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authorRich Felker <dalias@aerifal.cx>2011-06-18 19:48:42 -0400
committerRich Felker <dalias@aerifal.cx>2011-06-18 19:48:42 -0400
commit51e2d8310222ddd4d4e895f55c627100d863aa95 (patch)
treed64c18bacc3fc0609abc2d88d6d336f84d3e4e74 /arch/x86_64
parentd43ff110bcb258df61448d21da3b1a89088388f6 (diff)
downloadmusl-51e2d8310222ddd4d4e895f55c627100d863aa95.tar.gz
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
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/reloc.h28
1 files changed, 28 insertions, 0 deletions
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 <stdint.h>
+#include <string.h>
+#include <elf.h>
+
+#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;
+ }
+}