/* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
- Copyright 1986, 1987, 1989, 1991, 1992, 1994, 1995, 1996
+ Copyright 1986, 1987, 1989, 1991, 1992, 1994, 1995, 1996, 1997, 1998
Free Software Foundation, Inc.
This file is part of GDB.
extern struct target_ops exec_ops;
static void
-exec_one_dummy_insn PARAMS ((void));
+vmap_exec PARAMS ((void));
-extern void
-add_text_to_loadinfo PARAMS ((CORE_ADDR textaddr, CORE_ADDR dataaddr));
+static void
+vmap_ldinfo PARAMS ((struct ld_info *));
+
+static struct vmap *
+add_vmap PARAMS ((struct ld_info *));
+
+static int
+objfile_symbol_add PARAMS ((char *));
+
+static void
+vmap_symtab PARAMS ((struct vmap *));
+
+static void
+fetch_core_registers PARAMS ((char *, unsigned int, int, CORE_ADDR));
+
+static void
+exec_one_dummy_insn PARAMS ((void));
extern void
fixup_breakpoints PARAMS ((CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta));
#define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200
char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */
- unsigned int status, pid;
+ int status, pid;
CORE_ADDR prev_pc;
/* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We assume that
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. */
register struct vmap *vp;
{
register struct objfile *objfile;
- CORE_ADDR text_delta;
- CORE_ADDR data_delta;
- CORE_ADDR bss_delta;
struct section_offsets *new_offsets;
int i;
for (i = 0; i < objfile->num_sections; ++i)
ANOFFSET (new_offsets, i) = ANOFFSET (objfile->section_offsets, i);
- text_delta =
- vp->tstart - ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT);
- ANOFFSET (new_offsets, SECT_OFF_TEXT) = vp->tstart;
-
- data_delta =
- vp->dstart - ANOFFSET (objfile->section_offsets, SECT_OFF_DATA);
- ANOFFSET (new_offsets, SECT_OFF_DATA) = vp->dstart;
-
- bss_delta =
- vp->dstart - ANOFFSET (objfile->section_offsets, SECT_OFF_BSS);
- ANOFFSET (new_offsets, SECT_OFF_BSS) = vp->dstart;
+ /* The symbols in the object file are linked to the VMA of the section,
+ relocate them VMA relative. */
+ ANOFFSET (new_offsets, SECT_OFF_TEXT) = vp->tstart - vp->tvma;
+ ANOFFSET (new_offsets, SECT_OFF_DATA) = vp->dstart - vp->dvma;
+ ANOFFSET (new_offsets, SECT_OFF_BSS) = vp->dstart - vp->dvma;
objfile_relocate (objfile, new_offsets);
}
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))
struct stat ii, vi;
register struct vmap *vp;
int got_one, retried;
- int got_exec_file;
+ int got_exec_file = 0;
/* For each *ldi, see if we have a corresponding *vp.
If so, update the mapping, and symbol table.
retried = 0;
if (fstat (ldi->ldinfo_fd, &ii) < 0)
- fatal ("cannot fstat(fd=%d) on %s", ldi->ldinfo_fd, name);
+ {
+ /* 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, fins its `vp' and so on... */
+ (add_vmap) and come back, find its `vp' and so on... */
/* The filenames are not always sufficient to match on. */
|| (memb[0] && !STREQ(memb, vp->member)))
continue;
- /* See if we are referring to the same file. */
- if (bfd_stat (vp->bfd, &vi) < 0)
- /* An error here is innocuous, most likely meaning that
- the file descriptor has become worthless.
- FIXME: What does it mean for a file descriptor to become
- "worthless"? What makes it happen? What error does it
- produce (ENOENT? others?)? Should we at least provide
- a warning? */
- 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;
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;
/* The objfile is only NULL for the exec file. */
if (vp->objfile == NULL)
got_exec_file = 1;
-#ifdef DONT_RELOCATE_SYMFILE_OBJFILE
- if (vp->objfile == symfile_objfile
- || vp->objfile == NULL)
- {
- ldi->ldinfo_dataorg = 0;
- vp->dstart = (CORE_ADDR) 0;
- vp->dend = ldi->ldinfo_datasize;
- }
-#endif
-
/* relocate symbol table(s). */
vmap_symtab (vp);
{
if (STREQ(".text", 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->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->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;
+ }
+ else if (STREQ(".bss", exec_ops.to_sections[i].the_bfd_section->name))
+ {
+ exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
+ exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
}
}
}
errno = 0;
ptrace (PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi,
- MAX_LOAD_SEGS * sizeof(*ldi), ldi);
+ MAX_LOAD_SEGS * sizeof(*ldi), (int *) ldi);
if (errno)
perror_with_name ("ptrace ldinfo");
vmap_ldinfo (ldi);
- 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)));
-
-#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 ();
}
vp->dstart = (CORE_ADDR) ldip->ldinfo_dataorg;
vp->dend = vp->dstart + ldip->ldinfo_datasize;
-#ifdef DONT_RELOCATE_SYMFILE_OBJFILE
- if (vp == vmap)
- {
- vp->dstart = (CORE_ADDR) 0;
- vp->dend = ldip->ldinfo_datasize;
- }
-#endif
-
- 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. */
}
stp = target->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. */
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);
vmap_exec ();
breakpoint_re_set ();
{
return (sizeof (struct user));
}
+\f
+/* 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);
+}
\f
/* Register that we are able to handle rs6000 core file formats. */
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);
}