/* Native support for the SGI Iris running IRIX version 5, for GDB.
- Copyright 1988, 89, 90, 91, 92, 93, 94, 95, 96, 98, 1999
+
+ Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
+ 1999, 2000, 2001, 2002, 2004, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
+
Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
Implemented for Irix 4.x by Garrett A. Wollman.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
#include "gdbcore.h"
#include "target.h"
+#include "regcache.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));
+/* Prototypes for supply_gregset etc. */
+#include "gregset.h"
+#include "mips-tdep.h"
-/* Size of elements in jmpbuf */
+static void fetch_core_registers (struct regcache *, char *,
+ unsigned int, int, CORE_ADDR);
-#define JB_ELEMENT_SIZE 4
/*
* See the comment in m68k-tdep.c regarding the utility of these functions.
*/
void
-supply_gregset (gregsetp)
- gregset_t *gregsetp;
+supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
{
- register int regi;
- register greg_t *regp = &(*gregsetp)[0];
- int gregoff = sizeof (greg_t) - MIPS_REGSIZE;
- static char zerobuf[MAX_REGISTER_RAW_SIZE] =
- {0};
+ int regi;
+ const greg_t *regp = &(*gregsetp)[0];
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ int gregoff = sizeof (greg_t) - mips_isa_regsize (gdbarch);
+ static char zerobuf[32] = {0};
for (regi = 0; regi <= CTX_RA; regi++)
- supply_register (regi, (char *) (regp + regi) + gregoff);
-
- 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);
+ regcache_raw_supply (regcache, regi,
+ (const char *) (regp + regi) + gregoff);
+
+ regcache_raw_supply (regcache, mips_regnum (gdbarch)->pc,
+ (const char *) (regp + CTX_EPC) + gregoff);
+ regcache_raw_supply (regcache, mips_regnum (gdbarch)->hi,
+ (const char *) (regp + CTX_MDHI) + gregoff);
+ regcache_raw_supply (regcache, mips_regnum (gdbarch)->lo,
+ (const char *) (regp + CTX_MDLO) + gregoff);
+ regcache_raw_supply (regcache, mips_regnum (gdbarch)->cause,
+ (const char *) (regp + CTX_CAUSE) + gregoff);
/* Fill inaccessible registers with zero. */
- supply_register (BADVADDR_REGNUM, zerobuf);
+ regcache_raw_supply (regcache, mips_regnum (gdbarch)->badvaddr, zerobuf);
}
void
-fill_gregset (gregsetp, regno)
- gregset_t *gregsetp;
- int regno;
+fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno)
{
- int regi;
- register greg_t *regp = &(*gregsetp)[0];
+ int regi, size;
+ greg_t *regp = &(*gregsetp)[0];
+ gdb_byte buf[MAX_REGISTER_SIZE];
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
/* 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
for (regi = 0; regi <= CTX_RA; regi++)
if ((regno == -1) || (regno == regi))
- *(regp + regi) =
- extract_signed_integer (®isters[REGISTER_BYTE (regi)],
- REGISTER_RAW_SIZE (regi));
+ {
+ size = register_size (gdbarch, regi);
+ regcache_raw_collect (regcache, regi, buf);
+ *(regp + regi) = extract_signed_integer (buf, size);
+ }
- if ((regno == -1) || (regno == PC_REGNUM))
- *(regp + CTX_EPC) =
- extract_signed_integer (®isters[REGISTER_BYTE (PC_REGNUM)],
- REGISTER_RAW_SIZE (PC_REGNUM));
+ if ((regno == -1) || (regno == gdbarch_pc_regnum (gdbarch)))
+ {
+ regi = mips_regnum (gdbarch)->pc;
+ size = register_size (gdbarch, regi);
+ regcache_raw_collect (regcache, regi, buf);
+ *(regp + CTX_EPC) = extract_signed_integer (buf, size);
+ }
- if ((regno == -1) || (regno == CAUSE_REGNUM))
- *(regp + CTX_CAUSE) =
- extract_signed_integer (®isters[REGISTER_BYTE (CAUSE_REGNUM)],
