return sal.end;
+ }
+
+ if (cris_version () == 32)
+ pc_after_prologue = crisv32_scan_prologue (pc, NULL, NULL);
else
- best_limit = pc + 100;
+ pc_after_prologue = cris_scan_prologue (pc, NULL, NULL);
- pc_after_prologue = cris_examine (pc, best_limit, fi, frameless_p);
- do_cleanups (old_chain);
return pc_after_prologue;
}
+static CORE_ADDR
+cris_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ ULONGEST pc;
+ frame_unwind_unsigned_register (next_frame, PC_REGNUM, &pc);
+ return pc;
+}
+
+static CORE_ADDR
+cris_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
+{
+ ULONGEST sp;
+ frame_unwind_unsigned_register (next_frame, SP_REGNUM, &sp);
+ return sp;
+}
+
/* Use the program counter to determine the contents and size of a breakpoint
instruction. It returns a pointer to a string of bytes that encode a
breakpoint instruction, stores the length of the string to *lenptr, and
adjusts pcptr (if necessary) to point to the actual memory location where
the breakpoint should be inserted. */
-const unsigned char *
+static const unsigned char *
cris_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
{
- static unsigned char break_insn[] = {0x38, 0xe9};
+ static unsigned char break8_insn[] = {0x38, 0xe9};
+ static unsigned char break15_insn[] = {0x3f, 0xe9};
*lenptr = 2;
- return break_insn;
-}
-
-/* Returns the register SRP (subroutine return pointer) which must contain
- the content of the register PC after a function call. */
-
-static CORE_ADDR
-cris_saved_pc_after_call (struct frame_info *frame)
-{
- return read_register (SRP_REGNUM);
+ if (cris_mode () == cris_mode_guru)
+ return break15_insn;
+ else
+ return break8_insn;
}
/* Returns 1 if spec_reg is applicable to the current gdbarch's CRIS version,
0 otherwise. */
-int
+static int
cris_spec_reg_applicable (struct cris_spec_reg spec_reg)
{
int version = cris_version ();
case cris_ver_warning:
/* Indeterminate/obsolete. */
return 0;
- case cris_ver_sim:
- /* Simulator only. */
- return 0;
case cris_ver_v0_3:
return (version >= 0 && version <= 3);
case cris_ver_v3p:
return (version == 8 || version == 9);
case cris_ver_v8p:
return (version >= 8);
+ case cris_ver_v0_10:
+ return (version >= 0 && version <= 10);
+ case cris_ver_v3_10:
+ return (version >= 3 && version <= 10);
+ case cris_ver_v8_10:
+ return (version >= 8 && version <= 10);
+ case cris_ver_v10:
+ return (version == 10);
case cris_ver_v10p:
return (version >= 10);
+ case cris_ver_v32p:
+ return (version >= 32);
default:
/* Invalid cris version. */
return 0;
/* Returns the register size in unit byte. Returns 0 for an unimplemented
register, -1 for an invalid register. */
-int
+static int
cris_register_size (int regno)
{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
int i;
int spec_regno;
/* General registers (R0 - R15) are 32 bits. */
return 4;
}
- else if (regno >= NUM_GENREGS && regno < NUM_REGS)
+ else if (regno >= NUM_GENREGS && regno < (NUM_GENREGS + NUM_SPECREGS))
{
/* Special register (R16 - R31). cris_spec_regs is zero-based.
Adjust regno accordingly. */
spec_regno = regno - NUM_GENREGS;
- /* The entries in cris_spec_regs are stored in register number order,
- which means we can shortcut into the array when searching it. */
- for (i = spec_regno; cris_spec_regs[i].name != NULL; i++)
+ for (i = 0; cris_spec_regs[i].name != NULL; i++)
{
if (cris_spec_regs[i].number == spec_regno
&& cris_spec_reg_applicable (cris_spec_regs[i]))
/* Special register not applicable to this CRIS version. */
return 0;
}
- else
+ else if (regno >= PC_REGNUM && regno < NUM_REGS)
{
- /* Invalid register. */
- return -1;
+ /* This will apply to CRISv32 only where there are additional registers
+ after the special registers (pseudo PC and support registers). */
+ return 4;
}
+
+
+ return -1;
}
/* Nonzero if regno should not be fetched from the target. This is the case
for unimplemented (size 0) and non-existant registers. */
-int
+static int
cris_cannot_fetch_register (int regno)
{
return ((regno < 0 || regno >= NUM_REGS)
/* Nonzero if regno should not be written to the target, for various
reasons. */
-int
+static int
cris_cannot_store_register (int regno)
{
/* There are three kinds of registers we refuse to write to.
return 1;
else if (regno == VR_REGNUM)
- /* Read-only. */
- return 1;
-
- else if (regno == P0_REGNUM || regno == P4_REGNUM || regno == P8_REGNUM)
- /* Writing has no effect. */
- return 1;
-
- else if (cris_mode () == CRIS_MODE_USER)
- {
- if (regno == IBR_REGNUM || regno == BAR_REGNUM || regno == BRP_REGNUM
- || regno == IRP_REGNUM)
- /* Read-only in user mode. */
- return 1;
- }
-
- return 0;
-}
-
-/* Returns the register offset for the first byte of register regno's space
- in the saved register state. Returns -1 for an invalid or unimplemented
- register. */
-
-int
-cris_register_offset (int regno)
-{
- int i;
- int reg_size;
- int offset = 0;
-
- if (regno >= 0 && regno < NUM_REGS)
- {
- /* FIXME: The offsets should be cached and calculated only once,
- when the architecture being debugged has changed. */
- for (i = 0; i < regno; i++)
- offset += cris_register_size (i);
-
- return offset;
- }
- else
- {
- /* Invalid register. */
- return -1;
- }
-}
-
-/* Return the GDB type (defined in gdbtypes.c) for the "standard" data type
- of data in register regno. */
-
-struct type *
-cris_register_virtual_type (int regno)
-{
- if (regno == SP_REGNUM || regno == PC_REGNUM
- || (regno > P8_REGNUM && regno < USP_REGNUM))
- {
- /* SP, PC, IBR, IRP, SRP, BAR, DCCR, BRP */
- return lookup_pointer_type (builtin_type_void);
- }
- else if (regno == P8_REGNUM || regno == USP_REGNUM
- || (regno >= 0 && regno < SP_REGNUM))
- {
- /* R0 - R13, P8, P15 */
- return builtin_type_unsigned_long;
- }
- else if (regno > P3_REGNUM && regno < P8_REGNUM)
- {
- /* P4, CCR, DCR0, DCR1 */
- return builtin_type_unsigned_short;
- }
- else if (regno > PC_REGNUM && regno < P4_REGNUM)
- {
- /* P0, P1, P2, P3 */
- return builtin_type_unsigned_char;
- }
- else
- {
- /* Invalid register. */
- return builtin_type_void;
- }
-}
-
-/* Stores a function return value of type type, where valbuf is the address
- of the value to be stored. */
-
-/* In the original CRIS ABI, R10 is used to store return values. */
-
-void
-cris_abi_original_store_return_value (struct type *type, char *valbuf)
-{
- int len = TYPE_LENGTH (type);
-
- if (len <= DEPRECATED_REGISTER_SIZE)
- deprecated_write_register_bytes (REGISTER_BYTE (RET_REGNUM), valbuf, len);
- else
- internal_error (__FILE__, __LINE__, "cris_abi_original_store_return_value: type length too large.");
-}
-
-/* In the CRIS ABI V2, R10 and R11 are used to store return values. */
-
-void
-cris_abi_v2_store_return_value (struct type *type, char *valbuf)
-{
- int len = TYPE_LENGTH (type);
-
- if (len <= 2 * DEPRECATED_REGISTER_SIZE)
- {
- /* Note that this works since R10 and R11 are consecutive registers. */
- deprecated_write_register_bytes (REGISTER_BYTE (RET_REGNUM), valbuf,
- len);
- }
- else
- internal_error (__FILE__, __LINE__, "cris_abi_v2_store_return_value: type length too large.");
-}
-
-/* Return the name of register regno as a string. Return NULL for an invalid or
- unimplemented register. */
-
-const char *
-cris_register_name (int regno)
-{
- static char *cris_genreg_names[] =
- { "r0", "r1", "r2", "r3", \
- "r4", "r5", "r6", "r7", \
- "r8", "r9", "r10", "r11", \
- "r12", "r13", "sp", "pc" };
-
- int i;
- int spec_regno;
-
- if (regno >= 0 && regno < NUM_GENREGS)
- {
- /* General register. */
- return cris_genreg_names[regno];
- }
- else if (regno >= NUM_GENREGS && regno < NUM_REGS)
- {
- /* Special register (R16 - R31). cris_spec_regs is zero-based.
- Adjust regno accordingly. */
- spec_regno = regno - NUM_GENREGS;
-
- /* The entries in cris_spec_regs are stored in register number order,
- which means we can shortcut into the array when searching it. */
- for (i = spec_regno; cris_spec_regs[i].name != NULL; i++)
- {
- if (cris_spec_regs[i].number == spec_regno
- && cris_spec_reg_applicable (cris_spec_regs[i]))
- /* Go with the first applicable register. */
- return cris_spec_regs[i].name;
- }
- /* Special register not applicable to this CRIS version. */
- return NULL;
- }
- else
- {
- /* Invalid register. */
- return NULL;
- }
-}
-
-int
-cris_register_bytes_ok (long bytes)
-{
- return (bytes == DEPRECATED_REGISTER_BYTES);
-}
-
-/* Extract from an array regbuf containing the raw register state a function
- return value of type type, and copy that, in virtual format, into
- valbuf. */
-
-/* In the original CRIS ABI, R10 is used to return values. */
-
-void
-cris_abi_original_extract_return_value (struct type *type, char *regbuf,
- char *valbuf)
-{
- int len = TYPE_LENGTH (type);
-
- if (len <= DEPRECATED_REGISTER_SIZE)
- memcpy (valbuf, regbuf + REGISTER_BYTE (RET_REGNUM), len);
- else
- internal_error (__FILE__, __LINE__, "cris_abi_original_extract_return_value: type length too large");
-}
+ /* Read-only. */
+ return 1;
-/* In the CRIS ABI V2, R10 and R11 are used to store return values. */
+ else if (regno == P0_REGNUM || regno == P4_REGNUM || regno == P8_REGNUM)
+ /* Writing has no effect. */
+ return 1;
-void
-cris_abi_v2_extract_return_value (struct type *type, char *regbuf,
- char *valbuf)
-{
- int len = TYPE_LENGTH (type);
+ /* IBR, BAR, BRP and IRP are read-only in user mode. Let the debug
+ agent decide whether they are writable. */
- if (len <= 2 * DEPRECATED_REGISTER_SIZE)
- memcpy (valbuf, regbuf + REGISTER_BYTE (RET_REGNUM), len);
- else
- internal_error (__FILE__, __LINE__, "cris_abi_v2_extract_return_value: type length too large");
+ return 0;
}
-/* Store the address of the place in which to copy the structure the
- subroutine will return. In the CRIS ABI, R9 is used in order to pass
- the address of the allocated area where a structure return value must
- be stored. R9 is call-clobbered, which means we must save it here for
- later use. */
+/* Nonzero if regno should not be fetched from the target. This is the case
+ for unimplemented (size 0) and non-existant registers. */
-void
-cris_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
+static int
+crisv32_cannot_fetch_register (int regno)
{
- write_register (STR_REGNUM, addr);
- struct_return_address = addr;
+ return ((regno < 0 || regno >= NUM_REGS)
+ || (cris_register_size (regno) == 0));
}
-/* Extract from regbuf the address where a function should return a
- structure value. It's not there in the CRIS ABI, so we must do it another
- way. */
+/* Nonzero if regno should not be written to the target, for various
+ reasons. */
-CORE_ADDR
-cris_extract_struct_value_address (char *regbuf)
+static int
+crisv32_cannot_store_register (int regno)
{
- return struct_return_address;
-}
-
-/* Returns 1 if a value of the given type being returned from a function
- must have space allocated for it on the stack. gcc_p is true if the
- function being considered is known to have been compiled by GCC.
