/* Native support for the SGI Iris running IRIX version 5, for GDB.
- Copyright 1988, 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
+ Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
+ Free Software Foundation, Inc.
Implemented for Irix 4.x by Garrett A. Wollman.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "inferior.h"
#include "gdbcore.h"
#include "target.h"
+#include "gdb_string.h"
#include <sys/time.h>
#include <sys/procfs.h>
#include <setjmp.h> /* For JB_XXX. */
+static void
+fetch_core_registers PARAMS ((char *, unsigned int, int, CORE_ADDR));
+
/* Size of elements in jmpbuf */
#define JB_ELEMENT_SIZE 4
{
register int regi;
register greg_t *regp = &(*gregsetp)[0];
+ int gregoff = sizeof (greg_t) - MIPS_REGSIZE;
+ static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
for(regi = 0; regi <= CTX_RA; regi++)
- supply_register (regi, (char *)(regp + regi));
+ supply_register (regi, (char *)(regp + regi) + gregoff);
- supply_register (PC_REGNUM, (char *)(regp + CTX_EPC));
- supply_register (HI_REGNUM, (char *)(regp + CTX_MDHI));
- supply_register (LO_REGNUM, (char *)(regp + CTX_MDLO));
- supply_register (CAUSE_REGNUM, (char *)(regp + CTX_CAUSE));
+ supply_register (PC_REGNUM, (char *)(regp + CTX_EPC) + gregoff);
+ supply_register (HI_REGNUM, (char *)(regp + CTX_MDHI) + gregoff);
+ supply_register (LO_REGNUM, (char *)(regp + CTX_MDLO) + gregoff);
+ supply_register (CAUSE_REGNUM, (char *)(regp + CTX_CAUSE) + gregoff);
+
+ /* Fill inaccessible registers with zero. */
+ supply_register (BADVADDR_REGNUM, zerobuf);
}
void
int regi;
register greg_t *regp = &(*gregsetp)[0];
+ /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32
+ executable, we have to sign extend the registers to 64 bits before
+ filling in the gregset structure. */
+
for (regi = 0; regi <= CTX_RA; regi++)
if ((regno == -1) || (regno == regi))
- *(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)];
+ *(regp + regi) =
+ extract_signed_integer (®isters[REGISTER_BYTE (regi)],
+ REGISTER_RAW_SIZE (regi));
if ((regno == -1) || (regno == PC_REGNUM))
- *(regp + CTX_EPC) = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)];
+ *(regp + CTX_EPC) =
+ extract_signed_integer (®isters[REGISTER_BYTE (PC_REGNUM)],
+ REGISTER_RAW_SIZE (PC_REGNUM));
if ((regno == -1) || (regno == CAUSE_REGNUM))
- *(regp + CTX_CAUSE) = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)];
+ *(regp + CTX_CAUSE) =
+ extract_signed_integer (®isters[REGISTER_BYTE (CAUSE_REGNUM)],
+ REGISTER_RAW_SIZE (CAUSE_REGNUM));
if ((regno == -1) || (regno == HI_REGNUM))
- *(regp + CTX_MDHI) = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)];
+ *(regp + CTX_MDHI) =
+ extract_signed_integer (®isters[REGISTER_BYTE (HI_REGNUM)],
+ REGISTER_RAW_SIZE (HI_REGNUM));
if ((regno == -1) || (regno == LO_REGNUM))
- *(regp + CTX_MDLO) = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)];
+ *(regp + CTX_MDLO) =
+ extract_signed_integer (®isters[REGISTER_BYTE (LO_REGNUM)],
+ REGISTER_RAW_SIZE (LO_REGNUM));
}
/*
fpregset_t *fpregsetp;
{
register int regi;
+ static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
+
+ /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
for (regi = 0; regi < 32; regi++)
supply_register (FP0_REGNUM + regi,
supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
/* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
+ supply_register (FCRIR_REGNUM, zerobuf);
}
void
int regi;
char *from, *to;
+ /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
+
for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
{
if ((regno == -1) || (regno == regi))
return 1;
