win32: register SEH in startup code (i386 only)

Needed to handle signal() etc. with msvcrt

grischka committed 16 years ago

Commit 92288421 parent 036d9414 files · +126 −2Browse files

Unified · Split

4 files

win32/include/_mingw.h +2 −0
win32/lib/chkstk.S +122 −0
win32/lib/crt1.c +1 −2
win32/lib/wincrt1.c +1 −0

 #define __x86_64 1
 #define USE_MINGW_SETJMP_TWO_ARGS
 #define mingw_getsp tinyc_getbp
+#define __TRY__
 #else
 #define __stdcall __attribute__((__stdcall__))
 #define _X86_ 1
 #define WIN32 1
 #define _USE_32BIT_TIME_T
+#define __TRY__ void __try__(void**), *_sehrec[6]; __try__(_sehrec);
 #endif
 /* in stddef.h */

win32/lib/chkstk.S+122−0

@@ -75,3 +75,125 @@ t1: · 74 unmodified lines
75	/* ---------------------------------------------- */	75	/* ---------------------------------------------- */
76	#endif	76	#endif
77	/* ---------------------------------------------- */	77	/* ---------------------------------------------- */
		78
		79
		80	/* ---------------------------------------------- */
		81	#ifndef TCC_TARGET_X86_64
		82	/* ---------------------------------------------- */
		83
		84	/*
		85	int _except_handler3(
		86	PEXCEPTION_RECORD exception_record,
		87	PEXCEPTION_REGISTRATION registration,
		88	PCONTEXT context,
		89	PEXCEPTION_REGISTRATION dispatcher
		90	);
		91
		92	int __cdecl _XcptFilter(
		93	unsigned long xcptnum,
		94	PEXCEPTION_POINTERS pxcptinfoptrs
		95	);
		96
		97	struct _sehrec {
		98	void *esp; // 0
		99	void *exception_pointers; // 1
		100	void *prev; // 2
		101	void *handler; // 3
		102	void *scopetable; // 4
		103	int trylevel; // 5
		104	void *ebp // 6
		105	};
		106
		107	// this is what the assembler code below means:
		108	__try
		109	{
		110	// ...
		111	}
		112	__except (_XcptFilter(GetExceptionCode(), GetExceptionInformation()))
		113	{
		114	exit(GetExceptionCode());
		115	}
		116	*/
		117
		118	.globl _exception_info
		119	_exception_info:
		120	mov 1*4-24(%ebp),%eax
		121	ret
		122
		123	.globl _exception_code
		124	_exception_code:
		125	call _exception_info
		126	mov (%eax),%eax
		127	mov (%eax),%eax
		128	ret
		129
		130	seh_filter:
		131	call _exception_info
		132	push %eax
		133	call _exception_code
		134	push %eax
		135	call _XcptFilter
		136	add $ 8,%esp
		137	ret
		138
		139	seh_except:
		140	mov 0*4-24(%ebp),%esp
		141	call _exception_code
		142	push %eax
		143	call _exit
		144
		145	// msvcrt wants scopetables aligned and in read-only segment (using .text)
		146	.align 4
		147	seh_scopetable:
		148	.long -1
		149	.long seh_filter
		150	.long seh_except
		151
		152	seh_handler:
		153	jmp _except_handler3
		154
		155	.globl __try__
		156	__try__:
		157	push %ebp
		158	mov 8(%esp),%ebp
		159
		160	// void *esp;
		161	lea 12(%esp),%eax
		162	mov %eax,0*4(%ebp)
		163
		164	// void *exception_pointers;
		165	xor %eax,%eax
		166	mov %eax,1*4(%ebp)
		167
		168	// void *prev;
		169	mov %fs:0,%eax
		170	mov %eax,2*4(%ebp)
		171
		172	// void *handler;
		173	mov $ seh_handler,%eax
		174	mov %eax,3*4(%ebp)
		175
		176	// void *scopetable;
		177	mov $ seh_scopetable,%eax
		178	mov %eax,4*4(%ebp)
		179
		180	// int trylevel;
		181	xor %eax,%eax
		182	mov %eax,5*4(%ebp)
		183
		184	// register new SEH
		185	lea 2*4(%ebp),%eax
		186	mov %eax,%fs:0
		187
		188	pop %ebp
		189	ret
		190
		191	/* ---------------------------------------------- */
		192	#else
		193	/* ---------------------------------------------- */
		194
		195	/* SEH on x86-64 not implemented */
		196
		197	/* ---------------------------------------------- */
		198	#endif
		199	/* ---------------------------------------------- */

win32/lib/crt1.c+1−2

 } _startupinfo;
 void __getmainargs(int *pargc, char ***pargv, char ***penv, int globb, _startupinfo*);
 int main(int argc, char **argv, char **env);
 int _start(void)
 {
+    __TRY__
     int argc; char **argv; char **env; int ret;
     _startupinfo start_info = {0};
 }
 // =============================================

win32/lib/wincrt1.c+1−0

@@ -10,6 +10,7 @@ void _controlfp(unsigned a, unsigned b); · 9 unmodified lines
10		10
11	int _winstart(void)	11	int _winstart(void)
12	{	12	{
		13	__TRY__
13	char *szCmd;	14	char *szCmd;
14	STARTUPINFO startinfo;	15	STARTUPINFO startinfo;
15	int fShow;	16	int fShow;

win32: register SEH in startup code (i386 only)

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