- In the CRIS ABI, structure return values are passed to the called
- function by reference in register R9 to a caller-allocated area, so
- this is always true. */
+ /* There are three kinds of registers we refuse to write to.
+ 1. Those that not implemented.
+ 2. Those that are read-only (depends on the processor mode).
+ 3. Those registers to which a write has no effect.
+ */
-int
-cris_use_struct_convention (int gcc_p, struct type *type)
-{
- return 1;
-}
+ if (regno < 0 || regno >= NUM_REGS || cris_register_size (regno) == 0)
+ /* Not implemented. */
+ return 1;
-/* Returns 1 if the given type will be passed by pointer rather than
- directly. */
+ else if (regno == VR_REGNUM)
+ /* Read-only. */
+ return 1;
-/* In the original CRIS ABI, arguments shorter than or equal to 32 bits are
- passed by value. */
+ else if (regno == BZ_REGNUM || regno == WZ_REGNUM || regno == DZ_REGNUM)
+ /* Writing has no effect. */
+ return 1;
-int
-cris_abi_original_reg_struct_has_addr (int gcc_p, struct type *type)
-{
- return (TYPE_LENGTH (type) > 4);
+ /* Many special registers are read-only in user mode. Let the debug
+ agent decide whether they are writable. */
+
+ return 0;
}
-/* In the CRIS ABI V2, arguments shorter than or equal to 64 bits are passed
- by value. */
+/* Return the GDB type (defined in gdbtypes.c) for the "standard" data type
+ of data in register regno. */
-int
-cris_abi_v2_reg_struct_has_addr (int gcc_p, struct type *type)
-{
- return (TYPE_LENGTH (type) > 8);
+static struct type *
+cris_register_type (struct gdbarch *gdbarch, int regno)
+{
+ if (regno == PC_REGNUM)
+ return builtin_type_void_func_ptr;
+ else if (regno == SP_REGNUM || regno == CRIS_FP_REGNUM)
+ return builtin_type_void_data_ptr;
+ else if ((regno >= 0 && regno < SP_REGNUM)
+ || (regno >= MOF_REGNUM && regno <= USP_REGNUM))
+ /* Note: R8 taken care of previous clause. */
+ return builtin_type_uint32;
+ else if (regno >= P4_REGNUM && regno <= CCR_REGNUM)
+ return builtin_type_uint16;
+ else if (regno >= P0_REGNUM && regno <= VR_REGNUM)
+ return builtin_type_uint8;
+ else
+ /* Invalid (unimplemented) register. */
+ return builtin_type_int0;
}
-/* Returns 1 if the function invocation represented by fi does not have a
- stack frame associated with it. Otherwise return 0. */
-
-int
-cris_frameless_function_invocation (struct frame_info *fi)
+static struct type *
+crisv32_register_type (struct gdbarch *gdbarch, int regno)
{
- if ((get_frame_type (fi) == SIGTRAMP_FRAME))
- return 0;
+ if (regno == PC_REGNUM)
+ return builtin_type_void_func_ptr;
+ else if (regno == SP_REGNUM || regno == CRIS_FP_REGNUM)
+ return builtin_type_void_data_ptr;
+ else if ((regno >= 0 && regno <= ACR_REGNUM)
+ || (regno >= EXS_REGNUM && regno <= SPC_REGNUM)
+ || (regno == PID_REGNUM)
+ || (regno >= S0_REGNUM && regno <= S15_REGNUM))
+ /* Note: R8 and SP taken care of by previous clause. */
+ return builtin_type_uint32;
+ else if (regno == WZ_REGNUM)
+ return builtin_type_uint16;
+ else if (regno == BZ_REGNUM || regno == VR_REGNUM || regno == SRS_REGNUM)
+ return builtin_type_uint8;
else
- return frameless_look_for_prologue (fi);
+ {
+ /* Invalid (unimplemented) register. Should not happen as there are
+ no unimplemented CRISv32 registers. */
+ warning (_("crisv32_register_type: unknown regno %d"), regno);
+ return builtin_type_int0;
+ }
}
-/* See frame.h. Determines the address of all registers in the
- current stack frame storing each in frame->saved_regs. Space for
- frame->saved_regs shall be allocated by
- DEPRECATED_FRAME_INIT_SAVED_REGS using frame_saved_regs_zalloc. */
-
-void
-cris_frame_init_saved_regs (struct frame_info *fi)
-{
- CORE_ADDR ip;
- struct symtab_and_line sal;
- int best_limit;
- char *dummy_regs = deprecated_generic_find_dummy_frame (get_frame_pc (fi),
- get_frame_base (fi));
-
- /* Examine the entire prologue. */
- register int frameless_p = 0;
+/* Stores a function return value of type type, where valbuf is the address
+ of the value to be stored. */
- /* Has this frame's registers already been initialized? */
- if (get_frame_saved_regs (fi))
- return;
+/* In the CRIS ABI, R10 and R11 are used to store return values. */
- frame_saved_regs_zalloc (fi);
+static void
+cris_store_return_value (struct type *type, struct regcache *regcache,
+ const void *valbuf)
+{
+ ULONGEST val;
+ int len = TYPE_LENGTH (type);
- if (dummy_regs)
+ if (len <= 4)
+ {
+ /* Put the return value in R10. */
+ val = extract_unsigned_integer (valbuf, len);
+ regcache_cooked_write_unsigned (regcache, ARG1_REGNUM, val);
+ }
+ else if (len <= 8)
{
- /* I don't see this ever happening, considering the context in which
- cris_frame_init_saved_regs is called (always when we're not in
- a dummy frame). */
- memcpy (get_frame_saved_regs (fi), dummy_regs, SIZEOF_FRAME_SAVED_REGS);
+ /* Put the return value in R10 and R11. */
+ val = extract_unsigned_integer (valbuf, 4);
+ regcache_cooked_write_unsigned (regcache, ARG1_REGNUM, val);
+ val = extract_unsigned_integer ((char *)valbuf + 4, len - 4);
+ regcache_cooked_write_unsigned (regcache, ARG2_REGNUM, val);
}
else
- {
- ip = get_frame_func (fi);
- sal = find_pc_line (ip, 0);
-
- /* If there is no symbol information then sal.end == 0, and we end up
- examining only the first instruction in the function prologue.
- Exaggerating the limit seems to be harmless. */
- if (sal.end > 0)
- best_limit = sal.end;
- else
- best_limit = ip + 100;
+ error (_("cris_store_return_value: type length too large."));
+}
+
+/* Return the name of register regno as a string. Return NULL for an invalid or
+ unimplemented register. */
+
+static const char *
+cris_special_register_name (int regno)
+{
+ int spec_regno;
+ int i;
- cris_examine (ip, best_limit, fi, frameless_p);
+ /* Special register (R16 - R31). cris_spec_regs is zero-based.
+ Adjust regno accordingly. */
+ spec_regno = regno - NUM_GENREGS;
+
+ /* Assume nothing about the layout of the cris_spec_regs struct
+ when searching. */
+ for (i = 0; cris_spec_regs[i].name != NULL; i++)
+ {
+ if (cris_spec_regs[i].number == spec_regno
+ && cris_spec_reg_applicable (cris_spec_regs[i]))
+ /* Go with the first applicable register. */
+ return cris_spec_regs[i].name;
}
+ /* Special register not applicable to this CRIS version. */
+ return NULL;
}
-/* Initialises the extra frame information at the creation of a new frame.
- The inparameter fromleaf is 0 when the call is from create_new_frame.
