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1# REQUIRES: x862# RUN: rm -rf %t; split-file %s %t3 4## Test that we correctly handle the sdata4 DWARF pointer encoding. llvm-mc's5## CFI directives always generate EH frames using the absptr (i.e. system6## pointer size) encoding, but it is possible to hand-roll your own EH frames7## that use the sdata4 encoding. For instance, libffi does this.8 9# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos10.15 %t/sdata4.s -o %t/sdata4.o10# RUN: %lld -lSystem %t/sdata4.o -o %t/sdata411# RUN: llvm-objdump --macho --syms --dwarf=frames %t/sdata4 | FileCheck %s12 13# CHECK: SYMBOL TABLE:14# CHECK: [[#%.16x,MAIN:]] g F __TEXT,__text _main15 16# CHECK: .eh_frame contents:17# CHECK: 00000000 00000010 00000000 CIE18# CHECK: Format: DWARF3219# CHECK: Version: 120# CHECK: Augmentation: "zR"21# CHECK: Code alignment factor: 122# CHECK: Data alignment factor: 123# CHECK: Return address column: 124# CHECK: Augmentation data: 1B25# CHECK: DW_CFA_def_cfa: reg7 +826# CHECK: CFA=reg7+827 28# CHECK: 00000014 00000010 00000018 FDE cie=00000000 pc=[[#%x,MAIN]]...[[#%x,MAIN+1]]29# CHECK: Format: DWARF3230# CHECK: DW_CFA_GNU_args_size: +1631# CHECK: DW_CFA_nop:32# CHECK: 0x[[#%x,MAIN]]: CFA=reg7+833 34#--- sdata4.s35.globl _main36_main:37 retq38LmainEnd:39 40.balign 441.section __TEXT,__eh_frame42# Although we don't reference this EhFrame symbol directly, we must have at43# least one non-local symbol in this section, otherwise llvm-mc generates bogus44# subtractor relocations.45EhFrame:46LCieHdr:47 .long LCieEnd - LCieStart48LCieStart:49 .long 0 # CIE ID50 .byte 1 # CIE version51 .ascii "zR\0"52 .byte 1 # Code alignment53 .byte 1 # Data alignment54 .byte 1 # RA column55 .byte 1 # Augmentation size56 .byte 0x1b # FDE pointer encoding (pcrel | sdata4)57 .byte 0xc, 7, 8 # DW_CFA_def_cfa reg7 +858 .balign 459LCieEnd:60 61LFdeHdr:62 .long LFdeEnd - LFdeStart63LFdeStart:64 .long LFdeStart - LCieHdr65 # The next two fields are longs instead of quads because of the sdata466 # encoding.67 .long _main - . # Function address68 .long LmainEnd - _main # Function length69 .byte 070 ## Insert DW_CFA_GNU_args_size to prevent ld64 from creating a compact unwind71 ## entry to replace this FDE. Makes it easier for us to cross-check behavior72 ## across the two linkers (LLD never bothers trying to synthesize compact73 ## unwind if it is not already present).74 .byte 0x2e, 0x10 # DW_CFA_GNU_args_size75 .balign 476LFdeEnd:77 78 .long 0 # terminator79 80.subsections_via_symbols 81