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Code Issues Releases Activity

Implement simple LoadSymbols for ELF files

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This commit is contained in:
Mathieu Vaillancourt 2014-04-12 18:58:43 -04:00
parent d046cfbba1
commit 67095f8083
1 changed files with 12 additions and 62 deletions
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68
src/core/elf/elf_reader.cpp
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@ -6,13 +6,10 @@
#include "common/common.h" #include "common/common.h"
#include "common/symbols.h"
#include "core/mem_map.h" #include "core/mem_map.h"
#include "core/elf/elf_reader.h" #include "core/elf/elf_reader.h"
//#include "Core/Debugger/Debugger_SymbolMap.h"
//#include "Core/HW/Memmap.h"
//#include "Core/PowerPC/PPCSymbolDB.h"
//void bswap(Elf32_Word &w) {w = Common::swap32(w);} //void bswap(Elf32_Word &w) {w = Common::swap32(w);}
//void bswap(Elf32_Half &w) {w = Common::swap16(w);} //void bswap(Elf32_Half &w) {w = Common::swap16(w);}
@ -71,16 +68,9 @@ ElfReader::ElfReader(void *ptr)
segments = (Elf32_Phdr *)(base + header->e_phoff); segments = (Elf32_Phdr *)(base + header->e_phoff);
sections = (Elf32_Shdr *)(base + header->e_shoff); sections = (Elf32_Shdr *)(base + header->e_shoff);
//for (int i = 0; i < GetNumSegments(); i++)
//{
// byteswapSegment(segments[i]);
//}
//for (int i = 0; i < GetNumSections(); i++)
//{
// byteswapSection(sections[i]);
//}
entryPoint = header->e_entry; entryPoint = header->e_entry;
LoadSymbols();
} }
const char *ElfReader::GetSectionName(int section) const const char *ElfReader::GetSectionName(int section) const
@ -101,9 +91,6 @@ bool ElfReader::LoadInto(u32 vaddr)
{ {
DEBUG_LOG(MASTER_LOG,"String section: %i", header->e_shstrndx); DEBUG_LOG(MASTER_LOG,"String section: %i", header->e_shstrndx);
// sectionOffsets = new u32[GetNumSections()];
// sectionAddrs = new u32[GetNumSections()];
// Should we relocate? // Should we relocate?
bRelocate = (header->e_type != ET_EXEC); bRelocate = (header->e_type != ET_EXEC);
@ -153,29 +140,7 @@ bool ElfReader::LoadInto(u32 vaddr)
} }
} }
/*
LOG(MASTER_LOG,"%i sections:", header->e_shnum);
for (int i=0; i<GetNumSections(); i++)
{
Elf32_Shdr *s = &sections[i];
const char *name = GetSectionName(i);
u32 writeAddr = s->sh_addr + baseAddress;
sectionOffsets[i] = writeAddr - vaddr;
sectionAddrs[i] = writeAddr;
if (s->sh_flags & SHF_ALLOC)
{
LOG(MASTER_LOG,"Data Section found: %s Sitting at %08x, size %08x", name, writeAddr, s->sh_size);
}
else
{
LOG(MASTER_LOG,"NonData Section found: %s Ignoring (size=%08x) (flags=%08x)", name, s->sh_size, s->sh_flags);
}
}
*/
INFO_LOG(MASTER_LOG,"Done loading."); INFO_LOG(MASTER_LOG,"Done loading.");
return true; return true;
} }
@ -192,8 +157,6 @@ SectionID ElfReader::GetSectionByName(const char *name, int firstSection) const
return -1; return -1;
} }
/* TODO(bunnei): The following is verbatim from Dolphin - needs to be updated for this project:
bool ElfReader::LoadSymbols() bool ElfReader::LoadSymbols()
{ {
bool hasSymbols = false; bool hasSymbols = false;
@ -208,33 +171,20 @@ bool ElfReader::LoadSymbols()
int numSymbols = sections[sec].sh_size / sizeof(Elf32_Sym); int numSymbols = sections[sec].sh_size / sizeof(Elf32_Sym);
for (int sym = 0; sym < numSymbols; sym++) for (int sym = 0; sym < numSymbols; sym++)
{ {
int size = Common::swap32(symtab[sym].st_size); int size = symtab[sym].st_size;
if (size == 0) if (size == 0)
continue; continue;
// int bind = symtab[sym].st_info >> 4; // int bind = symtab[sym].st_info >> 4;
int type = symtab[sym].st_info & 0xF; int type = symtab[sym].st_info & 0xF;
int sectionIndex = Common::swap16(symtab[sym].st_shndx);
int value = Common::swap32(symtab[sym].st_value);
const char *name = stringBase + Common::swap32(symtab[sym].st_name);
if (bRelocate)
value += sectionAddrs[sectionIndex];
int symtype = Symbol::SYMBOL_DATA; const char *name = stringBase + symtab[sym].st_name;
switch (type)
{ Symbols::Add(symtab[sym].st_value, name, size, type);
case STT_OBJECT:
symtype = Symbol::SYMBOL_DATA; break;
case STT_FUNC:
symtype = Symbol::SYMBOL_FUNCTION; break;
default:
continue;
}
g_symbolDB.AddKnownSymbol(value, size, name, symtype);
hasSymbols = true; hasSymbols = true;
} }
} }
g_symbolDB.Index();
return hasSymbols; return hasSymbols;
} }
*/