| # REQUIRES: x86 |
| # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t |
| |
| ## First check that section "keep" is garbage collected without using KEEP |
| # RUN: echo "SECTIONS { \ |
| # RUN: .text : { *(.text) } \ |
| # RUN: .keep : { *(.keep) } \ |
| # RUN: .temp : { *(.temp) }}" > %t.script |
| # RUN: ld.lld --gc-sections -o %t1 --script %t.script %t |
| # RUN: llvm-objdump -section-headers %t1 | \ |
| # RUN: FileCheck -check-prefix=SECGC %s |
| # SECGC: Sections: |
| # SECGC-NEXT: Idx Name Size Address Type |
| # SECGC-NEXT: 0 00000000 0000000000000000 |
| # SECGC-NEXT: 1 .text 00000007 0000000000000158 TEXT DATA |
| # SECGC-NEXT: 2 .temp 00000004 000000000000015f DATA |
| |
| ## Now apply KEEP command to preserve the section. |
| # RUN: echo "SECTIONS { \ |
| # RUN: .text : { *(.text) } \ |
| # RUN: .keep : { KEEP(*(.keep)) } \ |
| # RUN: .temp : { *(.temp) }}" > %t.script |
| # RUN: ld.lld --gc-sections -o %t1 --script %t.script %t |
| # RUN: llvm-objdump -section-headers %t1 | \ |
| # RUN: FileCheck -check-prefix=SECNOGC %s |
| # SECNOGC: Sections: |
| # SECNOGC-NEXT: Idx Name Size Address Type |
| # SECNOGC-NEXT: 0 00000000 0000000000000000 |
| # SECNOGC-NEXT: 1 .text 00000007 0000000000000158 TEXT DATA |
| # SECNOGC-NEXT: 2 .keep 00000004 000000000000015f DATA |
| # SECNOGC-NEXT: 3 .temp 00000004 0000000000000163 DATA |
| |
| ## A section name matches two entries in the SECTIONS directive. The |
| ## first one doesn't have KEEP, the second one does. If section that have |
| ## KEEP is the first in order then section is NOT collected. |
| # RUN: echo "SECTIONS { \ |
| # RUN: .keep : { KEEP(*(.keep)) } \ |
| # RUN: .nokeep : { *(.keep) }}" > %t.script |
| # RUN: ld.lld --gc-sections -o %t1 --script %t.script %t |
| # RUN: llvm-objdump -section-headers %t1 | FileCheck -check-prefix=MIXED1 %s |
| # MIXED1: Sections: |
| # MIXED1-NEXT: Idx Name Size Address Type |
| # MIXED1-NEXT: 0 00000000 0000000000000000 |
| # MIXED1-NEXT: 1 .keep 00000004 0000000000000120 DATA |
| # MIXED1-NEXT: 2 .temp 00000004 0000000000000124 DATA |
| # MIXED1-NEXT: 3 .text 00000007 0000000000000128 TEXT DATA |
| # MIXED1-NEXT: 4 .symtab 00000060 0000000000000000 |
| # MIXED1-NEXT: 5 .shstrtab 0000002d 0000000000000000 |
| # MIXED1-NEXT: 6 .strtab 00000012 0000000000000000 |
| |
| ## The same, but now section without KEEP is at first place. |
| ## gold and bfd linkers disagree here. gold collects .keep while |
| ## bfd keeps it. Our current behavior is compatible with bfd although |
| ## we can choose either way. |
| # RUN: echo "SECTIONS { \ |
| # RUN: .nokeep : { *(.keep) } \ |
| # RUN: .keep : { KEEP(*(.keep)) }}" > %t.script |
| # RUN: ld.lld --gc-sections -o %t1 --script %t.script %t |
| # RUN: llvm-objdump -section-headers %t1 | FileCheck -check-prefix=MIXED2 %s |
| # MIXED2: Sections: |
| # MIXED2-NEXT: Idx Name Size Address Type |
| # MIXED2-NEXT: 0 00000000 0000000000000000 |
| # MIXED2-NEXT: 1 .nokeep 00000004 0000000000000120 DATA |
| # MIXED2-NEXT: 2 .temp 00000004 0000000000000124 DATA |
| # MIXED2-NEXT: 3 .text 00000007 0000000000000128 TEXT DATA |
| # MIXED2-NEXT: 4 .symtab 00000060 0000000000000000 |
| # MIXED2-NEXT: 5 .shstrtab 0000002f 0000000000000000 |
| # MIXED2-NEXT: 6 .strtab 00000012 0000000000000000 |
| |
| .global _start |
| _start: |
| mov temp, %eax |
| |
| .section .keep, "a" |
| keep: |
| .long 1 |
| |
| .section .temp, "a" |
| temp: |
| .long 2 |
