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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdarg.h>
#include "debug.h"
#include "x64emu.h"
#include "x64run.h"
#include "emu/x64emu_private.h"
#include "emu/x64run_private.h"
#include "box64context.h"
#include "box64stack.h"
#include "dynarec.h"
EXPORTDYN
uint64_t RunFunction(box64context_t *context, uintptr_t fnc, int nargs, ...)
{
(void)context;
x64emu_t *emu = thread_get_emu();
int align = (nargs>6)?(((nargs-6)&1)):0;
int stackn = align + ((nargs>6)?(nargs-6):0);
Push64(emu, R_RBP); // push rbp
R_RBP = R_RSP; // mov rbp, rsp
R_RSP -= stackn*sizeof(void*); // need to push in reverse order
uint64_t *p = (uint64_t*)R_RSP;
va_list va;
va_start (va, nargs);
for (int i=0; i<nargs; ++i) {
if(i<6) {
int nn[] = {_DI, _SI, _DX, _CX, _R8, _R9};
emu->regs[nn[i]].q[0] = va_arg(va, uint64_t);
} else {
*p = va_arg(va, uint64_t);
p++;
}
}
va_end (va);
uintptr_t oldip = R_RIP;
DynaCall(emu, fnc);
if(oldip==R_RIP) {
R_RSP = R_RBP; // mov rsp, rbp
R_RBP = Pop64(emu); // pop rbp
}
uint64_t ret = R_RAX;
return ret;
}
EXPORTDYN
uint64_t RunSafeFunction(box64context_t *context, uintptr_t fnc, int nargs, ...)
{
(void)context;
x64emu_t *emu = thread_get_emu();
int align = (nargs>6)?(((nargs-6)&1)):0;
int stackn = align + ((nargs>6)?(nargs-6):0);
Push64(emu, R_RBP); // push rbp
uintptr_t old_rbp = R_RBP = R_RSP; // mov rbp, rsp
Push64(emu, R_RDI);
Push64(emu, R_RSI);
Push64(emu, R_RDX);
Push64(emu, R_RCX);
Push64(emu, R_R8);
Push64(emu, R_R9);
Push64(emu, R_R10);
Push64(emu, R_R11);
Push64(emu, R_RAX);
R_RSP -= stackn*sizeof(void*); // need to push in reverse order
uint64_t *p = (uint64_t*)R_RSP;
va_list va;
va_start (va, nargs);
for (int i=0; i<nargs; ++i) {
if(i<6) {
int nn[] = {_DI, _SI, _DX, _CX, _R8, _R9};
emu->regs[nn[i]].q[0] = va_arg(va, uint64_t);
} else {
*p = va_arg(va, uint64_t);
p++;
}
}
va_end (va);
uintptr_t oldip = R_RIP;
DynaCall(emu, fnc);
uint64_t ret = R_RAX;
R_RIP = oldip;
R_RAX = Pop64(emu);
R_R11 = Pop64(emu);
R_R10 = Pop64(emu);
R_R9 = Pop64(emu);
R_R8 = Pop64(emu);
R_RCX = Pop64(emu);
R_RDX = Pop64(emu);
R_RSI = Pop64(emu);
R_RDI = Pop64(emu);
R_RSP = old_rbp; // mov rsp, rbp
R_RBP = Pop64(emu); // pop rbp
return ret;
}
EXPORTDYN
uint64_t RunFunctionWithEmu(x64emu_t *emu, int QuitOnLongJump, uintptr_t fnc, int nargs, ...)
{
int align = (nargs>6)?(((nargs-6)&1)):0;
int stackn = align + ((nargs>6)?(nargs-6):0);
Push64(emu, R_RBP); // push rbp
R_RBP = R_RSP; // mov rbp, rsp
R_RSP -= stackn*sizeof(void*); // need to push in reverse order
uint64_t *p = (uint64_t*)R_RSP;
va_list va;
va_start (va, nargs);
for (int i=0; i<nargs; ++i) {
if(i<6) {
int nn[] = {_DI, _SI, _DX, _CX, _R8, _R9};
emu->regs[nn[i]].q[0] = va_arg(va, uint64_t);
} else {
*p = va_arg(va, uint64_t);
p++;
}
}
va_end (va);
uintptr_t oldip = R_RIP;
int old_quit = emu->quit;
int oldlong = emu->quitonlongjmp;
emu->quit = 0;
emu->quitonlongjmp = QuitOnLongJump;
DynaCall(emu, fnc);
if(oldip==R_RIP) {
R_RSP = R_RBP; // restore stack only if EIP is the one expected (else, it means return value is not the one expected)
R_RBP = Pop64(emu); //Pop EBP
}
emu->quit = old_quit;
emu->quitonlongjmp = oldlong;
return R_RAX;
}
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