}
-void
+static void
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
char *core_reg_sect;
unsigned core_reg_size;
int which; /* Unused */
- unsigned int reg_addr; /* Unused */
+ CORE_ADDR reg_addr; /* Unused */
{
- if (core_reg_size != REGISTER_BYTES)
+ if (core_reg_size == REGISTER_BYTES)
+ {
+ memcpy ((char *)registers, core_reg_sect, core_reg_size);
+ }
+ else if (core_reg_size == (2 * REGISTER_BYTES) && MIPS_REGSIZE == 4)
+ {
+ /* This is a core file from a N32 executable, 64 bits are saved
+ for all registers. */
+ char *srcp = core_reg_sect;
+ char *dstp = registers;
+ int regno;
+
+ for (regno = 0; regno < NUM_REGS; regno++)
+ {
+ if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32))
+ {
+ /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB
+ currently assumes that they are 32 bit. */
+ *dstp++ = *srcp++;
+ *dstp++ = *srcp++;
+ *dstp++ = *srcp++;
+ *dstp++ = *srcp++;
+ srcp += 4;
+ }
+ else
+ {
+ srcp += 4;
+ *dstp++ = *srcp++;
+ *dstp++ = *srcp++;
+ *dstp++ = *srcp++;
+ *dstp++ = *srcp++;
+ }
+ }
+ }
+ else
{
warning ("wrong size gregset struct in core file");
return;
}
- memcpy ((char *)registers, core_reg_sect, core_reg_size);
+ registers_fetched ();
}
\f
/* Irix 5 uses what appears to be a unique form of shared library
support. This is a copy of solib.c modified for Irix 5. */
+/* FIXME: Most of this code could be merged with osfsolib.c and solib.c
+ by using next_link_map_member and xfer_link_map_member in solib.c. */
#include <sys/types.h>
#include <signal.h>
-#include <string.h>
#include <sys/param.h>
#include <fcntl.h>
#define __SYM_H__
#define __SYMCONST_H__
#include <obj.h>
+#ifdef HAVE_OBJLIST_H
+#include <objlist.h>
+#endif
+
+#ifdef NEW_OBJ_INFO_MAGIC
+#define HANDLE_NEW_OBJ_LIST
+#endif
#include "symtab.h"
#include "bfd.h"
#include "objfiles.h"
#include "command.h"
#include "frame.h"
-#include "regex.h"
+#include "gnu-regex.h"
#include "inferior.h"
#include "language.h"
+#include "gdbcmd.h"
-/* We need to set a breakpoint at a point when we know that the
- mapping of shared libraries is complete. dbx simply breaks at main
- (or, for FORTRAN, MAIN__), so we do the same. We can not break at
- the very beginning of main, because the startup code will jump into
- main after the GP initialization instructions. SOLIB_BKPT_OFFSET
- is used to skip those instructions. */
+/* The symbol which starts off the list of shared libraries. */
+#define DEBUG_BASE "__rld_obj_head"
-#define SOLIB_BKPT_OFFSET 12
+/* Irix 6.x introduces a new variant of object lists.
+ To be able to debug O32 executables under Irix 6, we have to handle both
+ variants. */
-static char *bkpt_names[] = {
- "main",
- "MAIN__",
- NULL
+typedef enum
+{
+ OBJ_LIST_OLD, /* Pre Irix 6.x object list. */
+ OBJ_LIST_32, /* 32 Bit Elf32_Obj_Info. */
+ OBJ_LIST_64 /* 64 Bit Elf64_Obj_Info, FIXME not yet implemented. */
+} obj_list_variant;
+
+/* Define our own link_map structure.
+ This will help to share code with osfsolib.c and solib.c. */
+
+struct link_map {
+ obj_list_variant l_variant; /* which variant of object list */
+ CORE_ADDR l_lladdr; /* addr in inferior list was read from */
+ CORE_ADDR l_next; /* address of next object list entry */
};
-/* The symbol which starts off the list of shared libraries. */
-#define DEBUG_BASE "__rld_obj_head"
-
-/* How to get the loaded address of a shared library. */
-#define LM_ADDR(so) ((so)->lm.o_base_address)
+/* Irix 5 shared objects are pre-linked to particular addresses
+ although the dynamic linker may have to relocate them if the
+ address ranges of the libraries used by the main program clash.
