Jim Grosbach f8c1c8465f MCJIT lazy relocation resolution and symbol address re-assignment. ... Add handling for tracking the relocations on symbols and resolving them. Keep track of the relocations even after they are resolved so that if the RuntimeDyld client moves the object, it can update the address and any relocations to that object will be updated. For our trival object file load/run test harness (llvm-rtdyld), this enables relocations between functions located in the same object module. It should be trivially extendable to load multiple objects with mutual references. As a simple example, the following now works (running on x86_64 Darwin 10.6): $ cat t.c int bar() { return 65; } int main() { return bar(); } $ clang t.c -fno-asynchronous-unwind-tables -o t.o -c $ otool -vt t.o t.o: (__TEXT,__text) section _bar: 0000000000000000 pushq %rbp 0000000000000001 movq %rsp,%rbp 0000000000000004 movl $0x00000041,%eax 0000000000000009 popq %rbp 000000000000000a ret 000000000000000b nopl 0x00(%rax,%rax) _main: 0000000000000010 pushq %rbp 0000000000000011 movq %rsp,%rbp 0000000000000014 subq $0x10,%rsp 0000000000000018 movl $0x00000000,0xfc(%rbp) 000000000000001f callq 0x00000024 0000000000000024 addq $0x10,%rsp 0000000000000028 popq %rbp 0000000000000029 ret $ llvm-rtdyld t.o -debug-only=dyld ; echo $? Function sym: '_bar' @ 0 Function sym: '_main' @ 16 Extracting function: _bar from [0, 15] allocated to 0x100153000 Extracting function: _main from [16, 41] allocated to 0x100154000 Relocation at '_main' + 16 from '_bar(Word1: 0x2d000000) Resolving relocation at '_main' + 16 (0x100154010) from '_bar (0x100153000)(pcrel, type: 2, Size: 4). loaded '_main' at: 0x100154000 65 $ git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129388 91177308-0d34-0410-b5e6-96231b3b80d8		2011-04-12 21:20:41 +00:00
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CMakeLists.txt
Makefile
RuntimeDyld.cpp	MCJIT lazy relocation resolution and symbol address re-assignment.	2011-04-12 21:20:41 +00:00