- When the call is from get_prev_frame_info, fromleaf is determined by
- cris_frameless_function_invocation. */
-
-void
-cris_init_extra_frame_info (int fromleaf, struct frame_info *fi)
+static const char *
+cris_register_name (int regno)
{
- if (get_next_frame (fi))
+ static char *cris_genreg_names[] =
+ { "r0", "r1", "r2", "r3", \
+ "r4", "r5", "r6", "r7", \
+ "r8", "r9", "r10", "r11", \
+ "r12", "r13", "sp", "pc" };
+
+ if (regno >= 0 && regno < NUM_GENREGS)
{
- /* Called from get_prev_frame. */
- deprecated_update_frame_pc_hack (fi, DEPRECATED_FRAME_SAVED_PC (get_next_frame (fi)));
+ /* General register. */
+ return cris_genreg_names[regno];
}
-
- frame_extra_info_zalloc (fi, sizeof (struct frame_extra_info));
-
- get_frame_extra_info (fi)->return_pc = 0;
- get_frame_extra_info (fi)->leaf_function = 0;
-
- if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi),
- get_frame_base (fi),
- get_frame_base (fi)))
- {
- /* We need to setup fi->frame here because call_function_by_hand
- gets it wrong by assuming it's always FP. */
- deprecated_update_frame_base_hack (fi, deprecated_read_register_dummy (get_frame_pc (fi), get_frame_base (fi), SP_REGNUM));
- get_frame_extra_info (fi)->return_pc =
- deprecated_read_register_dummy (get_frame_pc (fi),
- get_frame_base (fi), PC_REGNUM);
-
- /* FIXME: Is this necessarily true? */
- get_frame_extra_info (fi)->leaf_function = 0;
+ else if (regno >= NUM_GENREGS && regno < NUM_REGS)
+ {
+ return cris_special_register_name (regno);
}
else
{
- cris_frame_init_saved_regs (fi);
-
- /* Check fromleaf/frameless_function_invocation. (FIXME) */
-
- if (get_frame_saved_regs (fi)[SRP_REGNUM] != 0)
- {
- /* SRP was saved on the stack; non-leaf function. */
- get_frame_extra_info (fi)->return_pc =
- read_memory_integer (get_frame_saved_regs (fi)[SRP_REGNUM],
- REGISTER_RAW_SIZE (SRP_REGNUM));
- }
- else
- {
- /* SRP is still in a register; leaf function. */
- get_frame_extra_info (fi)->return_pc = read_register (SRP_REGNUM);
- /* FIXME: Should leaf_function be set to 1 here? */
- get_frame_extra_info (fi)->leaf_function = 1;
- }
+ /* Invalid register. */
+ return NULL;
}
}
-/* Return the content of the frame pointer in the present frame. In other
- words, determine the address of the calling function's frame. */
-
-CORE_ADDR
-cris_frame_chain (struct frame_info *fi)
+static const char *
+crisv32_register_name (int regno)
{
- if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi),
- get_frame_base (fi),
- get_frame_base (fi)))
+ static char *crisv32_genreg_names[] =
+ { "r0", "r1", "r2", "r3", \
+ "r4", "r5", "r6", "r7", \
+ "r8", "r9", "r10", "r11", \
+ "r12", "r13", "sp", "acr"
+ };
+
+ static char *crisv32_sreg_names[] =
+ { "s0", "s1", "s2", "s3", \
+ "s4", "s5", "s6", "s7", \
+ "s8", "s9", "s10", "s11", \
+ "s12", "s13", "s14", "s15"
+ };
+
+ if (regno >= 0 && regno < NUM_GENREGS)
{
- return get_frame_base (fi);
+ /* General register. */
+ return crisv32_genreg_names[regno];
+ }
+ else if (regno >= NUM_GENREGS && regno < (NUM_GENREGS + NUM_SPECREGS))
+ {
+ return cris_special_register_name (regno);
+ }
+ else if (regno == PC_REGNUM)
+ {
+ return "pc";
}
- else if (!inside_entry_file (get_frame_pc (fi)))
+ else if (regno >= S0_REGNUM && regno <= S15_REGNUM)
{
- return read_memory_unsigned_integer (get_frame_base (fi), 4);
+ return crisv32_sreg_names[regno - S0_REGNUM];
}
else
{
- return 0;
+ /* Invalid register. */
+ return NULL;
}
}
-/* Return the saved PC (which equals the return address) of this frame. */
+/* Convert DWARF register number REG to the appropriate register
+ number used by GDB. */
-CORE_ADDR
-cris_frame_saved_pc (struct frame_info *fi)
+static int
+cris_dwarf2_reg_to_regnum (int reg)
{
- return get_frame_extra_info (fi)->return_pc;
+ /* We need to re-map a couple of registers (SRP is 16 in Dwarf-2 register
+ numbering, MOF is 18).
+ Adapted from gcc/config/cris/cris.h. */
+ static int cris_dwarf_regmap[] = {
+ 0, 1, 2, 3,
+ 4, 5, 6, 7,
+ 8, 9, 10, 11,
+ 12, 13, 14, 15,
+ 27, -1, -1, -1,
+ -1, -1, -1, 23,
+ -1, -1, -1, 27,
+ -1, -1, -1, -1
+ };
+ int regnum = -1;
+
+ if (reg >= 0 && reg < ARRAY_SIZE (cris_dwarf_regmap))
+ regnum = cris_dwarf_regmap[reg];
+
+ if (regnum == -1)
+ warning (_("Unmapped DWARF Register #%d encountered."), reg);
+
+ return regnum;
}
-/* Setup the function arguments for calling a function in the inferior. */
+/* DWARF-2 frame support. */
-CORE_ADDR
-cris_abi_original_push_arguments (int nargs, struct value **args,
- CORE_ADDR sp, int struct_return,
- CORE_ADDR struct_addr)
+static void
+cris_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
+ struct dwarf2_frame_state_reg *reg,
+ struct frame_info *next_frame)
{
- int stack_alloc;
- int stack_offset;
- int argreg;
- int argnum;
- struct type *type;
- int len;
- CORE_ADDR regval;
- char *val;
-
- /* Data and parameters reside in different areas on the stack.
- Both frame pointers grow toward higher addresses. */
- CORE_ADDR fp_params;
- CORE_ADDR fp_data;
-
- /* Are we returning a value using a structure return or a normal value
- return? struct_addr is the address of the reserved space for the return
- structure to be written on the stack. */
- if (struct_return)
- {
- write_register (STR_REGNUM, struct_addr);
- }
-
- /* Make sure there's space on the stack. Allocate space for data and a
- parameter to refer to that data. */
- for (argnum = 0, stack_alloc = 0; argnum < nargs; argnum++)
- stack_alloc += (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + DEPRECATED_REGISTER_SIZE);
- sp -= stack_alloc;
- /* We may over-allocate a little here, but that won't hurt anything. */
-
- /* Initialize stack frame pointers. */
- fp_params = sp;
- fp_data = sp + (nargs * DEPRECATED_REGISTER_SIZE);
-
- /* Now load as many as possible of the first arguments into
- registers, and push the rest onto the stack. */
- argreg = ARG1_REGNUM;
- stack_offset = 0;
-
- for (argnum = 0; argnum < nargs; argnum++)
- {
- type = VALUE_TYPE (args[argnum]);
- len = TYPE_LENGTH (type);
- val = (char *) VALUE_CONTENTS (args[argnum]);
-
- if (len <= DEPRECATED_REGISTER_SIZE && argreg <= ARG4_REGNUM)
- {
- /* Data fits in a register; put it in the first available
- register. */
- write_register (argreg, *(unsigned long *) val);
- argreg++;
- }
- else if (len > DEPRECATED_REGISTER_SIZE && argreg <= ARG4_REGNUM)
- {
- /* Data does not fit in register; pass it on the stack and
- put its address in the first available register. */
- write_memory (fp_data, val, len);
- write_register (argreg, fp_data);
- fp_data += len;
- argreg++;
- }
- else if (len > DEPRECATED_REGISTER_SIZE)
- {
- /* Data does not fit in register; put both data and
- parameter on the stack. */
- write_memory (fp_data, val, len);
- write_memory (fp_params, (char *) (&fp_data), DEPRECATED_REGISTER_SIZE);
- fp_data += len;
- fp_params += DEPRECATED_REGISTER_SIZE;
- }
- else
- {
- /* Data fits in a register, but we are out of registers;
- put the parameter on the stack. */
- write_memory (fp_params, val, DEPRECATED_REGISTER_SIZE);
- fp_params += DEPRECATED_REGISTER_SIZE;
- }
- }
+ /* The return address column. */
+ if (regnum == PC_REGNUM)
+ reg->how = DWARF2_FRAME_REG_RA;
- return sp;
+ /* The call frame address. */
+ else if (regnum == SP_REGNUM)
+ reg->how = DWARF2_FRAME_REG_CFA;
}
-CORE_ADDR
-cris_abi_v2_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
- int struct_return, CORE_ADDR struct_addr)
-{
- int stack_alloc;
- int stack_offset;
- int argreg;
- int argnum;
+/* Extract from an array regbuf containing the raw register state a function
+ return value of type type, and copy that, in virtual format, into
+ valbuf. */
- CORE_ADDR regval;
+/* In the CRIS ABI, R10 and R11 are used to store return values. */
- /* The function's arguments and memory allocated by gdb for the arguments to
- point at reside in separate areas on the stack.
- Both frame pointers grow toward higher addresses. */
- CORE_ADDR fp_arg;
- CORE_ADDR fp_mem;
+static void
+cris_extract_return_value (struct type *type, struct regcache *regcache,
+ void *valbuf)
+{
+ ULONGEST val;
+ int len = TYPE_LENGTH (type);
- /* Are we returning a value using a structure return or a normal value
- return? struct_addr is the address of the reserved space for the return
- structure to be written on the stack. */
- if (struct_return)
- {
- write_register (STR_REGNUM, struct_addr);
- }
-
- /* Allocate enough to keep things word-aligned on both parts of the
- stack. */
- stack_alloc = 0;
- for (argnum = 0; argnum < nargs; argnum++)
+ if (len <= 4)
{
- int len;
- int reg_demand;
-
- len = TYPE_LENGTH (VALUE_TYPE (args[argnum]));
- reg_demand = (len / DEPRECATED_REGISTER_SIZE) + (len % DEPRECATED_REGISTER_SIZE != 0 ? 1 : 0);
-
- /* reg_demand * DEPRECATED_REGISTER_SIZE is the amount of memory
- we might need to allocate for this argument. 2 *
- DEPRECATED_REGISTER_SIZE is the amount of stack space we
- might need to pass the argument itself (either by value or by
- reference). */
- stack_alloc += (reg_demand * DEPRECATED_REGISTER_SIZE + 2 * DEPRECATED_REGISTER_SIZE);
+ /* Get the return value from R10. */
+ regcache_cooked_read_unsigned (regcache, ARG1_REGNUM, &val);
+ store_unsigned_integer (valbuf, len, val);
}
- sp -= stack_alloc;
- /* We may over-allocate a little here, but that won't hurt anything. */
-
- /* Initialize frame pointers. */
- fp_arg = sp;
- fp_mem = sp + (nargs * (2 * DEPRECATED_REGISTER_SIZE));
-
- /* Now load as many as possible of the first arguments into registers,
- and push the rest onto the stack. */
- argreg = ARG1_REGNUM;
- stack_offset = 0;
-
- for (argnum = 0; argnum < nargs; argnum++)
+ else if (len <= 8)
{
- int len;
- char *val;
- int reg_demand;
- int i;
-
- len = TYPE_LENGTH (VALUE_TYPE (args[argnum]));
- val = (char *) VALUE_CONTENTS (args[argnum]);
-
- /* How may registers worth of storage do we need for this argument? */
- reg_demand = (len / DEPRECATED_REGISTER_SIZE) + (len % DEPRECATED_REGISTER_SIZE != 0 ? 1 : 0);
-
- if (len <= (2 * DEPRECATED_REGISTER_SIZE)
- && (argreg + reg_demand - 1 <= ARG4_REGNUM))
- {
- /* Data passed by value. Fits in available register(s). */
- for (i = 0; i < reg_demand; i++)
- {
- write_register (argreg, *(unsigned long *) val);
- argreg++;
- val += DEPRECATED_REGISTER_SIZE;
- }
- }
- else if (len <= (2 * DEPRECATED_REGISTER_SIZE) && argreg <= ARG4_REGNUM)
- {
- /* Data passed by value. Does not fit in available register(s).
