X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Frs6000-nat.c;h=f1ee4225fe58781266ac64294aec231e68d3c946;hb=43841e9116d121fa81a351b66ec9e0821a1b4be8;hp=c6f5c5f64e5bd22a7e1bd16c3c58dbe6d90e26b6;hpb=356ff909bd4ce1845a883a26433426a526274fb7;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/rs6000-nat.c b/gdb/rs6000-nat.c index c6f5c5f64e..f1ee4225fe 100644 --- a/gdb/rs6000-nat.c +++ b/gdb/rs6000-nat.c @@ -1,21 +1,23 @@ /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. - Copyright 1986, 1987, 1989, 1991, 1992, 1994 Free Software Foundation, Inc. + Copyright 1986, 1987, 1989, 1991, 1992, 1994, 1995, 1996, 1997, 1998 + Free Software Foundation, Inc. -This file is part of GDB. + This file is part of GDB. -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 -(at your option) any later version. + 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 + (at your option) any later version. -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + 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. */ #include "defs.h" #include "inferior.h" @@ -24,7 +26,9 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "xcoffsolib.h" #include "symfile.h" #include "objfiles.h" +#include "libbfd.h" /* For bfd_cache_lookup (FIXME) */ #include "bfd.h" +#include "gdb-stabs.h" #include #include @@ -38,89 +42,104 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include -#include +#include "gdb_stat.h" #include #include extern int errno; -extern struct vmap * map_vmap PARAMS ((bfd *bf, bfd *arch)); +extern struct vmap *map_vmap (bfd * bf, bfd * arch); extern struct target_ops exec_ops; -static void -exec_one_dummy_insn PARAMS ((void)); +static void vmap_exec (void); -extern void -add_text_to_loadinfo PARAMS ((CORE_ADDR textaddr, CORE_ADDR dataaddr)); +static void vmap_ldinfo (struct ld_info *); + +static struct vmap *add_vmap (struct ld_info *); + +static int objfile_symbol_add (char *); + +static void vmap_symtab (struct vmap *); + +static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); + +static void exec_one_dummy_insn (void); extern void -fixup_breakpoints PARAMS ((CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta)); +fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); /* Conversion from gdb-to-system special purpose register numbers.. */ -static int special_regs[] = { - IAR, /* PC_REGNUM */ - MSR, /* PS_REGNUM */ - CR, /* CR_REGNUM */ - LR, /* LR_REGNUM */ - CTR, /* CTR_REGNUM */ +static int special_regs[] = +{ + IAR, /* PC_REGNUM */ + MSR, /* PS_REGNUM */ + CR, /* CR_REGNUM */ + LR, /* LR_REGNUM */ + CTR, /* CTR_REGNUM */ XER, /* XER_REGNUM */ - MQ /* MQ_REGNUM */ + MQ /* MQ_REGNUM */ }; void fetch_inferior_registers (regno) - int regno; + int regno; { int ii; - extern char registers[]; - if (regno < 0) { /* for all registers */ + if (regno < 0) + { /* for all registers */ - /* read 32 general purpose registers. */ + /* read 32 general purpose registers. */ - for (ii=0; ii < 32; ++ii) - *(int*)®isters[REGISTER_BYTE (ii)] = - ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, 0, 0); + for (ii = 0; ii < 32; ++ii) + *(int *) ®isters[REGISTER_BYTE (ii)] = + ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, 0, 0); - /* read general purpose floating point registers. */ + /* read general purpose floating point registers. */ - for (ii=0; ii < 32; ++ii) - ptrace (PT_READ_FPR, inferior_pid, - (PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (FP0_REGNUM+ii)], - FPR0+ii, 0); + for (ii = 0; ii < 32; ++ii) + ptrace (PT_READ_FPR, inferior_pid, + (PTRACE_ARG3_TYPE) & registers[REGISTER_BYTE (FP0_REGNUM + ii)], + FPR0 + ii, 0); - /* read special registers. */ - for (ii=0; ii <= LAST_SP_REGNUM-FIRST_SP_REGNUM; ++ii) - *(int*)®isters[REGISTER_BYTE (FIRST_SP_REGNUM+ii)] = - ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) special_regs[ii], - 0, 0); + /* read special registers. */ + for (ii = 0; ii <= LAST_UISA_SP_REGNUM - FIRST_UISA_SP_REGNUM; ++ii) + *(int *) ®isters[REGISTER_BYTE (FIRST_UISA_SP_REGNUM + ii)] = + ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) special_regs[ii], + 0, 0); - registers_fetched (); - return; - } + registers_fetched (); + return; + } /* else an individual register is addressed. */ - else if (regno < FP0_REGNUM) { /* a GPR */ - *(int*)®isters[REGISTER_BYTE (regno)] = + else if (regno < FP0_REGNUM) + { /* a GPR */ + *(int *) ®isters[REGISTER_BYTE (regno)] = ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno, 0, 0); - } - else if (regno <= FPLAST_REGNUM) { /* a FPR */ - ptrace (PT_READ_FPR, inferior_pid, - (PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (regno)], - (regno-FP0_REGNUM+FPR0), 0); - } - else if (regno <= LAST_SP_REGNUM) { /* a special register */ - *(int*)®isters[REGISTER_BYTE (regno)] = + } + else if (regno <= FPLAST_REGNUM) + { /* a FPR */ + ptrace (PT_READ_FPR, inferior_pid, + (PTRACE_ARG3_TYPE) & registers[REGISTER_BYTE (regno)], + (regno - FP0_REGNUM + FPR0), 0); + } + else if (regno <= LAST_UISA_SP_REGNUM) + { /* a special register */ + *(int *) ®isters[REGISTER_BYTE (regno)] = ptrace (PT_READ_GPR, inferior_pid, - (PTRACE_ARG3_TYPE) special_regs[regno-FIRST_SP_REGNUM], 0, 0); - } + (PTRACE_ARG3_TYPE) special_regs[regno - FIRST_UISA_SP_REGNUM], + 0, 0); + } else - fprintf_unfiltered (gdb_stderr, "gdb error: register no %d not implemented.\n", regno); + fprintf_unfiltered (gdb_stderr, + "gdb error: register no %d not implemented.\n", + regno); - register_valid [regno] = 1; + register_valid[regno] = 1; } /* Store our register values back into the inferior. @@ -131,39 +150,38 @@ void store_inferior_registers (regno) int regno; { - extern char registers[]; errno = 0; if (regno == -1) - { /* for all registers.. */ + { /* for all registers.. */ int ii; - /* execute one dummy instruction (which is a breakpoint) in inferior - process. So give kernel a chance to do internal house keeping. - Otherwise the following ptrace(2) calls will mess up user stack - since kernel will get confused about the bottom of the stack (%sp) */ + /* execute one dummy instruction (which is a breakpoint) in inferior + process. So give kernel a chance to do internal house keeping. + Otherwise the following ptrace(2) calls will mess up user stack + since kernel will get confused about the bottom of the stack (%sp) */ - exec_one_dummy_insn (); + exec_one_dummy_insn (); /* write general purpose registers first! */ - for ( ii=GPR0; ii<=GPR31; ++ii) + for (ii = GPR0; ii <= GPR31; ++ii) { ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, - *(int*)®isters[REGISTER_BYTE (ii)], 0); + *(int *) ®isters[REGISTER_BYTE (ii)], 0); if (errno) - { + { perror ("ptrace write_gpr"); errno = 0; } } /* write floating point registers now. */ - for ( ii=0; ii < 32; ++ii) + for (ii = 0; ii < 32; ++ii) { - ptrace (PT_WRITE_FPR, inferior_pid, - (PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (FP0_REGNUM+ii)], - FPR0+ii, 0); + ptrace (PT_WRITE_FPR, inferior_pid, + (PTRACE_ARG3_TYPE) & registers[REGISTER_BYTE (FP0_REGNUM + ii)], + FPR0 + ii, 0); if (errno) { perror ("ptrace write_fpr"); @@ -172,11 +190,12 @@ store_inferior_registers (regno) } /* write special registers. */ - for (ii=0; ii <= LAST_SP_REGNUM-FIRST_SP_REGNUM; ++ii) + for (ii = 0; ii <= LAST_UISA_SP_REGNUM - FIRST_UISA_SP_REGNUM; ++ii) { ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) special_regs[ii], - *(int*)®isters[REGISTER_BYTE (FIRST_SP_REGNUM+ii)], 0); + *(int *) ®isters[REGISTER_BYTE (FIRST_UISA_SP_REGNUM + ii)], + 0); if (errno) { perror ("ptrace write_gpr"); @@ -187,28 +206,37 @@ store_inferior_registers (regno) /* else, a specific register number is given... */ - else if (regno < FP0_REGNUM) /* a GPR */ + else if (regno < FP0_REGNUM) /* a GPR */ { + if (regno == SP_REGNUM) + exec_one_dummy_insn (); ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno, - *(int*)®isters[REGISTER_BYTE (regno)], 0); + *(int *) ®isters[REGISTER_BYTE (regno)], 0); } - else if (regno <= FPLAST_REGNUM) /* a FPR */ + else if (regno <= FPLAST_REGNUM) /* a FPR */ { - ptrace (PT_WRITE_FPR, inferior_pid, - (PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (regno)], + ptrace (PT_WRITE_FPR, inferior_pid, + (PTRACE_ARG3_TYPE) & registers[REGISTER_BYTE (regno)], regno - FP0_REGNUM + FPR0, 0); } - else if (regno <= LAST_SP_REGNUM) /* a special register */ + else if (regno <= LAST_UISA_SP_REGNUM) /* a special register */ { ptrace (PT_WRITE_GPR, inferior_pid, - (PTRACE_ARG3_TYPE) special_regs [regno-FIRST_SP_REGNUM], - *(int*)®isters[REGISTER_BYTE (regno)], 0); + (PTRACE_ARG3_TYPE) special_regs[regno - FIRST_UISA_SP_REGNUM], + *(int *) ®isters[REGISTER_BYTE (regno)], 0); + } + + else if (regno < NUM_REGS) + { + /* Ignore it. */ } else - fprintf_unfiltered (gdb_stderr, "Gdb error: register no %d not implemented.\n", regno); + fprintf_unfiltered (gdb_stderr, + "Gdb error: register no %d not implemented.\n", + regno); if (errno) { @@ -226,32 +254,46 @@ exec_one_dummy_insn () { #define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200 - char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ - unsigned int status, pid; + char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ + int status, pid; + CORE_ADDR prev_pc; - /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We assume that - this address will never be executed again by the real code. */ + /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We + assume that this address will never be executed again by the real + code. */ target_insert_breakpoint (DUMMY_INSN_ADDR, shadow_contents); errno = 0; - ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE) DUMMY_INSN_ADDR, 0, 0); + + /* You might think this could be done with a single ptrace call, and + you'd be correct for just about every platform I've ever worked + on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- + the inferior never hits the breakpoint (it's also worth noting + powerpc-ibm-aix4.1.3 works correctly). */ + prev_pc = read_pc (); + write_pc (DUMMY_INSN_ADDR); + ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE) 1, 0, 0); + if (errno) perror ("pt_continue"); - do { - pid = wait (&status); - } while (pid != inferior_pid); - + do + { + pid = wait (&status); + } + while (pid != inferior_pid); + + write_pc (prev_pc); target_remove_breakpoint (DUMMY_INSN_ADDR, shadow_contents); } -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; - unsigned int reg_addr; /* Unused in this version */ + CORE_ADDR reg_addr; /* Unused in this version */ { /* fetch GPRs and special registers from the first register section in core bfd. */ @@ -261,20 +303,23 @@ fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) memcpy (registers, core_reg_sect, 32 * 4); /* gdb's internal register template and bfd's register section layout - should share a common include file. FIXMEmgo */ + should share a common include file. FIXMEmgo */ /* then comes special registes. They are supposed to be in the same - order in gdb template and bfd `.reg' section. */ + order in gdb template and bfd `.reg' section. */ core_reg_sect += (32 * 4); - memcpy (®isters [REGISTER_BYTE (FIRST_SP_REGNUM)], core_reg_sect, - (LAST_SP_REGNUM - FIRST_SP_REGNUM + 1) * 4); + memcpy (®isters[REGISTER_BYTE (FIRST_UISA_SP_REGNUM)], + core_reg_sect, + (LAST_UISA_SP_REGNUM - FIRST_UISA_SP_REGNUM + 1) * 4); } /* fetch floating point registers from register section 2 in core bfd. */ else if (which == 2) - memcpy (®isters [REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 32 * 8); + memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 32 * 8); else - fprintf_unfiltered (gdb_stderr, "Gdb error: unknown parameter to fetch_core_registers().