- REGISTER_RAW_SIZE (CAUSE_REGNUM));
+ if ((regno == -1) || (regno == mips_regnum (gdbarch)->cause))
+ {
+ regi = mips_regnum (gdbarch)->cause;
+ size = register_size (gdbarch, regi);
+ regcache_raw_collect (regcache, regi, buf);
+ *(regp + CTX_CAUSE) = extract_signed_integer (buf, size);
+ }
- if ((regno == -1) || (regno == HI_REGNUM))
- *(regp + CTX_MDHI) =
- extract_signed_integer (®isters[REGISTER_BYTE (HI_REGNUM)],
- REGISTER_RAW_SIZE (HI_REGNUM));
+ if ((regno == -1) || (regno == mips_regnum (gdbarch)->hi))
+ {
+ regi = mips_regnum (gdbarch)->hi;
+ size = register_size (gdbarch, regi);
+ regcache_raw_collect (regcache, regi, buf);
+ *(regp + CTX_MDHI) = extract_signed_integer (buf, size);
+ }
- if ((regno == -1) || (regno == LO_REGNUM))
- *(regp + CTX_MDLO) =
- extract_signed_integer (®isters[REGISTER_BYTE (LO_REGNUM)],
- REGISTER_RAW_SIZE (LO_REGNUM));
+ if ((regno == -1) || (regno == mips_regnum (gdbarch)->lo))
+ {
+ regi = mips_regnum (gdbarch)->lo;
+ size = register_size (gdbarch, regi);
+ regcache_raw_collect (regcache, regi, buf);
+ *(regp + CTX_MDLO) = extract_signed_integer (buf, size);
+ }
}
/*
* Now we do the same thing for floating-point registers.
- * We don't bother to condition on FP0_REGNUM since any
+ * We don't bother to condition on gdbarch_fp0_regnum since any
* reasonable MIPS configuration has an R3010 in it.
*
* Again, see the comments in m68k-tdep.c.
*/
void
-supply_fpregset (fpregsetp)
- fpregset_t *fpregsetp;
+supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
{
- register int regi;
- static char zerobuf[MAX_REGISTER_RAW_SIZE] =
- {0};
+ int regi;
+ static char zerobuf[32] = {0};
+ char fsrbuf[8];
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
/* 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,
- (char *) &fpregsetp->fp_r.fp_regs[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);
+ regcache_raw_supply (regcache, gdbarch_fp0_regnum (gdbarch) + regi,
+ (const char *) &fpregsetp->fp_r.fp_regs[regi]);
+
+ /* We can't supply the FSR register directly to the regcache,
+ because there is a size issue: On one hand, fpregsetp->fp_csr
+ is 32bits long, while the regcache expects a 64bits long value.
+ So we use a buffer of the correct size and copy into it the register
+ value at the proper location. */
+ memset (fsrbuf, 0, 4);
+ memcpy (fsrbuf + 4, &fpregsetp->fp_csr, 4);
+
+ regcache_raw_supply (regcache,
+ mips_regnum (gdbarch)->fp_control_status, fsrbuf);
+
+ /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */
+ regcache_raw_supply (regcache,
+ mips_regnum (gdbarch)->fp_implementation_revision,
+ zerobuf);
}
void
-fill_fpregset (fpregsetp, regno)
- fpregset_t *fpregsetp;
- int regno;
+fill_fpregset (const struct regcache *regcache, fpregset_t *fpregsetp, int regno)
{
int regi;
char *from, *to;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
/* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */
- for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
+ for (regi = gdbarch_fp0_regnum (gdbarch);
+ regi < gdbarch_fp0_regnum (gdbarch) + 32; regi++)
{
if ((regno == -1) || (regno == regi))
{
- from = (char *) ®isters[REGISTER_BYTE (regi)];
- to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
- memcpy (to, from, REGISTER_RAW_SIZE (regi));
- }
- }
-
- if ((regno == -1) || (regno == FCRCS_REGNUM))
- fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE (FCRCS_REGNUM)];
-}
-
-
-/* Figure out where the longjmp will land.
