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Loader: Clean up the 3DSX AppLoader.

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This commit is contained in:
Emmanuel Gil Peyrot 2015-01-07 01:21:50 +00:00
parent 08aaa33500
commit 84e52a944d
1 changed files with 24 additions and 17 deletions
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41
src/core/loader/3dsx.cpp
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@ -85,7 +85,7 @@ struct THREEloadinfo
u32 seg_sizes[3]; u32 seg_sizes[3];
}; };
static u32 TranslateAddr(u32 addr, THREEloadinfo *loadinfo, u32* offsets) static u32 TranslateAddr(u32 addr, const THREEloadinfo *loadinfo, u32* offsets)
{ {
if (addr < offsets[0]) if (addr < offsets[0])
return loadinfo->seg_addrs[0] + addr; return loadinfo->seg_addrs[0] + addr;
@ -130,8 +130,9 @@ static THREEDSX_Error Load3DSXFile(FileUtil::IOFile& file, u32 base_addr)
// Read the relocation headers // Read the relocation headers
u32* relocs = (u32*)(loadinfo.seg_ptrs[2] + hdr.data_seg_size); u32* relocs = (u32*)(loadinfo.seg_ptrs[2] + hdr.data_seg_size);
for (u32 current_segment = 0; current_segment < 3; current_segment++) { for (unsigned current_segment = 0; current_segment < 3; current_segment++) {
if (file.ReadBytes(&relocs[current_segment*n_reloc_tables], n_reloc_tables * 4) != n_reloc_tables * 4) size_t size = n_reloc_tables * 4;
if (file.ReadBytes(&relocs[current_segment * n_reloc_tables], size) != size)
return ERROR_READ; return ERROR_READ;
} }
@ -147,9 +148,9 @@ static THREEDSX_Error Load3DSXFile(FileUtil::IOFile& file, u32 base_addr)
memset((char*)loadinfo.seg_ptrs[2] + hdr.data_seg_size - hdr.bss_size, 0, hdr.bss_size); memset((char*)loadinfo.seg_ptrs[2] + hdr.data_seg_size - hdr.bss_size, 0, hdr.bss_size);
// Relocate the segments // Relocate the segments
for (u32 current_segment = 0; current_segment < 3; current_segment++) { for (unsigned current_segment = 0; current_segment < 3; current_segment++) {
for (u32 current_segment_reloc_table = 0; current_segment_reloc_table < n_reloc_tables; current_segment_reloc_table++) { for (unsigned current_segment_reloc_table = 0; current_segment_reloc_table < n_reloc_tables; current_segment_reloc_table++) {
u32 n_relocs = relocs[current_segment*n_reloc_tables + current_segment_reloc_table]; u32 n_relocs = relocs[current_segment * n_reloc_tables + current_segment_reloc_table];
if (current_segment_reloc_table >= 2) { if (current_segment_reloc_table >= 2) {
// We are not using this table - ignore it because we don't know what it dose // We are not using this table - ignore it because we don't know what it dose
file.Seek(n_relocs*sizeof(THREEDSX_Reloc), SEEK_CUR); file.Seek(n_relocs*sizeof(THREEDSX_Reloc), SEEK_CUR);
@ -158,29 +159,35 @@ static THREEDSX_Error Load3DSXFile(FileUtil::IOFile& file, u32 base_addr)
static THREEDSX_Reloc reloc_table[RELOCBUFSIZE]; static THREEDSX_Reloc reloc_table[RELOCBUFSIZE];
u32* pos = (u32*)loadinfo.seg_ptrs[current_segment]; u32* pos = (u32*)loadinfo.seg_ptrs[current_segment];
u32* end_pos = pos + (loadinfo.seg_sizes[current_segment] / 4); const u32* end_pos = pos + (loadinfo.seg_sizes[current_segment] / 4);
while (n_relocs) { while (n_relocs) {
u32 remaining = std::min(RELOCBUFSIZE, n_relocs); u32 remaining = std::min(RELOCBUFSIZE, n_relocs);
n_relocs -= remaining; n_relocs -= remaining;
if (file.ReadBytes(reloc_table, remaining*sizeof(THREEDSX_Reloc)) != remaining*sizeof(THREEDSX_Reloc)) if (file.ReadBytes(reloc_table, remaining * sizeof(THREEDSX_Reloc)) != remaining * sizeof(THREEDSX_Reloc))
return ERROR_READ; return ERROR_READ;
for (u32 current_inprogress = 0; current_inprogress < remaining && pos < end_pos; current_inprogress++) { for (unsigned current_inprogress = 0; current_inprogress < remaining && pos < end_pos; current_inprogress++) {
LOG_TRACE(Loader, "(t=%d,skip=%u,patch=%u)\n", const auto& table = reloc_table[current_inprogress];
current_segment_reloc_table, (u32)reloc_table[current_inprogress].skip, (u32)reloc_table[current_inprogress].patch); LOG_TRACE(Loader, "(t=%d,skip=%u,patch=%u)\n", current_segment_reloc_table,
pos += reloc_table[current_inprogress].skip; (u32)table.skip, (u32)table.patch);
s32 num_patches = reloc_table[current_inprogress].patch; pos += table.skip;
s32 num_patches = table.patch;
while (0 < num_patches && pos < end_pos) { while (0 < num_patches && pos < end_pos) {
u32 in_addr = (char*)pos - (char*)&all_mem[0]; u32 in_addr = (char*)pos - (char*)&all_mem[0];
u32 addr = TranslateAddr(*pos, &loadinfo, offsets); u32 addr = TranslateAddr(*pos, &loadinfo, offsets);
LOG_TRACE(Loader, "Patching %08X <-- rel(%08X,%d) (%08X)\n", LOG_TRACE(Loader, "Patching %08X <-- rel(%08X,%d) (%08X)\n",
base_addr + in_addr, addr, current_segment_reloc_table, *pos); base_addr + in_addr, addr, current_segment_reloc_table, *pos);
switch (current_segment_reloc_table) { switch (current_segment_reloc_table) {
case 0: *pos = (addr); break; case 0:
case 1: *pos = (addr - in_addr); break; *pos = (addr);
default: break; //this should never happen break;
case 1:
*pos = (addr - in_addr);
break;
default:
break; //this should never happen
} }
pos++; pos++;
num_patches--; num_patches--;