chizui/Il2CppInspectorRedux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ELF: Implement GetSections() with both SHT and PHT

Browse Source
This commit is contained in:
Katy Coe
2020-12-04 15:40:16 +01:00
parent 5f03abcff7
commit bb0badeb40
2 changed files with 44 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
Il2CppInspector.Common/FileFormatReaders/ElfReader.cs
View File

@@ -463,6 +463,39 @@ namespace Il2CppInspector
return init_array.Select(x => MapVATR(x)).ToArray();
}
public override IEnumerable<Section> GetSections() {
// If the sections have been stripped, use the segment list from the PHT instead
if (section_header_table.All(s => conv.Int(s.sh_offset) == 0)) {
return program_header_table.Select(p => new Section {
VirtualStart = conv.ULong(p.p_vaddr),
VirtualEnd = conv.ULong(p.p_vaddr) + conv.ULong(p.p_memsz) - 1,
ImageStart = (uint) conv.Int(p.p_offset),
ImageEnd = (uint) conv.Int(p.p_offset) + (uint) conv.Int(p.p_filesz) - 1,
// Not correct but probably the best we can do
IsData = (Elf) p.p_type == Elf.PT_LOAD,
IsExec = (Elf) p.p_type == Elf.PT_LOAD,
IsBSS = (Elf) p.p_type == Elf.PT_LOAD,
Name = string.Empty
});
}
// Return sections list
return section_header_table.Select(s => new Section {
VirtualStart = conv.ULong(s.sh_addr),
VirtualEnd = conv.ULong(s.sh_addr) + conv.ULong(s.sh_size) - 1,
ImageStart = (uint) conv.Int(s.sh_offset),
ImageEnd = (uint) conv.Int(s.sh_offset) + (uint) conv.Int(s.sh_size) - 1,
IsData = ((Elf) conv.Int(s.sh_flags) & Elf.SHF_ALLOC) == Elf.SHF_ALLOC && ((Elf) conv.Int(s.sh_flags) & Elf.SHF_EXECINSTR) == 0 && ((Elf) s.sh_type & Elf.SHT_PROGBITS) == Elf.SHT_PROGBITS,
IsExec = ((Elf) conv.Int(s.sh_flags) & Elf.SHF_EXECINSTR) == Elf.SHF_EXECINSTR && ((Elf) s.sh_type & Elf.SHT_PROGBITS) == Elf.SHT_PROGBITS,
IsBSS = ((Elf) s.sh_type & Elf.SHT_NOBITS) == Elf.SHT_NOBITS,
Name = sectionByName.First(sbn => conv.Int(sbn.Value.sh_offset) == conv.Int(s.sh_offset)).Key
});
}
// Map a virtual address to an offset into the image file. Throws an exception if the virtual address is not mapped into the file.
// Note if uiAddr is a valid segment but filesz < memsz and the adjusted uiAddr falls between the range of filesz and memsz,
// an exception will be thrown. This area of memory is assumed to contain all zeroes.

13
Il2CppInspector.Common/FileFormatReaders/FormatLayouts/Elf.cs
View File

@@ -37,9 +37,11 @@ namespace Il2CppInspector
PF_X = 1,
// SHTs
SHT_PROGBITS = 1,
SHT_SYMTAB = 2,
SHT_STRTAB = 3,
SHT_RELA = 4,
SHT_NOBITS = 8,
SHT_REL = 9,
SHT_DYNSYM = 11,
@@ -59,6 +61,10 @@ namespace Il2CppInspector
STT_SPARC_REGISTER = 13,
STT_HIPROC = 15,
// SHFs
SHF_ALLOC = 2,
SHF_EXECINSTR = 4,
// dynamic sections
DT_STRTAB = 5,
DT_SYMTAB = 6,
@@ -146,6 +152,7 @@ namespace Il2CppInspector
uint p_type { get; }
TWord p_offset { get; }
TWord p_filesz { get; }
TWord p_memsz { get; }
TWord p_vaddr { get; }
uint p_flags { get; }
}
@@ -157,13 +164,14 @@ namespace Il2CppInspector
public uint p_filesz => f_p_filesz;
public uint p_vaddr => f_p_vaddr;
public uint p_flags => f_p_flags;
public uint p_memsz => f_p_memsz;
public uint f_p_type;
public uint f_p_offset;
public uint f_p_vaddr;
public uint p_paddr;
public uint f_p_filesz;
public uint p_memsz;
public uint f_p_memsz;
public uint f_p_flags;
public uint p_align;
}
@@ -173,6 +181,7 @@ namespace Il2CppInspector
public uint p_type => f_p_type;
public ulong p_offset => f_p_offset;
public ulong p_filesz => f_p_filesz;
public ulong p_memsz => f_p_memsz;
public ulong p_vaddr => f_p_vaddr;
public uint p_flags => f_p_flags;
@@ -182,7 +191,7 @@ namespace Il2CppInspector
public ulong f_p_vaddr;
public ulong p_paddr;
public ulong f_p_filesz;
public ulong p_memsz;
public ulong f_p_memsz;
public ulong p_align;
}