On Tue, 2009-10-27, Martin Schaller wrote in private E-mail :
> I have encountered a bug when compiling with profiling
> support (-pg).
> When the first profiled function is called, the program crashes.
> Reason is that in src/profile/profile/profile.h, function
> _mcount the lr register gets overwritten which is not
> expected by the compiler. Instead of returning to the
> calling function then _mcount returns to the return address
> of mcount_internal, creating an endless loop and finally
> crashing when the stack gets out of range.
>
> As a fix add lr to the register list in stmdb and ldmia.
This is what you mean ?
Danny
--
Danny Backx ; danny.backx - at - scarlet.be ; http://danny.backx.info
Index: profile.h
===================================================================
--- profile.h (revision 1225)
+++ profile.h (working copy)
@@ -89,7 +89,7 @@
#define MCOUNT \
void _mcount (void) \
{ \
- __asm__("stmdb sp!, {r0, r1, r2, r3};" \
+ __asm__("stmdb sp!, {r0, r1, r2, r3, lr};" \
"movs fp, fp;" \
"moveq r1, #0;" \
"ldrne r1, [fp, $-4];" \
@@ -98,7 +98,7 @@
"ldrne r0, [r0, $-4];" \
"movs r0, r0;" \
"blne mcount_internal;" \
- "ldmia sp!, {r0, r1, r2, r3}"); \
+ "ldmia sp!, {r0, r1, r2, r3, lr}"); \
}
#else
/***************************************************************************
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