- We expect the first arg to be a pointer to the jmp_buf structure from which
- we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
- This routine returns true on success. */
-
-int
-get_longjmp_target (pc)
- CORE_ADDR *pc;
-{
- char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
- CORE_ADDR jb_addr;
-
- jb_addr = read_register (A0_REGNUM);
-
- if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
- TARGET_PTR_BIT / TARGET_CHAR_BIT))
- return 0;
-
- *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
-
- return 1;
-}
-
-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 */
- CORE_ADDR reg_addr; /* Unused */
-{
- if (core_reg_size == REGISTER_BYTES)
- {
- memcpy ((char *) registers, core_reg_sect, core_reg_size);
- }
- else if (MIPS_REGSIZE == 4 &&
- core_reg_size == (2 * MIPS_REGSIZE) * NUM_REGS)
- {
- /* 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++;
- if (REGISTER_RAW_SIZE (regno) == 4)
- {
- /* copying 4 bytes from eight bytes?
- I don't see how this can be right... */
- srcp += 4;
- }
- else
- {
- /* copy all 8 bytes (sizeof(double)) */
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- }
- }
- else
- {
- srcp += 4;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- *dstp++ = *srcp++;
- }
+ to = (char *) &(fpregsetp->fp_r.fp_regs[regi - gdbarch_fp0_regnum
+ (gdbarch)]);
+ regcache_raw_collect (regcache, regi, to);
}
}
- else
- {
- warning ("wrong size gregset struct in core file");
- return;
- }
-
- 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 <sys/param.h>
-#include <fcntl.h>
-
-/* <obj.h> includes <sym.h> and <symconst.h>, which causes conflicts
- with our versions of those files included by tm-mips.h. Prevent
- <obj.h> from including them with some appropriate defines. */
-#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 "symfile.h"
-#include "objfiles.h"
-#include "command.h"
-#include "frame.h"
-#include "gnu-regex.h"
-#include "inferior.h"
-#include "language.h"
-#include "gdbcmd.h"
-
-/* The symbol which starts off the list of shared libraries. */
-#define DEBUG_BASE "__rld_obj_head"
-
-/* 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. */
-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 */
- };
-
-/* 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 */
-
-struct so_list
- {
- struct so_list *next; /* next structure in linked list */
- 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? */
- struct objfile *objfile; /* objfile for loaded lib */
- struct section_table *sections;
- struct section_table *sections_end;
- struct section_table *textsection;
- bfd *abfd;
- };
-
-static struct so_list *so_list_head; /* List of known shared objects */
-static CORE_ADDR debug_base; /* Base of dynamic linker structures */
-static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */
-
-/* Local function prototypes */
-
-static void
-sharedlibrary_command PARAMS ((char *, int));
-
-static int
-enable_break PARAMS ((void));
-
-static int
-disable_break PARAMS ((void));
-
-static void
-info_sharedlibrary_command PARAMS ((char *, int));
-
-static int
-symbol_add_stub PARAMS ((char *));
-
-static struct so_list *
- find_solib PARAMS ((struct so_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));
-
-static int
-solib_map_sections PARAMS ((char *));
-
-/*
-
- LOCAL FUNCTION
-
- solib_map_sections -- open bfd and build sections for shared lib
-
- SYNOPSIS
-
- static int solib_map_sections (struct so_list *so)
-
- DESCRIPTION
-
- Given a pointer to one of the shared objects in our list
- of mapped objects, use the recorded name to open a bfd
- descriptor for the object, build a section table, and then
- relocate all the section addresses by the base address at
- which the shared object was mapped.
-
- FIXMES
-
- In most (all?) cases the shared object file name recorded in the
- dynamic linkage tables will be a fully qualified pathname. For
- cases where it isn't, do we really mimic the systems search
- mechanism correctly in the below code (particularly the tilde
- expansion stuff?).
- */
-
-static int
-solib_map_sections (arg)
- char *arg;
-{
- struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */
- char *filename;
- char *scratch_pathname;
- int scratch_chan;
- struct section_table *p;
- struct cleanup *old_chain;
- bfd *abfd;
-
- filename = tilde_expand (so->so_name);
- old_chain = make_cleanup (free, filename);
-
- scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
- &scratch_pathname);
- if (scratch_chan < 0)
+ if (regno == -1
+ || regno == mips_regnum (gdbarch)->fp_control_status)
{
- scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename,
- O_RDONLY, 0, &scratch_pathname);
- }
- if (scratch_chan < 0)
- {
- perror_with_name (filename);
- }
- /* Leave scratch_pathname allocated. abfd->name will point to it. */
+ char fsrbuf[8];
- abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
- if (!abfd)
- {
- close (scratch_chan);
- error ("Could not open `%s' as an executable file: %s",
- scratch_pathname, bfd_errmsg (bfd_get_error ()));
- }
- /* Leave bfd open, core_xfer_memory and "info files" need it. */
- so->abfd = abfd;
- abfd->cacheable = true;
+ /* We can't fill the FSR register directly from the regcache,
+ because there is a size issue: On one hand, fpregsetp->fp_csr
+ is 32bits long, while the regcache expects a 64bits long buffer.