+ The offset is the difference between the address where the object
+ is mapped and the binding address of the shared library. */
+#define LM_OFFSET(so) ((so) -> offset)
+/* Loaded address of shared library. */
+#define LM_ADDR(so) ((so) -> lmstart)
char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */
-extern CORE_ADDR sigtramp_address, sigtramp_end;
-
struct so_list {
struct so_list *next; /* next structure in linked list */
- struct obj_list ll;
- struct obj lm; /* copy of link map from inferior */
- struct obj_list *lladdr; /* addr in inferior lm was read from */
+ struct link_map lm;
+ CORE_ADDR offset; /* prelink to load address offset */
+ char *so_name; /* shared object lib name */
+ CORE_ADDR lmstart; /* lower addr bound of mapped object */
CORE_ADDR lmend; /* upper addr bound of mapped object */
char symbols_loaded; /* flag: symbols read in yet? */
char from_tty; /* flag: print msgs? */
static struct so_list *
find_solib PARAMS ((struct so_list *));
-static struct obj_list *
+static struct link_map *
first_link_map_member PARAMS ((void));
+static struct link_map *
+next_link_map_member PARAMS ((struct so_list *));
+
+static void
+xfer_link_map_member PARAMS ((struct so_list *, struct link_map *));
+
static CORE_ADDR
locate_base PARAMS ((void));
struct cleanup *old_chain;
bfd *abfd;
- filename = tilde_expand (so -> lm.o_path);
+ filename = tilde_expand (so -> so_name);
old_chain = make_cleanup (free, filename);
scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
for (p = so -> sections; p < so -> sections_end; p++)
{
/* Relocate the section binding addresses as recorded in the shared
- object's file by the base address to which the object was actually
- mapped. */
- p -> addr += (CORE_ADDR) LM_ADDR (so);
- p -> endaddr += (CORE_ADDR) LM_ADDR (so);
+ object's file by the offset to get the address to which the
+ object was actually mapped. */
+ p -> addr += LM_OFFSET (so);
+ p -> endaddr += LM_OFFSET (so);
so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend);
if (STREQ (p -> the_bfd_section -> name, ".text"))
{
struct minimal_symbol *msymbol;
CORE_ADDR address = 0;
- msymbol = lookup_minimal_symbol (DEBUG_BASE, symfile_objfile);
+ msymbol = lookup_minimal_symbol (DEBUG_BASE, NULL, symfile_objfile);
if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
{
address = SYMBOL_VALUE_ADDRESS (msymbol);
Read in a copy of the first member in the inferior's dynamic
link map from the inferior's dynamic linker structures, and return
- a pointer to the copy in our address space.
+ a pointer to the link map descriptor.
*/
-static struct obj_list *
+static struct link_map *
first_link_map_member ()
{
- struct obj_list *lm;
- struct obj_list s;
+ struct obj_list *listp;
+ struct obj_list list_old;
+ struct link_map *lm;
+ static struct link_map first_lm;
+ CORE_ADDR lladdr;
+ CORE_ADDR next_lladdr;
+
+ /* We have not already read in the dynamic linking structures
+ from the inferior, lookup the address of the base structure. */
+ debug_base = locate_base ();
+ if (debug_base == 0)
+ return NULL;
- read_memory (debug_base, (char *) &lm, sizeof (struct obj_list *));
+ /* Get address of first list entry. */
+ read_memory (debug_base, (char *) &listp, sizeof (struct obj_list *));
- if (lm == NULL)
+ if (listp == NULL)
return NULL;
+ /* Get first list entry. */
+ lladdr = (CORE_ADDR) listp;
+ read_memory (lladdr, (char *) &list_old, sizeof (struct obj_list));
+
/* The first entry in the list is the object file we are debugging,
so skip it. */
- read_memory ((CORE_ADDR) lm, (char *) &s, sizeof (struct obj_list));
+ next_lladdr = (CORE_ADDR) list_old.next;
+
+#ifdef HANDLE_NEW_OBJ_LIST
+ if (list_old.data == NEW_OBJ_INFO_MAGIC)
+ {
+ Elf32_Obj_Info list_32;
+
+ read_memory (lladdr, (char *) &list_32, sizeof (Elf32_Obj_Info));
+ if (list_32.oi_size != sizeof (Elf32_Obj_Info))
+ return NULL;
+ next_lladdr = (CORE_ADDR) list_32.oi_next;
+ }
+#endif
+
+ if (next_lladdr == 0)
+ return NULL;
- return s.next;
+ first_lm.l_lladdr = next_lladdr;
+ lm = &first_lm;
+ return lm;
}
+/*
+
+LOCAL FUNCTION
+
+ next_link_map_member -- locate next member in dynamic linker's map
+
+SYNOPSIS
+
+ static struct link_map *next_link_map_member (so_list_ptr)
+
+DESCRIPTION
+
+ Read in a copy of the next member in the inferior's dynamic
+ link map from the inferior's dynamic linker structures, and return
+ a pointer to the link map descriptor.
