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sceRefs reading algorithm modified

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This commit is contained in:
Nekotekina 2014-11-05 21:53:54 +03:00
parent 5d63c6b526
commit 1749b95b57
1 changed files with 30 additions and 23 deletions
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51
rpcs3/Loader/ELF32.cpp
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@ -578,34 +578,41 @@ bool ELF32Loader::LoadShdrData(u64 offset)
} }
else if (machine == MACHINE_ARM && !strcmp(shdr_name_arr[i].c_str(), ".sceRefs.rodata")) else if (machine == MACHINE_ARM && !strcmp(shdr_name_arr[i].c_str(), ".sceRefs.rodata"))
{ {
// basically unknown struct auto code = vm::psv::ptr<const u32>::make(shdr.sh_addr);
u32 data = 0;
struct reloc_info for (; code.addr() < shdr.sh_addr + shdr.sh_size; code++)
{ {
u32 code; // 0xff switch (*code)
u32 data; // address that will be written
u32 code1; // 0x2f
u32 addr1; // address of movw r12,# instruction to be replaced
u32 code2; // 0x30
u32 addr2; // address of movt r12,# instruction to be replaced
u32 code3; // 0
};
auto rel = vm::psv::ptr<const reloc_info>::make(shdr.sh_addr);
for (u32 j = 0; j < shdr.sh_size / sizeof(reloc_info); j++)
{ {
if (rel[j].code == 0xff && rel[j].code1 == 0x2f && rel[j].code2 == 0x30 && rel[j].code3 == 0) case 0x000000ff:
{ {
const u32 data = rel[j].data; // save address for future use
vm::psv::write16(rel[j].addr1 + 0, 0xf240 | (data & 0x800) >> 1 | (data & 0xf000) >> 12); // MOVW data = *++code;
vm::psv::write16(rel[j].addr1 + 2, 0x0c00 | (data & 0x700) << 4 | (data & 0xff)); break;
vm::psv::write16(rel[j].addr2 + 0, 0xf2c0 | (data & 0x8000000) >> 17 | (data & 0xf0000000) >> 28); // MOVT
vm::psv::write16(rel[j].addr2 + 2, 0x0c00 | (data & 0x7000000) >> 12 | (data & 0xff0000) >> 16);
} }
else case 0x0000002f:
{ {
LOG_NOTICE(LOADER, "sceRefs: unknown code found (code=0x%x, code1=0x%x, code2=0x%x, code3=0x%x)", rel[j].code, rel[j].code1, rel[j].code2, rel[j].code3); // movw r12,# instruction will be replaced
const u32 addr = *++code;
vm::psv::write16(addr + 0, 0xf240 | (data & 0x800) >> 1 | (data & 0xf000) >> 12); // MOVW
vm::psv::write16(addr + 2, 0x0c00 | (data & 0x700) << 4 | (data & 0xff));
break;
}
case 0x00000030:
{
// movt r12,# instruction will be replaced
const u32 addr = *++code;
vm::psv::write16(addr + 0, 0xf2c0 | (data & 0x8000000) >> 17 | (data & 0xf0000000) >> 28); // MOVT
vm::psv::write16(addr + 2, 0x0c00 | (data & 0x7000000) >> 12 | (data & 0xff0000) >> 16);
break;
}
case 0x00000000:
{
// probably, no operation
break;
}
default: LOG_NOTICE(LOADER, "sceRefs: unknown code found (0x%08x)", *code);
} }
} }
} }