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Decipher some .debug sections

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David Gonzalez Martin 2024-09-19 07:13:02 -06:00 committed by David
parent 271c2614cc
commit 7900290013
1 changed files with 42 additions and 15 deletions
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57
bootstrap/main.c
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@ -9662,16 +9662,22 @@ may_be_unused fn void write_elf(Thread* thread, const ObjectOptions* const restr
auto name = elf_get_section_name(builder, strlit(".debug_str"));
u8 data[] = {
0x63, 0x6C, 0x61, 0x6E, 0x67, 0x20, 0x76, 0x65, 0x72, 0x73, 0x69, 0x6F, 0x6E, 0x20, 0x31, 0x38,
0x2E, 0x31, 0x2E, 0x38, 0x00, 0x6D, 0x61, 0x69, 0x6E, 0x2E, 0x63, 0x00, 0x2F, 0x68, 0x6F, 0x6D,
0x65, 0x2F, 0x64, 0x61, 0x76, 0x69, 0x64, 0x2F, 0x6D, 0x69, 0x6E, 0x69, 0x6D, 0x61, 0x6C, 0x00,
0x6D, 0x61, 0x69, 0x6E, 0x00, 0x69, 0x6E, 0x74, 0x00,
String strings[] = {
strlit("clang version 18.1.8"),
strlit("main.c"),
strlit("/home/david/minimal"),
strlit("main"),
strlit("int"),
};
auto size = sizeof(data);
for (u32 i = 0; i < array_length(strings); i += 1)
{
String string = strings[i];
auto string_length = string.length + 1;
memcpy(vb_add(&builder->file, string_length), string.pointer, string_length);
}
memcpy(vb_add(&builder->file, size), data, size);
auto size = builder->file.length - offset;
*section_header = (ELFSectionHeader) {
.name_offset = name,
@ -9700,11 +9706,17 @@ may_be_unused fn void write_elf(Thread* thread, const ObjectOptions* const restr
auto name = elf_get_section_name(builder, strlit(".debug_addr"));
u8 data[] = { 0x0C, 0x00, 0x00, 0x00, 0x05, 0x00, 0x08, 0x00, 0x1C, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, };
*vb_add_struct(&builder->file, DwarfAddressTableHeader) = (DwarfAddressTableHeader) {
.unit_length = 0xc,
.version = 5,
.address_size = 8,
.segment_selector_size = 0,
};
auto size = sizeof(data);
u64 addresses[] = { 0x111c };
memcpy(vb_add(&builder->file, sizeof(addresses)), addresses, sizeof(addresses));
memcpy(vb_add(&builder->file, size), data, size);
auto size = builder->file.length - offset;
*section_header = (ELFSectionHeader) {
.name_offset = name,
@ -9766,14 +9778,29 @@ may_be_unused fn void write_elf(Thread* thread, const ObjectOptions* const restr
auto name = elf_get_section_name(builder, strlit(".debug_str_offsets"));
u8 data[] = {
0x18, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,
0x1C, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x35, 0x00, 0x00, 0x00,
STRUCT(DwarfDebugStrOffsetsHeader)
{
u32 length;
u16 version;
u8 padding[2];
};
auto size = sizeof(data);
*vb_add_struct(&builder->file, DwarfDebugStrOffsetsHeader) = (DwarfDebugStrOffsetsHeader) {
.length = 0x18,
.version = 5,
};
memcpy(vb_add(&builder->file, size), data, size);
u32 offsets[] = {
0,
0x15,
0x1c,
0x30,
0x35,
};
memcpy(vb_add(&builder->file, sizeof(offsets)), offsets, sizeof(offsets));
auto size = builder->file.length - offset;
*section_header = (ELFSectionHeader) {
.name_offset = name,