+*/
+
+static struct link_map *
+next_link_map_member (so_list_ptr)
+ struct so_list *so_list_ptr;
+{
+ struct link_map *lm = &so_list_ptr -> lm;
+ CORE_ADDR next_lladdr = lm -> l_next;
+ static struct link_map next_lm;
+
+ if (next_lladdr == 0)
+ {
+ /* We have hit the end of the list, so check to see if any were
+ added, but be quiet if we can't read from the target any more. */
+ int status = 0;
+
+ if (lm -> l_variant == OBJ_LIST_OLD)
+ {
+ struct obj_list list_old;
+
+ status = target_read_memory (lm -> l_lladdr,
+ (char *) &list_old,
+ sizeof (struct obj_list));
+ next_lladdr = (CORE_ADDR) list_old.next;
+ }
+#ifdef HANDLE_NEW_OBJ_LIST
+ else if (lm -> l_variant == OBJ_LIST_32)
+ {
+ Elf32_Obj_Info list_32;
+ status = target_read_memory (lm -> l_lladdr,
+ (char *) &list_32,
+ sizeof (Elf32_Obj_Info));
+ next_lladdr = (CORE_ADDR) list_32.oi_next;
+ }
+#endif
+
+ if (status != 0 || next_lladdr == 0)
+ return NULL;
+ }
+
+ next_lm.l_lladdr = next_lladdr;
+ lm = &next_lm;
+ return lm;
+}
+
+/*
+
+LOCAL FUNCTION
+
+ xfer_link_map_member -- set local variables from dynamic linker's map
+
+SYNOPSIS
+
+ static void xfer_link_map_member (so_list_ptr, lm)
+
+DESCRIPTION
+
+ Read in a copy of the requested member in the inferior's dynamic
+ link map from the inferior's dynamic linker structures, and fill
+ in the necessary so_list_ptr elements.
+*/
+
+static void
+xfer_link_map_member (so_list_ptr, lm)
+ struct so_list *so_list_ptr;
+ struct link_map *lm;
+{
+ struct obj_list list_old;
+ CORE_ADDR lladdr = lm -> l_lladdr;
+ struct link_map *new_lm = &so_list_ptr -> lm;
+ int errcode;
+
+ read_memory (lladdr, (char *) &list_old, sizeof (struct obj_list));
+
+ new_lm -> l_variant = OBJ_LIST_OLD;
+ new_lm -> l_lladdr = lladdr;
+ new_lm -> l_next = (CORE_ADDR) list_old.next;
+
+#ifdef HANDLE_NEW_OBJ_LIST
+ if (list_old.data == NEW_OBJ_INFO_MAGIC)
+ {
+ Elf32_Obj_Info list_32;
+
+ read_memory (lladdr, (char *) &list_32, sizeof (Elf32_Obj_Info));
+ if (list_32.oi_size != sizeof (Elf32_Obj_Info))
+ return;
+ new_lm -> l_variant = OBJ_LIST_32;
+ new_lm -> l_next = (CORE_ADDR) list_32.oi_next;
+
+ target_read_string ((CORE_ADDR) list_32.oi_pathname,
+ &so_list_ptr -> so_name,
+ list_32.oi_pathname_len + 1, &errcode);
+ if (errcode != 0)
+ memory_error (errcode, (CORE_ADDR) list_32.oi_pathname);
+
+ LM_ADDR (so_list_ptr) = (CORE_ADDR) list_32.oi_ehdr;
+ LM_OFFSET (so_list_ptr) =
+ (CORE_ADDR) list_32.oi_ehdr - (CORE_ADDR) list_32.oi_orig_ehdr;
+ }
+ else
+#endif
+ {
+#if defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32
+ /* If we are compiling GDB under N32 ABI, the alignments in
+ the obj struct are different from the O32 ABI and we will get
+ wrong values when accessing the struct.