+ So we use a buffer of the correct size and copy the register
+ value from that buffer. */
+ regcache_raw_collect (regcache,
+ mips_regnum (gdbarch)->fp_control_status, fsrbuf);
- if (!bfd_check_format (abfd, bfd_object))
- {
- error ("\"%s\": not in executable format: %s.",
- scratch_pathname, bfd_errmsg (bfd_get_error ()));
+ memcpy (&fpregsetp->fp_csr, fsrbuf + 4, 4);
}
- if (build_section_table (abfd, &so->sections, &so->sections_end))
- {
- error ("Can't find the file sections in `%s': %s",
- bfd_get_filename (exec_bfd), bfd_errmsg (bfd_get_error ()));
- }
-
- for (p = so->sections; p < so->sections_end; p++)
- {
- /* Relocate the section binding addresses as recorded in the shared
- 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"))
- {
- so->textsection = p;
- }
- }
-
- /* Free the file names, close the file now. */
- do_cleanups (old_chain);
-
- return (1);
-}
-
-/*
-
- LOCAL FUNCTION
-
- locate_base -- locate the base address of dynamic linker structs
-
- SYNOPSIS
-
- CORE_ADDR locate_base (void)
-
- DESCRIPTION
-
- For both the SunOS and SVR4 shared library implementations, if the
- inferior executable has been linked dynamically, there is a single
- address somewhere in the inferior's data space which is the key to
- locating all of the dynamic linker's runtime structures. This
- address is the value of the symbol defined by the macro DEBUG_BASE.
- The job of this function is to find and return that address, or to
- return 0 if there is no such address (the executable is statically
- linked for example).
-
- For SunOS, the job is almost trivial, since the dynamic linker and
- all of it's structures are statically linked to the executable at
- link time. Thus the symbol for the address we are looking for has
- already been added to the minimal symbol table for the executable's
- objfile at the time the symbol file's symbols were read, and all we
- have to do is look it up there. Note that we explicitly do NOT want
- to find the copies in the shared library.
-
- The SVR4 version is much more complicated because the dynamic linker
- and it's structures are located in the shared C library, which gets
- run as the executable's "interpreter" by the kernel. We have to go
- to a lot more work to discover the address of DEBUG_BASE. Because
- of this complexity, we cache the value we find and return that value
- on subsequent invocations. Note there is no copy in the executable
- symbol tables.
-
- Irix 5 is basically like SunOS.
-
- Note that we can assume nothing about the process state at the time
- we need to find this address. We may be stopped on the first instruc-
- tion of the interpreter (C shared library), the first instruction of
- the executable itself, or somewhere else entirely (if we attached
- to the process for example).
-
- */
-
-static CORE_ADDR
-locate_base ()
-{
- struct minimal_symbol *msymbol;
- CORE_ADDR address = 0;
-
- msymbol = lookup_minimal_symbol (DEBUG_BASE, NULL, symfile_objfile);
- if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
- {
- address = SYMBOL_VALUE_ADDRESS (msymbol);
- }
- return (address);
-}
-
-/*
-
- LOCAL FUNCTION
-
- first_link_map_member -- locate first member in dynamic linker's map
-
- SYNOPSIS
-
- static struct link_map *first_link_map_member (void)
-
- DESCRIPTION
-
- 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 link map descriptor.
- */
-
-static struct link_map *
-first_link_map_member ()
-{
- 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;
-
- /* Get address of first list entry. */
- read_memory (debug_base, (char *) &listp, sizeof (struct obj_list *));
-
- 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. */
- 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;
-
- 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
+/* Provide registers to GDB from a core file.
- static struct link_map *next_link_map_member (so_list_ptr)
+ CORE_REG_SECT points to an array of bytes, which were obtained from
+ a core file which BFD thinks might contain register contents.
+ CORE_REG_SIZE is its size.
