337139830e
After Mark's patch I was wondering what was the rationale for the ELF spec requiring us to merge only sections with matching flags and types. I tried emailing https://groups.google.com/forum/#!forum/generic-abi, but looks like my emails are not being posted (the list is probably moderated). I emailed Cary Coutant instead. Cary pointed out that the section was a late addition and didn't got the scrutiny it deserved. Given that and the problems found by implementing the letter of the standard, I propose changing lld to merge all sections with the same name and issue errors if the types or some critical flags are different. This should allow an unmodified firefox linked with lld to run. This also merges some code with the linkerscript path. llvm-svn: 291107
144 lines
4.7 KiB
ArmAsm
144 lines
4.7 KiB
ArmAsm
# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
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# RUN: echo "PHDRS {all PT_LOAD FILEHDR PHDRS ;} \
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# RUN: SECTIONS { \
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# RUN: . = 0x10000200; \
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# RUN: .text : {*(.text*)} :all \
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# RUN: .foo : {*(.foo.*)} :all \
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# RUN: .data : {*(.data.*)} :all}" > %t.script
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# RUN: ld.lld -o %t1 --script %t.script %t
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# RUN: llvm-readobj -program-headers %t1 | FileCheck %s
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## Check that program headers are not written, unless we explicitly tell
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## lld to do this.
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# RUN: echo "PHDRS {all PT_LOAD;} \
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# RUN: SECTIONS { \
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# RUN: . = 0x10000200; \
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# RUN: /DISCARD/ : {*(.text*)} \
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# RUN: .foo : {*(.foo.*)} :all \
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# RUN: }" > %t.script
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# RUN: ld.lld -o %t1 --script %t.script %t
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# RUN: llvm-readobj -program-headers %t1 | FileCheck --check-prefix=NOPHDR %s
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## Check the AT(expr)
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# RUN: echo "PHDRS {all PT_LOAD FILEHDR PHDRS AT(0x500 + 0x500) ;} \
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# RUN: SECTIONS { \
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# RUN: . = 0x10000200; \
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# RUN: .text : {*(.text*)} :all \
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# RUN: .foo : {*(.foo.*)} :all \
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# RUN: .data : {*(.data.*)} :all}" > %t.script
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# RUN: ld.lld -o %t1 --script %t.script %t
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# RUN: llvm-readobj -program-headers %t1 | FileCheck --check-prefix=AT %s
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# RUN: echo "PHDRS {all PT_LOAD FILEHDR PHDRS ;} \
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# RUN: SECTIONS { \
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# RUN: . = 0x10000200; \
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# RUN: .text : {*(.text*)} :all \
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# RUN: .foo : {*(.foo.*)} \
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# RUN: .data : {*(.data.*)} }" > %t.script
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# RUN: ld.lld -o %t1 --script %t.script %t
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# RUN: llvm-readobj -program-headers %t1 | FileCheck --check-prefix=DEFHDR %s
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## Check that error is reported when trying to use phdr which is not listed
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## inside PHDRS {} block
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## TODO: If script doesn't contain PHDRS {} block then default phdr is always
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## created and error is not reported.
