From bb1f277db10e6789f57298909d4c7246145997e3 Mon Sep 17 00:00:00 2001 From: Thomas Farr Date: Thu, 19 Jan 2017 01:30:52 +1300 Subject: [PATCH] loader: Add support for 3DSX special relocation types, fixes citra-emu/citra#2449 As per devkitPro/3dstools@47bea18 --- src/core/loader/3dsx.cpp | 34 +++++++++++++++++++++++++--------- 1 file changed, 25 insertions(+), 9 deletions(-) diff --git a/src/core/loader/3dsx.cpp b/src/core/loader/3dsx.cpp index 1c10740a0..09266e8b0 100644 --- a/src/core/loader/3dsx.cpp +++ b/src/core/loader/3dsx.cpp @@ -177,18 +177,34 @@ static THREEDSX_Error Load3DSXFile(FileUtil::IOFile& file, u32 base_addr, pos += table.skip; s32 num_patches = table.patch; while (0 < num_patches && pos < end_pos) { - u32 in_addr = - static_cast(reinterpret_cast(pos) - program_image.data()); - u32 addr = TranslateAddr(*pos, &loadinfo, offsets); - LOG_TRACE(Loader, "Patching %08X <-- rel(%08X,%d) (%08X)", - base_addr + in_addr, addr, current_segment_reloc_table, *pos); + u32 in_addr = base_addr + static_cast(reinterpret_cast(pos) - + program_image.data()); + u32 orig_data = *pos; + u32 sub_type = orig_data >> (32 - 4); + u32 addr = TranslateAddr(orig_data & ~0xF0000000, &loadinfo, offsets); + LOG_TRACE(Loader, "Patching %08X <-- rel(%08X,%d) (%08X)", in_addr, addr, + current_segment_reloc_table, *pos); switch (current_segment_reloc_table) { - case 0: - *pos = (addr); + case 0: { + if (sub_type != 0) + return ERROR_READ; + *pos = addr; break; - case 1: - *pos = static_cast(addr - in_addr); + } + case 1: { + u32 data = addr - in_addr; + switch (sub_type) { + case 0: // 32-bit signed offset + *pos = data; + break; + case 1: // 31-bit signed offset + *pos = data & ~(1U << 31); + break; + default: + return ERROR_READ; + } break; + } default: break; // this should never happen }