- DESCRIPTION
+ Normally, WHICH says which register set corelow suspects this is:
+ 0 --- the general-purpose register set
+ 2 --- the floating-point register set
+ However, for Irix 5, WHICH isn't used.
- 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.
- */
+ REG_ADDR is also unused. */
static void
-xfer_link_map_member (so_list_ptr, lm)
- struct so_list *so_list_ptr;
- struct link_map *lm;
+fetch_core_registers (struct regcache *regcache,
+ char *core_reg_sect, unsigned core_reg_size,
+ int which, CORE_ADDR reg_addr)
{
- 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;
+ char *srcp = core_reg_sect;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ int regsize = mips_isa_regsize (gdbarch);
+ int regno;
-#ifdef HANDLE_NEW_OBJ_LIST
- if (list_old.data == NEW_OBJ_INFO_MAGIC)
+ /* If regsize is 8, this is a N32 or N64 core file.
+ If regsize is 4, this is an O32 core file. */
+ if (core_reg_size != regsize * gdbarch_num_regs (gdbarch))
{
- 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
- }
-
- catch_errors (solib_map_sections, (char *) so_list_ptr,
- "Error while mapping shared library sections:\n",
- RETURN_MASK_ALL);
-}
-
-
-/*
-
- LOCAL FUNCTION
-
- find_solib -- step through list of shared objects
-
- SYNOPSIS
-
- struct so_list *find_solib (struct so_list *so_list_ptr)
-
- DESCRIPTION
-
- This module contains the routine which finds the names of any
- loaded "images" in the current process. The argument in must be
- NULL on the first call, and then the returned value must be passed
- in on subsequent calls. This provides the capability to "step" down
- the list of loaded objects. On the last object, a NULL value is
- returned.
- */
-
-static struct so_list *
-find_solib (so_list_ptr)
- struct so_list *so_list_ptr; /* Last lm or NULL for first one */
-{
- struct so_list *so_list_next = 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)
- {
- /* 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. */
- lm = next_link_map_member (so_list_ptr);
- so_list_next = so_list_ptr->next;
- }
- if ((so_list_next == NULL) && (lm != NULL))
- {
- new = (struct so_list *) xmalloc (sizeof (struct so_list));
- memset ((char *) new, 0, sizeof (struct so_list));
- /* 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_ptr->next = new;
- }
- else
- {
- so_list_head = new;
- }
- so_list_next = new;
- xfer_link_map_member (new, lm);
- }
- return (so_list_next);
-}
-
-/* A small stub to get us past the arg-passing pinhole of catch_errors. */
-
-static int
-symbol_add_stub (arg)
- char *arg;
-{
- register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */
- CORE_ADDR text_addr = 0;
- struct section_addr_info section_addrs;
-
- memset (§ion_addrs, 0, sizeof (section_addrs));
- if (so->textsection)
- text_addr = so->textsection->addr;
- else if (so->abfd != NULL)
- {
- 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);
- }
-
- section_addrs.text_addr = text_addr;
- so->objfile = symbol_file_add (so->so_name, so->from_tty,
- §ion_addrs, 0, 0);
- return (1);
-}
-
-/*
-
- GLOBAL FUNCTION
-
- solib_add -- add a shared library file to the symtab and section list
-
- SYNOPSIS
-
- void solib_add (char *arg_string, int from_tty,
- struct target_ops *target)
-
- DESCRIPTION
-
- */
-
-void
-solib_add (arg_string, from_tty, target)
- char *arg_string;
- int from_tty;
- struct target_ops *target;
-{
- register struct so_list *so = NULL; /* link map state variable */
-
- /* Last shared library that we read. */
- struct so_list *so_last = NULL;
-
- char *re_err;
- int count;
- int old;
-
- if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL)
- {
- error ("Invalid regexp: %s", re_err);
- }
-
- /* Add the shared library sections to the section table of the
- specified target, if any. */
- if (target)
- {
- /* Count how many new section_table entries there are. */
- so = NULL;
- count = 0;
- while ((so = find_solib (so)) != NULL)
- {
- if (so->so_name[0])
- {
- count += so->sections_end - so->sections;
- }
- }
-
- if (count)
- {
- old = target_resize_to_sections (target, count);
-
- /* Add these section table entries to the target's table. */
- while ((so = find_solib (so)) != NULL)
- {
- if (so->so_name[0])
- {
- count = so->sections_end - so->sections;
- memcpy ((char *) (target->to_sections + old),
- so->sections,
- (sizeof (struct section_table)) * count);
- old += count;
- }
- }
- }
- }
-
- /* 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 ();
-}
-
-/*
-
- LOCAL FUNCTION
-
- info_sharedlibrary_command -- code for "info sharedlibrary"
-
- SYNOPSIS
-
- static void info_sharedlibrary_command ()
-
- DESCRIPTION
-
- Walk through the shared library list and print information
- about each attached library.