\n"); + fprintf_unfiltered + (gdb_stderr, + "Gdb error: unknown parameter to fetch_core_registers().\n"); } /* handle symbol translation on vmapping */ @@ -284,75 +329,32 @@ vmap_symtab (vp) register struct vmap *vp; { register struct objfile *objfile; - asection *textsec; - asection *datasec; - asection *bsssec; - CORE_ADDR text_delta; - CORE_ADDR data_delta; - CORE_ADDR bss_delta; struct section_offsets *new_offsets; int i; - + objfile = vp->objfile; if (objfile == NULL) { /* OK, it's not an objfile we opened ourselves. - Currently, that can only happen with the exec file, so - relocate the symbols for the symfile. */ + Currently, that can only happen with the exec file, so + relocate the symbols for the symfile. */ if (symfile_objfile == NULL) return; objfile = symfile_objfile; } - new_offsets = alloca - (sizeof (struct section_offsets) - + sizeof (new_offsets->offsets) * objfile->num_sections); + new_offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); for (i = 0; i < objfile->num_sections; ++i) ANOFFSET (new_offsets, i) = ANOFFSET (objfile->section_offsets, i); - - textsec = bfd_get_section_by_name (vp->bfd, ".text"); - text_delta = - vp->tstart - ANOFFSET (objfile->section_offsets, textsec->target_index); - ANOFFSET (new_offsets, textsec->target_index) = vp->tstart; - - datasec = bfd_get_section_by_name (vp->bfd, ".data"); - data_delta = - vp->dstart - ANOFFSET (objfile->section_offsets, datasec->target_index); - ANOFFSET (new_offsets, datasec->target_index) = vp->dstart; - - bsssec = bfd_get_section_by_name (vp->bfd, ".bss"); - bss_delta = - vp->dstart - ANOFFSET (objfile->section_offsets, bsssec->target_index); - ANOFFSET (new_offsets, bsssec->target_index) = vp->dstart; - objfile_relocate (objfile, new_offsets); + /* The symbols in the object file are linked to the VMA of the section, + relocate them VMA relative. */ + ANOFFSET (new_offsets, SECT_OFF_TEXT (objfile)) = vp->tstart - vp->tvma; + ANOFFSET (new_offsets, SECT_OFF_DATA (objfile)) = vp->dstart - vp->dvma; + ANOFFSET (new_offsets, SECT_OFF_BSS (objfile)) = vp->dstart - vp->dvma; - { - struct obj_section *s; - for (s = objfile->sections; s < objfile->sections_end; ++s) - { - if (s->the_bfd_section->target_index == textsec->target_index) - { - s->addr += text_delta; - s->endaddr += text_delta; - } - else if (s->the_bfd_section->target_index == datasec->target_index) - { - s->addr += data_delta; - s->endaddr += data_delta; - } - else if (s->the_bfd_section->target_index == bsssec->target_index) - { - s->addr += bss_delta; - s->endaddr += bss_delta; - } - } - } - - if (text_delta != 0) - /* breakpoints need to be relocated as well. */ - fixup_breakpoints (0, TEXT_SEGMENT_BASE, text_delta); + objfile_relocate (objfile, new_offsets); } /* Add symbols for an objfile. */ @@ -363,7 +365,7 @@ objfile_symbol_add (arg) { struct objfile *obj = (struct objfile *) arg; - syms_from_objfile (obj, 0, 0, 0); + syms_from_objfile (obj, NULL, 0, 0); new_symfile_objfile (obj, 0, 0); return 1; } @@ -377,7 +379,7 @@ objfile_symbol_add (arg) static struct vmap * add_vmap (ldi) - register struct ld_info *ldi; + register struct ld_info *ldi; { bfd *abfd, *last; register char *mem, *objname; @@ -420,12 +422,12 @@ add_vmap (ldi) bfd_close (abfd); /* FIXME -- should be error */ warning ("\"%s\": member \"%s\" missing.", abfd->filename, mem); - return; + return 0; } - if (!bfd_check_format(last, bfd_object)) + if (!bfd_check_format (last, bfd_object)) { - bfd_close (last); /* XXX??? */ + bfd_close (last); /* XXX??? */ goto obj_err; } @@ -437,13 +439,13 @@ add_vmap (ldi) bfd_close (abfd); error ("\"%s\": not in executable format: %s.", objname, bfd_errmsg (bfd_get_error ())); - /*NOTREACHED*/ + /*NOTREACHED */ } obj = allocate_objfile (vp->bfd, 0); vp->objfile = obj; #ifndef SOLIB_SYMBOLS_MANUAL - if (catch_errors (objfile_symbol_add, (char *)obj, + if (catch_errors (objfile_symbol_add, (char *) obj, "Error while reading shared library symbols:\n", RETURN_MASK_ALL)) { @@ -464,87 +466,119 @@ vmap_ldinfo (ldi) { struct stat ii, vi; register struct vmap *vp; - register got_one, retried; - CORE_ADDR ostart; + int got_one, retried; + int got_exec_file = 0; /* For each *ldi, see if we have a corresponding *vp. If so, update the mapping, and symbol table. If not, add an entry and symbol table. */ - do { - char *name = ldi->ldinfo_filename; - char *memb = name + strlen(name) + 1; - - retried = 0; - - if (fstat (ldi->ldinfo_fd, &ii) < 0) - fatal ("cannot fstat(fd=%d) on %s", ldi->ldinfo_fd, name); - retry: - for (got_one = 0, vp = vmap; vp; vp = vp->nxt) - { - FILE *io; - - /* First try to find a `vp', which is the same as in ldinfo. - If not the same, just continue and grep the next `vp'. If same, - relocate its tstart, tend, dstart, dend values. If no such `vp' - found, get out of this for loop, add this ldi entry as a new vmap - (add_vmap) and come back, fins its `vp' and so on... */ - - /* The filenames are not always sufficient to match on. */ - - if ((name[0] == '/' && !STREQ(name, vp->name)) - || (memb[0] && !STREQ(memb, vp->member))) - continue; + do + { + char *name = ldi->ldinfo_filename; + char *memb = name + strlen (name) + 1; - io = bfd_cache_lookup (vp->bfd); /* totally opaque! */ - if (!io) - fatal ("cannot find BFD's iostream for %s", vp->name); + retried = 0; - /* See if we are referring to the same file. */ - /* An error here is innocuous, most likely meaning that - the file descriptor has become worthless. */ - if (fstat (fileno(io), &vi) < 0) + if (fstat (ldi->ldinfo_fd, &ii) < 0) + { + /* The kernel sets ld_info to -1, if the process is still using the + object, and the object is removed. Keep the symbol info for the + removed object and issue a warning. */ + warning ("%s (fd=%d) has disappeared, keeping its symbols", + name, ldi->ldinfo_fd); continue; + } + retry: + for (got_one = 0, vp = vmap; vp; vp = vp->nxt) + { + struct objfile *objfile; + + /* First try to find a `vp', which is the same as in ldinfo. + If not the same, just continue and grep the next `vp'. If same, + relocate its tstart, tend, dstart, dend values. If no such `vp' + found, get out of this for loop, add this ldi entry as a new vmap + (add_vmap) and come back, find its `vp' and so on... */ + + /* The filenames are not always sufficient to match on. */ + + if ((name[0] == '/' && !STREQ (name, vp->name)) + || (memb[0] && !STREQ (memb, vp->member))) + continue; + + /* See if we are referring to the same file. + We have to check objfile->obfd, symfile.c:reread_symbols might + have updated the obfd after a change. */ + objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; + if (objfile == NULL + || objfile->obfd == NULL + || bfd_stat (objfile->obfd, &vi) < 0) + { + warning ("Unable to stat %s, keeping its symbols", name); + continue; + } - if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) - continue; + if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) + continue; - if (!retried) - close (ldi->ldinfo_fd); + if (!retried) + close (ldi->ldinfo_fd); - ++got_one; + ++got_one; - /* found a corresponding VMAP. remap! */ - ostart = vp->tstart; + /* Found a corresponding VMAP. Remap! */ - /* We can assume pointer == CORE_ADDR, this code is native only. */ - vp->tstart = (CORE_ADDR) ldi->ldinfo_textorg; - vp->tend = vp->tstart + ldi->ldinfo_textsize; - vp->dstart = (CORE_ADDR) ldi->ldinfo_dataorg; - vp->dend = vp->dstart + ldi->ldinfo_datasize; + /* We can assume pointer == CORE_ADDR, this code is native only. */ + vp->tstart = (CORE_ADDR) ldi->ldinfo_textorg; + vp->tend = vp->tstart + ldi->ldinfo_textsize; + vp->dstart = (CORE_ADDR) ldi->ldinfo_dataorg; + vp->dend = vp->dstart + ldi->ldinfo_datasize; - if (vp->tadj) - { - vp->tstart += vp->tadj; - vp->tend += vp->tadj; - } + /* The run time loader maps the file header in addition to the text + section and returns a pointer to the header in ldinfo_textorg. + Adjust the text start address to point to the real start address + of the text section. */ + vp->tstart += vp->toffs; - /* relocate symbol table(s). */ - vmap_symtab (vp); + /* The objfile is only NULL for the exec file. */ + if (vp->objfile == NULL) + got_exec_file = 1; - /* there may be more, so we don't break out of the loop. */ - } + /* relocate symbol table(s). */ + vmap_symtab (vp); - /* if there was no matching *vp, we must perforce create the sucker(s) */ - if (!got_one && !retried) - { - add_vmap (ldi); - ++retried; - goto retry; - } - } while (ldi->ldinfo_next - && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi))); + /* There may be more, so we don't break out of the loop. */ + } + /* if there was no matching *vp, we must perforce create the sucker(s) */ + if (!got_one && !retried) + { + add_vmap (ldi); + ++retried; + goto retry; + } + } + while (ldi->ldinfo_next + && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi))); + + /* If we don't find the symfile_objfile anywhere in the ldinfo, it + is unlikely that the symbol file is relocated to the proper + address. And we might have attached to a process which is + running a different copy of the same executable. */ + if (symfile_objfile != NULL && !got_exec_file) + { + warning_begin (); + fputs_unfiltered ("Symbol file ", gdb_stderr); + fputs_unfiltered (symfile_objfile->name, gdb_stderr); + fputs_unfiltered ("\nis not mapped; discarding it.\n\ +If in fact that file has symbols which the mapped files listed by\n\ +\"info files\" lack, you can load symbols with the \"symbol-file\" or\n\ +\"add-symbol-file\" commands (note that you must take care of relocating\n\ +symbols to the proper address).\n", gdb_stderr); + free_objfile (symfile_objfile); + symfile_objfile = NULL; + } + breakpoint_re_set (); } /* As well as symbol tables, exec_sections need relocation. After @@ -555,7 +589,7 @@ vmap_ldinfo (ldi) `exec_sections' need to be relocated only once, as long as the exec file remains unchanged. -*/ + */ static void vmap_exec () @@ -571,64 +605,66 @@ vmap_exec () if (!vmap || !exec_ops.to_sections) error ("vmap_exec: vmap or exec_ops.to_sections == 0\n"); - for (i=0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) + for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) { - if (STREQ(".text", exec_ops.to_sections[i].the_bfd_section->name)) + if (STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name)) + { + exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma; + exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma; + } + else if (STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name)) { - exec_ops.to_sections[i].addr += vmap->tstart; - exec_ops.to_sections[i].endaddr += vmap->tstart; + exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; + exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; } - else if (STREQ(".data", exec_ops.to_sections[i].the_bfd_section->name)) + else if (STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name)) { - exec_ops.to_sections[i].addr += vmap->dstart; - exec_ops.to_sections[i].endaddr += vmap->dstart; + exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; + exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; } } } -/* xcoff_relocate_symtab - hook for symbol table relocation. +/* xcoff_relocate_symtab - hook for symbol table relocation. also reads shared libraries.. */ void xcoff_relocate_symtab (pid) unsigned int pid; { -#define MAX_LOAD_SEGS 64 /* maximum number of load segments */ - - struct ld_info *ldi; - - ldi = (void *) alloca(MAX_LOAD_SEGS * sizeof (*ldi)); - - /* According to my humble theory, AIX has some timing problems and - when the user stack grows, kernel doesn't update stack info in time - and ptrace calls step on user stack. That is why we sleep here a little, - and give kernel to update its internals. */ + int load_segs = 64; /* number of load segments */ + int rc; + struct ld_info *ldi = NULL; - usleep (36000); - - errno = 0; - ptrace (PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi, - MAX_LOAD_SEGS * sizeof(*ldi), ldi); - if (errno) - perror_with_name ("ptrace ldinfo"); + do + { + ldi = (void *) xrealloc (ldi, load_segs * sizeof (*ldi)); - vmap_ldinfo (ldi); + /* According to my humble theory, AIX has some timing problems and + when the user stack grows, kernel doesn't update stack info in time + and ptrace calls step on user stack. That is why we sleep here a + little, and give kernel to update its internals. */ - do { - /* We are allowed to assume CORE_ADDR == pointer. This code is - native only. */ - add_text_to_loadinfo ((CORE_ADDR) ldi->ldinfo_textorg, - (CORE_ADDR) ldi->ldinfo_dataorg); - } while (ldi->ldinfo_next - && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi))); + usleep (36000); -#if 0 - /* Now that we've jumbled things around, re-sort them. */ - sort_minimal_symbols (); -#endif - - /* relocate the exec and core sections as well. */ - vmap_exec (); + errno = 0; + rc = ptrace (PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi, + load_segs * sizeof (*ldi), (int *) ldi); + if (rc == -1) + { + if (errno == ENOMEM) + load_segs *= 2; + else + perror_with_name ("ptrace ldinfo"); + } + else + { + vmap_ldinfo (ldi); + vmap_exec (); /* relocate the exec and core sections as well. */ + } + } while (rc == -1); + if (ldi) + free (ldi); } /* Core file stuff. */ @@ -637,7 +673,8 @@ xcoff_relocate_symtab (pid) from the core file. */ void -xcoff_relocate_core () +xcoff_relocate_core (target) + struct target_ops *target; { /* Offset of member MEMBER in a struct of type TYPE. */ #ifndef offsetof @@ -656,13 +693,13 @@ xcoff_relocate_core () int buffer_size = LDINFO_SIZE; char *buffer = xmalloc (buffer_size); struct cleanup *old = make_cleanup (free_current_contents, &buffer); - + /* FIXME, this restriction should not exist. For now, though I'll avoid coredumps with error() pending a real fix. */ if (vmap == NULL) error ("Can't debug a core file without an executable file (on the RS/6000)"); - + ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); if (ldinfo_sec == NULL) { @@ -696,13 +733,14 @@ xcoff_relocate_core () goto bfd_err; if (buffer[i++] == '\0') ++names_found; - } while (names_found < 2); + } + while (names_found < 2); ldip = (struct ld_info *) buffer; /* Can't use a file descriptor from the core file; need to open it. */ ldip->ldinfo_fd = -1; - + /* The first ldinfo is for the exec file, allocated elsewhere. */ if (offset == 0) vp = vmap; @@ -717,50 +755,92 @@ xcoff_relocate_core () vp->dstart = (CORE_ADDR) ldip->ldinfo_dataorg; vp->dend = vp->dstart + ldip->ldinfo_datasize; - if (vp->tadj != 0) - { - vp->tstart += vp->tadj; - vp->tend += vp->tadj; - } + /* The run time loader maps the file header in addition to the text + section and returns a pointer to the header in ldinfo_textorg. + Adjust the text start address to point to the real start address + of the text section. */ + vp->tstart += vp->toffs; /* Unless this is the exec file, - add our sections to the section table for the core target. */ + add our sections to the section table for the core target. */ if (vp != vmap) { - int count; struct section_table *stp; - - count = core_ops.to_sections_end - core_ops.to_sections; - count += 2; - core_ops.to_sections = (struct section_table *) - xrealloc (core_ops.to_sections, - sizeof (struct section_table) * count); - core_ops.to_sections_end = core_ops.to_sections + count; - stp = core_ops.to_sections_end - 2; - - /* "Why do we add bfd_section_vma?", I hear you cry. - Well, the start of the section in the file is actually - that far into the section as the struct vmap understands it. - So for text sections, bfd_section_vma tends to be 0x200, - and if vp->tstart is 0xd0002000, then the first byte of - the text section on disk corresponds to address 0xd0002200. */ + + target_resize_to_sections (target, 2); + stp = target->to_sections_end - 2; + stp->bfd = vp->bfd; stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); - stp->addr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->tstart; - stp->endaddr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->tend; + stp->addr = vp->tstart; + stp->endaddr = vp->tend; stp++; - + stp->bfd = vp->bfd; stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); - stp->addr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->dstart; - stp->endaddr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->dend; + stp->addr = vp->dstart; + stp->endaddr = vp->dend; } vmap_symtab (vp); - - add_text_to_loadinfo ((CORE_ADDR)ldip->ldinfo_textorg, - (CORE_ADDR)ldip->ldinfo_dataorg); - } while (ldip->ldinfo_next != 0); + } + while (ldip->ldinfo_next != 0); vmap_exec (); + breakpoint_re_set (); do_cleanups (old); } + +int +kernel_u_size () +{ + return (sizeof (struct user)); +} + +/* Under AIX, we have to pass the correct TOC pointer to a function + when calling functions in the inferior. + We try to find the relative toc offset of the objfile containing PC + and add the current load address of the data segment from the vmap. */ + +static CORE_ADDR +find_toc_address (pc) + CORE_ADDR pc; +{ + struct vmap *vp; + + for (vp = vmap; vp; vp = vp->nxt) + { + if (pc >= vp->tstart && pc < vp->tend) + { + /* vp->objfile is only NULL for the exec file. */ + return vp->dstart + get_toc_offset (vp->objfile == NULL + ? symfile_objfile + : vp->objfile); + } + } + error ("Unable to find TOC entry for pc 0x%x\n", pc); +} + +/* Register that we are able to handle rs6000 core file formats. */ + +static struct core_fns rs6000_core_fns = +{ + bfd_target_coff_flavour, /* core_flavour */ + default_check_format, /* check_format */ + default_core_sniffer, /* core_sniffer */ + fetch_core_registers, /* core_read_registers */ + NULL /* next */ +}; + +void +_initialize_core_rs6000 () +{ + /* Initialize hook in rs6000-tdep.c for determining the TOC address when + calling functions in the inferior. */ + find_toc_address_hook = &find_toc_address; + + /* For native configurations, where this module is included, inform + the xcoffsolib module where it can find the function for symbol table + relocation at runtime. */ + xcoff_relocate_symtab_hook = &xcoff_relocate_symtab; + add_core_fns (&rs6000_core_fns); +}