- Use the register(s) first, then the stack. */
- for (i = 0; i < reg_demand; i++)
- {
- if (argreg <= ARG4_REGNUM)
- {
- write_register (argreg, *(unsigned long *) val);
- argreg++;
- val += DEPRECATED_REGISTER_SIZE;
- }
- else
- {
- /* I guess this memory write could write the
- remaining data all at once instead of in
- DEPRECATED_REGISTER_SIZE chunks. */
- write_memory (fp_arg, val, DEPRECATED_REGISTER_SIZE);
- fp_arg += DEPRECATED_REGISTER_SIZE;
- val += DEPRECATED_REGISTER_SIZE;
- }
- }
- }
- else if (len > (2 * DEPRECATED_REGISTER_SIZE))
- {
- /* Data passed by reference. Put it on the stack. */
- write_memory (fp_mem, val, len);
- write_memory (fp_arg, (char *) (&fp_mem), DEPRECATED_REGISTER_SIZE);
-
- /* fp_mem need not be word-aligned since it's just a chunk of
- memory being pointed at. That is, += len would do. */
- fp_mem += reg_demand * DEPRECATED_REGISTER_SIZE;
- fp_arg += DEPRECATED_REGISTER_SIZE;
- }
- else
- {
- /* Data passed by value. No available registers. Put it on
- the stack. */
- write_memory (fp_arg, val, len);
-
- /* fp_arg must be word-aligned (i.e., don't += len) to match
- the function prologue. */
- fp_arg += reg_demand * DEPRECATED_REGISTER_SIZE;
- }
+ /* Get the return value from R10 and R11. */
+ regcache_cooked_read_unsigned (regcache, ARG1_REGNUM, &val);
+ store_unsigned_integer (valbuf, 4, val);
+ regcache_cooked_read_unsigned (regcache, ARG2_REGNUM, &val);
+ store_unsigned_integer ((char *)valbuf + 4, len - 4, val);
}
-
- return sp;
+ else
+ error (_("cris_extract_return_value: type length too large"));
}
-/* Never put the return address on the stack. The register SRP is pushed
- by the called function unless it is a leaf-function. Due to the BRP
- register the PC will change when continue is sent. */
+/* Handle the CRIS return value convention. */
-CORE_ADDR
-cris_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
+static enum return_value_convention
+cris_return_value (struct gdbarch *gdbarch, struct type *type,
+ struct regcache *regcache, gdb_byte *readbuf,
+ const gdb_byte *writebuf)
{
- write_register (SRP_REGNUM, CALL_DUMMY_ADDRESS ());
- return sp;
+ if (TYPE_CODE (type) == TYPE_CODE_STRUCT
+ || TYPE_CODE (type) == TYPE_CODE_UNION
+ || TYPE_LENGTH (type) > 8)
+ /* Structs, unions, and anything larger than 8 bytes (2 registers)
+ goes on the stack. */
+ return RETURN_VALUE_STRUCT_CONVENTION;
+
+ if (readbuf)
+ cris_extract_return_value (type, regcache, readbuf);
+ if (writebuf)
+ cris_store_return_value (type, regcache, writebuf);
+
+ return RETURN_VALUE_REGISTER_CONVENTION;
}
-/* Restore the machine to the state it had before the current frame
- was created. Discard the innermost frame from the stack and restore
- all saved registers. */
+/* Returns 1 if the given type will be passed by pointer rather than
+ directly. */
-void
-cris_pop_frame (void)
-{
- register struct frame_info *fi = get_current_frame ();
- register int regno;
- register int stack_offset = 0;
-
- if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi),
- get_frame_base (fi),
- get_frame_base (fi)))
- {
- /* This happens when we hit a breakpoint set at the entry point,
- when returning from a dummy frame. */
- generic_pop_dummy_frame ();
- }
- else
- {
- cris_frame_init_saved_regs (fi);
-
- /* For each register, the address of where it was saved on entry to
- the frame now lies in fi->saved_regs[regno], or zero if it was not
- saved. This includes special registers such as PC and FP saved in
- special ways in the stack frame. The SP_REGNUM is even more
- special, the address here is the SP for the next frame, not the
- address where the SP was saved. */
-
- /* Restore general registers R0 - R7. They were pushed on the stack
- after SP was saved. */
- for (regno = 0; regno < DEPRECATED_FP_REGNUM; regno++)
- {
- if (get_frame_saved_regs (fi)[regno])
- {
- write_register (regno,
- read_memory_integer (get_frame_saved_regs (fi)[regno], 4));
- }
- }
-
- if (get_frame_saved_regs (fi)[DEPRECATED_FP_REGNUM])
- {
- /* Pop the frame pointer (R8). It was pushed before SP
- was saved. */
- write_register (DEPRECATED_FP_REGNUM,
- read_memory_integer (get_frame_saved_regs (fi)[DEPRECATED_FP_REGNUM], 4));
- stack_offset += 4;
-
- /* Not a leaf function. */
- if (get_frame_saved_regs (fi)[SRP_REGNUM])
- {
- /* SRP was pushed before SP was saved. */
- stack_offset += 4;
- }
-
- /* Restore the SP and adjust for R8 and (possibly) SRP. */
- write_register (SP_REGNUM, get_frame_saved_regs (fi)[DEPRECATED_FP_REGNUM] + stack_offset);
- }
- else
- {
- /* Currently, we can't get the correct info into fi->saved_regs
- without a frame pointer. */
- }
-
- /* Restore the PC. */
- write_register (PC_REGNUM, get_frame_extra_info (fi)->return_pc);
- }
- flush_cached_frames ();
+/* In the CRIS ABI, arguments shorter than or equal to 64 bits are passed
+ by value. */
+
+static int
+cris_reg_struct_has_addr (int gcc_p, struct type *type)
+{
+ return (TYPE_LENGTH (type) > 8);
}
/* Calculates a value that measures how good inst_args constraints an
for (i = 0; cris_opcodes[i].name != NULL; i++)
{
if (((cris_opcodes[i].match & insn) == cris_opcodes[i].match)
- && ((cris_opcodes[i].lose & insn) == 0))
+ && ((cris_opcodes[i].lose & insn) == 0)
+ /* Only CRISv10 instructions, please. */
+ && (cris_opcodes[i].applicable_version != cris_ver_v32p))
{
level_of_match = constraint (insn, cris_opcodes[i].args, inst_env);
if (level_of_match >= 0)
digs through the opcodes in order to find all possible targets.
Either one ordinary target or two targets for branches may be found. */
-void
+static void
cris_software_single_step (enum target_signal ignore, int insert_breakpoints)
{
inst_env_type inst_env;
-
+
if (insert_breakpoints)
{
/* Analyse the present instruction environment and insert
int status = find_step_target (&inst_env);
if (status == -1)
{
- /* Could not find a target. FIXME: Should do something. */
+ /* Could not find a target. Things are likely to go downhill
+ from here. */
+ warning (_("CRIS software single step could not find a step target."));
}
else
{
/* Insert at most two breakpoints. One for the next PC content
and possibly another one for a branch, jump, etc. */
- next_pc = (CORE_ADDR) inst_env.reg[PC_REGNUM];
- target_insert_breakpoint (next_pc, break_mem[0]);
+ CORE_ADDR next_pc = (CORE_ADDR) inst_env.reg[PC_REGNUM];
+ insert_single_step_breakpoint (next_pc);
if (inst_env.branch_found
&& (CORE_ADDR) inst_env.branch_break_address != next_pc)
{
- branch_target_address =
- (CORE_ADDR) inst_env.branch_break_address;
- target_insert_breakpoint (branch_target_address, break_mem[1]);
- branch_break_inserted = 1;
+ CORE_ADDR branch_target_address
+ = (CORE_ADDR) inst_env.branch_break_address;
+ insert_single_step_breakpoint (branch_target_address);
}
}
}
else
- {
- /* Remove breakpoints. */
- target_remove_breakpoint (next_pc, break_mem[0]);
- if (branch_break_inserted)
- {
- target_remove_breakpoint (branch_target_address, break_mem[1]);
- branch_break_inserted = 0;
- }
- }
+ remove_single_step_breakpoints ();
}
/* Calculates the prefix value for quick offset addressing mode. */
-void
+static void
quick_mode_bdap_prefix (unsigned short inst, inst_env_type *inst_env)
{
/* It's invalid to be in a delay slot. You can't have a prefix to this
from the size of the operation. The PC is always kept aligned on even
word addresses. */
-void
+static void
process_autoincrement (int size, unsigned short inst, inst_env_type *inst_env)
{
if (size == INST_BYTE_SIZE)
/* Just a forward declaration. */
-unsigned long get_data_from_address (unsigned short *inst, CORE_ADDR address);
+static unsigned long get_data_from_address (unsigned short *inst,
+ CORE_ADDR address);
/* Calculates the prefix value for the general case of offset addressing
mode. */
-void
+static void
bdap_prefix (unsigned short inst, inst_env_type *inst_env)
{
/* Calculates the prefix value for the index addressing mode. */
-void
+static void
biap_prefix (unsigned short inst, inst_env_type *inst_env)
{
/* It's invalid to be in a delay slot. I can't see that it's possible to
/* Calculates the prefix value for the double indirect addressing mode. */
-void
+static void
dip_prefix (unsigned short inst, inst_env_type *inst_env)
{
/* Finds the destination for a branch with 8-bits offset. */
-void
+static void
eight_bit_offset_branch_op (unsigned short inst, inst_env_type *inst_env)
{
/* Finds the destination for a branch with 16-bits offset. */
-void
+static void
sixteen_bit_offset_branch_op (unsigned short inst, inst_env_type *inst_env)
{
short offset;
/* Handles the ABS instruction. */
-void
+static void
abs_op (unsigned short inst, inst_env_type *inst_env)
{
/* Handles the ADDI instruction. */
-void
+static void
addi_op (unsigned short inst, inst_env_type *inst_env)
{
/* It's invalid to have the PC as base register. And ADDI can't have
/* Handles the ASR instruction. */
-void
+static void
asr_op (unsigned short inst, inst_env_type *inst_env)
{
int shift_steps;
/* Handles the ASRQ instruction. */
-void
+static void
asrq_op (unsigned short inst, inst_env_type *inst_env)
{
/* Handles the AX, EI and SETF instruction. */
-void
+static void
ax_ei_setf_op (unsigned short inst, inst_env_type *inst_env)
{
if (inst_env->prefix_found)
register. Note that check_assign assumes that the caller has checked that
there is a prefix to this instruction. The mode check depends on this. */
-void
+static void
check_assign (unsigned short inst, inst_env_type *inst_env)
{
/* Check if it's an assign addressing mode. */
/* Handles the 2-operand BOUND instruction. */
-void
+static void
two_operand_bound_op (unsigned short inst, inst_env_type *inst_env)
{
/* It's invalid to have the PC as the index operand. */
/* Handles the 3-operand BOUND instruction. */
-void
+static void
three_operand_bound_op (unsigned short inst, inst_env_type *inst_env)
{
/* It's an error if we haven't got a prefix. And it's also an error
/* Clears the status flags in inst_env. */
-void
+static void
btst_nop_op (unsigned short inst, inst_env_type *inst_env)
{
/* It's an error if we have got a prefix. */
/* Clears the status flags in inst_env. */
-void
+static void
clearf_di_op (unsigned short inst, inst_env_type *inst_env)
{
/* It's an error if we have got a prefix. */
