diff options
| -rw-r--r-- | subx/012elf.cc | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/subx/012elf.cc b/subx/012elf.cc index 6a31826e..11e0e4bc 100644 --- a/subx/012elf.cc +++ b/subx/012elf.cc @@ -66,6 +66,7 @@ void load_elf_contents(uint8_t* elf_contents, size_t size, int argc, char* argv[ assert(overlap.find(STACK_SEGMENT) == overlap.end()); Mem.push_back(vma(STACK_SEGMENT)); assert(overlap.find(AFTER_STACK) == overlap.end()); + // The stack grows downward. Reg[ESP].u = AFTER_STACK; Reg[EBP].u = 0; EIP = e_entry; @@ -130,10 +131,14 @@ void load_segment_from_program_header(uint8_t* elf_contents, int segment_index, :(before "End Includes") // Very primitive/fixed/insecure ELF segments for now. -// code: 0x09000000 -> 0x09ffffff -// stack: 0xbe000000 -> 0xb0000000 (downward) +// code: 0x09000000 -> 0x09ffffff (specified in ELF binary) +// data: 0x0a000000 -> 0x0affffff (specified in ELF binary) +// --- heap gets mmap'd somewhere here --- +// stack: 0xbdffffff -> 0xbd000000 (downward; not in ELF binary) +// argv hack: 0xbf000000 -> 0xc0000000 (not in ELF binary) const int CODE_SEGMENT = 0x09000000; -const int STACK_SEGMENT = 0xb0000000; +const int DATA_SEGMENT = 0x0a000000; +const int STACK_SEGMENT = 0xbd000000; const int AFTER_STACK = 0xbe000000; const int ARGV_DATA_SEGMENT = 0xbf000000; :(before "End Dump Info for Instruction") |