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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
164 lines
5.7 KiB
ArmAsm
164 lines
5.7 KiB
ArmAsm
@ RUN: llvm-mc %s -triple=armv7-unknown-linux-gnueabi -filetype=obj -o - \
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@ RUN: | llvm-readobj -s -sd -sr -t | FileCheck %s
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@ Check the combination of .section, .fnstart, and .fnend directives.
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@ For the functions in .text section, the exception handling index (EXIDX)
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@ should be generated in .ARM.exidx, and the exception handling table (EXTAB)
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@ should be generated in .ARM.extab.
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@ For the functions in custom section specified by .section directives,
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@ the EXIDX should be generated in ".ARM.exidx[[SECTION_NAME]]", and the EXTAB
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@ should be generated in ".ARM.extab[[SECTION_NAME]]".
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.syntax unified
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@-------------------------------------------------------------------------------
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@ .TEST1 section
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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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.personality __gxx_personality_v0
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.handlerdata
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.fnend
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@-------------------------------------------------------------------------------
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@ TEST2 section (without the dot in the beginning)
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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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bx lr
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.personality __gxx_personality_v0
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.handlerdata
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.fnend
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@-------------------------------------------------------------------------------
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@ Check the .TEST1 section.
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@-------------------------------------------------------------------------------
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@ CHECK: Sections [
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@ CHECK: Section {
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@ CHECK: Index: 4
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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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@-------------------------------------------------------------------------------
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@ Check the .ARM.extab.TEST1 section, the EXTAB of .TEST1 section.
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@-------------------------------------------------------------------------------
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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: 00000000 B0B0B000 |........|
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@ CHECK: )
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@ CHECK: }
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@ CHECK: Relocations [
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@ CHECK: 0x0 R_ARM_PREL31 __gxx_personality_v0 0x0
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@ CHECK: ]
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@-------------------------------------------------------------------------------
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@ Check the.ARM.exidx.TEST1 section, the EXIDX of .TEST1 section.
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@-------------------------------------------------------------------------------
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@ CHECK: Section {
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@ CHECK: Name: .ARM.exidx.TEST1
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@-------------------------------------------------------------------------------
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@ This section should linked with .TEST1 section.
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@-------------------------------------------------------------------------------
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@ CHECK: Link: 4
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@-------------------------------------------------------------------------------
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@ The first word should be relocated to the code address in .TEST1 section.
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@ The second word should be relocated to the EHTAB entry in .ARM.extab.TEST1
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@ section.
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@-------------------------------------------------------------------------------
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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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@ CHECK: Relocations [
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@ CHECK: 0x0 R_ARM_PREL31 .TEST1 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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@ Check the TEST2 section (without the dot in the beginning)
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@-------------------------------------------------------------------------------
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@ CHECK: Section {
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@ CHECK: Index: 9
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@ CHECK: Name: TEST2
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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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@-------------------------------------------------------------------------------
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@ Check the .ARM.extabTEST2 section, the EXTAB of TEST2 section.
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@-------------------------------------------------------------------------------
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@ CHECK: Section {
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@ CHECK: Name: .ARM.extabTEST2
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@ CHECK: SectionData (
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@ CHECK: 0000: 00000000 B0B0B000 |........|
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@ CHECK: )
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@ CHECK: }
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@ CHECK: Relocations [
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@ CHECK: 0x0 R_ARM_PREL31 __gxx_personality_v0 0x0
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@ CHECK: ]
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@-------------------------------------------------------------------------------
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@ Check the .ARM.exidxTEST2 section, the EXIDX of TEST2 section.
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@-------------------------------------------------------------------------------
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@ CHECK: Section {
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@ CHECK: Name: .ARM.exidxTEST2
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@-------------------------------------------------------------------------------
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@ This section should linked with TEST2 section.
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@-------------------------------------------------------------------------------
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@ CHECK: Link: 9
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@-------------------------------------------------------------------------------
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@ The first word should be relocated to the code address in TEST2 section.
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@ The second word should be relocated to the EHTAB entry in .ARM.extabTEST2
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@ section.
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@-------------------------------------------------------------------------------
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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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@ CHECK: ]
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@ CHECK: Relocations [
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@ CHECK: 0x0 R_ARM_PREL31 TEST2 0x0
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@ CHECK: 0x4 R_ARM_PREL31 .ARM.extabTEST2 0x0
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@ CHECK: ]
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@-------------------------------------------------------------------------------
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@ Check the symbols and the sections they belong to
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@-------------------------------------------------------------------------------
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@ CHECK: Symbols [
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@ CHECK: Symbol {
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@ CHECK: Name: func1
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@ CHECK: Section: .TEST1 (0x4)
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@ CHECK: }
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@ CHECK: Symbol {
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@ CHECK: Name: func2
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@ CHECK: Section: TEST2 (0x9)
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@ CHECK: }
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@ CHECK: ]
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