mirror of
https://github.com/frida/tinycc
synced 2024-11-28 18:43:07 +03:00
277 lines
7.0 KiB
C
277 lines
7.0 KiB
C
#include <stdio.h>
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#include <assert.h>
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#ifndef _WIN32
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#define __fastcall __attribute((fastcall))
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#endif
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#if 1
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#define SYMBOL(x) _##x
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#else
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#define SYMBOL(x) x
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#endif
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/////////////////////////////////////////////////////////////////////////
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////////// TRAP FRAMEWORK
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/////////////////////////////////////////////////////////////////////////
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// if you cast 'TRAP' to a function pointer and call it,
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// it will save all 8 registers,
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// and jump into C-code (previously set using 'SET_TRAP_HANDLER(x)'),
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// in C-code you can pop DWORDs from stack and modify registers
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//
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void *SYMBOL(trap_handler);
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extern unsigned char SYMBOL(trap)[];
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asm (
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".text;"
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"_trap:;"
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"pushl %esp;"
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"pusha;"
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"addl $0x4, 0xc(%esp);"
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"pushl %esp;"
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"call *_trap_handler;"
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"addl $0x4, %esp;"
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"movl 0xc(%esp), %eax;"
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"movl %eax, 0x20(%esp);"
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"popa;"
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"popl %esp;"
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"ret;"
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);
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struct trapframe {
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unsigned edi, esi, ebp, esp, ebx, edx, ecx, eax;
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};
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#define M_FLOAT(addr) (*(float *)(addr))
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#define M_DWORD(addr) (*(unsigned *)(addr))
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#define M_WORD(addr) (*(unsigned short *)(addr))
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#define M_BYTE(addr) (*(unsigned char *)(addr))
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#define R_EAX ((tf)->eax)
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#define R_ECX ((tf)->ecx)
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#define R_EDX ((tf)->edx)
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#define R_EBX ((tf)->ebx)
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#define R_ESP ((tf)->esp)
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#define R_EBP ((tf)->ebp)
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#define R_ESI ((tf)->esi)
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#define R_EDI ((tf)->edi)
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#define ARG(x) (M_DWORD(R_ESP + (x) * 4))
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#define RETN(x) do { \
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M_DWORD(R_ESP + (x)) = M_DWORD(R_ESP); \
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R_ESP += (x); \
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} while (0)
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#define DUMP() do { \
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unsigned i; \
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printf("EAX: %08X\n", R_EAX); \
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printf("ECX: %08X\n", R_ECX); \
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printf("EDX: %08X\n", R_EDX); \
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printf("EBX: %08X\n", R_EBX); \
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printf("ESP: %08X\n", R_ESP); \
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printf("EBP: %08X\n", R_EBP); \
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printf("ESI: %08X\n", R_ESI); \
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printf("EDI: %08X\n", R_EDI); \
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printf("\n"); \
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printf("[RETADDR]: %08X\n", M_DWORD(R_ESP)); \
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for (i = 1; i <= 8; i++) { \
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printf("[ARG%4d]: %08X\n", i, ARG(i)); \
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} \
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} while (0)
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#define SET_TRAP_HANDLER(x) ((SYMBOL(trap_handler)) = (x))
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#define TRAP ((void *) &SYMBOL(trap))
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/////////////////////////////////////////////////////////////////////////
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////////// SAFECALL FRAMEWORK
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/////////////////////////////////////////////////////////////////////////
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// this framework will convert any calling convention to cdecl
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// usage: first set call target with 'SET_SAFECALL_TARGET(x)'
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// then cast 'SAFECALL' to target function pointer type and invoke it
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// after calling, 'ESPDIFF' is the difference of old and new esp
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void *SYMBOL(sc_call_target);
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unsigned SYMBOL(sc_retn_addr);
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unsigned SYMBOL(sc_old_esp);
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unsigned SYMBOL(sc_new_esp);
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extern unsigned char SYMBOL(safecall)[];
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asm (
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".text;"
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"_safecall:;"
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"popl _sc_retn_addr;"
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"movl %esp, _sc_old_esp;"
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"call *_sc_call_target;"
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"movl %esp, _sc_new_esp;"
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"movl _sc_old_esp, %esp;"
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"jmp *_sc_retn_addr;"
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);
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#define SET_SAFECALL_TARGET(x) ((SYMBOL(sc_call_target)) = (x))
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#define SAFECALL ((void *) &SYMBOL(safecall))
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#define ESPDIFF (SYMBOL(sc_new_esp) - SYMBOL(sc_old_esp))
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/////////////////////////////////////////////////////////////////////////
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////////// TEST FASTCALL INVOKE
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/////////////////////////////////////////////////////////////////////////
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void check_fastcall_invoke_0(struct trapframe *tf)
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{
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//DUMP();
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RETN(0);
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}
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void check_fastcall_invoke_1(struct trapframe *tf)
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{
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//DUMP();
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assert(R_ECX == 0x11111111);
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RETN(0);
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}
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void check_fastcall_invoke_2(struct trapframe *tf)
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{