+ As a workaround we use fixed values which are good for
+ Irix 6.2. */
+ char buf[432];
+
+ read_memory ((CORE_ADDR) list_old.data, buf, sizeof (buf));
+
+ target_read_string (extract_address (&buf[236], 4),
+ &so_list_ptr -> so_name,
+ INT_MAX, &errcode);
+ if (errcode != 0)
+ memory_error (errcode, extract_address (&buf[236], 4));
+
+ LM_ADDR (so_list_ptr) = extract_address (&buf[196], 4);
+ LM_OFFSET (so_list_ptr) =
+ extract_address (&buf[196], 4) - extract_address (&buf[248], 4);
+#else
+ struct obj obj_old;
+
+ read_memory ((CORE_ADDR) list_old.data, (char *) &obj_old,
+ sizeof (struct obj));
+
+ target_read_string ((CORE_ADDR) obj_old.o_path,
+ &so_list_ptr -> so_name,
+ INT_MAX, &errcode);
+ if (errcode != 0)
+ memory_error (errcode, (CORE_ADDR) obj_old.o_path);
+
+ LM_ADDR (so_list_ptr) = (CORE_ADDR) obj_old.o_praw;
+ LM_OFFSET (so_list_ptr) =
+ (CORE_ADDR) obj_old.o_praw - obj_old.o_base_address;
+#endif
+ }
+
+ solib_map_sections (so_list_ptr);
+}
+
+
/*
LOCAL FUNCTION
struct so_list *so_list_ptr; /* Last lm or NULL for first one */
{
struct so_list *so_list_next = NULL;
- struct obj_list *lm = NULL;
+ struct link_map *lm = NULL;
struct so_list *new;
if (so_list_ptr == NULL)
/* We are setting up for a new scan through the loaded images. */
if ((so_list_next = so_list_head) == NULL)
{
- /* We have not already read in the dynamic linking structures
- from the inferior, lookup the address of the base structure. */
- debug_base = locate_base ();
- if (debug_base != 0)
- {
- /* Read the base structure in and find the address of the first
- link map list member. */
- lm = first_link_map_member ();
- }
+ /* Find the first link map list member. */
+ lm = first_link_map_member ();
}
}
else
{
/* We have been called before, and are in the process of walking
the shared library list. Advance to the next shared object. */
- if ((lm = so_list_ptr->ll.next) == NULL)
- {
- /* We have hit the end of the list, so check to see if any were
- added, but be quiet if we can't read from the target any more. */
- int status = target_read_memory ((CORE_ADDR) so_list_ptr -> lladdr,
- (char *) &(so_list_ptr -> ll),
- sizeof (struct obj_list));
- if (status == 0)
- {
- lm = so_list_ptr->ll.next;
- }
- else
- {
- lm = NULL;
- }
- }
+ lm = next_link_map_member (so_list_ptr);
so_list_next = so_list_ptr -> next;
}
if ((so_list_next == NULL) && (lm != NULL))
{
- int errcode;
- char *buffer;
-
- /* Get next link map structure from inferior image and build a local
- abbreviated load_map structure */
new = (struct so_list *) xmalloc (sizeof (struct so_list));
memset ((char *) new, 0, sizeof (struct so_list));
- new -> lladdr = lm;
/* Add the new node as the next node in the list, or as the root
node if this is the first one. */
if (so_list_ptr != NULL)
so_list_head = new;
}
so_list_next = new;
- read_memory ((CORE_ADDR) lm, (char *) &(new -> ll),
- sizeof (struct obj_list));
- read_memory ((CORE_ADDR) new->ll.data, (char *) &(new -> lm),
- sizeof (struct obj));
- target_read_string ((CORE_ADDR)new->lm.o_path, &buffer,
- INT_MAX, &errcode);
- if (errcode != 0)
- memory_error (errcode, (CORE_ADDR)new->lm.o_path);
- new->lm.o_path = buffer;
- solib_map_sections (new);
+ xfer_link_map_member (new, lm);
}
return (so_list_next);
