-/* Native-dependent code for NetBSD/i386, for GDB.
- Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001
- Free Software Foundation, Inc.
+/* Native-dependent code for NetBSD/i386.
+
+ Copyright (C) 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
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 <sys/types.h>
-#include <sys/ptrace.h>
-#include <machine/reg.h>
-#include <machine/frame.h>
-#include "inferior.h"
-#include "gdbcore.h" /* for registers_fetched() */
+#include "gdbcore.h"
#include "regcache.h"
+#include "target.h"
-#define RF(dst, src) \
- memcpy(®isters[REGISTER_BYTE(dst)], &src, sizeof(src))
-
-#define RS(src, dst) \
- memcpy(&dst, ®isters[REGISTER_BYTE(src)], sizeof(dst))
-
-struct env387
- {
- unsigned short control;
- unsigned short r0;
- unsigned short status;
- unsigned short r1;
- unsigned short tag;
- unsigned short r2;
- unsigned long eip;
- unsigned short code_seg;
- unsigned short opcode;
- unsigned long operand;
- unsigned short operand_seg;
- unsigned short r3;
- unsigned char regs[8][10];
- };
+#include "i386-tdep.h"
+#include "i386bsd-nat.h"
-void
-fetch_inferior_registers (int regno)
-{
- struct reg inferior_registers;
- struct env387 inferior_fpregisters;
-
- ptrace (PT_GETREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_registers, 0);
- ptrace (PT_GETFPREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
-
- RF ( 0, inferior_registers.r_eax);
- RF ( 1, inferior_registers.r_ecx);
- RF ( 2, inferior_registers.r_edx);
- RF ( 3, inferior_registers.r_ebx);
- RF ( 4, inferior_registers.r_esp);
- RF ( 5, inferior_registers.r_ebp);
- RF ( 6, inferior_registers.r_esi);
- RF ( 7, inferior_registers.r_edi);
- RF ( 8, inferior_registers.r_eip);
- RF ( 9, inferior_registers.r_eflags);
- RF (10, inferior_registers.r_cs);
- RF (11, inferior_registers.r_ss);
- RF (12, inferior_registers.r_ds);
- RF (13, inferior_registers.r_es);
- RF (14, inferior_registers.r_fs);
- RF (15, inferior_registers.r_gs);
-
- RF (FP0_REGNUM, inferior_fpregisters.regs[0]);
- RF (FP0_REGNUM + 1, inferior_fpregisters.regs[1]);
- RF (FP0_REGNUM + 2, inferior_fpregisters.regs[2]);
- RF (FP0_REGNUM + 3, inferior_fpregisters.regs[3]);
- RF (FP0_REGNUM + 4, inferior_fpregisters.regs[4]);
- RF (FP0_REGNUM + 5, inferior_fpregisters.regs[5]);
- RF (FP0_REGNUM + 6, inferior_fpregisters.regs[6]);
- RF (FP0_REGNUM + 7, inferior_fpregisters.regs[7]);
-
- RF (FCTRL_REGNUM, inferior_fpregisters.control);
- RF (FSTAT_REGNUM, inferior_fpregisters.status);
- RF (FTAG_REGNUM, inferior_fpregisters.tag);
- RF (FCS_REGNUM, inferior_fpregisters.code_seg);
- RF (FCOFF_REGNUM, inferior_fpregisters.eip);
- RF (FDS_REGNUM, inferior_fpregisters.operand_seg);
- RF (FDOFF_REGNUM, inferior_fpregisters.operand);
- RF (FOP_REGNUM, inferior_fpregisters.opcode);
-
- registers_fetched ();
-}
+/* Support for debugging kernel virtual memory images. */
-void
-store_inferior_registers (int regno)
-{
- struct reg inferior_registers;
- struct env387 inferior_fpregisters;
-
- RS ( 0, inferior_registers.r_eax);
- RS ( 1, inferior_registers.r_ecx);
- RS ( 2, inferior_registers.r_edx);
- RS ( 3, inferior_registers.r_ebx);
- RS ( 4, inferior_registers.r_esp);
- RS ( 5, inferior_registers.r_ebp);
- RS ( 6, inferior_registers.r_esi);
- RS ( 7, inferior_registers.r_edi);
- RS ( 8, inferior_registers.r_eip);
- RS ( 9, inferior_registers.r_eflags);
- RS (10, inferior_registers.r_cs);
- RS (11, inferior_registers.r_ss);
- RS (12, inferior_registers.r_ds);
- RS (13, inferior_registers.r_es);
- RS (14, inferior_registers.r_fs);
- RS (15, inferior_registers.r_gs);
-
-
- RS (FP0_REGNUM, inferior_fpregisters.regs[0]);
- RS (FP0_REGNUM + 1, inferior_fpregisters.regs[1]);
- RS (FP0_REGNUM + 2, inferior_fpregisters.regs[2]);
