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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
129 lines
4.1 KiB
ArmAsm
129 lines
4.1 KiB
ArmAsm
@ RUN: llvm-mc %s -triple=armv7-unknown-linux-gnueabi -filetype=obj -o - \
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@ RUN: | llvm-readobj -s -sd -sr -t | FileCheck %s
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@ Check whether the section is switched back properly.
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@ The assembler should switch the section back to the corresponding section
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@ after it have emitted the exception handling indices and tables. In this
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@ test case, we are checking whether the section is correct when .section
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@ directives is used.
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@ In this example, func1 and func2 should be defined in .TEST1 section.
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@ It is incorrect if the func2 is in .text, .ARM.extab.TEST1, or
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@ .ARM.exidx.TEST1 sections.
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.syntax unified
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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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.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 .text section. This should be empty.
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@-------------------------------------------------------------------------------
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@ CHECK: Sections [
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@ CHECK: Section {
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@ CHECK: Name: .text
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@ CHECK: SectionData (
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@ CHECK: )
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@ CHECK: }
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@-------------------------------------------------------------------------------
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@ Check the .TEST1 section. There should be two "bx lr" instructions.
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@-------------------------------------------------------------------------------
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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 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.
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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 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: 0x8 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.
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@-------------------------------------------------------------------------------
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@ CHECK: Section {
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@ CHECK: Name: .ARM.exidx.TEST1
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@ CHECK: Link: 4
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@-------------------------------------------------------------------------------
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@ The first word should be the offset to .TEST1.
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@ The second word should be the offset to .ARM.extab.TEST1
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@-------------------------------------------------------------------------------
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@ CHECK: SectionData (
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@ CHECK: 0000: 00000000 00000000 04000000 08000000 |................|
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@ CHECK: )
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@ CHECK: }
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@ CHECK: ]
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@-------------------------------------------------------------------------------
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@ The first word of each entry should be relocated to .TEST1 section.
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@ The second word of each entry should be relocated to
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@ .ARM.extab.TESET1 section.
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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: 0x4 R_ARM_PREL31 .ARM.extab.TEST1 0x0
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@ CHECK: 0x8 R_ARM_PREL31 .TEST1 0x0
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@ CHECK: 0xC R_ARM_PREL31 .ARM.extab.TEST1 0x0
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@ CHECK: ]
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@-------------------------------------------------------------------------------
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@ Check the symbols "func1" and "func2". They should belong to .TEST1 section.
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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: Value: 0x0
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@ CHECK: Size: 0
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@ CHECK: Binding: Global (0x1)
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@ CHECK: Type: Function (0x2)
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@ CHECK: Other: 0
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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: Value: 0x4
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@ CHECK: Size: 0
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@ CHECK: Binding: Global (0x1)
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@ CHECK: Type: Function (0x2)
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@ CHECK: Other: 0
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@ CHECK: Section: .TEST1 (0x4)
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@ CHECK: }
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@ CHECK: ]
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