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Prefer to unwind using DWARF info on ARM.

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DWARF expressions are more powerful than the ARM specific unwind tables.
Therefore DWARF should be the preferred unwind method.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
This commit is contained in:
Ken Werner 2011-03-23 15:55:02 +00:00 committed by Arun Sharma
parent fb325c895e
commit dcb8d0d90f
1 changed files with 13 additions and 10 deletions
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23
src/arm/Gstep.c
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@ -76,16 +76,7 @@ unw_step (unw_cursor_t *cursor)
Debug (1, "(cursor=%p)\n", c);
if (UNW_TRY_METHOD (UNW_ARM_METHOD_EXIDX))
{
ret = arm_exidx_step (c);
if (ret >= 0)
return 1;
if (ret == -UNW_ESTOPUNWIND)
return 0;
}
/* Next, try DWARF-based unwinding. */
/* First, try DWARF-based unwinding. */
if (UNW_TRY_METHOD(UNW_ARM_METHOD_DWARF))
{
ret = dwarf_step (&c->dwarf);
@ -101,6 +92,18 @@ unw_step (unw_cursor_t *cursor)
}
}
/* Next, try extbl-based unwinding. */
if (UNW_TRY_METHOD (UNW_ARM_METHOD_EXIDX))
{
ret = arm_exidx_step (c);
if (ret >= 0)
return 1;
if (ret == -UNW_ESTOPUNWIND)
return 0;
}
/* Fall back on APCS frame parsing.
Note: This won't work in case the ARM EABI is used. */
if (unlikely (ret < 0))
{
if (UNW_TRY_METHOD(UNW_ARM_METHOD_FRAME))