/* Handles the CLEAR instruction if it's in register mode. */
-void
+static void
reg_mode_clear_op (unsigned short inst, inst_env_type *inst_env)
{
/* Check if the target is the PC. */
/* Handles the TEST instruction if it's in register mode. */
-void
+static void
reg_mode_test_op (unsigned short inst, inst_env_type *inst_env)
{
/* It's an error if we have got a prefix. */
/* Handles the CLEAR and TEST instruction if the instruction isn't
in register mode. */
-void
+static void
none_reg_mode_clear_test_op (unsigned short inst, inst_env_type *inst_env)
{
/* Check if we are in a prefix mode. */
/* Checks that the PC isn't the destination register or the instructions has
a prefix. */
-void
+static void
dstep_logshift_mstep_neg_not_op (unsigned short inst, inst_env_type *inst_env)
{
/* It's invalid to have the PC as the destination. The instruction can't
/* Checks that the instruction doesn't have a prefix. */
-void
+static void
break_op (unsigned short inst, inst_env_type *inst_env)
{
/* The instruction can't have a prefix. */
/* Checks that the PC isn't the destination register and that the instruction
doesn't have a prefix. */
-void
+static void
scc_op (unsigned short inst, inst_env_type *inst_env)
{
/* It's invalid to have the PC as the destination. The instruction can't
/* Handles the register mode JUMP instruction. */
-void
+static void
reg_mode_jump_op (unsigned short inst, inst_env_type *inst_env)
{
/* It's invalid to do a JUMP in a delay slot. The mode is register, so
/* Handles the JUMP instruction for all modes except register. */
-void none_reg_mode_jump_op (unsigned short inst, inst_env_type *inst_env)
+static void
+none_reg_mode_jump_op (unsigned short inst, inst_env_type *inst_env)
{
unsigned long newpc;
CORE_ADDR address;
/* Handles moves to special registers (aka P-register) for all modes. */
-void
+static void
move_to_preg_op (unsigned short inst, inst_env_type *inst_env)
{
if (inst_env->prefix_found)
/* Handles moves from special registers (aka P-register) for all modes
except register. */
-void
+static void
none_reg_mode_move_from_preg_op (unsigned short inst, inst_env_type *inst_env)
{
if (inst_env->prefix_found)
/* Handles moves from special registers (aka P-register) when the mode
is register. */
-void
+static void
reg_mode_move_from_preg_op (unsigned short inst, inst_env_type *inst_env)
{
/* Register mode move from special register can't have a prefix. */
/* Handles the MOVEM from memory to general register instruction. */
-void
+static void
move_mem_to_reg_movem_op (unsigned short inst, inst_env_type *inst_env)
{
if (inst_env->prefix_found)
/* Handles the MOVEM to memory from general register instruction. */
-void
+static void
move_reg_to_mem_movem_op (unsigned short inst, inst_env_type *inst_env)
{
if (inst_env->prefix_found)
inst_env->disable_interrupt = 0;
}
-/* Handles the pop instruction to a general register.
- POP is a assembler macro for MOVE.D [SP+], Rd. */
-
-void
-reg_pop_op (unsigned short inst, inst_env_type *inst_env)
-{
- /* POP can't have a prefix. */
- if (inst_env->prefix_found)
- {
- inst_env->invalid = 1;
- return;
- }
- if (cris_get_operand2 (inst) == REG_PC)
- {
- /* It's invalid to change the PC in a delay slot. */
- if (inst_env->slot_needed)
- {
- inst_env->invalid = 1;
- return;
- }
- inst_env->reg[REG_PC] =
- read_memory_unsigned_integer (inst_env->reg[REG_SP], 4);
- }
- inst_env->slot_needed = 0;
- inst_env->prefix_found = 0;
- inst_env->xflag_found = 0;
- inst_env->disable_interrupt = 0;
-}
-
-/* Handles moves from register to memory. */
-
-void
-move_reg_to_mem_index_inc_op (unsigned short inst, inst_env_type *inst_env)
-{
- /* Check if we have a prefix. */
- if (inst_env->prefix_found)
- {
- /* The only thing that can change the PC is an assign. */
- check_assign (inst, inst_env);
- }
- else if ((cris_get_operand1 (inst) == REG_PC)
- && (cris_get_mode (inst) == AUTOINC_MODE))
- {
- /* It's invalid to change the PC in a delay slot. */
- if (inst_env->slot_needed)
- {
- inst_env->invalid = 1;
- return;
- }
- process_autoincrement (cris_get_size (inst), inst, inst_env);
- }
- inst_env->slot_needed = 0;
- inst_env->prefix_found = 0;
- inst_env->xflag_found = 0;
- inst_env->disable_interrupt = 0;
-}
-
/* Handles the intructions that's not yet implemented, by setting
inst_env->invalid to true. */
-void
+static void
not_implemented_op (unsigned short inst, inst_env_type *inst_env)
{
inst_env->invalid = 1;
/* Handles the XOR instruction. */
-void
+static void
xor_op (unsigned short inst, inst_env_type *inst_env)
{
/* XOR can't have a prefix. */
/* Handles the MULS instruction. */
-void
+static void
muls_op (unsigned short inst, inst_env_type *inst_env)
{
/* MULS/U can't have a prefix. */
/* Handles the MULU instruction. */
-void
+static void
mulu_op (unsigned short inst, inst_env_type *inst_env)
{
/* MULS/U can't have a prefix. */
/* Calculate the result of the instruction for ADD, SUB, CMP AND, OR and MOVE.
The MOVE instruction is the move from source to register. */
-void
+static void
add_sub_cmp_and_or_move_action (unsigned short inst, inst_env_type *inst_env,
unsigned long source1, unsigned long source2)
{
is zero extend then the value is extended with zero. If instead the mode
is signed extend the sign bit of the value is taken into consideration. */
-unsigned long
+static unsigned long
do_sign_or_zero_extend (unsigned long value, unsigned short *inst)
{
/* The size can be either byte or word, check which one it is.
/* Handles the register mode for the ADD, SUB, CMP, AND, OR and MOVE
instruction. The MOVE instruction is the move from source to register. */
-void
+static void
reg_mode_add_sub_cmp_and_or_move_op (unsigned short inst,
inst_env_type *inst_env)
{
the size of the operation. If the instruction is a zero or signed
extend instruction, the size field is changed in instruction. */
-unsigned long
+static unsigned long
get_data_from_address (unsigned short *inst, CORE_ADDR address)
{
int size = cris_get_size (*inst);
/* Handles the assign addresing mode for the ADD, SUB, CMP, AND, OR and MOVE
instructions. The MOVE instruction is the move from source to register. */
-void
+static void
handle_prefix_assign_mode_for_aritm_op (unsigned short inst,
inst_env_type *inst_env)
{
OR instructions. Note that for this to work as expected, the calling
function must have made sure that there is a prefix to this instruction. */
-void
+static void
three_operand_add_sub_cmp_and_or_op (unsigned short inst,
inst_env_type *inst_env)
{
/* Handles the index addresing mode for the ADD, SUB, CMP, AND, OR and MOVE
instructions. The MOVE instruction is the move from source to register. */
-void
+static void
handle_prefix_index_mode_for_aritm_op (unsigned short inst,
inst_env_type *inst_env)
{
CMP, AND OR and MOVE instruction. The MOVE instruction is the move from
source to register. */
-void
+static void
handle_inc_and_index_mode_for_aritm_op (unsigned short inst,
inst_env_type *inst_env)
{
/* Handles the two-operand addressing mode, all modes except register, for
the ADD, SUB CMP, AND and OR instruction. */
-void
+static void
none_reg_mode_add_sub_cmp_and_or_move_op (unsigned short inst,
inst_env_type *inst_env)
{
/* Handles the quick addressing mode for the ADD and SUB instruction. */
-void
+static void
quick_mode_add_sub_op (unsigned short inst, inst_env_type *inst_env)
{
unsigned long operand1;
/* Handles the quick addressing mode for the CMP, AND and OR instruction. */
-void
+static void
quick_mode_and_cmp_move_or_op (unsigned short inst, inst_env_type *inst_env)
{
unsigned long operand1;
/* Translate op_type to a function and call it. */
-static void cris_gdb_func (enum cris_op_type op_type, unsigned short inst,
- inst_env_type *inst_env)
+static void
+cris_gdb_func (enum cris_op_type op_type, unsigned short inst,
+ inst_env_type *inst_env)
{
switch (op_type)
{
exec_bfd has been set. */
static int
-cris_delayed_get_disassembler (bfd_vma addr, disassemble_info *info)
+cris_delayed_get_disassembler (bfd_vma addr, struct disassemble_info *info)
{
- deprecated_tm_print_insn = cris_get_disassembler (exec_bfd);
- return TARGET_PRINT_INSN (addr, info);
+ int (*print_insn) (bfd_vma addr, struct disassemble_info *info);
+ /* FIXME: cagney/2003-08-27: It should be possible to select a CRIS
+ disassembler, even when there is no BFD. Does something like
+ "gdb; target remote; disassmeble *0x123" work? */
+ gdb_assert (exec_bfd != NULL);
+ print_insn = cris_get_disassembler (exec_bfd);
+ gdb_assert (print_insn != NULL);
+ return print_insn (addr, info);
}
/* Copied from <asm/elf.h>. */
typedef unsigned long elf_greg_t;
/* Same as user_regs_struct struct in <asm/user.h>. */
-typedef elf_greg_t elf_gregset_t[35];
+#define CRISV10_ELF_NGREG 35
+typedef elf_greg_t elf_gregset_t[CRISV10_ELF_NGREG];
+
+#define CRISV32_ELF_NGREG 32
+typedef elf_greg_t crisv32_elf_gregset_t[CRISV32_ELF_NGREG];
/* Unpack an elf_gregset_t into GDB's register cache. */
-void
+static void
supply_gregset (elf_gregset_t *gregsetp)
{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
int i;
elf_greg_t *regp = *gregsetp;
static char zerobuf[4] = {0};
knows about the actual size of each register so that's no problem. */
for (i = 0; i < NUM_GENREGS + NUM_SPECREGS; i++)
{
- supply_register (i, (char *)®p[i]);
+ regcache_raw_supply (current_regcache, i, (char *)®p[i]);
+ }
+
+ if (tdep->cris_version == 32)
+ {
+ /* Needed to set pseudo-register PC for CRISv32. */
+ /* FIXME: If ERP is in a delay slot at this point then the PC will
+ be wrong. Issue a warning to alert the user. */
+ regcache_raw_supply (current_regcache, PC_REGNUM,
+ (char *)®p[ERP_REGNUM]);
+
+ if (*(char *)®p[ERP_REGNUM] & 0x1)
+ fprintf_unfiltered (gdb_stderr, "Warning: PC in delay slot\n");
}
}
switch (which)
{
case 0:
- if (core_reg_size != sizeof (gregset))
+ if (core_reg_size != sizeof (elf_gregset_t)
+ && core_reg_size != sizeof (crisv32_elf_gregset_t))
{
- warning ("wrong size gregset struct in core file");
+ warning (_("wrong size gregset struct in core file"));
}
else
{
NULL /* next */
};
-/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for native GNU/Linux CRIS targets using the struct
- offsets defined in link.h (but without actual reference to that
- file).
