163 lines
4.7 KiB
C
163 lines
4.7 KiB
C
/* BFD back end for traditional Unix core files (U-area and sections, raw)
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Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc. */
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/* This file does not define a particular back-end, but it defines routines
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that can be used by other back-ends. */
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#include <sysdep.h>
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#include "bfd.h"
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#include <stdio.h>
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#include "libbfd.h"
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#include "libaout.h" /* BFD a.out internal data structures */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <machine/reg.h>
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#include <sys/user.h> /* After a.out.h */
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <errno.h>
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/* need this cast b/c ptr is really void * */
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#define core_hdr(bfd) (((struct core_data *) (bfd->tdata))->hdr)
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#define core_datasec(bfd) (((struct core_data *) ((bfd)->tdata))->data_section)
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#define core_stacksec(bfd) (((struct core_data*)((bfd)->tdata))->stack_section)
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#define core_regsec(bfd) (((struct core_data *) ((bfd)->tdata))->reg_section)
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#define core_upage(bfd) (((struct core_data *) ((bfd)->tdata))->upage)
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/* These are stored in the bfd's tdata */
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struct core_data {
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struct user *upage; /* core file header */
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asection *data_section;
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asection *stack_section;
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asection *reg_section;
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};
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/* ARGSUSED */
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bfd_target *
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trad_unix_core_file_p (abfd)
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bfd *abfd;
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{
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#if HOST_SYS == SUN_SYS
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return 0;
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#else
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int val;
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char *rawptr;
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struct user u;
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unsigned int reg_offset, fp_reg_offset;
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/* 4.2-style (and perhaps also sysV-style) core dump file. */
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val = bfd_read ((void *)&u, 1, sizeof u, abfd);
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if (val != sizeof u)
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return 0; /* Too small to be a core file */
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/* Sanity check perhaps??? */
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if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
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return 0;
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if (u.u_ssize > 0x1000000)
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return 0;
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/* Check that the size claimed is no greater than the file size. FIXME. */
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/* OK, we believe you. You're a core file (sure, sure). */
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/* Allocate both the upage and the struct core_data at once, so
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a single free() will free them both. */
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rawptr = (char *)zalloc (sizeof (u) + sizeof (struct core_data));
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if (rawptr == NULL) {
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bfd_error = no_memory;
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return 0;
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}
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set_tdata (abfd, (struct core_data *)rawptr);
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core_upage (abfd) = (struct user *)(rawptr + sizeof (struct core_data));
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*core_upage (abfd) = u; /* Save that upage! */
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/* create the sections. This is raunchy, but bfd_close wants to reclaim
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them */
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core_stacksec (abfd) = (asection *) zalloc (sizeof (asection));
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if (core_stacksec (abfd) == NULL) {
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loser:
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bfd_error = no_memory;
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free ((void *)rawptr);
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return 0;
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}
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core_datasec (abfd) = (asection *) zalloc (sizeof (asection));
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if (core_datasec (abfd) == NULL) {
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loser1:
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free ((void *)core_stacksec (abfd));
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goto loser;
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}
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core_regsec (abfd) = (asection *) zalloc (sizeof (asection));
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if (core_regsec (abfd) == NULL) {
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loser2:
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free ((void *)core_datasec (abfd));
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goto loser1;
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}
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core_stacksec (abfd)->name = ".stack";
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core_datasec (abfd)->name = ".data";
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core_regsec (abfd)->name = ".reg";
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core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD;
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core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD;
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core_regsec (abfd)->flags = SEC_ALLOC;
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core_datasec (abfd)->size = NBPG * u.u_dsize;
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core_stacksec (abfd)->size = NBPG * u.u_ssize;
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core_regsec (abfd)->size = NBPG * UPAGES; /* Larger than sizeof struct u */
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/* What a hack... we'd like to steal it from the exec file,
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since the upage does not seem to provide it. FIXME. */
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core_datasec (abfd)->vma = TEXT_START_ADDR + (NBPG * u.u_tsize);
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core_stacksec (abfd)->vma = STACK_END_ADDR - (NBPG * u.u_ssize);
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core_regsec (abfd)->vma = -1;
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core_datasec (abfd)->filepos = NBPG * UPAGES;
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core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize;
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core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
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/* Align to word at least */
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core_stacksec (abfd)->alignment_power = 2;
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core_datasec (abfd)->alignment_power = 2;
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core_regsec (abfd)->alignment_power = 2;
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abfd->sections = core_stacksec (abfd);
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core_stacksec (abfd)->next = core_datasec (abfd);
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core_datasec (abfd)->next = core_regsec (abfd);
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abfd->section_count = 3;
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return abfd->xvec;
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#endif
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}
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char *
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trad_unix_core_file_failing_command (abfd)
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bfd *abfd;
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{
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if (*core_upage (abfd)->u_comm)
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return core_upage (abfd)->u_comm;
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else
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return 0;
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}
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/* ARGSUSED */
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int
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trad_unix_core_file_failing_signal (ignore_abfd)
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bfd *ignore_abfd;
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{
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return -1; /* FIXME, where is it? */
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}
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/* ARGSUSED */
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boolean
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trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
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bfd *core_bfd, *exec_bfd;
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{
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return true; /* FIXME, We have no way of telling at this point */
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}
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