diff --git a/lld/test/ELF/many-sections-gc.s b/lld/test/ELF/many-sections-gc.s new file mode 100644 --- /dev/null +++ b/lld/test/ELF/many-sections-gc.s @@ -0,0 +1,154 @@ +# REQUIRES: x86 + +## Show that --gc-sections works when there are many sections, and that +## referenced common and absolute symbols in such cases are not removed, nor are +## they incorrectly attributed to the sections with index 0xFFF1 or 0xFFF2. + +# RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o %t.o +# RUN: ld.lld %t.o -o %t --gc-sections +# RUN: llvm-readobj --symbols --sections %t | FileCheck %s + +# CHECK: Sections [ +# CHECK-NEXT: Section { +# CHECK-NEXT: Index: 0 +# CHECK-NEXT: Name: (0) +# CHECK: Section { +# CHECK-NEXT: Index: 1 +# CHECK-NEXT: Name: .text +# CHECK: Section { +# CHECK-NEXT: Index: 2 +# CHECK-NEXT: Name: .bss +# CHECK: Section { +# CHECK-NEXT: Index: 3 +# CHECK-NEXT: Name: .comment +# CHECK: Section { +# CHECK-NEXT: Index: 4 +# CHECK-NEXT: Name: .symtab +# CHECK: Section { +# CHECK-NEXT: Index: 5 +# CHECK-NEXT: Name: .shstrtab +# CHECK: Section { +# CHECK-NEXT: Index: 6 +# CHECK-NEXT: Name: .strtab +# CHECK-NOT: Section { + +# CHECK: Symbols [ +# CHECK-NEXT: Symbol { +# CHECK-NEXT: Name: (0) +# CHECK: Symbol { +# CHECK-NEXT: Name: _start +# CHECK: Symbol { +# CHECK-NEXT: Name: abs +# CHECK: Symbol { +# CHECK-NEXT: Name: common +# CHECK-NOT: Symbol { + +.macro gen_sections4 x + .section a\x,"a" + .global sa\x + sa\x: + .byte 0 + .section b\x,"a" + .global sa\x + sb\x: + .byte 0 + .section c\x,"a" + .global sa\x + sc\x: + .byte 0 + .section d\x,"a" + .global sa\x + sd\x: + .byte 0 +.endm + +.macro gen_sections8 x + gen_sections4 a\x + gen_sections4 b\x +.endm + +.macro gen_sections16 x + gen_sections8 a\x + gen_sections8 b\x +.endm + +.macro gen_sections32 x + gen_sections16 a\x + gen_sections16 b\x +.endm + +.macro gen_sections64 x + gen_sections32 a\x + gen_sections32 b\x +.endm + +.macro gen_sections128 x + gen_sections64 a\x + gen_sections64 b\x +.endm + +.macro gen_sections256 x + gen_sections128 a\x + gen_sections128 b\x +.endm + +.macro gen_sections512 x + gen_sections256 a\x + gen_sections256 b\x +.endm + +.macro gen_sections1024 x + gen_sections512 a\x + gen_sections512 b\x +.endm + +.macro gen_sections2048 x + gen_sections1024 a\x + gen_sections1024 b\x +.endm + +.macro gen_sections4096 x + gen_sections2048 a\x + gen_sections2048 b\x +.endm + +.macro gen_sections8192 x + gen_sections4096 a\x + gen_sections4096 b\x +.endm + +.macro gen_sections16384 x + gen_sections8192 a\x + gen_sections8192 b\x +.endm + +.macro gen_sections32768 x + gen_sections16384 a\x + gen_sections16384 b\x +.endm + +gen_sections32768 a +gen_sections16384 b +gen_sections8192 c +gen_sections4096 d +gen_sections2048 e +gen_sections1024 f +gen_sections512 g +gen_sections128 h +gen_sections64 i +gen_sections32 j +gen_sections16 k +gen_sections8 l +gen_sections4 m + +.text + +.global abs +abs = 0x12345678 + +.comm common,4,4 + +.global _start +_start: + .quad abs + .quad common