-
- This makes it possible to access GNU/Linux CRIS shared libraries
- from a GDB that was not built on an GNU/Linux CRIS host (for cross
- debugging).
-
- See gdb/solib-svr4.h for an explanation of these fields. */
-
-struct link_map_offsets *
-cris_linux_svr4_fetch_link_map_offsets (void)
-{
- static struct link_map_offsets lmo;
- static struct link_map_offsets *lmp = NULL;
-
- if (lmp == NULL)
- {
- lmp = &lmo;
-
- lmo.r_debug_size = 8; /* The actual size is 20 bytes, but
- this is all we need. */
- lmo.r_map_offset = 4;
- lmo.r_map_size = 4;
-
- lmo.link_map_size = 20;
-
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 4;
-
- lmo.l_name_offset = 4;
- lmo.l_name_size = 4;
-
- lmo.l_next_offset = 12;
- lmo.l_next_size = 4;
-
- lmo.l_prev_offset = 16;
- lmo.l_prev_size = 4;
- }
-
- return lmp;
-}
-
-static void
-cris_fpless_backtrace (char *noargs, int from_tty)
-{
- /* Points at the instruction after the jsr (except when in innermost frame
- where it points at the original pc). */
- CORE_ADDR pc = 0;
-
- /* Temporary variable, used for parsing from the start of the function that
- the pc is in, up to the pc. */
- CORE_ADDR tmp_pc = 0;
- CORE_ADDR sp = 0;
-
- /* Information about current frame. */
- struct symtab_and_line sal;
- char* func_name;
-
- /* Present instruction. */
- unsigned short insn;
-
- /* Next instruction, lookahead. */
- unsigned short insn_next;
-
- /* This is to store the offset between sp at start of function and until we
- reach push srp (if any). */
- int sp_add_later = 0;
- int push_srp_found = 0;
-
- int val = 0;
-
- /* Frame counter. */
- int frame = 0;
-
- /* For the innermost frame, we want to look at srp in case it's a leaf
- function (since there's no push srp in that case). */
- int innermost_frame = 1;
-
- deprecated_read_register_gen (PC_REGNUM, (char *) &pc);
- deprecated_read_register_gen (SP_REGNUM, (char *) &sp);
-
- /* We make an explicit return when we can't find an outer frame. */
- while (1)
- {
- /* Get file name and line number. */
- sal = find_pc_line (pc, 0);
-
- /* Get function name. */
- find_pc_partial_function (pc, &func_name, (CORE_ADDR *) NULL,
- (CORE_ADDR *) NULL);
-
- /* Print information about current frame. */
- printf_unfiltered ("#%i 0x%08lx in %s", frame++, pc, func_name);
- if (sal.symtab)
- {
- printf_unfiltered (" at %s:%i", sal.symtab->filename, sal.line);
- }
- printf_unfiltered ("\n");
-
- /* Get the start address of this function. */
- tmp_pc = get_pc_function_start (pc);
-
- /* Mini parser, only meant to find push sp and sub ...,sp from the start
- of the function, up to the pc. */
- while (tmp_pc < pc)
- {
- insn = read_memory_unsigned_integer (tmp_pc, sizeof (short));
- tmp_pc += sizeof (short);
- if (insn == 0xE1FC)
- {
- /* push <reg> 32 bit instruction */
- insn_next = read_memory_unsigned_integer (tmp_pc,
- sizeof (short));
- tmp_pc += sizeof (short);
-
- /* Recognize srp. */
- if (insn_next == 0xBE7E)
- {
- /* For subsequent (not this one though) push or sub which
- affects sp, adjust sp immediately. */
- push_srp_found = 1;
-
- /* Note: this will break if we ever encounter a
- push vr (1 byte) or push ccr (2 bytes). */
- sp_add_later += 4;
- }
- else
- {
- /* Some other register was pushed. */
- if (push_srp_found)
- {
- sp += 4;
- }
- else
- {
- sp_add_later += 4;
- }
- }
- }
- else if (cris_get_operand2 (insn) == SP_REGNUM
- && cris_get_mode (insn) == 0x0000
- && cris_get_opcode (insn) == 0x000A)
- {
- /* subq <val>,sp */
- val = cris_get_quick_value (insn);
-
- if (push_srp_found)
- {
- sp += val;
- }
- else
- {
- sp_add_later += val;
- }
-
- }
- else if (cris_get_operand2 (insn) == SP_REGNUM
- /* Autoincrement addressing mode. */
- && cris_get_mode (insn) == 0x0003
- /* Opcode. */
- && ((insn) & 0x03E0) >> 5 == 0x0004)
- {
- /* subu <val>,sp */
- val = get_data_from_address (&insn, tmp_pc);
-
- if (push_srp_found)
- {
- sp += val;
- }
- else
- {
- sp_add_later += val;
- }
- }
- else if (cris_get_operand2 (insn) == SP_REGNUM
- && ((insn & 0x0F00) >> 8) == 0x0001
- && (cris_get_signed_offset (insn) < 0))
- {
- /* Immediate byte offset addressing prefix word with sp as base
- register. Used for CRIS v8 i.e. ETRAX 100 and newer if <val>
- is between 64 and 128.
- movem r<regsave>,[sp=sp-<val>] */
- val = -cris_get_signed_offset (insn);
- insn_next = read_memory_unsigned_integer (tmp_pc,
- sizeof (short));
- tmp_pc += sizeof (short);
-
- if (cris_get_mode (insn_next) == PREFIX_ASSIGN_MODE
- && cris_get_opcode (insn_next) == 0x000F
- && cris_get_size (insn_next) == 0x0003
- && cris_get_operand1 (insn_next) == SP_REGNUM)
- {
- if (push_srp_found)
- {
- sp += val;
- }
- else
- {
- sp_add_later += val;
- }
- }
- }
- }
-
- if (push_srp_found)
- {
- /* Reset flag. */
- push_srp_found = 0;
-
- /* sp should now point at where srp is stored on the stack. Update
- the pc to the srp. */
- pc = read_memory_unsigned_integer (sp, 4);
- }
- else if (innermost_frame)
- {
- /* We couldn't find a push srp in the prologue, so this must be
- a leaf function, and thus we use the srp register directly.
- This should happen at most once, for the innermost function. */
- deprecated_read_register_gen (SRP_REGNUM, (char *) &pc);
- }
- else
- {
- /* Couldn't find an outer frame. */
- return;
- }
-
- /* Reset flag. (In case the innermost frame wasn't a leaf, we don't
- want to look at the srp register later either). */
- innermost_frame = 0;
-
- /* Now, add the offset for everything up to, and including push srp,
- that was held back during the prologue parsing. */
- sp += sp_add_later;
- sp_add_later = 0;
- }
-}
+extern initialize_file_ftype _initialize_cris_tdep; /* -Wmissing-prototypes */
void
_initialize_cris_tdep (void)
{
+ static struct cmd_list_element *cris_set_cmdlist;
+ static struct cmd_list_element *cris_show_cmdlist;
+
struct cmd_list_element *c;
gdbarch_register (bfd_arch_cris, cris_gdbarch_init, cris_dump_tdep);
- /* Used in disassembly. */
- deprecated_tm_print_insn = cris_delayed_get_disassembler;
-
/* CRIS-specific user-commands. */
- c = add_set_cmd ("cris-version", class_support, var_integer,
- (char *) &usr_cmd_cris_version,
- "Set the current CRIS version.", &setlist);
- set_cmd_sfunc (c, cris_version_update);
- add_show_from_set (c, &showlist);
-
- c = add_set_enum_cmd ("cris-mode", class_support, cris_mode_enums,
- &usr_cmd_cris_mode,
- "Set the current CRIS mode.", &setlist);
- set_cmd_sfunc (c, cris_mode_update);
- add_show_from_set (c, &showlist);
-
- c = add_set_enum_cmd ("cris-abi", class_support, cris_abi_enums,
- &usr_cmd_cris_abi,
- "Set the current CRIS ABI version.", &setlist);
- set_cmd_sfunc (c, cris_abi_update);
- add_show_from_set (c, &showlist);
-
- c = add_cmd ("cris-fpless-backtrace", class_support, cris_fpless_backtrace,
- "Display call chain using the subroutine return pointer.\n"
- "Note that this displays the address after the jump to the "
- "subroutine.", &cmdlist);
-
- add_core_fns (&cris_elf_core_fns);
+ add_setshow_uinteger_cmd ("cris-version", class_support,
+ &usr_cmd_cris_version,
+ _("Set the current CRIS version."),
+ _("Show the current CRIS version."),
+ _("\
+Set to 10 for CRISv10 or 32 for CRISv32 if autodetection fails.\n\
+Defaults to 10. "),
+ set_cris_version,
+ NULL, /* FIXME: i18n: Current CRIS version is %s. */
+ &setlist, &showlist);
+
+ add_setshow_enum_cmd ("cris-mode", class_support,
+ cris_modes, &usr_cmd_cris_mode,
+ _("Set the current CRIS mode."),
+ _("Show the current CRIS mode."),
+ _("\
+Set to CRIS_MODE_GURU when debugging in guru mode.\n\
+Makes GDB use the NRP register instead of the ERP register in certain cases."),
+ set_cris_mode,
+ NULL, /* FIXME: i18n: Current CRIS version is %s. */
+ &setlist, &showlist);
+ add_setshow_boolean_cmd ("cris-dwarf2-cfi", class_support,
+ &usr_cmd_cris_dwarf2_cfi,
+ _("Set the usage of Dwarf-2 CFI for CRIS."),
+ _("Show the usage of Dwarf-2 CFI for CRIS."),
+ _("Set this to \"off\" if using gcc-cris < R59."),
+ set_cris_dwarf2_cfi,
+ NULL, /* FIXME: i18n: Usage of Dwarf-2 CFI for CRIS is %d. */
+ &setlist, &showlist);
+
+ deprecated_add_core_fns (&cris_elf_core_fns);
}
/* Prints out all target specific values. */
tdep->cris_version);
fprintf_unfiltered (file, "cris_dump_tdep: tdep->cris_mode = %s\n",
tdep->cris_mode);
- fprintf_unfiltered (file, "cris_dump_tdep: tdep->cris_abi = %s\n",
- tdep->cris_abi);
-
+ fprintf_unfiltered (file, "cris_dump_tdep: tdep->cris_dwarf2_cfi = %i\n",
+ tdep->cris_dwarf2_cfi);
}
}
static void
-cris_version_update (char *ignore_args, int from_tty,
- struct cmd_list_element *c)
+set_cris_version (char *ignore_args, int from_tty,
+ struct cmd_list_element *c)
{
struct gdbarch_info info;
- /* NOTE: cagney/2002-03-17: The add_show_from_set() function clones
- the set command passed as a parameter. The clone operation will
- include (BUG?) any ``set'' command callback, if present.
