Add test case for fastcall calling convention

This commit is contained in:
Zhang Boyang 2017-09-10 18:20:02 +08:00
parent f406f63a38
commit 078d8c2c5a
3 changed files with 278 additions and 1 deletions

276
tests/tests2/99_fastcall.c Normal file
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@ -0,0 +1,276 @@
#include <stdio.h>
#include <assert.h>
#ifndef _WIN32
#define __fastcall __attribute((fastcall))
#endif
#if 1
#define SYMBOL(x) _##x
#else
#define SYMBOL(x) x
#endif
/////////////////////////////////////////////////////////////////////////
////////// TRAP FRAMEWORK
/////////////////////////////////////////////////////////////////////////
// if you cast 'TRAP' to a function pointer and call it,
// it will save all 8 registers,
// and jump into C-code (previously set using 'SET_TRAP_HANDLER(x)'),
// in C-code you can pop DWORDs from stack and modify registers
//
void *SYMBOL(trap_handler);
extern unsigned char SYMBOL(trap)[];
asm (
".text;"
"_trap:;"
"pushl %esp;"
"pusha;"
"addl $0x4, 0xc(%esp);"
"pushl %esp;"
"call *_trap_handler;"
"addl $0x4, %esp;"
"movl 0xc(%esp), %eax;"
"movl %eax, 0x20(%esp);"
"popa;"
"popl %esp;"
"ret;"
);
struct trapframe {
unsigned edi, esi, ebp, esp, ebx, edx, ecx, eax;
};
#define M_FLOAT(addr) (*(float *)(addr))
#define M_DWORD(addr) (*(unsigned *)(addr))
#define M_WORD(addr) (*(unsigned short *)(addr))
#define M_BYTE(addr) (*(unsigned char *)(addr))
#define R_EAX ((tf)->eax)
#define R_ECX ((tf)->ecx)
#define R_EDX ((tf)->edx)
#define R_EBX ((tf)->ebx)
#define R_ESP ((tf)->esp)
#define R_EBP ((tf)->ebp)
#define R_ESI ((tf)->esi)
#define R_EDI ((tf)->edi)
#define ARG(x) (M_DWORD(R_ESP + (x) * 4))
#define RETN(x) do { \
M_DWORD(R_ESP + (x)) = M_DWORD(R_ESP); \
R_ESP += (x); \
} while (0)
#define DUMP() do { \
unsigned i; \
printf("EAX: %08X\n", R_EAX); \
printf("ECX: %08X\n", R_ECX); \
printf("EDX: %08X\n", R_EDX); \
printf("EBX: %08X\n", R_EBX); \
printf("ESP: %08X\n", R_ESP); \
printf("EBP: %08X\n", R_EBP); \
printf("ESI: %08X\n", R_ESI); \
printf("EDI: %08X\n", R_EDI); \
printf("\n"); \
printf("[RETADDR]: %08X\n", M_DWORD(R_ESP)); \
for (i = 1; i <= 8; i++) { \
printf("[ARG%4d]: %08X\n", i, ARG(i)); \
} \
} while (0)
#define SET_TRAP_HANDLER(x) ((SYMBOL(trap_handler)) = (x))
#define TRAP ((void *) &SYMBOL(trap))
/////////////////////////////////////////////////////////////////////////
////////// SAFECALL FRAMEWORK
/////////////////////////////////////////////////////////////////////////
// this framwork will convert any calling convention to cdecl
// usage: first set call target with 'SET_SAFECALL_TARGET(x)'
// then cast 'SAFECALL' to target funtion pointer type and invoke it
// after calling, 'ESPDIFF' is the differance of old and new esp
void *SYMBOL(sc_call_target);
unsigned SYMBOL(sc_retn_addr);
unsigned SYMBOL(sc_old_esp);
unsigned SYMBOL(sc_new_esp);
extern unsigned char SYMBOL(safecall)[];
asm (
".text;"
"_safecall:;"
"popl _sc_retn_addr;"
"movl %esp, _sc_old_esp;"
"call *_sc_call_target;"
"movl %esp, _sc_new_esp;"
"movl _sc_old_esp, %esp;"
"jmp *_sc_retn_addr;"
);
#define SET_SAFECALL_TARGET(x) ((SYMBOL(sc_call_target)) = (x))
#define SAFECALL ((void *) &SYMBOL(safecall))
#define ESPDIFF (SYMBOL(sc_new_esp) - SYMBOL(sc_old_esp))
/////////////////////////////////////////////////////////////////////////
////////// TEST FASTCALL INVOKE
/////////////////////////////////////////////////////////////////////////
void check_fastcall_invoke_0(struct trapframe *tf)
{
//DUMP();
RETN(0);
}
void check_fastcall_invoke_1(struct trapframe *tf)
{
//DUMP();
assert(R_ECX == 0x11111111);
RETN(0);
}
void check_fastcall_invoke_2(struct trapframe *tf)