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# RUN: echo "PHDRS { all PT_LOAD; } \
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# RUN: SECTIONS { .baz : {*(.foo.*)} :bar }" > %t.script
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# RUN: not ld.lld -o %t1 --script %t.script %t 2>&1 | FileCheck --check-prefix=BADHDR %s
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# CHECK: ProgramHeaders [
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# CHECK-NEXT: ProgramHeader {
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# CHECK-NEXT: Type: PT_LOAD (0x1)
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# CHECK-NEXT: Offset: 0x0
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# CHECK-NEXT: VirtualAddress: 0x10000000
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# CHECK-NEXT: PhysicalAddress: 0x10000000
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# CHECK-NEXT: FileSize: 521
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# CHECK-NEXT: MemSize: 521
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# CHECK-NEXT: Flags [ (0x7)
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# CHECK-NEXT: PF_R (0x4)
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# CHECK-NEXT: PF_W (0x2)
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# CHECK-NEXT: PF_X (0x1)
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# CHECK-NEXT: ]
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# NOPHDR: ProgramHeaders [
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# NOPHDR-NEXT: ProgramHeader {
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# NOPHDR-NEXT: Type: PT_LOAD (0x1)
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# NOPHDR-NEXT: Offset: 0x200
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# NOPHDR-NEXT: VirtualAddress: 0x10000200
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# NOPHDR-NEXT: PhysicalAddress: 0x10000200
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# NOPHDR-NEXT: FileSize: 8
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# NOPHDR-NEXT: MemSize: 8
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# NOPHDR-NEXT: Flags [ (0x6)
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# NOPHDR-NEXT: PF_R (0x4)
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# NOPHDR-NEXT: PF_W (0x2)
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# NOPHDR-NEXT: ]
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# NOPHDR-NEXT: Alignment: 4096
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# NOPHDR-NEXT: }
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# NOPHDR-NEXT: ]
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# AT: ProgramHeaders [
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# AT-NEXT: ProgramHeader {
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# AT-NEXT: Type: PT_LOAD (0x1)
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# AT-NEXT: Offset: 0x0
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# AT-NEXT: VirtualAddress: 0x10000000
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# AT-NEXT: PhysicalAddress: 0xA00
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# AT-NEXT: FileSize: 521
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# AT-NEXT: MemSize: 521
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# AT-NEXT: Flags [ (0x7)
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# AT-NEXT: PF_R (0x4)
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# AT-NEXT: PF_W (0x2)
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# AT-NEXT: PF_X (0x1)
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# AT-NEXT: ]
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## Check the numetic values for PHDRS.
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# RUN: echo "PHDRS {text PT_LOAD FILEHDR PHDRS; foo 0x11223344; } \
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# RUN: SECTIONS { . = SIZEOF_HEADERS; .foo : { *(.foo* .text*) } : text : foo}" > %t1.script
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# RUN: ld.lld -o %t2 --script %t1.script %t
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# RUN: llvm-readobj -program-headers %t2 | FileCheck --check-prefix=INT-PHDRS %s
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# INT-PHDRS: ProgramHeaders [
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# INT-PHDRS: ProgramHeader {
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# INT-PHDRS: Type: (0x11223344)
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# INT-PHDRS-NEXT: Offset: 0xB0
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# INT-PHDRS-NEXT: VirtualAddress: 0xB0
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# INT-PHDRS-NEXT: PhysicalAddress: 0xB0
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# INT-PHDRS-NEXT: FileSize:
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# INT-PHDRS-NEXT: MemSize:
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# INT-PHDRS-NEXT: Flags [
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# INT-PHDRS-NEXT: PF_R
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# INT-PHDRS-NEXT: PF_W
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# INT-PHDRS-NEXT: PF_X
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# INT-PHDRS-NEXT: ]
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# INT-PHDRS-NEXT: Alignment:
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# INT-PHDRS-NEXT: }
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# INT-PHDRS-NEXT: ]
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# DEFHDR: ProgramHeaders [
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# DEFHDR-NEXT: ProgramHeader {
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# DEFHDR-NEXT: Type: PT_LOAD (0x1)
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# DEFHDR-NEXT: Offset: 0x0
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# DEFHDR-NEXT: VirtualAddress: 0x10000000
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# DEFHDR-NEXT: PhysicalAddress: 0x10000000
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# DEFHDR-NEXT: FileSize: 521
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# DEFHDR-NEXT: MemSize: 521
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# DEFHDR-NEXT: Flags [ (0x7)
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# DEFHDR-NEXT: PF_R (0x4)
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# DEFHDR-NEXT: PF_W (0x2)
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# DEFHDR-NEXT: PF_X (0x1)
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# DEFHDR-NEXT: ]
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# BADHDR: {{.*}}.script:1: section header 'bar' is not listed in PHDRS
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.global _start
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_start:
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nop
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.section .foo.1,"a"
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foo1:
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.long 0
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.section .foo.2,"aw"
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foo2:
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.long 0
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