}
char *arg;
{
register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
+ CORE_ADDR text_addr = 0;
+
+ if (so -> textsection)
+ text_addr = so -> textsection -> addr;
+ else
+ {
+ asection *lowest_sect;
+
+ /* If we didn't find a mapped non zero sized .text section, set up
+ text_addr so that the relocation in symbol_file_add does no harm. */
+
+ lowest_sect = bfd_get_section_by_name (so -> abfd, ".text");
+ if (lowest_sect == NULL)
+ bfd_map_over_sections (so -> abfd, find_lowest_section,
+ (PTR) &lowest_sect);
+ if (lowest_sect)
+ text_addr = bfd_section_vma (so -> abfd, lowest_sect) + LM_OFFSET (so);
+ }
- so -> objfile = symbol_file_add (so -> lm.o_path, so -> from_tty,
- (unsigned int) so -> textsection -> addr,
+ so -> objfile = symbol_file_add (so -> so_name, so -> from_tty,
+ text_addr,
0, 0, 0);
return (1);
}
error ("Invalid regexp: %s", re_err);
}
- /* Getting new symbols may change our opinion about what is
- frameless. */
- reinit_frame_cache ();
- /* Not to mention where _sigtramp is. */
- sigtramp_address = 0;
-
- while ((so = find_solib (so)) != NULL)
- {
- if (so -> lm.o_path[0] && re_exec (so -> lm.o_path))
- {
- so -> from_tty = from_tty;
- if (so -> symbols_loaded)
- {
- if (from_tty)
- {
- printf_unfiltered ("Symbols already loaded for %s\n", so -> lm.o_path);
- }
- }
- else if (catch_errors
- (symbol_add_stub, (char *) so,
- "Error while reading shared library symbols:\n",
- RETURN_MASK_ALL))
- {
- so_last = so;
- so -> symbols_loaded = 1;
- }
- }
- }
-
- /* Now add the shared library sections to the section table of the
+ /* Add the shared library sections to the section table of the
specified target, if any. */
if (target)
{
count = 0;
while ((so = find_solib (so)) != NULL)
{
- if (so -> lm.o_path[0])
+ if (so -> so_name[0])
{
count += so -> sections_end - so -> sections;
}
if (count)
{
+ int update_coreops;
+
+ /* We must update the to_sections field in the core_ops structure
+ here, otherwise we dereference a potential dangling pointer
+ for each call to target_read/write_memory within this routine. */
+ update_coreops = core_ops.to_sections == target->to_sections;
+
/* Reallocate the target's section table including the new size. */
if (target -> to_sections)
{
}
target -> to_sections_end = target -> to_sections + (count + old);
+ /* Update the to_sections field in the core_ops structure
+ if needed. */
+ if (update_coreops)
+ {
+ core_ops.to_sections = target->to_sections;
+ core_ops.to_sections_end = target->to_sections_end;
+ }
+
/* Add these section table entries to the target's table. */
while ((so = find_solib (so)) != NULL)
{
- if (so -> lm.o_path[0])
+ if (so -> so_name[0])
{
count = so -> sections_end - so -> sections;
memcpy ((char *) (target -> to_sections + old),
}
}
}
+
+ /* Now add the symbol files. */
+ while ((so = find_solib (so)) != NULL)
+ {
+ if (so -> so_name[0] && re_exec (so -> so_name))
+ {
+ so -> from_tty = from_tty;
+ if (so -> symbols_loaded)
+ {
+ if (from_tty)
+ {
+ printf_unfiltered ("Symbols already loaded for %s\n", so -> so_name);
+ }
+ }
+ else if (catch_errors
+ (symbol_add_stub, (char *) so,
+ "Error while reading shared library symbols:\n",
+ RETURN_MASK_ALL))
+ {
+ so_last = so;
+ so -> symbols_loaded = 1;
+ }
