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factored out format specific relocation code to COFF layer

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This commit is contained in:
Nikita Smith
2025-04-28 13:54:51 -07:00
committed by Ryan Fleury
parent ada037cb88
commit c2a0a6f1e1
1 changed files with 88 additions and 0 deletions
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src/coff/coff.c
+88
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@@ -179,6 +179,94 @@ coff_apply_size_from_reloc(COFF_MachineType machine, COFF_RelocType x)
return 0;
}
internal void
coff_apply_reloc_x64(String8 data,
COFF_Reloc_X64 type,
U64 apply_off,
U64 reloc_virtual_offset,
U32 symbol_section_number,
U32 symbol_section_offset,
U32 symbol_virtual_offset,
U64 symbol_address)
{
U64 reloc_value_size = 0;
S64 reloc_value = 0;
switch (type) {
case COFF_Reloc_X64_Abs: {} break;
case COFF_Reloc_X64_Addr64: {
reloc_value_size = 8;
reloc_value = symbol_address;
} break;
case COFF_Reloc_X64_Addr32: {
reloc_value_size = 4;
reloc_value = safe_cast_u32(symbol_address);
} break;
case COFF_Reloc_X64_Addr32Nb: {
reloc_value_size = 4;
reloc_value = safe_cast_u32(symbol_virtual_offset);
} break;
case COFF_Reloc_X64_Rel32: {
reloc_value_size = 4;
reloc_value = safe_cast_s32(symbol_virtual_offset - reloc_virtual_offset - (4 + 0));
} break;
case COFF_Reloc_X64_Rel32_1: {
reloc_value_size = 4;
reloc_value = safe_cast_s32(symbol_virtual_offset - reloc_virtual_offset - (4 + 1));
} break;
case COFF_Reloc_X64_Rel32_2: {
reloc_value_size = 4;
reloc_value = safe_cast_s32(symbol_virtual_offset - reloc_virtual_offset - (4 + 2));
} break;
case COFF_Reloc_X64_Rel32_3: {
reloc_value_size = 4;
reloc_value = safe_cast_s32(symbol_virtual_offset - reloc_virtual_offset - (4 + 3));
} break;
case COFF_Reloc_X64_Rel32_4: {
reloc_value_size = 4;
reloc_value = safe_cast_s32(symbol_virtual_offset - reloc_virtual_offset - (4 + 4));
} break;
case COFF_Reloc_X64_Rel32_5: {
reloc_value_size = 4;
reloc_value = safe_cast_s32(symbol_virtual_offset - reloc_virtual_offset - (4 + 5));
} break;
case COFF_Reloc_X64_Section: {
reloc_value_size = 4;
reloc_value = symbol_section_number;
} break;
case COFF_Reloc_X64_SecRel: {
reloc_value_size = 4;
reloc_value = symbol_section_offset;
} break;
case COFF_Reloc_X64_SecRel7: {
NotImplemented;
} break;
case COFF_Reloc_X64_Token: {
NotImplemented;
} break;
case COFF_Reloc_X64_SRel32: {
NotImplemented;
} break;
case COFF_Reloc_X64_Pair: {
NotImplemented;
} break;
case COFF_Reloc_X64_SSpan32: {
NotImplemented;
} break;
}
// read addend
Assert(apply_off + reloc_value_size <= data.size);
U64 raw_addend = 0;
str8_deserial_read(data, apply_off, &raw_addend, reloc_value_size, reloc_value_size);
// compute new reloc value
S64 addend = extend_sign64(raw_addend, reloc_value_size);
U64 reloc_result = reloc_value + addend;
// commit new reloc value
MemoryCopy(data.str + apply_off, &reloc_result, reloc_value_size);
}
internal String8
coff_make_import_lookup(Arena *arena, U16 hint, String8 name)
{