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winecrt0: Reimplement __wine_rtl_unwind() as a proper asm function. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2019-05-14 13:27:38 +02:00
parent 9177a75acc
commit 351bd33069
2 changed files with 40 additions and 28 deletions
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62
dlls/winecrt0/exception.c
View File

@ -23,38 +23,50 @@
#include "wine/exception.h"
#include "wine/asm.h"
#ifdef __x86_64__
extern void __wine_unwind_trampoline(void);
/* we need an extra call to make sure the stack is correctly aligned */
__ASM_GLOBAL_FUNC( __wine_unwind_trampoline, "callq *%rax" );
#endif
#if defined(__GNUC__) && defined(__i386__)
/* wrapper for RtlUnwind since it clobbers registers on Windows */
void __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record,
__ASM_GLOBAL_FUNC( __wine_rtl_unwind,
"pushl %ebp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
"movl %esp,%ebp\n\t"
__ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
"subl $8,%esp\n\t"
"pushl $0\n\t" /* retval */
"pushl 12(%ebp)\n\t" /* record */
"pushl 16(%ebp)\n\t" /* target */
"pushl 8(%ebp)\n\t" /* frame */
"call " __ASM_NAME("RtlUnwind") __ASM_STDCALL(16) "\n\t"
"call *16(%ebp)" )
#elif defined(__GNUC__) && defined(__x86_64__)
__ASM_GLOBAL_FUNC( __wine_rtl_unwind,
"pushq %rbp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
__ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
"movq %rsp,%rbp\n\t"
__ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
"subq $0x20,%rsp\n\t"
"movq %r8,%r9\n\t" /* retval = final target */
"movq %rdx,%r8\n\t" /* record */
"leaq __wine_unwind_trampoline(%rip),%rdx\n\t" /* target = trampoline */
"call " __ASM_NAME("RtlUnwind") "\n"
"__wine_unwind_trampoline:\n\t"
/* we need an extra call to make sure the stack is correctly aligned */
"callq *%rax" )
#else
void __cdecl __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record,
void (*target)(void) )
{
#if defined(__GNUC__) && defined(__i386__)
int dummy1, dummy2, dummy3, dummy4;
__asm__ __volatile__("pushl %%ebp\n\t"
"pushl %%ebx\n\t"
"pushl $0\n\t"
"pushl %3\n\t"
"pushl %2\n\t"
"pushl %1\n\t"
"call *%0\n\t"
"popl %%ebx\n\t"
"popl %%ebp"
: "=a" (dummy1), "=S" (dummy2), "=D" (dummy3), "=c" (dummy4)
: "0" (RtlUnwind), "1" (frame), "2" (target), "3" (record)
: "edx", "memory" );
#elif defined(__x86_64__)
RtlUnwind( frame, __wine_unwind_trampoline, record, target );
#else
RtlUnwind( frame, target, record, 0 );
#endif
for (;;) target();
}
#endif
static void DECLSPEC_NORETURN unwind_target(void)
{
__WINE_FRAME *wine_frame = (__WINE_FRAME *)__wine_get_frame();

2
include/wine/exception.h
View File

@ -98,7 +98,7 @@ static inline int sigsetjmp( sigjmp_buf buf, int sigs ) { return setjmp( buf );
static inline void siglongjmp( sigjmp_buf buf, int val ) { longjmp( buf, val ); }
#endif
extern void __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record,
extern void __cdecl __wine_rtl_unwind( EXCEPTION_REGISTRATION_RECORD* frame, EXCEPTION_RECORD *record,
void (*target)(void) ) DECLSPEC_HIDDEN DECLSPEC_NORETURN;
extern DWORD __wine_exception_handler( EXCEPTION_RECORD *record,
EXCEPTION_REGISTRATION_RECORD *frame,