{
//DUMP();
assert(R_ECX == 0x11111111);
assert(R_EDX == 0x22222222);
RETN(0);
}
void check_fastcall_invoke_3(struct trapframe *tf)
{
//DUMP();
assert(R_ECX == 0x11111111);
assert(R_EDX == 0x22222222);
assert(ARG(1) == 0x33333333);
RETN(1*4);
}
void check_fastcall_invoke_4(struct trapframe *tf)
{
//DUMP();
assert(R_ECX == 0x11111111);
assert(R_EDX == 0x22222222);
assert(ARG(1) == 0x33333333);
assert(ARG(2) == 0x44444444);
RETN(2*4);
}
void check_fastcall_invoke_5(struct trapframe *tf)
{
//DUMP();
assert(R_ECX == 0x11111111);
assert(R_EDX == 0x22222222);
assert(ARG(1) == 0x33333333);
assert(ARG(2) == 0x44444444);
assert(ARG(3) == 0x55555555);
RETN(3*4);
}
void test_fastcall_invoke()
{
SET_TRAP_HANDLER(check_fastcall_invoke_0);
((void __fastcall (*)(void)) TRAP)();
SET_TRAP_HANDLER(check_fastcall_invoke_1);
((void __fastcall (*)(unsigned)) TRAP)(0x11111111);
SET_TRAP_HANDLER(check_fastcall_invoke_2);
((void __fastcall (*)(unsigned, unsigned)) TRAP)(0x11111111, 0x22222222);
SET_TRAP_HANDLER(check_fastcall_invoke_3);
((void __fastcall (*)(unsigned, unsigned, unsigned)) TRAP)(0x11111111, 0x22222222, 0x33333333);
SET_TRAP_HANDLER(check_fastcall_invoke_4);
((void __fastcall (*)(unsigned, unsigned, unsigned, unsigned)) TRAP)(0x11111111, 0x22222222, 0x33333333, 0x44444444);
SET_TRAP_HANDLER(check_fastcall_invoke_5);
((void __fastcall (*)(unsigned, unsigned, unsigned, unsigned, unsigned)) TRAP)(0x11111111, 0x22222222, 0x33333333, 0x44444444, 0x55555555);
}
/////////////////////////////////////////////////////////////////////////
////////// TEST FUNCTION CODE GENERATION
/////////////////////////////////////////////////////////////////////////
int __fastcall check_fastcall_espdiff_0(void)
{
return 0;
}
int __fastcall check_fastcall_espdiff_1(int a)
{
return a;
}
int __fastcall check_fastcall_espdiff_2(int a, int b)
{
return a + b;
}
int __fastcall check_fastcall_espdiff_3(int a, int b, int c)
{
return a + b + c;
}
int __fastcall check_fastcall_espdiff_4(int a, int b, int c, int d)
{
return a + b + c + d;
}
int __fastcall check_fastcall_espdiff_5(int a, int b, int c, int d, int e)
{
return a + b + c + d + e;
}
void test_fastcall_espdiff()
{
int x;
SET_SAFECALL_TARGET(check_fastcall_espdiff_0);
x = ((typeof(&check_fastcall_espdiff_0))SAFECALL)();
assert(x == 0);
assert(ESPDIFF == 0);
SET_SAFECALL_TARGET(check_fastcall_espdiff_1);
x = ((typeof(&check_fastcall_espdiff_1))SAFECALL)(1);
assert(x == 1);
assert(ESPDIFF == 0);
SET_SAFECALL_TARGET(check_fastcall_espdiff_2);
x = ((typeof(&check_fastcall_espdiff_2))SAFECALL)(1, 2);
assert(x == 1 + 2);
assert(ESPDIFF == 0);
SET_SAFECALL_TARGET(check_fastcall_espdiff_3);
x = ((typeof(&check_fastcall_espdiff_3))SAFECALL)(1, 2, 3);
assert(x == 1 + 2 + 3);
assert(ESPDIFF == 1*4);
SET_SAFECALL_TARGET(check_fastcall_espdiff_4);
x = ((typeof(&check_fastcall_espdiff_4))SAFECALL)(1, 2, 3, 4);
assert(x == 1 + 2 + 3 + 4);
assert(ESPDIFF == 2*4);
SET_SAFECALL_TARGET(check_fastcall_espdiff_5);
x = ((typeof(&check_fastcall_espdiff_5))SAFECALL)(1, 2, 3, 4, 5);
assert(x == 1 + 2 + 3 + 4 + 5);
assert(ESPDIFF == 3*4);
}
int main()
{
#define N 10000
int i;
for (i = 1; i <= N; i++) {
test_fastcall_espdiff();
}
for (i = 1; i <= N; i++) {
test_fastcall_invoke();
}
puts("TEST OK");
return 0;
}

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TEST OK

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@ -18,7 +18,7 @@ ifeq ($(ARCH),x86_64)
SKIP += 73_arm64.test
endif
ifeq (,$(filter i386,$(ARCH)))
SKIP += 98_al_ax_extend.test
SKIP += 98_al_ax_extend.test 99_fastcall.test
endif
ifeq (,$(filter i386 x86_64,$(ARCH)))
SKIP += 85_asm-outside-function.test