/* libunwind - a platform-independent unwind library
Copyright (C) 2003-2004 Hewlett-Packard Co
- Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+ Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
This file is part of libunwind.
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
-#include <elf.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
int
dwarf_find_unwind_table (struct elf_dyn_info *edi, unw_addr_space_t as,
- char *path, unw_word_t segbase, unw_word_t mapoff,
- unw_word_t ip)
+ char *path, unw_word_t segbase, unw_word_t mapoff,
+ unw_word_t ip)
{
Elf_W(Phdr) *phdr, *ptxt = NULL, *peh_hdr = NULL, *pdyn = NULL;
unw_word_t addr, eh_frame_start, fde_count, load_base;
for (i = 0; i < ehdr->e_phnum; ++i)
{
switch (phdr[i].p_type)
- {
- case PT_LOAD:
- if (phdr[i].p_vaddr < start_ip)
- start_ip = phdr[i].p_vaddr;
+ {
+ case PT_LOAD:
+ if (phdr[i].p_vaddr < start_ip)
+ start_ip = phdr[i].p_vaddr;
- if (phdr[i].p_vaddr + phdr[i].p_memsz > end_ip)
- end_ip = phdr[i].p_vaddr + phdr[i].p_memsz;
+ if (phdr[i].p_vaddr + phdr[i].p_memsz > end_ip)
+ end_ip = phdr[i].p_vaddr + phdr[i].p_memsz;
- if (phdr[i].p_offset == mapoff)
- ptxt = phdr + i;
- if ((uintptr_t) edi->ei.image + phdr->p_filesz > max_load_addr)
- max_load_addr = (uintptr_t) edi->ei.image + phdr->p_filesz;
- break;
+ if (phdr[i].p_offset == mapoff)
+ ptxt = phdr + i;
+ if ((uintptr_t) edi->ei.image + phdr->p_filesz > max_load_addr)
+ max_load_addr = (uintptr_t) edi->ei.image + phdr->p_filesz;
+ break;
- case PT_GNU_EH_FRAME:
- peh_hdr = phdr + i;
- break;
+ case PT_GNU_EH_FRAME:
+ peh_hdr = phdr + i;
+ break;
- case PT_DYNAMIC:
- pdyn = phdr + i;
- break;
+ case PT_DYNAMIC:
+ pdyn = phdr + i;
+ break;
#if UNW_TARGET_ARM
- case PT_ARM_EXIDX:
- parm_exidx = phdr + i;
- break;
+ case PT_ARM_EXIDX:
+ parm_exidx = phdr + i;
+ break;
#endif
- default:
- break;
- }
+ default:
+ break;
+ }
}
if (!ptxt)
if (peh_hdr)
{
if (pdyn)
- {
- /* For dynamicly linked executables and shared libraries,
- DT_PLTGOT is the value that data-relative addresses are
- relative to for that object. We call this the "gp". */
- Elf_W(Dyn) *dyn = (Elf_W(Dyn) *)(pdyn->p_offset
- + (char *) edi->ei.image);
- for (; dyn->d_tag != DT_NULL; ++dyn)
- if (dyn->d_tag == DT_PLTGOT)
- {
- /* Assume that _DYNAMIC is writable and GLIBC has
- relocated it (true for x86 at least). */
- edi->di_cache.gp = dyn->d_un.d_ptr;
- break;
- }
- }
+ {
+ /* For dynamicly linked executables and shared libraries,
+ DT_PLTGOT is the value that data-relative addresses are
+ relative to for that object. We call this the "gp". */
+ Elf_W(Dyn) *dyn = (Elf_W(Dyn) *)(pdyn->p_offset
+ + (char *) edi->ei.image);
+ for (; dyn->d_tag != DT_NULL; ++dyn)
+ if (dyn->d_tag == DT_PLTGOT)
+ {
+ /* Assume that _DYNAMIC is writable and GLIBC has
+ relocated it (true for x86 at least). */
+ edi->di_cache.gp = dyn->d_un.d_ptr;
+ break;
+ }
+ }
else
- /* Otherwise this is a static executable with no _DYNAMIC. Assume
- that data-relative addresses are relative to 0, i.e.,
- absolute. */
- edi->di_cache.gp = 0;
+ /* Otherwise this is a static executable with no _DYNAMIC. Assume
+ that data-relative addresses are relative to 0, i.e.,
+ absolute. */
+ edi->di_cache.gp = 0;
hdr = (struct dwarf_eh_frame_hdr *) (peh_hdr->p_offset
- + (char *) edi->ei.image);
+ + (char *) edi->ei.image);
if (hdr->version != DW_EH_VERSION)
- {
- Debug (1, "table `%s' has unexpected version %d\n",
- path, hdr->version);
- return -UNW_ENOINFO;
- }
+ {
+ Debug (1, "table `%s' has unexpected version %d\n",
+ path, hdr->version);
