6452b11fd8
Some ELF files produced by lld may have zero-size segment placeholders as shown below. Since GNU_STACK Offset is 0, the current code makes it the lowest used offset, and relocates all the segments over the ELF header. The resulting binary is total garbage. This change fixes how llvm-objcopy handles PT_PHDR properlly by treating ELF headers and the program header table as segments to allow the layout algorithm decide where those should go. Author: vit9696 Differential Revision: https://reviews.llvm.org/D42872 llvm-svn: 325189
112 lines
2.8 KiB
Plaintext
112 lines
2.8 KiB
Plaintext
# RUN: yaml2obj %s -o %t
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# RUN: llvm-objcopy %t %t2
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# RUN: llvm-readobj -program-headers %t2 | FileCheck %s
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!ELF
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FileHeader:
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Class: ELFCLASS32
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Machine: EM_ARM
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Sections:
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- Name: .text
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
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Address: 0x1000
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AddressAlign: 0x0000000000001000
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Content: "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
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- Name: .data
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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Address: 0x2000
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AddressAlign: 0x0000000000001000
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Content: "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
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- Name: .xdata
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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- Name: .after
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Type: SHT_NOBITS
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Flags: [ SHF_ALLOC ]
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Size: 64
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ProgramHeaders:
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- Type: PT_LOAD
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Flags: [ PF_X, PF_R ]
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VAddr: 0x1000
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PAddr: 0x1000
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Align: 0x1000
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Sections:
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- Section: .text
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- Type: PT_LOAD
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Flags: [ PF_R, PF_W ]
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VAddr: 0x2000
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PAddr: 0x2000
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Align: 0x1000
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Sections:
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- Section: .data
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- Type: 0x6474e551 # GNU_STACK
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Flags: [ PF_R, PF_W ]
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VAddr: 0x0000
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PAddr: 0x0000
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Align: 0x0000
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- Type: PT_LOAD
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Flags: [ PF_R ]
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VAddr: 0x2010
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PAddr: 0x2010
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Sections:
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- Section: .xdata
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- Section: .after
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#CHECK: ProgramHeaders [
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#CHECK-NEXT: ProgramHeader {
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#CHECK-NEXT: Type: PT_LOAD
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#CHECK-NEXT: Offset: 0x1000
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#CHECK-NEXT: VirtualAddress: 0x1000
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#CHECK-NEXT: PhysicalAddress: 0x1000
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#CHECK-NEXT: FileSize: 16
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#CHECK-NEXT: MemSize: 16
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#CHECK-NEXT: Flags [
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#CHECK-NEXT: PF_R
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#CHECK-NEXT: PF_X
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#CHECK-NEXT: ]
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#CHECK-NEXT: Alignment: 4096
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#CHECK-NEXT: }
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#CHECK-NEXT: ProgramHeader {
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#CHECK-NEXT: Type: PT_LOAD
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#CHECK-NEXT: Offset: 0x2000
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#CHECK-NEXT: VirtualAddress: 0x2000
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#CHECK-NEXT: PhysicalAddress: 0x2000
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#CHECK-NEXT: FileSize: 16
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#CHECK-NEXT: MemSize: 16
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#CHECK-NEXT: Flags [
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#CHECK-NEXT: PF_R
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#CHECK-NEXT: PF_W
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#CHECK-NEXT: ]
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#CHECK-NEXT: Alignment: 4096
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#CHECK-NEXT: }
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#CHECK-NEXT: ProgramHeader {
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#CHECK-NEXT: Type: PT_GNU_STACK
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#CHECK-NEXT: Offset: 0x0
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#CHECK-NEXT: VirtualAddress: 0x0
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#CHECK-NEXT: PhysicalAddress: 0x0
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#CHECK-NEXT: FileSize: 0
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#CHECK-NEXT: MemSize: 0
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#CHECK-NEXT: Flags [
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#CHECK-NEXT: PF_R
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#CHECK-NEXT: PF_W
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#CHECK-NEXT: ]
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#CHECK-NEXT: Alignment: 0
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#CHECK-NEXT: }
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#CHECK-NEXT: ProgramHeader {
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#CHECK-NEXT: Type: PT_LOAD
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#CHECK-NEXT: Offset: 0x2010
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#CHECK-NEXT: VirtualAddress: 0x2010
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#CHECK-NEXT: PhysicalAddress: 0x2010
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#CHECK-NEXT: FileSize: 0
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#CHECK-NEXT: MemSize: 64
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#CHECK-NEXT: Flags [
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#CHECK-NEXT: PF_R
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#CHECK-NEXT: ]
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#CHECK-NEXT: Alignment: 1
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#CHECK-NEXT: }
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#CHECK-NEXT:]
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