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Fixed Crit hits sigs for Windows and cleaned up the code somewhat

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--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%402154
This commit is contained in:
Matt Woodrow
2008-05-18 00:51:51 +00:00
parent b90386276f
commit f7613f80f1
2 changed files with 22 additions and 31 deletions
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extensions/tf2/criticals.cpp
+18 -27
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@@ -165,13 +165,11 @@ bool CriticalHitManager::CreateCriticalMeleeDetour()
//If TempDetour returns non-zero we want to load something into eax and return this value
//IA32_Test_Rm_Reg(jit, eax, eax, something);
jit->write_ubyte(0x85);
jit->write_ubyte(0xC0);
//test eax, eax
IA32_Test_Rm_Reg(jit, REG_EAX, REG_EAX, MOD_REG);
//JNZ critical_callback+50
jit->write_ubyte(0x75);
jit->write_ubyte(50-((jit->outptr+1)-jit->outbase));
//jnz _skip
jitoffs_t jmp = IA32_Jump_Cond_Imm8(jit, CC_NZ, 0);
int callbyte = -1;
/* The callbyte should return the nth byte (starting from 1) in the backup bytes - Should be an 0xE8 (call) */
@@ -212,18 +210,15 @@ bool CriticalHitManager::CreateCriticalMeleeDetour()
i += 4;
}
/* Return to the original function */
call = IA32_Jump_Imm32(jit, 0);
IA32_Write_Jump32_Abs(jit, call, (unsigned char *)melee_address + melee_restore.bytes);
wr.outbase = (jitcode_t)melee_callback+50;
wr.outptr = wr.outbase;
//copy g_returnvalue into eax
jit->write_ubyte(0xA1);
jit->write_uint32((jit_uint32_t)&g_returnvalue);
//_skip:
//mov eax, [g_returnvalue]
//ret
IA32_Send_Jump8_Here(jit, jmp);
IA32_Mov_Eax_Mem(jit, (jit_int32_t)&g_returnvalue);
IA32_Return(jit);
return true;
@@ -280,13 +275,11 @@ bool CriticalHitManager::CreateCriticalKnifeDetour()
//If TempDetour returns non-zero we want to load something into eax and return this value
//IA32_Test_Rm_Reg(jit, eax, eax, something);
jit->write_ubyte(0x85);
jit->write_ubyte(0xC0);
//test eax, eax
IA32_Test_Rm_Reg(jit, REG_EAX, REG_EAX, MOD_REG);
//JNZ critical_callback+50
jit->write_ubyte(0x75);
jit->write_ubyte(50-((jit->outptr+1)-jit->outbase));
//jnz _skip
jitoffs_t jmp = IA32_Jump_Cond_Imm8(jit, CC_NZ, 0);
/* Patch old bytes in */
for (size_t i=0; i<knife_restore.bytes; i++)
@@ -298,13 +291,11 @@ bool CriticalHitManager::CreateCriticalKnifeDetour()
call = IA32_Jump_Imm32(jit, 0);
IA32_Write_Jump32_Abs(jit, call, (unsigned char *)knife_address + knife_restore.bytes);
wr.outbase = (jitcode_t)knife_callback+50;
wr.outptr = wr.outbase;
//copy g_returnvalue into eax
jit->write_ubyte(0xA1);
jit->write_uint32((jit_uint32_t)&g_returnvalue);
//_skip:
//mov eax, [g_returnvalue]
//ret
IA32_Send_Jump8_Here(jit, jmp);
IA32_Mov_Eax_Mem(jit, (jit_int32_t)&g_returnvalue);
IA32_Return(jit);
return true;