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Compile only if UNW_REMOTE_ONLY is not defined.

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(get_kernel_table): Return -UNW_ENOMEM if unable to allocate buffer
	for kernel's unwind info.  Initialize the start and end
	members in unw_ia64_table_t.
(callback): Initialize the start and end members.

(Logical change 1.5)
This commit is contained in:
(none)!davidm 2002-02-22 21:58:53 +00:00
parent 4588bf926d
commit fb5ed0d939
1 changed files with 21 additions and 15 deletions
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36
src/ia64/tables-glibc.c
View file

@ -27,6 +27,8 @@ License. */
Copyright (C) 2000, 2001 Free Software Foundation, Inc. Copyright (C) 2000, 2001 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@cygnus.com>. */ Contributed by Richard Henderson <rth@cygnus.com>. */
#ifndef UNW_REMOTE_ONLY
#include <link.h> #include <link.h>
#include <stddef.h> #include <stddef.h>
#include <stdlib.h> #include <stdlib.h>
@ -74,16 +76,17 @@ get_kernel_table (void *ptr)
ktab = malloc (size); ktab = malloc (size);
if (!ktab) if (!ktab)
{ {
dprintf (__FILE__".%s: failed to allocated %Zu bytes", dprintf (__FILE__".%s: failed to allocate %Zu bytes",
__FUNCTION__, size); __FUNCTION__, size);
return -1; return -UNW_ENOMEM;
} }
getunwind (ktab, size); getunwind (ktab, size);
/* Determine length of kernel's unwind table. */ /* Determine length of kernel's unwind table. */
for (etab = ktab; etab->start_offset; ++etab); for (etab = ktab; etab->start_offset; ++etab);
if (info->segbase < ktab->start_offset || info->segbase >= ktab->end_offset) if (info->segbase < ktab[0].start_offset
|| info->segbase >= etab[-1].end_offset)
{ {
free (ktab); free (ktab);
return -1; return -1;
@ -92,6 +95,8 @@ get_kernel_table (void *ptr)
info->name = "<kernel>"; info->name = "<kernel>";
info->gp = 0; info->gp = 0;
info->segbase = 0; info->segbase = 0;
info->start = ktab[0].start_offset;
info->end = etab[-1].end_offset;
info->length = etab - ktab; info->length = etab - ktab;
info->array = ktab; info->array = ktab;
info->unwind_info_base = (const u_int8_t *) ktab; info->unwind_info_base = (const u_int8_t *) ktab;
@ -106,9 +111,9 @@ static int
callback (struct dl_phdr_info *info, size_t size, void *ptr) callback (struct dl_phdr_info *info, size_t size, void *ptr)
{ {
unw_ia64_table_t *data = ptr; unw_ia64_table_t *data = ptr;
const Elf64_Phdr *phdr, *p_unwind, *p_dynamic; const Elf64_Phdr *phdr, *p_unwind, *p_dynamic, *p_text;
long n, match; long n;
Elf64_Addr load_base, segbase; Elf64_Addr load_base;
/* Make sure struct dl_phdr_info is at least as big as we need. */ /* Make sure struct dl_phdr_info is at least as big as we need. */
if (size < offsetof (struct dl_phdr_info, dlpi_phnum) if (size < offsetof (struct dl_phdr_info, dlpi_phnum)
@ -117,12 +122,11 @@ callback (struct dl_phdr_info *info, size_t size, void *ptr)
debug (100, "unwind: checking `%s'\n", info->dlpi_name); debug (100, "unwind: checking `%s'\n", info->dlpi_name);
match = 0;
phdr = info->dlpi_phdr; phdr = info->dlpi_phdr;
load_base = info->dlpi_addr; load_base = info->dlpi_addr;
p_text = NULL;
p_unwind = NULL; p_unwind = NULL;
p_dynamic = NULL; p_dynamic = NULL;
segbase = ~(Elf64_Addr) 0;
/* See if PC falls into one of the loaded segments. Find the unwind /* See if PC falls into one of the loaded segments. Find the unwind
segment at the same time. */ segment at the same time. */
@ -132,16 +136,14 @@ callback (struct dl_phdr_info *info, size_t size, void *ptr)
{ {
Elf64_Addr vaddr = phdr->p_vaddr + load_base; Elf64_Addr vaddr = phdr->p_vaddr + load_base;
if (data->segbase >= vaddr && data->segbase < vaddr + phdr->p_memsz) if (data->segbase >= vaddr && data->segbase < vaddr + phdr->p_memsz)
match = 1; p_text = phdr;
if (vaddr < segbase)
segbase = vaddr;
} }
else if (phdr->p_type == PT_IA_64_UNWIND) else if (phdr->p_type == PT_IA_64_UNWIND)
p_unwind = phdr; p_unwind = phdr;
else if (phdr->p_type == PT_DYNAMIC) else if (phdr->p_type == PT_DYNAMIC)
p_dynamic = phdr; p_dynamic = phdr;
} }
if (!match || !p_unwind) if (!p_text || !p_unwind)
return 0; return 0;
if (p_dynamic) if (p_dynamic)
@ -166,10 +168,12 @@ callback (struct dl_phdr_info *info, size_t size, void *ptr)
} }
data->name = info->dlpi_name; data->name = info->dlpi_name;
data->array data->array
= (const struct ia64_unwind_table_entry *) (p_unwind->p_vaddr + load_base); = (struct ia64_unwind_table_entry *) (p_unwind->p_vaddr + load_base);
data->length = p_unwind->p_memsz / sizeof (struct ia64_unwind_table_entry); data->length = p_unwind->p_memsz / sizeof (struct ia64_unwind_table_entry);
data->segbase = segbase; data->segbase = p_text->p_vaddr + load_base;
data->unwind_info_base = (const u_int8_t *) segbase; data->start = p_text->p_vaddr + load_base;
data->end = p_text->p_vaddr + load_base + p_text->p_memsz;
data->unwind_info_base = (const u_int8_t *) data->segbase;
debug (100, "unwind: found table `%s': segbase=%lx, length=%lu, gp=%lx, " debug (100, "unwind: found table `%s': segbase=%lx, length=%lu, gp=%lx, "
"array=%p\n", data->name, data->segbase, data->length, data->gp, "array=%p\n", data->name, data->segbase, data->length, data->gp,
@ -195,3 +199,5 @@ ia64_glibc_release_unwind_info (void *info, void *arg)
/* nothing to do */ /* nothing to do */
return 0; return 0;
} }
#endif /* !UNW_REMOTE_ONLY */