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fa73d7c8a9
Currenly we can encode the 'st_other' field of symbol using 3 fields. 'Visibility' is used to encode STV_* values. 'Other' is used to encode everything except the visibility, but it can't handle arbitrary values. 'StOther' is used to encode arbitrary values when 'Visibility'/'Other' are not helpfull enough. 'st_other' field is used to encode symbol visibility and platform-dependent flags and values. Problem to encode it is that it consists of Visibility part (STV_* values) which are enumeration values and the Other part, which is different and inconsistent. For MIPS the Other part contains flags for all STO_MIPS_* values except STO_MIPS_MIPS16. (Like comment in ELFDumper says: "Someones in their infinite wisdom decided to make STO_MIPS_MIPS16 flag overlapped with other ST_MIPS_xxx flags."...) And for PPC64 the Other part might actually encode any value. This patch implements custom logic for handling the st_other and removes 'Visibility' and 'StOther' fields. Here is an example of a new YAML style this patch allows: - Name: foo Other: [ 0x4 ] - Name: bar Other: [ STV_PROTECTED, 4 ] - Name: zed Other: [ STV_PROTECTED, STO_MIPS_OPTIONAL, 0xf8 ] Differential revision: https://reviews.llvm.org/D66886 llvm-svn: 370472
132 lines
3.2 KiB
Plaintext
132 lines
3.2 KiB
Plaintext
# RUN: yaml2obj %s > %t
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# RUN: llvm-objcopy %t %t2
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# RUN: llvm-readobj --symbols %t2 | FileCheck %s
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!ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Machine: EM_X86_64
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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: 0x0000000000000010
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Content: "0000000000000000"
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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: 0x0000000000000010
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Content: "0000000000000000"
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Symbols:
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- Name: _start
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Type: STT_FUNC
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Section: .text
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Value: 0x1000
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Size: 4
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Binding: STB_GLOBAL
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- Name: bam
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Type: STT_FUNC
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Section: .text
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Value: 0x1001
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Size: 4
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Other: [ STV_HIDDEN ]
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Binding: STB_GLOBAL
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- Name: foo
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Type: STT_FUNC
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Section: .text
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Value: 0x1004
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Binding: STB_GLOBAL
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- Name: faz
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Type: STT_OBJECT
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Section: .data
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Value: 0x2002
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Size: 2
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Other: [ STV_INTERNAL ]
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Binding: STB_GLOBAL
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- Name: bar
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Type: STT_OBJECT
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Section: .data
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Value: 0x2000
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Size: 4
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Binding: STB_GLOBAL
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- Name: baz
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Type: STT_OBJECT
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Section: .data
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Value: 0x2004
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Size: 4
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Binding: STB_GLOBAL
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#CHECK: Symbols [
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#CHECK-NEXT: Symbol {
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#CHECK-NEXT: Name:
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#CHECK-NEXT: Value: 0x0
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#CHECK-NEXT: Size: 0
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#CHECK-NEXT: Binding: Local
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#CHECK-NEXT: Type: None
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#CHECK-NEXT: Other: 0
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#CHECK-NEXT: Section: Undefined
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#CHECK-NEXT: }
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#CHECK-NEXT: Symbol {
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#CHECK-NEXT: Name: _start
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#CHECK-NEXT: Value: 0x1000
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#CHECK-NEXT: Size: 4
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#CHECK-NEXT: Binding: Global
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#CHECK-NEXT: Type: Function
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#CHECK-NEXT: Other: 0
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#CHECK-NEXT: Section: .text
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#CHECK-NEXT: }
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#CHECK-NEXT: Symbol {
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#CHECK-NEXT: Name: bam
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#CHECK-NEXT: Value: 0x1001
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#CHECK-NEXT: Size: 4
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#CHECK-NEXT: Binding: Global
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#CHECK-NEXT: Type: Function
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#CHECK-NEXT: Other [
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#CHECK-NEXT: STV_HIDDEN
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#CHECK-NEXT: ]
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#CHECK-NEXT: Section: .text
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#CHECK-NEXT: }
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#CHECK-NEXT: Symbol {
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#CHECK-NEXT: Name: foo
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#CHECK-NEXT: Value: 0x1004
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#CHECK-NEXT: Size: 0
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#CHECK-NEXT: Binding: Global
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#CHECK-NEXT: Type: Function
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#CHECK-NEXT: Other: 0
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#CHECK-NEXT: Section: .text
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#CHECK-NEXT: }
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#CHECK-NEXT: Symbol {
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#CHECK-NEXT: Name: faz
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#CHECK-NEXT: Value: 0x2002
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#CHECK-NEXT: Size: 2
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#CHECK-NEXT: Binding: Global
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#CHECK-NEXT: Type: Object
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#CHECK-NEXT: Other [
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#CHECK-NEXT: STV_INTERNAL
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#CHECK-NEXT: ]
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#CHECK-NEXT: Section: .data
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#CHECK-NEXT: }
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#CHECK-NEXT: Symbol {
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#CHECK-NEXT: Name: bar
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#CHECK-NEXT: Value: 0x2000
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#CHECK-NEXT: Size: 4
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#CHECK-NEXT: Binding: Global
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#CHECK-NEXT: Type: Object
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#CHECK-NEXT: Other: 0
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#CHECK-NEXT: Section: .data
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#CHECK-NEXT: }
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#CHECK-NEXT: Symbol {
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#CHECK-NEXT: Name: baz
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#CHECK-NEXT: Value: 0x2004
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#CHECK-NEXT: Size: 4
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#CHECK-NEXT: Binding: Global
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#CHECK-NEXT: Type: Object
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#CHECK-NEXT: Other: 0
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#CHECK-NEXT: Section: .data
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#CHECK-NEXT: }
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#CHECK-NEXT:]
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