| # REQUIRES: x86 |
| # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o |
| # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/keep.s -o %t1.o |
| |
| ## 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 %t --script %t.script %t.o |
| # RUN: llvm-objdump -section-headers %t | \ |
| # RUN: FileCheck -check-prefix=SECGC %s |
| # SECGC: Sections: |
| # SECGC-NEXT: Idx Name Size |
| # SECGC-NEXT: 0 00000000 |
| # SECGC-NEXT: 1 .text 00000007 |
| # SECGC-NEXT: 2 .temp 00000004 |
| |
| ## 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 %t --script %t.script %t.o |
| # RUN: llvm-objdump -section-headers %t | \ |
| # RUN: FileCheck -check-prefix=SECNOGC %s |
| # SECNOGC: Sections: |
| # SECNOGC-NEXT: Idx Name Size |
| # SECNOGC-NEXT: 0 00000000 |
| # SECNOGC-NEXT: 1 .text 00000007 |
| # SECNOGC-NEXT: 2 .keep 00000004 |
| # SECNOGC-NEXT: 3 .temp 00000004 |
| |
| ## 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: . = SIZEOF_HEADERS; \ |
| # RUN: .keep : { KEEP(*(.keep)) } \ |
| # RUN: .nokeep : { *(.keep) }}" > %t.script |
| # RUN: ld.lld --gc-sections -o %t --script %t.script %t.o |
| # RUN: llvm-objdump -section-headers %t | FileCheck -check-prefix=MIXED1 %s |
| # MIXED1: Sections: |
| # MIXED1-NEXT: Idx Name Size |
| # MIXED1-NEXT: 0 00000000 |
| # MIXED1-NEXT: 1 .keep 00000004 |
| # MIXED1-NEXT: 2 .temp 00000004 00000000000000ec |
| # MIXED1-NEXT: 3 .text 00000007 00000000000000f0 |
| # MIXED1-NEXT: 4 .comment 00000008 0000000000000000 |
| # MIXED1-NEXT: 5 .symtab 00000060 0000000000000000 |
| # MIXED1-NEXT: 6 .shstrtab 00000036 0000000000000000 |
| # MIXED1-NEXT: 7 .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: . = SIZEOF_HEADERS; \ |
| # RUN: .nokeep : { *(.keep) } \ |
| # RUN: .keep : { KEEP(*(.keep)) }}" > %t.script |
| # RUN: ld.lld --gc-sections -o %t --script %t.script %t.o |
| # RUN: llvm-objdump -section-headers %t | FileCheck -check-prefix=MIXED2 %s |
| # MIXED2: Sections: |
| # MIXED2-NEXT: Idx Name Size |
| # MIXED2-NEXT: 0 00000000 |
| # MIXED2-NEXT: 1 .nokeep 00000004 00000000000000e8 |
| # MIXED2-NEXT: 2 .temp 00000004 00000000000000ec |
| # MIXED2-NEXT: 3 .text 00000007 00000000000000f0 |
| # MIXED2-NEXT: 4 .comment 00000008 0000000000000000 |
| # MIXED2-NEXT: 5 .symtab 00000060 0000000000000000 |
| # MIXED2-NEXT: 6 .shstrtab 00000038 0000000000000000 |
| # MIXED2-NEXT: 7 .strtab 00000012 0000000000000000 |
| |
| # Check file pattern for kept sections. |
| # RUN: echo "SECTIONS { \ |
| # RUN: . = SIZEOF_HEADERS; \ |
| # RUN: .keep : { KEEP(*1.o(.keep)) } \ |
| # RUN: }" > %t.script |
| # RUN: ld.lld --gc-sections -o %t --script %t.script %t1.o %t.o |
| # RUN: llvm-objdump -s %t | FileCheck -check-prefix=FILEMATCH %s |
| # FILEMATCH: Contents of section .keep: |
| # FILEMATCH-NEXT: 00e8 41414141 AAAA |
| |
| .global _start |
| _start: |
| mov temp, %eax |
| |
| .section .keep, "a" |
| keep: |
| .long 1 |
| |
| .section .temp, "a" |
| temp: |
| .long 2 |