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//DUMP();
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assert(R_ECX == 0x11111111);
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assert(R_EDX == 0x22222222);
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RETN(0);
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}
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void check_fastcall_invoke_3(struct trapframe *tf)
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{
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//DUMP();
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assert(R_ECX == 0x11111111);
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assert(R_EDX == 0x22222222);
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assert(ARG(1) == 0x33333333);
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RETN(1*4);
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}
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void check_fastcall_invoke_4(struct trapframe *tf)
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{
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//DUMP();
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assert(R_ECX == 0x11111111);
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assert(R_EDX == 0x22222222);
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assert(ARG(1) == 0x33333333);
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assert(ARG(2) == 0x44444444);
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RETN(2*4);
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}
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void check_fastcall_invoke_5(struct trapframe *tf)
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{
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//DUMP();
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assert(R_ECX == 0x11111111);
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assert(R_EDX == 0x22222222);
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assert(ARG(1) == 0x33333333);
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assert(ARG(2) == 0x44444444);
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assert(ARG(3) == 0x55555555);
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RETN(3*4);
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}
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void test_fastcall_invoke()
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{
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SET_TRAP_HANDLER(check_fastcall_invoke_0);
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((void __fastcall (*)(void)) TRAP)();
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SET_TRAP_HANDLER(check_fastcall_invoke_1);
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((void __fastcall (*)(unsigned)) TRAP)(0x11111111);
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SET_TRAP_HANDLER(check_fastcall_invoke_2);
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((void __fastcall (*)(unsigned, unsigned)) TRAP)(0x11111111, 0x22222222);
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SET_TRAP_HANDLER(check_fastcall_invoke_3);
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((void __fastcall (*)(unsigned, unsigned, unsigned)) TRAP)(0x11111111, 0x22222222, 0x33333333);
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SET_TRAP_HANDLER(check_fastcall_invoke_4);
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((void __fastcall (*)(unsigned, unsigned, unsigned, unsigned)) TRAP)(0x11111111, 0x22222222, 0x33333333, 0x44444444);
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SET_TRAP_HANDLER(check_fastcall_invoke_5);
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((void __fastcall (*)(unsigned, unsigned, unsigned, unsigned, unsigned)) TRAP)(0x11111111, 0x22222222, 0x33333333, 0x44444444, 0x55555555);
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}
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/////////////////////////////////////////////////////////////////////////
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////////// TEST FUNCTION CODE GENERATION
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/////////////////////////////////////////////////////////////////////////
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int __fastcall check_fastcall_espdiff_0(void)
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{
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return 0;
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}
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int __fastcall check_fastcall_espdiff_1(int a)
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{
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return a;
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}
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int __fastcall check_fastcall_espdiff_2(int a, int b)
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{
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return a + b;
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}
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int __fastcall check_fastcall_espdiff_3(int a, int b, int c)
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{
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return a + b + c;
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}
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int __fastcall check_fastcall_espdiff_4(int a, int b, int c, int d)
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{
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return a + b + c + d;
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}
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int __fastcall check_fastcall_espdiff_5(int a, int b, int c, int d, int e)
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{
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return a + b + c + d + e;
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}
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void test_fastcall_espdiff()
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{
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int x;
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SET_SAFECALL_TARGET(check_fastcall_espdiff_0);
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x = ((typeof(&check_fastcall_espdiff_0))SAFECALL)();
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assert(x == 0);
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assert(ESPDIFF == 0);
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SET_SAFECALL_TARGET(check_fastcall_espdiff_1);
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x = ((typeof(&check_fastcall_espdiff_1))SAFECALL)(1);
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assert(x == 1);
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assert(ESPDIFF == 0);
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SET_SAFECALL_TARGET(check_fastcall_espdiff_2);
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x = ((typeof(&check_fastcall_espdiff_2))SAFECALL)(1, 2);
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assert(x == 1 + 2);
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assert(ESPDIFF == 0);
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SET_SAFECALL_TARGET(check_fastcall_espdiff_3);
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x = ((typeof(&check_fastcall_espdiff_3))SAFECALL)(1, 2, 3);
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assert(x == 1 + 2 + 3);
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assert(ESPDIFF == 1*4);
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SET_SAFECALL_TARGET(check_fastcall_espdiff_4);
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x = ((typeof(&check_fastcall_espdiff_4))SAFECALL)(1, 2, 3, 4);
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assert(x == 1 + 2 + 3 + 4);
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assert(ESPDIFF == 2*4);
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SET_SAFECALL_TARGET(check_fastcall_espdiff_5);
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x = ((typeof(&check_fastcall_espdiff_5))SAFECALL)(1, 2, 3, 4, 5);
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assert(x == 1 + 2 + 3 + 4 + 5);
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assert(ESPDIFF == 3*4);
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}
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int main()
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{
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#define N 10000
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int i;
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for (i = 1; i <= N; i++) {
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test_fastcall_espdiff();
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}
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for (i = 1; i <= N; i++) {
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test_fastcall_invoke();
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}
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puts("TEST OK");
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return 0;
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}
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