# REQUIRES: x86 ## Test the placement of .lrodata, .lbss, .ldata, and their -fdata-sections variants. ## See also section-layout.s. # RUN: rm -rf %t && split-file %s %t && cd %t # RUN: llvm-mc -filetype=obj -triple=x86_64 --defsym=BSS=1 a.s -o a.o # RUN: ld.lld --section-start=.note=0x200300 a.o -o a # RUN: llvm-readelf -S -l a | FileCheck %s # RUN: llvm-mc -filetype=obj -triple=x86_64 a.s -o a1.o # RUN: ld.lld --section-start=.note=0x200300 a1.o -o a1 # RUN: llvm-readelf -S a1 | FileCheck %s --check-prefix=CHECK1 # RUN: ld.lld -T b.lds -z norelro a.o -o b # RUN: llvm-readelf -S -l b | FileCheck %s --check-prefix=CHECK2 # CHECK: Name Type Address Off Size ES Flg Lk Inf Al # CHECK-NEXT: NULL 0000000000000000 000000 000000 00 0 0 0 # CHECK-NEXT: .note NOTE 0000000000200300 000300 000001 00 A 0 0 1 # CHECK-NEXT: .lrodata PROGBITS 0000000000200301 000301 000002 00 Al 0 0 1 # CHECK-NEXT: .rodata PROGBITS 0000000000200303 000303 000001 00 A 0 0 1 # CHECK-NEXT: .text PROGBITS 0000000000201304 000304 000001 00 AX 0 0 4 # CHECK-NEXT: .tdata PROGBITS 0000000000202305 000305 000001 00 WAT 0 0 1 # CHECK-NEXT: .tbss NOBITS 0000000000202306 000306 000002 00 WAT 0 0 1 # CHECK-NEXT: .relro_padding NOBITS 0000000000202306 000306 000cfa 00 WA 0 0 1 # CHECK-NEXT: .data PROGBITS 0000000000203306 000306 000001 00 WA 0 0 1 # CHECK-NEXT: .bss NOBITS 0000000000203307 000307 001800 00 WA 0 0 1 ## We spend size(.bss) % MAXPAGESIZE bytes for .bss. # CHECK-NEXT: .ldata PROGBITS 0000000000205b07 000b07 000002 00 WAl 0 0 1 # CHECK-NEXT: .ldata2 PROGBITS 0000000000205b09 000b09 000001 00 WAl 0 0 1 # CHECK-NEXT: .lbss NOBITS 0000000000205b0a 000b0a 000002 00 WAl 0 0 1 # CHECK-NEXT: .comment PROGBITS 0000000000000000 000b0a {{.*}} 01 MS 0 0 1 # CHECK: Program Headers: # CHECK-NEXT: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align # CHECK-NEXT: PHDR 0x000040 0x0000000000200040 0x0000000000200040 {{.*}} {{.*}} R 0x8 # CHECK-NEXT: LOAD 0x000000 0x0000000000200000 0x0000000000200000 0x000304 0x000304 R 0x1000 # CHECK-NEXT: LOAD 0x000304 0x0000000000201304 0x0000000000201304 0x000001 0x000001 R E 0x1000 # CHECK-NEXT: LOAD 0x000305 0x0000000000202305 0x0000000000202305 0x000001 0x000cfb RW 0x1000 # CHECK-NEXT: LOAD 0x000306 0x0000000000203306 0x0000000000203306 0x000001 0x001801 RW 0x1000 # CHECK-NEXT: LOAD 0x000b07 0x0000000000205b07 0x0000000000205b07 0x000003 0x000005 RW 0x1000 # CHECK1: .data PROGBITS 0000000000203306 000306 000001 00 WA 0 0 1 # CHECK1-NEXT: .ldata PROGBITS 0000000000203307 000307 000002 00 WAl 0 0 1 # CHECK1-NEXT: .ldata2 PROGBITS 0000000000203309 000309 000001 00 WAl 0 0 1 # CHECK1-NEXT: .comment PROGBITS 0000000000000000 00030a {{.