- Commands like ``info set'' call all the ``show'' command
- callbacks. Unfortunatly, for ``show'' commands cloned from
- ``set'', this includes callbacks belonging to ``set'' commands.
- Making this worse, this only occures if add_show_from_set() is
- called after add_cmd_sfunc() (BUG?). */
-
- /* From here on, trust the user's CRIS version setting. */
- if (cmd_type (c) == set_cmd)
- {
- usr_cmd_cris_version_valid = 1;
+ usr_cmd_cris_version_valid = 1;
- /* Update the current architecture, if needed. */
- gdbarch_info_init (&info);
- if (!gdbarch_update_p (info))
- internal_error (__FILE__, __LINE__, "cris_gdbarch_update: failed to update architecture.");
- }
+ /* Update the current architecture, if needed. */
+ gdbarch_info_init (&info);
+ if (!gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("cris_gdbarch_update: failed to update architecture."));
}
static void
-cris_mode_update (char *ignore_args, int from_tty,
- struct cmd_list_element *c)
+set_cris_mode (char *ignore_args, int from_tty,
+ struct cmd_list_element *c)
{
struct gdbarch_info info;
-
- /* NOTE: cagney/2002-03-17: The add_show_from_set() function clones
- the set command passed as a parameter. The clone operation will
- include (BUG?) any ``set'' command callback, if present.
- Commands like ``info set'' call all the ``show'' command
- callbacks. Unfortunatly, for ``show'' commands cloned from
- ``set'', this includes callbacks belonging to ``set'' commands.
- Making this worse, this only occures if add_show_from_set() is
- called after add_cmd_sfunc() (BUG?). */
-
- /* From here on, trust the user's CRIS mode setting. */
- if (cmd_type (c) == set_cmd)
- {
- usr_cmd_cris_mode_valid = 1;
-
- /* Update the current architecture, if needed. */
- gdbarch_info_init (&info);
- if (!gdbarch_update_p (info))
- internal_error (__FILE__, __LINE__, "cris_gdbarch_update: failed to update architecture.");
- }
+
+ /* Update the current architecture, if needed. */
+ gdbarch_info_init (&info);
+ if (!gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ "cris_gdbarch_update: failed to update architecture.");
}
static void
-cris_abi_update (char *ignore_args, int from_tty,
- struct cmd_list_element *c)
+set_cris_dwarf2_cfi (char *ignore_args, int from_tty,
+ struct cmd_list_element *c)
{
struct gdbarch_info info;
-
- /* NOTE: cagney/2002-03-17: The add_show_from_set() function clones
- the set command passed as a parameter. The clone operation will
- include (BUG?) any ``set'' command callback, if present.
- Commands like ``info set'' call all the ``show'' command
- callbacks. Unfortunatly, for ``show'' commands cloned from
- ``set'', this includes callbacks belonging to ``set'' commands.
- Making this worse, this only occures if add_show_from_set() is
- called after add_cmd_sfunc() (BUG?). */
-
- /* From here on, trust the user's CRIS ABI setting. */
- if (cmd_type (c) == set_cmd)
- {
- usr_cmd_cris_abi_valid = 1;
-
- /* Update the current architecture, if needed. */
- gdbarch_info_init (&info);
- if (!gdbarch_update_p (info))
- internal_error (__FILE__, __LINE__, "cris_gdbarch_update: failed to update architecture.");
- }
-}
-
-/* Copied from pa64solib.c, with a couple of minor changes. */
-static CORE_ADDR
-bfd_lookup_symbol (bfd *abfd, const char *symname)
-{
- unsigned int storage_needed;
- asymbol *sym;
- asymbol **symbol_table;
- unsigned int number_of_symbols;
- unsigned int i;
- struct cleanup *back_to;
- CORE_ADDR symaddr = 0;
-
- storage_needed = bfd_get_symtab_upper_bound (abfd);
-
- if (storage_needed > 0)
- {
- symbol_table = (asymbol **) xmalloc (storage_needed);
- back_to = make_cleanup (free, symbol_table);
- number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
-
- for (i = 0; i < number_of_symbols; i++)
- {
- sym = *symbol_table++;
- if (!strcmp (sym->name, symname))
- {
- /* Bfd symbols are section relative. */
- symaddr = sym->value + sym->section->vma;
- break;
- }
- }
- do_cleanups (back_to);
- }
- return (symaddr);
+ /* Update the current architecture, if needed. */
+ gdbarch_info_init (&info);
+ if (!gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("cris_gdbarch_update: failed to update architecture."));
}
static struct gdbarch *
struct gdbarch *gdbarch;
struct gdbarch_tdep *tdep;
int cris_version;
- const char *cris_mode;
- const char *cris_abi;
- CORE_ADDR cris_abi_sym = 0;
- int register_bytes;
if (usr_cmd_cris_version_valid)
{
/* Trust the user's CRIS version setting. */
cris_version = usr_cmd_cris_version;
}
- else
- {
- /* Assume it's CRIS version 10. */
- cris_version = 10;
- }
-
- if (usr_cmd_cris_mode_valid)
- {
- /* Trust the user's CRIS mode setting. */
- cris_mode = usr_cmd_cris_mode;
- }
- else if (cris_version == 10)
- {
- /* Assume CRIS version 10 is in user mode. */
- cris_mode = CRIS_MODE_USER;
- }
- else
- {
- /* Strictly speaking, older CRIS version don't have a supervisor mode,
- but we regard its only mode as supervisor mode. */
- cris_mode = CRIS_MODE_SUPERVISOR;
- }
-
- if (usr_cmd_cris_abi_valid)
- {
- /* Trust the user's ABI setting. */
- cris_abi = usr_cmd_cris_abi;
- }
- else if (info.abfd)
- {
- if (bfd_get_flavour (info.abfd) == bfd_target_elf_flavour)
- {
- /* An elf target uses the new ABI. */
- cris_abi = CRIS_ABI_V2;
- }
- else if (bfd_get_flavour (info.abfd) == bfd_target_aout_flavour)
- {
- /* An a.out target may use either ABI. Look for hints in the
- symbol table. */
- cris_abi_sym = bfd_lookup_symbol (info.abfd, CRIS_ABI_SYMBOL);
- cris_abi = cris_abi_sym ? CRIS_ABI_V2 : CRIS_ABI_ORIGINAL;
- }
- else
- {
- /* Unknown bfd flavour. Assume it's the new ABI. */
- cris_abi = CRIS_ABI_V2;
- }
- }
- else if (arches != NULL)
+ else if (info.abfd && bfd_get_mach (info.abfd) == bfd_mach_cris_v32)
{
- /* No bfd available. Stick with the ABI from the most recently
- selected architecture of this same family (the head of arches
- always points to this). (This is to avoid changing the ABI
- when the user updates the architecture with the 'set
- cris-version' command.) */
- cris_abi = gdbarch_tdep (arches->gdbarch)->cris_abi;
+ cris_version = 32;
}
else
{
- /* No bfd, and no previously selected architecture available.
- Assume it's the new ABI. */
- cris_abi = CRIS_ABI_V2;
+ /* Assume it's CRIS version 10. */
+ cris_version = 10;
}
/* Make the current settings visible to the user. */
usr_cmd_cris_version = cris_version;
- usr_cmd_cris_mode = cris_mode;
- usr_cmd_cris_abi = cris_abi;
- /* Find a candidate among the list of pre-declared architectures. Both
- CRIS version and ABI must match. */
+ /* Find a candidate among the list of pre-declared architectures. */
for (arches = gdbarch_list_lookup_by_info (arches, &info);
arches != NULL;
arches = gdbarch_list_lookup_by_info (arches->next, &info))
{
- if ((gdbarch_tdep (arches->gdbarch)->cris_version == cris_version)
- && (gdbarch_tdep (arches->gdbarch)->cris_mode == cris_mode)
- && (gdbarch_tdep (arches->gdbarch)->cris_abi == cris_abi))
+ if ((gdbarch_tdep (arches->gdbarch)->cris_version
+ == usr_cmd_cris_version)
+ && (gdbarch_tdep (arches->gdbarch)->cris_mode
+ == usr_cmd_cris_mode)
+ && (gdbarch_tdep (arches->gdbarch)->cris_dwarf2_cfi
+ == usr_cmd_cris_dwarf2_cfi))
return arches->gdbarch;
}
tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep));
gdbarch = gdbarch_alloc (&info, tdep);
- /* NOTE: cagney/2002-12-06: This can be deleted when this arch is
- ready to unwind the PC first (see frame.c:get_prev_frame()). */
- set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_default);
-
- tdep->cris_version = cris_version;
- tdep->cris_mode = cris_mode;
- tdep->cris_abi = cris_abi;
+ tdep->cris_version = usr_cmd_cris_version;
+ tdep->cris_mode = usr_cmd_cris_mode;
+ tdep->cris_dwarf2_cfi = usr_cmd_cris_dwarf2_cfi;
/* INIT shall ensure that the INFO.BYTE_ORDER is non-zero. */
switch (info.byte_order)
break;
case BFD_ENDIAN_BIG:
- internal_error (__FILE__, __LINE__, "cris_gdbarch_init: big endian byte order in info");
+ internal_error (__FILE__, __LINE__, _("cris_gdbarch_init: big endian byte order in info"));
break;
default:
- internal_error (__FILE__, __LINE__, "cris_gdbarch_init: unknown byte order in info");
+ internal_error (__FILE__, __LINE__, _("cris_gdbarch_init: unknown byte order in info"));
}
- /* Initialize the ABI dependent things. */
- if (tdep->cris_abi == CRIS_ABI_ORIGINAL)
- {
- set_gdbarch_double_bit (gdbarch, 32);
- set_gdbarch_deprecated_push_arguments (gdbarch, cris_abi_original_push_arguments);
- set_gdbarch_deprecated_store_return_value (gdbarch,
- cris_abi_original_store_return_value);
- set_gdbarch_deprecated_extract_return_value
- (gdbarch, cris_abi_original_extract_return_value);
- set_gdbarch_reg_struct_has_addr
- (gdbarch, cris_abi_original_reg_struct_has_addr);
- }
- else if (tdep->cris_abi == CRIS_ABI_V2)
- {
- set_gdbarch_double_bit (gdbarch, 64);
- set_gdbarch_deprecated_push_arguments (gdbarch, cris_abi_v2_push_arguments);
- set_gdbarch_deprecated_store_return_value (gdbarch, cris_abi_v2_store_return_value);
- set_gdbarch_deprecated_extract_return_value
- (gdbarch, cris_abi_v2_extract_return_value);
- set_gdbarch_reg_struct_has_addr (gdbarch,
- cris_abi_v2_reg_struct_has_addr);
- }
- else
- internal_error (__FILE__, __LINE__, "cris_gdbarch_init: unknown CRIS ABI");
+ set_gdbarch_return_value (gdbarch, cris_return_value);
+ set_gdbarch_deprecated_reg_struct_has_addr (gdbarch,
+ cris_reg_struct_has_addr);
+ set_gdbarch_deprecated_use_struct_convention (gdbarch, always_use_struct_convention);
- /* The default definition of a long double is 2 * TARGET_DOUBLE_BIT,
- which means we have to set this explicitly. */
- set_gdbarch_long_double_bit (gdbarch, 64);
-
- /* There are 32 registers (some of which may not be implemented). */
- set_gdbarch_num_regs (gdbarch, 32);
set_gdbarch_sp_regnum (gdbarch, 14);
- set_gdbarch_deprecated_fp_regnum (gdbarch, 8);
- set_gdbarch_pc_regnum (gdbarch, 15);
-
- set_gdbarch_register_name (gdbarch, cris_register_name);
-
- /* Length of ordinary registers used in push_word and a few other places.
