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ARM: prefer to unwind using DWARF info

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In case the user doesn't specify whether to unwind using the ARM specific
unwind tabler or DWARF info libunwind should prefer the latter. Since DWARF
expressions are more powerful than the ARM specific unwind tables
arm_find_proc_info is changed to check for DWARF first.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
This commit is contained in:
Ken Werner 2011-08-29 14:36:27 +00:00
parent 912db91b05
commit 92327a3647
1 changed files with 21 additions and 21 deletions
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42
src/arm/Gex_tables.c
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@ -507,27 +507,7 @@ arm_find_proc_info (unw_addr_space_t as, unw_word_t ip,
Debug (14, "looking for IP=0x%lx\n", (long) ip);
if (UNW_TRY_METHOD (UNW_ARM_METHOD_EXIDX))
{
struct arm_cb_data cb_data;
memset (&cb_data, 0, sizeof (cb_data));
cb_data.ip = ip;
cb_data.pi = pi;
cb_data.di.format = -1;
SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &saved_mask);
ret = dl_iterate_phdr (arm_phdr_cb, &cb_data);
SIGPROCMASK (SIG_SETMASK, &saved_mask, NULL);
if (cb_data.di.format != -1)
ret = tdep_search_unwind_table (as, ip, &cb_data.di, pi,
need_unwind_info, arg);
else
ret = -UNW_ENOINFO;
}
if (ret < 0 && UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF))
if (UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF))
{
struct dwarf_callback_data cb_data;
@ -553,6 +533,26 @@ arm_find_proc_info (unw_addr_space_t as, unw_word_t ip,
ret = -UNW_ENOINFO;
}
if (ret < 0 && UNW_TRY_METHOD (UNW_ARM_METHOD_EXIDX))
{
struct arm_cb_data cb_data;
memset (&cb_data, 0, sizeof (cb_data));
cb_data.ip = ip;
cb_data.pi = pi;
cb_data.di.format = -1;
SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &saved_mask);
ret = dl_iterate_phdr (arm_phdr_cb, &cb_data);
SIGPROCMASK (SIG_SETMASK, &saved_mask, NULL);
if (cb_data.di.format != -1)
ret = tdep_search_unwind_table (as, ip, &cb_data.di, pi,
need_unwind_info, arg);
else
ret = -UNW_ENOINFO;
}
if (ret < 0)
Debug (14, "IP=0x%lx not found\n", (long) ip);