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checkpoint on simplified / stripped down dwarf -> rdi, and dwarf parsing helpers

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This commit is contained in:
Ryan Fleury
2025-11-11 15:10:16 -08:00
parent 17ec73d752
commit b8a8ec31c7
13 changed files with 1097 additions and 54 deletions
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src/elf/elf_parse.c
+17 -14
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@@ -125,13 +125,16 @@ internal U64
elf_base_addr_from_bin(ELF_Bin *bin)
{
U64 base_vaddr = 0;
for EachIndex(phdr_idx, bin->phdrs.count)
if(bin->hdr.e_type != ELF_Type_Dyn)
{
ELF_Phdr64 *phdr = &bin->phdrs.v[phdr_idx];
if(phdr->p_type == ELF_PType_Load &&
(base_vaddr == 0 || phdr->p_vaddr < base_vaddr))
for EachIndex(phdr_idx, bin->phdrs.count)
{
base_vaddr = phdr->p_vaddr;
ELF_Phdr64 *phdr = &bin->phdrs.v[phdr_idx];
if(phdr->p_type == ELF_PType_Load &&
(base_vaddr == 0 || phdr->p_vaddr < base_vaddr))
{
base_vaddr = phdr->p_vaddr;
}
}
}
return base_vaddr;
@@ -169,42 +172,42 @@ internal ELF_NoteList
elf_parse_note(Arena *arena, String8 raw_note, ELF_Class elf_class, ELF_MachineKind e_machine)
{
ELF_NoteList result = {0};
for (U64 cursor = 0; cursor < raw_note.size; ) {
U32 owner_size;
U64 owner_size_size = str8_deserial_read_struct(raw_note, cursor, &owner_size);
if (owner_size_size == 0) { goto exit; }
cursor += owner_size_size;
U32 desc_size;
U64 desc_size_size = str8_deserial_read_struct(raw_note, cursor, &desc_size);
if (desc_size_size == 0) { goto exit; }
cursor += desc_size_size;
ELF_NoteType type;
U64 type_size = str8_deserial_read_struct(raw_note, cursor, &type);
if (type_size == 0) { goto exit; }
cursor += type_size;
if (cursor + owner_size > raw_note.size) { goto exit; }
String8 owner = str8_cstring_capped(raw_note.str + cursor, raw_note.str + cursor + owner_size);
cursor += owner_size;
if (cursor + desc_size > raw_note.size) { goto exit; }
String8 desc = str8_substr(raw_note, r1u64(cursor, cursor + desc_size));
cursor += desc_size;
cursor = AlignPow2(cursor, 4);
ELF_NoteNode *n = push_array(arena, ELF_NoteNode, 1);
n->v.owner = owner;
n->v.desc = desc;
n->v.type = type;
SLLQueuePush(result.first, result.last, n);
result.count += 1;
}
exit:;
exit:;
return result;
}