- REGISTER_RAW_SIZE is the real way to know how big a register is. */
- set_gdbarch_deprecated_register_size (gdbarch, 4);
-
- /* NEW */
- set_gdbarch_register_bytes_ok (gdbarch, cris_register_bytes_ok);
- set_gdbarch_software_single_step (gdbarch, cris_software_single_step);
-
- set_gdbarch_cannot_store_register (gdbarch, cris_cannot_store_register);
- set_gdbarch_cannot_fetch_register (gdbarch, cris_cannot_fetch_register);
+ /* Length of ordinary registers used in push_word and a few other
+ places. register_size() is the real way to know how big a
+ register is. */
+ set_gdbarch_double_bit (gdbarch, 64);
+ /* The default definition of a long double is 2 * TARGET_DOUBLE_BIT,
+ which means we have to set this explicitly. */
+ set_gdbarch_long_double_bit (gdbarch, 64);
/* The total amount of space needed to store (in an array called registers)
GDB's copy of the machine's register state. Note: We can not use
case 1:
case 2:
case 3:
- /* Support for these may be added later. */
- internal_error (__FILE__, __LINE__, "cris_gdbarch_init: unsupported CRIS version");
- break;
-
case 8:
case 9:
- /* CRIS v8 and v9, a.k.a. ETRAX 100. General registers R0 - R15
- (32 bits), special registers P0 - P1 (8 bits), P4 - P5 (16 bits),
- and P8 - P14 (32 bits). */
- register_bytes = (16 * 4) + (2 * 1) + (2 * 2) + (7 * 4);
+ /* Old versions; not supported. */
+ internal_error (__FILE__, __LINE__,
+ _("cris_gdbarch_init: unsupported CRIS version"));
break;
case 10:
case 11:
/* CRIS v10 and v11, a.k.a. ETRAX 100LX. In addition to ETRAX 100,
P7 (32 bits), and P15 (32 bits) have been implemented. */
- register_bytes = (16 * 4) + (2 * 1) + (2 * 2) + (9 * 4);
+ set_gdbarch_pc_regnum (gdbarch, 15);
+ set_gdbarch_register_type (gdbarch, cris_register_type);
+ /* There are 32 registers (some of which may not be implemented). */
+ set_gdbarch_num_regs (gdbarch, 32);
+ set_gdbarch_register_name (gdbarch, cris_register_name);
+ set_gdbarch_cannot_store_register (gdbarch, cris_cannot_store_register);
+ set_gdbarch_cannot_fetch_register (gdbarch, cris_cannot_fetch_register);
+
+ set_gdbarch_software_single_step (gdbarch, cris_software_single_step);
break;
- default:
- internal_error (__FILE__, __LINE__, "cris_gdbarch_init: unknown CRIS version");
- }
+ case 32:
+ /* CRIS v32. General registers R0 - R15 (32 bits), special registers
+ P0 - P15 (32 bits) except P0, P1, P3 (8 bits) and P4 (16 bits)
+ and pseudo-register PC (32 bits). */
+ set_gdbarch_pc_regnum (gdbarch, 32);
+ set_gdbarch_register_type (gdbarch, crisv32_register_type);
+ /* 32 registers + pseudo-register PC + 16 support registers. */
+ set_gdbarch_num_regs (gdbarch, 32 + 1 + 16);
+ set_gdbarch_register_name (gdbarch, crisv32_register_name);
- set_gdbarch_deprecated_register_bytes (gdbarch, register_bytes);
+ set_gdbarch_cannot_store_register
+ (gdbarch, crisv32_cannot_store_register);
+ set_gdbarch_cannot_fetch_register
+ (gdbarch, crisv32_cannot_fetch_register);
- /* Returns the register offset for the first byte of register regno's space
- in the saved register state. */
- set_gdbarch_register_byte (gdbarch, cris_register_offset);
-
- /* The length of the registers in the actual machine representation. */
- set_gdbarch_register_raw_size (gdbarch, cris_register_size);
-
- /* The largest value REGISTER_RAW_SIZE can have. */
- set_gdbarch_deprecated_max_register_raw_size (gdbarch, 32);
-
- /* The length of the registers in the program's representation. */
- set_gdbarch_register_virtual_size (gdbarch, cris_register_size);
-
- /* The largest value REGISTER_VIRTUAL_SIZE can have. */
- set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 32);
+ set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
- set_gdbarch_register_virtual_type (gdbarch, cris_register_virtual_type);
-
- /* Use generic dummy frames. */
-
- /* Read all about dummy frames in blockframe.c. */
- set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point);
-
- /* Defined to 1 to indicate that the target supports inferior function
- calls. */
- set_gdbarch_deprecated_call_dummy_words (gdbarch, 0);
- set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, 0);
-
- set_gdbarch_deprecated_get_saved_register (gdbarch, deprecated_generic_get_saved_register);
-
- /* No register requires conversion from raw format to virtual format. */
- set_gdbarch_register_convertible (gdbarch, generic_register_convertible_not);
+ set_gdbarch_single_step_through_delay
+ (gdbarch, crisv32_single_step_through_delay);
- set_gdbarch_deprecated_push_return_address (gdbarch, cris_push_return_address);
- set_gdbarch_deprecated_pop_frame (gdbarch, cris_pop_frame);
+ break;
- set_gdbarch_deprecated_store_struct_return (gdbarch, cris_store_struct_return);
- set_gdbarch_deprecated_extract_struct_value_address
- (gdbarch, cris_extract_struct_value_address);
- set_gdbarch_use_struct_convention (gdbarch, cris_use_struct_convention);
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("cris_gdbarch_init: unknown CRIS version"));
+ }
- set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, cris_frame_init_saved_regs);
- set_gdbarch_deprecated_init_extra_frame_info (gdbarch, cris_init_extra_frame_info);
+ /* Dummy frame functions (shared between CRISv10 and CRISv32 since they
+ have the same ABI). */
+ set_gdbarch_push_dummy_code (gdbarch, cris_push_dummy_code);
+ set_gdbarch_push_dummy_call (gdbarch, cris_push_dummy_call);
+ set_gdbarch_frame_align (gdbarch, cris_frame_align);
set_gdbarch_skip_prologue (gdbarch, cris_skip_prologue);
- set_gdbarch_prologue_frameless_p (gdbarch, generic_prologue_frameless_p);
/* The stack grows downward. */
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
set_gdbarch_breakpoint_from_pc (gdbarch, cris_breakpoint_from_pc);
- /* The PC must not be decremented after a breakpoint. (The breakpoint
- handler takes care of that.) */
- set_gdbarch_decr_pc_after_break (gdbarch, 0);
-
- /* Offset from address of function to start of its code. */
- set_gdbarch_function_start_offset (gdbarch, 0);
-
- /* The number of bytes at the start of arglist that are not really args,
- 0 in the CRIS ABI. */
- set_gdbarch_frame_args_skip (gdbarch, 0);
- set_gdbarch_frameless_function_invocation
- (gdbarch, cris_frameless_function_invocation);
- set_gdbarch_deprecated_frame_chain (gdbarch, cris_frame_chain);
+ set_gdbarch_unwind_pc (gdbarch, cris_unwind_pc);
+ set_gdbarch_unwind_sp (gdbarch, cris_unwind_sp);
+ set_gdbarch_unwind_dummy_id (gdbarch, cris_unwind_dummy_id);
- set_gdbarch_deprecated_frame_saved_pc (gdbarch, cris_frame_saved_pc);
- set_gdbarch_deprecated_saved_pc_after_call (gdbarch, cris_saved_pc_after_call);
+ if (tdep->cris_dwarf2_cfi == 1)
+ {
+ /* Hook in the Dwarf-2 frame sniffer. */
+ set_gdbarch_dwarf2_reg_to_regnum (gdbarch, cris_dwarf2_reg_to_regnum);
+ dwarf2_frame_set_init_reg (gdbarch, cris_dwarf2_frame_init_reg);
+ frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+ }
- set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown);
-
- /* Helpful for backtracing and returning in a call dummy. */
- set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos);
+ if (tdep->cris_mode != cris_mode_guru)
+ {
+ frame_unwind_append_sniffer (gdbarch, cris_sigtramp_frame_sniffer);
+ }
- /* Should be using push_dummy_call. */
- set_gdbarch_deprecated_dummy_write_sp (gdbarch, generic_target_write_sp);
+ frame_unwind_append_sniffer (gdbarch, cris_frame_sniffer);
+ frame_base_set_default (gdbarch, &cris_frame_base);
- /* Use target_specific function to define link map offsets. */
- set_solib_svr4_fetch_link_map_offsets
- (gdbarch, cris_linux_svr4_fetch_link_map_offsets);
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ /* FIXME: cagney/2003-08-27: It should be possible to select a CRIS
+ disassembler, even when there is no BFD. Does something like
+ "gdb; target remote; disassmeble *0x123" work? */
+ set_gdbarch_print_insn (gdbarch, cris_delayed_get_disassembler);
+
return gdbarch;
}
projects / binutils.git / blobdiff