[PATCH] D25815: [AMDGPU] Handle R_AMDGPU_ABS64 relocation
Konstantin Zhuravlyov via llvm-commits
llvm-commits at lists.llvm.org
Wed Oct 19 23:22:01 PDT 2016
kzhuravl created this revision.
kzhuravl added reviewers: tstellarAMD, ruiu, rafael.
kzhuravl added a subscriber: llvm-commits.
Herald added subscribers: tony-tye, yaxunl, nhaehnle, wdng.
This is needed for the following case (OpenCL example):
__global int Var = 0;
__global int* Ptr[] = {&Var};
...
https://reviews.llvm.org/D25815
Files:
ELF/Target.cpp
test/ELF/amdgpu-relocs.s
Index: test/ELF/amdgpu-relocs.s
===================================================================
--- test/ELF/amdgpu-relocs.s
+++ test/ELF/amdgpu-relocs.s
@@ -5,7 +5,7 @@
# REQUIRES: amdgpu
- .text
+.text
kernel0:
s_mov_b32 s0, common_var0 at GOTPCREL+4
@@ -50,11 +50,21 @@
.local local_var1
.local local_var2
+# R_AMDGPU_ABS32:
.section nonalloc, "w", @progbits
.long var0, common_var2+4
.long var1, common_var1+8
.long var2, common_var0+12
+# R_AMDGPU_ABS64:
+.type ptr, @object
+.data
+ .globl ptr
+ .p2align 3
+ptr:
+ .quad temp
+ .size ptr, 8
+
# The relocation for local_var{0, 1, 2} and var should be resolved by the
# linker.
# CHECK: Relocations [
@@ -68,6 +78,7 @@
# CHECK-NEXT: R_AMDGPU_ABS64 global_var0 0x0
# CHECK-NEXT: R_AMDGPU_ABS64 global_var1 0x0
# CHECK-NEXT: R_AMDGPU_ABS64 global_var2 0x0
+# CHECK-NEXT: R_AMDGPU_ABS64 temp 0x0
# CHECK-NEXT: R_AMDGPU_ABS64 weak_var0 0x0
# CHECK-NEXT: R_AMDGPU_ABS64 weak_var1 0x0
# CHECK-NEXT: R_AMDGPU_ABS64 weak_var2 0x0
@@ -78,5 +89,5 @@
# CHECK-NEXT: ]
# OBJDUMP: Contents of section nonalloc:
-# OBJDUMP-NEXT: 0000 00000000 04380000 00000000 08340000
-# OBJDUMP-NEXT: 00000000 0c300000
+# OBJDUMP-NEXT: 0000 00000000 14380000 00000000 18340000
+# OBJDUMP-NEXT: 00000000 1c300000
Index: ELF/Target.cpp
===================================================================
--- ELF/Target.cpp
+++ ELF/Target.cpp
@@ -1488,14 +1488,18 @@
case R_AMDGPU_REL32_HI:
write32le(Loc, Val >> 32);
break;
+ case R_AMDGPU_ABS64:
+ write64le(Loc, Val);
+ break;
default:
fatal("unrecognized reloc " + Twine(Type));
}
}
RelExpr AMDGPUTargetInfo::getRelExpr(uint32_t Type, const SymbolBody &S) const {
switch (Type) {
case R_AMDGPU_ABS32:
+ case R_AMDGPU_ABS64:
return R_ABS;
case R_AMDGPU_REL32:
case R_AMDGPU_REL32_LO:
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