- RS (FP0_REGNUM + 3, inferior_fpregisters.regs[3]);
- RS (FP0_REGNUM + 4, inferior_fpregisters.regs[4]);
- RS (FP0_REGNUM + 5, inferior_fpregisters.regs[5]);
- RS (FP0_REGNUM + 6, inferior_fpregisters.regs[6]);
- RS (FP0_REGNUM + 7, inferior_fpregisters.regs[7]);
-
- RS (FCTRL_REGNUM, inferior_fpregisters.control);
- RS (FSTAT_REGNUM, inferior_fpregisters.status);
- RS (FTAG_REGNUM, inferior_fpregisters.tag);
- RS (FCS_REGNUM, inferior_fpregisters.code_seg);
- RS (FCOFF_REGNUM, inferior_fpregisters.eip);
- RS (FDS_REGNUM, inferior_fpregisters.operand_seg);
- RS (FDOFF_REGNUM, inferior_fpregisters.operand);
- RS (FOP_REGNUM, inferior_fpregisters.opcode);
-
- ptrace (PT_SETREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_registers, 0);
- ptrace (PT_SETFPREGS, inferior_pid,
- (PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
-}
-\f
-struct md_core
-{
- struct reg intreg;
- struct env387 freg;
-};
+#include <sys/types.h>
+#include <machine/frame.h>
+#include <machine/pcb.h>
+
+#include "bsd-kvm.h"
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
+static int
+i386nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
{
- struct md_core *core_reg = (struct md_core *) core_reg_sect;
-
- /* integer registers */
- memcpy (®isters[REGISTER_BYTE (0)], &core_reg->intreg,
- sizeof (struct reg));
-
- /* floating point registers */
- RF (FP0_REGNUM, core_reg->freg.regs[0]);
- RF (FP0_REGNUM + 1, core_reg->freg.regs[1]);
- RF (FP0_REGNUM + 2, core_reg->freg.regs[2]);
- RF (FP0_REGNUM + 3, core_reg->freg.regs[3]);
- RF (FP0_REGNUM + 4, core_reg->freg.regs[4]);
- RF (FP0_REGNUM + 5, core_reg->freg.regs[5]);
- RF (FP0_REGNUM + 6, core_reg->freg.regs[6]);
- RF (FP0_REGNUM + 7, core_reg->freg.regs[7]);
-
- RF (FCTRL_REGNUM, core_reg->freg.control);
- RF (FSTAT_REGNUM, core_reg->freg.status);
- RF (FTAG_REGNUM, core_reg->freg.tag);
- RF (FCS_REGNUM, core_reg->freg.code_seg);
- RF (FCOFF_REGNUM, core_reg->freg.eip);
- RF (FDS_REGNUM, core_reg->freg.operand_seg);
- RF (FDOFF_REGNUM, core_reg->freg.operand);
- RF (FOP_REGNUM, core_reg->freg.opcode);
-
- registers_fetched ();
+ struct switchframe sf;
+
+ /* The following is true for NetBSD 1.6.2:
+
+ The pcb contains %esp and %ebp at the point of the context switch
+ in cpu_switch(). At that point we have a stack frame as
+ described by `struct switchframe', which for NetBSD 1.6.2 has the
+ following layout:
+
+ interrupt level
+ %edi
+ %esi
+ %ebx
+ %eip
+
+ we reconstruct the register state as it would look when we just
+ returned from cpu_switch(). */
+
+ /* The stack pointer shouldn't be zero. */
+ if (pcb->pcb_esp == 0)
+ return 0;
+
+ read_memory (pcb->pcb_esp, (gdb_byte *)&sf, sizeof sf);
+ pcb->pcb_esp += sizeof (struct switchframe);
+ regcache_raw_supply (regcache, I386_EDI_REGNUM, &sf.sf_edi);
+ regcache_raw_supply (regcache, I386_ESI_REGNUM, &sf.sf_esi);
+ regcache_raw_supply (regcache, I386_EBP_REGNUM, &pcb->pcb_ebp);
+ regcache_raw_supply (regcache, I386_ESP_REGNUM, &pcb->pcb_esp);
+ regcache_raw_supply (regcache, I386_EBX_REGNUM, &sf.sf_ebx);
+ regcache_raw_supply (regcache, I386_EIP_REGNUM, &sf.sf_eip);
+
+ return 1;
}
+\f
-/* Register that we are able to handle i386nbsd core file formats.
- FIXME: is this really bfd_target_unknown_flavour? */
-
-static struct core_fns i386nbsd_core_fns =
-{
- bfd_target_unknown_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
-};
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_i386nbsd_nat (void);
void
_initialize_i386nbsd_nat (void)
{
- add_core_fns (&i386nbsd_core_fns);
+ /* We've got nothing to add to the common *BSD/i386 target. */
+ add_target (i386bsd_target ());
+
+ /* Support debugging kernel virtual memory images. */
+ bsd_kvm_add_target (i386nbsd_supply_pcb);
}
projects / binutils.git / blobdiff