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basic interpreter gets parameters

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This commit is contained in:
Niko 2024-09-05 03:05:18 -04:00
parent a631bc5e5c
commit 10817ed9f7
1 changed files with 77 additions and 12 deletions
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89
src/core/linker.cpp
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@ -73,12 +73,35 @@ static void RunMainEntry(VAddr addr, EntryParams* params, ExitFunc exit_func, au
addr = m->GetBaseAddress(); addr = m->GetBaseAddress();
memcpy(&elf, &addr, 8); memcpy(&elf, &addr, 8);
// 8 registers in x86
u64 r[8];
memset(r, 0, sizeof(r));
while(1) while(1)
{ {
switch(pc[0]) switch(pc[0])
{ {
case 0x50: // PUSH RAX
case 0x51: // PUSH RCX
case 0x52:
case 0x53:
case 0x54:
case 0x55: case 0x55:
printf("PUSH\n"); case 0x56:
case 0x57:
printf("PUSH reg%d\n", pc[0]&7);
pc += 1;
break;
case 0x58:
case 0x59:
case 0x5A:
case 0x5B:
case 0x5C:
case 0x5D:
case 0x5E:
case 0x5F:
//printf("POP reg%d\n", pc[0]&7);
pc += 1; pc += 1;
break; break;
@ -86,24 +109,47 @@ static void RunMainEntry(VAddr addr, EntryParams* params, ExitFunc exit_func, au
switch(pc[1]) switch(pc[1])
{ {
case 0x89: case 0x89:
printf("MOV REG\n"); //printf("MOV REG\n");
r[pc[2] & 7] = r[(pc[2]>>3) & 7];
pc += 3; pc += 3;
break; break;
case 0x8d: case 0x8d:
printf("LEA\n"); printf("LEA\n");
offset =
(pc[3]) + (pc[4]<<8) + (pc[5]<<16) + (pc[6]<<24);
r[(pc[2]>>3) & 7] = (u64)(pc+7+offset);
printf("%d %08x\n", (pc[2]>>3) & 7, offset);
pc += 7; pc += 7;
break; break;
} }
break; break;
case 0x31: case 0x31:
printf("XOR\n"); //printf("XOR\n");
r[pc[1] & 7] ^= r[pc[1]>>3 & 7];
pc += 2; pc += 2;
break; break;
case 0xb8:
case 0xb9:
case 0xba: case 0xba:
printf("MOV IMM\n"); case 0xbb:
case 0xbc:
case 0xbd:
case 0xbe:
case 0xbf:
//printf("MOV IMM\n");
offset =
(pc[1]) + (pc[2]<<8) + (pc[3]<<16) + (pc[4]<<24);
*(int*)&r[pc[0] & 7] = offset;
pc += 5; pc += 5;
break; break;
@ -125,20 +171,27 @@ static void RunMainEntry(VAddr addr, EntryParams* params, ExitFunc exit_func, au
offset = offset =
(pc[2]) + (pc[3]<<8) + (pc[4]<<16) + (pc[5]<<24); (pc[2]) + (pc[3]<<8) + (pc[4]<<16) + (pc[5]<<24);
printf("offset: %08x\n", offset); //printf("offset: %08x\n", offset);
pc += (int)offset + 6; pc += (int)offset + 6;
printf("PC Val: %08x\n", pc); //printf("PC Val: %08x\n", pc);
printf("PC deref: %08x\n", *(int*)pc); //printf("PC deref: %08x\n", *(int*)pc);
printf("ELF-Offset: %08x\n", pc-elf);
//printf("ELF-Offset: %08x\n", pc-elf);
// TODO // TODO
// Find where HLE resolver has overwritten pointers // Can this be done with m->ForEachRelocatable?
// Find if this is relocated or not
bool reloc=false;
for (u32 i = 0; i < m->dynamic_info.jmp_relocation_table_size / sizeof(elf_relocation); i++) {
if(m->dynamic_info.jmp_relocation_table[i].rel_offset == (pc-elf))
reloc = true;
}
// NORMALLY // NORMALLY
// Jump to elf-relative PC-deref // Jump to elf-relative PC-deref
if(0) if(!reloc)
{ {
pc = elf + *(int*)pc; pc = elf + *(int*)pc;
} }
@ -147,7 +200,19 @@ static void RunMainEntry(VAddr addr, EntryParams* params, ExitFunc exit_func, au
// Jump to *(int*)pc, and execute ARM // Jump to *(int*)pc, and execute ARM
else else
{ {
printf("CALL HLE\n"); printf("CALL HLE: %08x\n", *(int*)pc);
// C parameters (may not match ARM order)
// param1: r[7] = 0
// param2: r[6] = buffer
// param3: r[2] = 0x18
//printf("%d %s %d\n", r[7], r[6], r[2]);
//int (*f)(int a, u64 b, int c);
//memcpy(&f, &pc, 8);
//f(r[7], r[6], r[2]);
Libraries::Kernel::sceKernelWrite(r[7], (char*)r[6], r[2]);
} }
// next, resolve *(int*)jumpPtr (0x176) // next, resolve *(int*)jumpPtr (0x176)