+ }
+ }
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+ if (so_last)
+ reinit_frame_cache ();
}
/*
}
while ((so = find_solib (so)) != NULL)
{
- if (so -> lm.o_path[0])
+ if (so -> so_name[0])
{
if (!header_done)
{
local_hex_string_custom ((unsigned long) so -> lmend,
"08l"));
printf_unfiltered ("%-12s", so -> symbols_loaded ? "Yes" : "No");
- printf_unfiltered ("%s\n", so -> lm.o_path);
+ printf_unfiltered ("%s\n", so -> so_name);
}
}
if (so_list_head == NULL)
SYNOPSIS
- int solib_address (CORE_ADDR address)
+ char *solib_address (CORE_ADDR address)
DESCRIPTION
mapped in.
*/
-int
+char *
solib_address (address)
CORE_ADDR address;
{
while ((so = find_solib (so)) != NULL)
{
- if (so -> lm.o_path[0])
+ if (so -> so_name[0])
{
- if ((address >= (CORE_ADDR) so->lm.o_base_address) &&
+ if ((address >= (CORE_ADDR) LM_ADDR (so)) &&
(address < (CORE_ADDR) so -> lmend))
- {
- return (1);
- }
+ return (so->so_name);
}
}
return (0);
if (so_list_head -> abfd)
{
bfd_filename = bfd_get_filename (so_list_head -> abfd);
- bfd_close (so_list_head -> abfd);
+ if (!bfd_close (so_list_head -> abfd))
+ warning ("cannot close \"%s\": %s",
+ bfd_filename, bfd_errmsg (bfd_get_error ()));
}
else
/* This happens for the executable on SVR4. */
next = so_list_head -> next;
if (bfd_filename)
free ((PTR)bfd_filename);
- free (so_list_head->lm.o_path);
+ free (so_list_head->so_name);
free ((PTR)so_list_head);
so_list_head = next;
}
DESCRIPTION
- Both the SunOS and the SVR4 dynamic linkers have, as part of their
- debugger interface, support for arranging for the inferior to hit
- a breakpoint after mapping in the shared libraries. This function
- enables that breakpoint.
-
- For SunOS, there is a special flag location (in_debugger) which we
- set to 1. When the dynamic linker sees this flag set, it will set
- a breakpoint at a location known only to itself, after saving the
- original contents of that place and the breakpoint address itself,
- in it's own internal structures. When we resume the inferior, it
- will eventually take a SIGTRAP when it runs into the breakpoint.
- We handle this (in a different place) by restoring the contents of
- the breakpointed location (which is only known after it stops),
- chasing around to locate the shared libraries that have been
- loaded, then resuming.
-
- For SVR4, the debugger interface structure contains a member (r_brk)
- which is statically initialized at the time the shared library is
- built, to the offset of a function (_r_debug_state) which is guaran-
- teed to be called once before mapping in a library, and again when
- the mapping is complete. At the time we are examining this member,
- it contains only the unrelocated offset of the function, so we have
- to do our own relocation. Later, when the dynamic linker actually
- runs, it relocates r_brk to be the actual address of _r_debug_state().
-
- The debugger interface structure also contains an enumeration which
- is set to either RT_ADD or RT_DELETE prior to changing the mapping,
- depending upon whether or not the library is being mapped or unmapped,
- and then set to RT_CONSISTENT after the library is mapped/unmapped.
-
- Irix 5, on the other hand, has no such features. Instead, we
- set a breakpoint at main.
