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* config/i386/profile.h: Sync with Mingw.

This commit is contained in:
Corinna Vinschen 2011-02-14 09:42:19 +00:00
parent 6148be0f22
commit 4655360348
2 changed files with 34 additions and 5 deletions
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4
winsup/cygwin/ChangeLog
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@ -1,3 +1,7 @@
2011-02-14 Corinna Vinschen <corinna@vinschen.de>
* config/i386/profile.h: Sync with Mingw.
2011-02-13 Corinna Vinschen <corinna@vinschen.de> 2011-02-13 Corinna Vinschen <corinna@vinschen.de>
* path.cc (struct _FAST_CWD): Redefine to new layout used since patch * path.cc (struct _FAST_CWD): Redefine to new layout used since patch

35
winsup/cygwin/config/i386/profile.h
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@ -35,24 +35,49 @@
* @(#)profile.h 8.1 (Berkeley) 6/11/93 * @(#)profile.h 8.1 (Berkeley) 6/11/93
*/ */
#define _MCOUNT_DECL static inline void _mcount /*
* This file is taken from Cygwin distribution. Please keep it in sync.
* The differences should be within __MINGW32__ guard.
*/
/* If compiler doesn't inline, at least avoid passing args on the stack. */
#define _MCOUNT_CALL __attribute__ ((regparm (2)))
#define _MCOUNT_DECL static __inline__ void _MCOUNT_CALL _mcount
/* FIXME: This works, but it would be cleaner to convert mcount into an
assembler stub that calls an extern _mcount.
Older versions of GCC (pre-4.1) will still fail with regparm since the
compiler used %edx to store an unneeded counter variable. */
#define MCOUNT \ #define MCOUNT \
void \ void \
mcount() \ mcount() \
{ \ { \
int selfpc, frompcindex; \ u_long selfpc, frompcindex; \
/* \
* Save registers, since this may be called from \
* the prologue of a regparm function. \
*/ \
__asm __volatile__ ("pushl %eax\n\t" \
"pushl %ecx\n\t" \
"pushl %edx"); \
/* \ /* \
* find the return address for mcount, \ * find the return address for mcount, \
* and the return address for mcount's caller. \ * and the return address for mcount's caller. \
* \ * \
* selfpc = pc pushed by mcount call \ * selfpc = pc pushed by mcount call \
*/ \ */ \
__asm __volatile ("movl 4(%%ebp),%0" : "=r" (selfpc)); \ /* __asm ("movl 4(%%ebp),%0" : "=r" (selfpc)); */ \
selfpc = (u_long) __builtin_return_address (0); \
/* \ /* \
* frompcindex = pc pushed by call into self. \ * frompcindex = pc pushed by call into self. \
*/ \ */ \
__asm __volatile ("movl (%%ebp),%0;movl 4(%0),%0" : "=r" (frompcindex));\ /* __asm ("movl (%%ebp),%0;movl 4(%0),%0" : "=r" (frompcindex)); */ \
frompcindex = (u_long) __builtin_return_address (1); \
_mcount(frompcindex, selfpc); \ _mcount(frompcindex, selfpc); \
/* \
* Restore registers. \
*/ \
__asm __volatile__ ("popl %edx\n\t" \
"popl %ecx\n\t" \
"popl %eax"); \
} }