| // Should set the value of the "_end" symbol to the end of the data segment. |
| // REQUIRES: x86 |
| |
| // RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o |
| |
| // By default, the .bss section is the latest section of the data segment. |
| // RUN: ld.lld %t.o -o %t |
| // RUN: llvm-readobj -sections -symbols %t | FileCheck %s --check-prefix=DEFAULT |
| |
| // DEFAULT: Sections [ |
| // DEFAULT: Name: .bss |
| // DEFAULT-NEXT: Type: |
| // DEFAULT-NEXT: Flags [ |
| // DEFAULT-NEXT: SHF_ALLOC |
| // DEFAULT-NEXT: SHF_WRITE |
| // DEFAULT-NEXT: ] |
| // DEFAULT-NEXT: Address: 0x12002 |
| // DEFAULT-NEXT: Offset: |
| // DEFAULT-NEXT: Size: 6 |
| // DEFAULT: ] |
| // DEFAULT: Symbols [ |
| // DEFAULT: Name: _end |
| // DEFAULT-NEXT: Value: 0x12008 |
| // DEFAULT: ] |
| |
| // If there is no .bss section, "_end" should point to the end of the .data section. |
| // RUN: echo "SECTIONS { \ |
| // RUN: /DISCARD/ : { *(.bss) } }" > %t.script |
| // RUN: ld.lld %t.o --script %t.script -o %t |
| // RUN: llvm-readobj -sections -symbols %t | FileCheck %s --check-prefix=NOBSS |
| |
| // NOBSS: Sections [ |
| // NOBSS: Name: .data |
| // NOBSS-NEXT: Type: |
| // NOBSS-NEXT: Flags [ |
| // NOBSS-NEXT: SHF_ALLOC |
| // NOBSS-NEXT: SHF_WRITE |
| // NOBSS-NEXT: ] |
| // NOBSS-NEXT: Address: 0x12000 |
| // NOBSS-NEXT: Offset: |
| // NOBSS-NEXT: Size: 2 |
| // NOBSS: ] |
| // NOBSS: Symbols [ |
| // NOBSS: Name: _end |
| // NOBSS-NEXT: Value: 0x12002 |
| // NOBSS: ] |
| |
| // If the layout of the sections is changed, "_end" should point to the end of allocated address space. |
| // RUN: echo "SECTIONS { \ |
| // RUN: .bss : { *(.bss) } \ |
| // RUN: .data : { *(.data) } \ |
| // RUN: .text : { *(.text) } }" > %t.script |
| // RUN: ld.lld %t.o --script %t.script -o %t |
| // RUN: llvm-readobj -sections -symbols %t | FileCheck %s --check-prefix=TEXTATEND |
| |
| // TEXTATEND: Sections [ |
| // TEXTATEND: Name: .text |
| // TEXTATEND-NEXT: Type: |
| // TEXTATEND-NEXT: Flags [ |
| // TEXTATEND-NEXT: SHF_ALLOC |
| // TEXTATEND-NEXT: SHF_EXECINSTR |
| // TEXTATEND-NEXT: ] |
| // TEXTATEND-NEXT: Address: 0x12000 |
| // TEXTATEND-NEXT: Offset: |
| // TEXTATEND-NEXT: Size: 1 |
| // TEXTATEND: ] |
| // TEXTATEND: Symbols [ |
| // TEXTATEND: Name: _end |
| // TEXTATEND-NEXT: Value: 0x12001 |
| // TEXTATEND: ] |
| |
| .global _start,_end |
| .text |
| _start: |
| nop |
| .data |
| .word 1 |
| .bss |
| .space 6 |