- */
-
-static void
-info_sharedlibrary_command (ignore, from_tty)
- char *ignore;
- int from_tty;
-{
- register struct so_list *so = NULL; /* link map state variable */
- int header_done = 0;
-
- if (exec_bfd == NULL)
- {
- printf_unfiltered ("No exec file.\n");
- return;
- }
- while ((so = find_solib (so)) != NULL)
- {
- if (so->so_name[0])
- {
- if (!header_done)
- {
- printf_unfiltered ("%-12s%-12s%-12s%s\n", "From", "To", "Syms Read",
- "Shared Object Library");
- header_done++;
- }
- printf_unfiltered ("%-12s",
- local_hex_string_custom ((unsigned long) LM_ADDR (so),
- "08l"));
- printf_unfiltered ("%-12s",
- local_hex_string_custom ((unsigned long) so->lmend,
- "08l"));
- printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No");
- printf_unfiltered ("%s\n", so->so_name);
- }
- }
- if (so_list_head == NULL)
- {
- printf_unfiltered ("No shared libraries loaded at this time.\n");
- }
-}
-
-/*
-
- GLOBAL FUNCTION
-
- solib_address -- check to see if an address is in a shared lib
-
- SYNOPSIS
-
- char *solib_address (CORE_ADDR address)
-
- DESCRIPTION
-
- Provides a hook for other gdb routines to discover whether or
- not a particular address is within the mapped address space of
- a shared library. Any address between the base mapping address
- and the first address beyond the end of the last mapping, is
- considered to be within the shared library address space, for
- our purposes.
-
- For example, this routine is called at one point to disable
- breakpoints which are in shared libraries that are not currently
- mapped in.
- */
-
-char *
-solib_address (address)
- CORE_ADDR address;
-{
- register struct so_list *so = 0; /* link map state variable */
-
- while ((so = find_solib (so)) != NULL)
- {
- if (so->so_name[0])
- {
- if ((address >= (CORE_ADDR) LM_ADDR (so)) &&
- (address < (CORE_ADDR) so->lmend))
- return (so->so_name);
- }
- }
- return (0);
-}
-
-/* Called by free_all_symtabs */
-
-void
-clear_solib ()
-{
- struct so_list *next;
- char *bfd_filename;
-
- disable_breakpoints_in_shlibs (1);
-
- while (so_list_head)
- {
- if (so_list_head->sections)
- {
- free ((PTR) so_list_head->sections);
- }
- if (so_list_head->abfd)
- {
- bfd_filename = bfd_get_filename (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. */
- bfd_filename = NULL;
-
- next = so_list_head->next;
- if (bfd_filename)
- free ((PTR) bfd_filename);
- free (so_list_head->so_name);
- free ((PTR) so_list_head);
- so_list_head = next;
- }
- debug_base = 0;
-}
-
-/*
-
- LOCAL FUNCTION
-
- disable_break -- remove the "mapping changed" breakpoint
-
- SYNOPSIS
-
- static int disable_break ()
-
- DESCRIPTION
-
- Removes the breakpoint that gets hit when the dynamic linker
- completes a mapping change.
-
- */
-
-static int
-disable_break ()
-{
- int status = 1;
-
-
- /* Note that breakpoint address and original contents are in our address
- space, so we just need to write the original contents back. */
-
- if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0)
- {
- status = 0;
- }
-
- /* For the SVR4 version, we always know the breakpoint address. For the
- SunOS version we don't know it until the above code is executed.
