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https://github.com/c64scene-ar/llvm-6502.git
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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
108 lines
3.1 KiB
ArmAsm
108 lines
3.1 KiB
ArmAsm
@ RUN: llvm-mc %s -triple=armv7-unknown-linux-gnueabi -filetype=obj -o - \
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@ RUN: | llvm-readobj -s -sd -sr | FileCheck %s
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@ Check the .handlerdata directive (without .personality directive)
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.syntax unified
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@-------------------------------------------------------------------------------
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@ TEST1
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@-------------------------------------------------------------------------------
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.section .TEST1
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.globl func1
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.align 2
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.type func1,%function
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.fnstart
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func1:
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bx lr
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.handlerdata
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.fnend
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@ CHECK:Section {
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@ CHECK: Name: .TEST1
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@ CHECK: SectionData (
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@ CHECK: 0000: 1EFF2FE1 |../.|
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@ CHECK: )
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@ CHECK:}
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@ CHECK:Section {
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@ CHECK: Name: .ARM.extab.TEST1
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@ CHECK: SectionData (
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@ CHECK: 0000: B0B0B080 |....|
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@ CHECK: )
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@ CHECK:}
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@ CHECK:Section {
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@ CHECK: Name: .ARM.exidx.TEST1
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@ CHECK: SectionData (
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@ CHECK: 0000: 00000000 00000000 |........|
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@ CHECK: )
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@ CHECK:}
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@-------------------------------------------------------------------------------
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@ We should see a relocation entry to __aeabi_unwind_cpp_pr0, so that the
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@ linker can keep __aeabi_unwind_cpp_pr0.
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@-------------------------------------------------------------------------------
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@ CHECK: Relocations [
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@ CHECK: 0x0 R_ARM_PREL31 .TEST1 0x0
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@ CHECK: 0x0 R_ARM_NONE __aeabi_unwind_cpp_pr0 0x0
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@ CHECK: 0x4 R_ARM_PREL31 .ARM.extab.TEST1 0x0
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@ CHECK: ]
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@-------------------------------------------------------------------------------
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@ TEST2
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@-------------------------------------------------------------------------------
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.section .TEST2
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.globl func2
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.align 2
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.type func2,%function
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.fnstart
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func2:
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@-------------------------------------------------------------------------------
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@ Use a lot of unwind opcdes to get __aeabi_unwind_cpp_pr1.
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@-------------------------------------------------------------------------------
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.save {r4, r5, r6, r7, r8, r9, r10, r11, r12}
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push {r4, r5, r6, r7, r8, r9, r10, r11, r12}
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pop {r4, r5, r6, r7, r8, r9, r10, r11, r12}
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.pad #0x240
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sub sp, sp, #0x240
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add sp, sp, #0x240
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bx lr
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.handlerdata
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.fnend
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@ CHECK:Section {
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@ CHECK: Name: .TEST2
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@ CHECK: SectionData (
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@ CHECK: 0000: F01F2DE9 F01FBDE8 09DD4DE2 09DD8DE2 |..-.......M.....|
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@ CHECK: 0010: 1EFF2FE1 |../.|
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@ CHECK: )
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@ CHECK:}
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@ CHECK:Section {
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@ CHECK: Name: .ARM.extab.TEST2
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@ CHECK: SectionData (
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@ CHECK: 0000: 0FB20181 B0B0FF81 |........|
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@ CHECK: )
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@ CHECK:}
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@ CHECK:Section {
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@ CHECK: Name: .ARM.exidx.TEST2
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@ CHECK: SectionData (
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@ CHECK: 0000: 00000000 00000000 |........|
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@ CHECK: )
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@ CHECK:}
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@-------------------------------------------------------------------------------
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@ We should see a relocation entry to __aeabi_unwind_cpp_pr0, so that the
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@ linker can keep __aeabi_unwind_cpp_pr0.
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@-------------------------------------------------------------------------------
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@ CHECK: Relocations [
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@ CHECK: 0x0 R_ARM_PREL31 .TEST2 0x0
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@ CHECK: 0x0 R_ARM_NONE __aeabi_unwind_cpp_pr1 0x0
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@ CHECK: 0x4 R_ARM_PREL31 .ARM.extab.TEST2 0x0
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@ CHECK: ]
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