+ return -UNW_ENOINFO;
+ }
a = unw_get_accessors (unw_local_addr_space);
addr = (unw_word_t) (hdr + 1);
/* Fill in a dummy proc_info structure. We just need to fill in
- enough to ensure that dwarf_read_encoded_pointer() can do it's
- job. Since we don't have a procedure-context at this point, all
- we have to do is fill in the global-pointer. */
+ enough to ensure that dwarf_read_encoded_pointer() can do it's
+ job. Since we don't have a procedure-context at this point, all
+ we have to do is fill in the global-pointer. */
memset (&pi, 0, sizeof (pi));
pi.gp = edi->di_cache.gp;
/* (Optionally) read eh_frame_ptr: */
if ((ret = dwarf_read_encoded_pointer (unw_local_addr_space, a,
- &addr, hdr->eh_frame_ptr_enc, &pi,
- &eh_frame_start, NULL)) < 0)
- return -UNW_ENOINFO;
+ &addr, hdr->eh_frame_ptr_enc, &pi,
+ &eh_frame_start, NULL)) < 0)
+ return -UNW_ENOINFO;
/* (Optionally) read fde_count: */
if ((ret = dwarf_read_encoded_pointer (unw_local_addr_space, a,
- &addr, hdr->fde_count_enc, &pi,
- &fde_count, NULL)) < 0)
- return -UNW_ENOINFO;
+ &addr, hdr->fde_count_enc, &pi,
+ &fde_count, NULL)) < 0)
+ return -UNW_ENOINFO;
if (hdr->table_enc != (DW_EH_PE_datarel | DW_EH_PE_sdata4))
- {
+ {
#if 1
- abort ();
+ abort ();
#else
- unw_word_t eh_frame_end;
-
- /* If there is no search table or it has an unsupported
- encoding, fall back on linear search. */
- if (hdr->table_enc == DW_EH_PE_omit)
- Debug (4, "EH lacks search table; doing linear search\n");
- else
- Debug (4, "EH table has encoding 0x%x; doing linear search\n",
- hdr->table_enc);
-
- eh_frame_end = max_load_addr; /* XXX can we do better? */
-
- if (hdr->fde_count_enc == DW_EH_PE_omit)
- fde_count = ~0UL;
- if (hdr->eh_frame_ptr_enc == DW_EH_PE_omit)
- abort ();
-
- return linear_search (unw_local_addr_space, ip,
- eh_frame_start, eh_frame_end, fde_count,
- pi, need_unwind_info, NULL);
+ unw_word_t eh_frame_end;
+
+ /* If there is no search table or it has an unsupported
+ encoding, fall back on linear search. */
+ if (hdr->table_enc == DW_EH_PE_omit)
+ Debug (4, "EH lacks search table; doing linear search\n");
+ else
+ Debug (4, "EH table has encoding 0x%x; doing linear search\n",
+ hdr->table_enc);
+
+ eh_frame_end = max_load_addr; /* XXX can we do better? */
+
+ if (hdr->fde_count_enc == DW_EH_PE_omit)
+ fde_count = ~0UL;
+ if (hdr->eh_frame_ptr_enc == DW_EH_PE_omit)
+ abort ();
+
+ return linear_search (unw_local_addr_space, ip,
+ eh_frame_start, eh_frame_end, fde_count,
+ pi, need_unwind_info, NULL);
#endif
- }
+ }
edi->di_cache.start_ip = start_ip;
edi->di_cache.end_ip = end_ip;
/* two 32-bit values (ip_offset/fde_offset) per table-entry: */
edi->di_cache.u.rti.table_len = (fde_count * 8) / sizeof (unw_word_t);
edi->di_cache.u.rti.table_data = ((load_base + peh_hdr->p_vaddr)
- + (addr - (unw_word_t) edi->ei.image
- - peh_hdr->p_offset));
+ + (addr - (unw_word_t) edi->ei.image
+ - peh_hdr->p_offset));
/* For the binary-search table in the eh_frame_hdr, data-relative
- means relative to the start of that section... */
+ means relative to the start of that section... */
edi->di_cache.u.rti.segbase = ((load_base + peh_hdr->p_vaddr)
- + ((unw_word_t) hdr - (unw_word_t) edi->ei.image
- - peh_hdr->p_offset));
+ + ((unw_word_t) hdr - (unw_word_t) edi->ei.image
+ - peh_hdr->p_offset));
found = 1;
}
#ifdef CONFIG_DEBUG_FRAME
/* Try .debug_frame. */
found = dwarf_find_debug_frame (found, &edi->di_debug, ip, load_base, path,
- start_ip, end_ip);
+ start_ip, end_ip);
#endif
return found;
projects / platform / upstream / libunwind.git / blobdiff