*}} 01 MS 0 0 1 # CHECK2: .note NOTE 0000000000200300 000300 000001 00 A 0 0 1 # CHECK2-NEXT: .lrodata PROGBITS 0000000000200301 000301 000001 00 Al 0 0 1 ## With a SECTIONS command, we suppress the default rule placing .lrodata.* into .lrodata. # CHECK2-NEXT: .lrodata.1 PROGBITS 0000000000200302 000302 000001 00 Al 0 0 1 # CHECK2-NEXT: .rodata PROGBITS 0000000000200303 000303 000001 00 A 0 0 1 # CHECK2-NEXT: .text PROGBITS 0000000000200304 000304 000001 00 AX 0 0 4 # CHECK2-NEXT: .tdata PROGBITS 0000000000200305 000305 000001 00 WAT 0 0 1 # CHECK2-NEXT: .tbss NOBITS 0000000000200306 000306 000001 00 WAT 0 0 1 # CHECK2-NEXT: .tbss.1 NOBITS 0000000000200307 000306 000001 00 WAT 0 0 1 # CHECK2-NEXT: .data PROGBITS 0000000000200306 000306 000001 00 WA 0 0 1 # CHECK2-NEXT: .bss NOBITS 0000000000200307 000307 001800 00 WA 0 0 1 # CHECK2-NEXT: .ldata PROGBITS 0000000000201b07 001b07 000002 00 WAl 0 0 1 # CHECK2-NEXT: .ldata2 PROGBITS 0000000000201b09 001b09 000001 00 WAl 0 0 1 # CHECK2-NEXT: .lbss NOBITS 0000000000201b0a 001b0a 000002 00 WAl 0 0 1 # CHECK2-NEXT: .comment PROGBITS 0000000000000000 001b0a {{.*}} 01 MS 0 0 1 # CHECK2: Program Headers: # CHECK2-NEXT: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align # CHECK2-NEXT: PHDR 0x000040 0x0000000000200040 0x0000000000200040 {{.*}} {{.*}} R 0x8 # CHECK2-NEXT: LOAD 0x000000 0x0000000000200000 0x0000000000200000 0x000304 0x000304 R 0x1000 # CHECK2-NEXT: LOAD 0x000304 0x0000000000200304 0x0000000000200304 0x000001 0x000001 R E 0x1000 # CHECK2-NEXT: LOAD 0x000305 0x0000000000200305 0x0000000000200305 0x001805 0x001807 RW 0x1000 # CHECK2-NEXT: TLS 0x000305 0x0000000000200305 0x0000000000200305 0x000001 0x000003 R 0x1 #--- a.s .globl _start _start: ret .section .note,"a",@note; .space 1 .section .rodata,"a",@progbits; .space 1 .section .data,"aw",@progbits; .space 1 .ifdef BSS ## .bss is large than one MAXPAGESIZE to test file offsets. .section .bss,"aw",@nobits; .space 0x1800 .endif .section .tdata,"awT",@progbits; .space 1 .section .tbss,"awT",@nobits; .space 1 .section .tbss.1,"awT",@nobits; .space 1 .section .lrodata,"al"; .space 1 .section .lrodata.1,"al"; .space 1 .section .ldata,"awl"; .space 1 ## Input .ldata.rel.ro sections are placed in the output .ldata section. .section .ldata.rel.ro,"awl"; .space 1 .ifdef BSS .section .lbss,"awl",@nobits; .space 1 ## Input .lbss.rel.ro sections are placed in the output .lbss section. .section .lbss.rel.ro,"awl",@nobits; .space 1 .endif .section .ldata2,"awl"; .space 1 #--- b.lds SECTIONS { . = 0x200300; .rodata : {} .text : {} .data : {} .bss : {} .ldata : { *(.ldata .ldata.*) } .ldata2 : {} .lbss : { *(.lbss .lbss.*) } }