+ This functions inserts a breakpoint at the entry point of the
+ main executable, where all shared libraries are mapped in.
*/
static int
enable_break ()
{
- int success = 0;
- struct minimal_symbol *msymbol;
- char **bkpt_namep;
- CORE_ADDR bkpt_addr;
-
- /* Scan through the list of symbols, trying to look up the symbol and
- set a breakpoint there. Terminate loop when we/if we succeed. */
-
- breakpoint_addr = 0;
- for (bkpt_namep = bkpt_names; *bkpt_namep != NULL; bkpt_namep++)
+ if (symfile_objfile != NULL
+ && target_insert_breakpoint (symfile_objfile->ei.entry_point,
+ shadow_contents) == 0)
{
- msymbol = lookup_minimal_symbol (*bkpt_namep, symfile_objfile);
- if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
- {
- bkpt_addr = SYMBOL_VALUE_ADDRESS (msymbol);
-#ifdef SOLIB_BKPT_OFFSET
- /* We only want to skip if bkpt_addr is currently pointing
- at a GP setting instruction. */
- {
- char buf[4];
-
- if (target_read_memory (bkpt_addr, buf, 4) == 0)
- {
- unsigned long insn;
-
- insn = extract_unsigned_integer (buf, 4);
- if ((insn & 0xffff0000) == 0x3c1c0000) /* lui $gp,n */
- bkpt_addr += SOLIB_BKPT_OFFSET;
- }
- }
-#endif
- if (target_insert_breakpoint (bkpt_addr, shadow_contents) == 0)
- {
- breakpoint_addr = bkpt_addr;
- success = 1;
- break;
- }
- }
+ breakpoint_addr = symfile_objfile->ei.entry_point;
+ return 1;
}
- return (success);
+ return 0;
}
/*
clear_proceed_status ();
stop_soon_quietly = 1;
- stop_signal = 0;
+ stop_signal = TARGET_SIGNAL_0;
do
{
target_resume (-1, 0, stop_signal);
wait_for_inferior ();
}
- while (stop_signal != SIGTRAP);
- stop_soon_quietly = 0;
+ while (stop_signal != TARGET_SIGNAL_TRAP);
/* We are now either at the "mapping complete" breakpoint (or somewhere
else, a condition we aren't prepared to deal with anyway), so adjust
warning ("shared library handler failed to disable breakpoint");
}
- solib_add ((char *) 0, 0, (struct target_ops *) 0);
+ /* solib_add will call reinit_frame_cache.
+ But we are stopped in the startup code and we might not have symbols
+ for the startup code, so heuristic_proc_start could be called
+ and will put out an annoying warning.
+ Delaying the resetting of stop_soon_quietly until after symbol loading
+ suppresses the warning. */
+ if (auto_solib_add)
+ solib_add ((char *) 0, 0, (struct target_ops *) 0);
+ stop_soon_quietly = 0;
}
/*
void
_initialize_solib()
{
-
add_com ("sharedlibrary", class_files, sharedlibrary_command,
"Load shared object library symbols for files matching REGEXP.");
add_info ("sharedlibrary", info_sharedlibrary_command,
"Status of loaded shared object libraries.");
+
+ add_show_from_set
+ (add_set_cmd ("auto-solib-add", class_support, var_zinteger,
+ (char *) &auto_solib_add,
+ "Set autoloading of shared library symbols.\n\
+If nonzero, symbols from all shared object libraries will be loaded\n\
+automatically when the inferior begins execution or when the dynamic linker\n\
+informs gdb that a new library has been loaded. Otherwise, symbols\n\
+must be loaded manually, using `sharedlibrary'.",
+ &setlist),
+ &showlist);
+}
+
+\f
+/* Register that we are able to handle irix5 core file formats.
+ This really is bfd_target_unknown_flavour */
+
+static struct core_fns irix5_core_fns =
+{
+ bfd_target_unknown_flavour,
+ fetch_core_registers,
+ NULL
+};
+
+void
+_initialize_core_irix5 ()
+{
+ add_core_fns (&irix5_core_fns);
}
projects / binutils.git / blobdiff