From 51e2d8310222ddd4d4e895f55c627100d863aa95 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 18 Jun 2011 19:48:42 -0400 Subject: experimental dynamic linker! some notes: - library search path is hard coded - x86_64 code is untested and may not work - dlopen/dlsym is not yet implemented - relocations in read-only memory won't work --- arch/x86_64/reloc.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 arch/x86_64/reloc.h (limited to 'arch/x86_64') diff --git a/arch/x86_64/reloc.h b/arch/x86_64/reloc.h new file mode 100644 index 00000000..2db6115d --- /dev/null +++ b/arch/x86_64/reloc.h @@ -0,0 +1,28 @@ +#include +#include +#include + +#define IS_COPY(x) ((x)==R_X86_64_COPY) + +static inline void do_single_reloc(size_t *reloc_addr, int type, size_t sym_val, size_t sym_size, unsigned char *base_addr, size_t addend) +{ + switch(type) { + case R_X86_64_GLOB_DAT: + case R_X86_64_JUMP_SLOT: + case R_X86_64_64: + *reloc_addr = sym_val + addend; + break; + case R_X86_64_32: + *(uint32_t *)reloc_addr = sym_val + addend; + break; + case R_X86_64_PC32: + *reloc_addr = sym_val + addend - (size_t)reloc_addr + (size_t)base_addr; + break; + case R_X86_64_RELATIVE: + *reloc_addr = (size_t)base_addr + addend; + break; + case R_X86_64_COPY: + memcpy(reloc_addr, (void *)sym_val, sym_size); + break; + } +} -- cgit v1.2.1