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7486d92a6c
For COFF and MachO, sections semantically have relocations that apply to them. That is not the case on ELF. In relocatable objects (.o), a section with relocations in ELF has offsets to another section where the relocations should be applied. In dynamic objects and executables, relocations don't have an offset, they have a virtual address. The section sh_info may or may not point to another section, but that is not actually used for resolving the relocations. This patch exposes that in the ObjectFile API. It has the following advantages: * Most (all?) clients can handle this more efficiently. They will normally walk all relocations, so doing an effort to iterate in a particular order doesn't save time. * llvm-readobj now prints relocations in the same way the native readelf does. * probably most important, relocations that don't point to any section are now visible. This is the case of relocations in the rela.dyn section. See the updated relocation-executable.test for example. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182908 91177308-0d34-0410-b5e6-96231b3b80d8
42 lines
1.0 KiB
LLVM
42 lines
1.0 KiB
LLVM
; RUN: llc %s -mtriple=thumbv7-linux-gnueabi -relocation-model=pic \
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; RUN: -filetype=obj -o - | llvm-readobj -s -sd -r -t | \
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; RUN: FileCheck %s
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; FIXME: This file needs to be in .s form!
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; We wanna test relocatable thumb function call,
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; but ARMAsmParser cannot handle "bl foo(PLT)" yet
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target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:64:128-a0:0:32-n32"
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target triple = "thumbv7-none--gnueabi"
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define void @foo() nounwind {
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entry:
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ret void
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}
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define void @bar() nounwind {
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entry:
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call void @foo()
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ret void
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}
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; make sure that bl 0 <foo> (fff7feff) is correctly encoded
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; CHECK: Sections [
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; CHECK: SectionData (
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; CHECK: 0000: 704700BF 2DE90048 FFF7FEFF BDE80088
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; CHECK: )
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; CHECK: ]
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; CHECK: Relocations [
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; CHECK-NEXT: Section (2) .rel.text {
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; CHECK-NEXT: 0x8 R_ARM_THM_CALL foo 0x0
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; CHECK-NEXT: }
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; CHECK-NEXT: ]
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; make sure foo is thumb function: bit 0 = 1
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; CHECK: Symbols [
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; CHECK: Symbol {
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; CHECK: Name: foo
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; CHECK-NEXT: Value: 0x1
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