- Grumble if we are stopped anywhere besides the breakpoint address. */
-
- if (stop_pc != breakpoint_addr)
- {
- warning ("stopped at unknown breakpoint while handling shared libraries");
- }
-
- return (status);
-}
-
-/*
-
- LOCAL FUNCTION
-
- enable_break -- arrange for dynamic linker to hit breakpoint
-
- SYNOPSIS
-
- int enable_break (void)
-
- DESCRIPTION
-
- This functions inserts a breakpoint at the entry point of the
- main executable, where all shared libraries are mapped in.
- */
-
-static int
-enable_break ()
-{
- if (symfile_objfile != NULL
- && target_insert_breakpoint (symfile_objfile->ei.entry_point,
- shadow_contents) == 0)
- {
- breakpoint_addr = symfile_objfile->ei.entry_point;
- return 1;
- }
-
- return 0;
-}
-
-/*
-
- GLOBAL FUNCTION
-
- solib_create_inferior_hook -- shared library startup support
-
- SYNOPSIS
-
- void solib_create_inferior_hook()
-
- DESCRIPTION
-
- When gdb starts up the inferior, it nurses it along (through the
- shell) until it is ready to execute it's first instruction. At this
- point, this function gets called via expansion of the macro
- SOLIB_CREATE_INFERIOR_HOOK.
-
- For SunOS executables, this first instruction is typically the
- one at "_start", or a similar text label, regardless of whether
- the executable is statically or dynamically linked. The runtime
- startup code takes care of dynamically linking in any shared
- libraries, once gdb allows the inferior to continue.
-
- For SVR4 executables, this first instruction is either the first
- instruction in the dynamic linker (for dynamically linked
- executables) or the instruction at "start" for statically linked
- executables. For dynamically linked executables, the system
- first exec's /lib/libc.so.N, which contains the dynamic linker,
- and starts it running. The dynamic linker maps in any needed
- shared libraries, maps in the actual user executable, and then
- jumps to "start" in the user executable.
-
- For both SunOS shared libraries, and SVR4 shared libraries, we
- can arrange to cooperate with the dynamic linker to discover the
- names of shared libraries that are dynamically linked, and the
- base addresses to which they are linked.
-
- This function is responsible for discovering those names and
- addresses, and saving sufficient information about them to allow
- their symbols to be read at a later time.
-
- FIXME
-
- Between enable_break() and disable_break(), this code does not
- properly handle hitting breakpoints which the user might have
- set in the startup code or in the dynamic linker itself. Proper
- handling will probably have to wait until the implementation is
- changed to use the "breakpoint handler function" method.
-
- Also, what if child has exit()ed? Must exit loop somehow.
- */
-
-void
-solib_create_inferior_hook ()
-{
- if (!enable_break ())
- {
- warning ("shared library handler failed to enable breakpoint");
+ warning (_("wrong size gregset struct in core file"));
return;
}
- /* Now run the target. It will eventually hit the breakpoint, at
- which point all of the libraries will have been mapped in and we
- can go groveling around in the dynamic linker structures to find
- out what we need to know about them. */
-
- clear_proceed_status ();
- stop_soon_quietly = 1;
- stop_signal = TARGET_SIGNAL_0;
- do
+ for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
{
- target_resume (-1, 0, stop_signal);
- wait_for_inferior ();
+ regcache_raw_supply (regcache, regno, srcp);
+ srcp += regsize;
}
- 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
- the PC as necessary after a breakpoint, disable the breakpoint, and
- add any shared libraries that were mapped in. */
-
- if (DECR_PC_AFTER_BREAK)
- {
- stop_pc -= DECR_PC_AFTER_BREAK;
- write_register (PC_REGNUM, stop_pc);
- }
-
- if (!disable_break ())
- {
- warning ("shared library handler failed to disable breakpoint");
- }
-
- /* 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;
-}
-
-/*
-
- LOCAL FUNCTION
-
- sharedlibrary_command -- handle command to explicitly add library
-
- SYNOPSIS
-
- static void sharedlibrary_command (char *args, int from_tty)
-
- DESCRIPTION
-
- */
-
-static void
-sharedlibrary_command (args, from_tty)
- char *args;
- int from_tty;
-{
- dont_repeat ();
- solib_add (args, from_tty, (struct target_ops *) 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 */
};
void
-_initialize_core_irix5 ()
+_initialize_core_irix5 (void)
{
- add_core_fns (&irix5_core_fns);
+ deprecated_add_core_fns (&irix5_core_fns);
}
projects / external / binutils.git / blobdiff