lld/test/MachO/headerpad.s

   1 # REQUIRES: x86
   2
   3 ## NOTE: Here we check that the first non-header section -- __text -- appears
   4 ## *exactly* `-headerpad` bytes from the end of the header. ld64 actually
   5 ## starts laying out the non-header sections in the __TEXT segment from the end
   6 ## of the (page-aligned) segment rather than the front, so its binaries
   7 ## typically have more than `-headerpad` bytes of actual padding. `-headerpad`
   8 ## just enforces a lower bound. We should consider implementing the same
   9 ## alignment behavior.
  10
  11 # RUN: rm -rf %t; mkdir -p %t
  12
  13 ################ Check default behavior
  14 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %s -o %t/test.o
  15 # RUN: %lld -o %t/test %t/test.o
  16 # RUN: llvm-objdump --macho --all-headers %t/test | FileCheck %s --check-prefix=PADx
  17 #
  18 # PADx:      magic        {{.+}}  ncmds  sizeofcmds         flags
  19 # PADx-NEXT: MH_MAGIC_64  {{.+}}  [[#]]  [[#%u, CMDSIZE:]]  {{.*}}
  20 # PADx:      sectname __text
  21 # PADx-NEXT: segname __TEXT
  22 # PADx-NEXT: addr
  23 # PADx-NEXT: size
  24 # PADx-NEXT: offset [[#%u, CMDSIZE + 0x20 + 0x20]]
  25
  26 ################ Zero pad, no LCDylibs
  27 # RUN: %no-lsystem-lld -o %t/test %t/test.o -headerpad 0
  28 # RUN: llvm-objdump --macho --all-headers %t/test | FileCheck %s --check-prefix=PAD0
  29 # RUN: %no-lsystem-lld -o %t/test %t/test.o -headerpad 0 -headerpad_max_install_names
  30 # RUN: llvm-objdump --macho --all-headers %t/test | FileCheck %s --check-prefix=PAD0
  31 #
  32 # PAD0:      magic        {{.+}}  ncmds  sizeofcmds         flags
  33 # PAD0-NEXT: MH_MAGIC_64  {{.+}}  [[#]]  [[#%u, CMDSIZE:]]  {{.*}}
  34 # PAD0:      sectname __text
  35 # PAD0-NEXT: segname __TEXT
  36 # PAD0-NEXT: addr
  37 # PAD0-NEXT: size
  38 # PAD0-NEXT: offset [[#%u, CMDSIZE + 0x20 + 0]]
  39
  40 ################ Each lexical form of a hex number, no LCDylibs
  41 # RUN: %no-lsystem-lld -o %t/test %t/test.o -headerpad 11
  42 # RUN: llvm-objdump --macho --all-headers %t/test | FileCheck %s --check-prefix=PAD11
  43 # RUN: %no-lsystem-lld -o %t/test %t/test.o -headerpad 0x11
  44 # RUN: llvm-objdump --macho --all-headers %t/test | FileCheck %s --check-prefix=PAD11
  45 # RUN: %no-lsystem-lld -o %t/test %t/test.o -headerpad 0X11 -headerpad_max_install_names
  46 # RUN: llvm-objdump --macho --all-headers %t/test | FileCheck %s --check-prefix=PAD11
  47 #
  48 # PAD11:      magic        {{.+}}  ncmds  sizeofcmds         flags
  49 # PAD11-NEXT: MH_MAGIC_64  {{.+}}  [[#]]  [[#%u, CMDSIZE:]]  {{.*}}
  50 # PAD11:      sectname __text
  51 # PAD11-NEXT: segname __TEXT
  52 # PAD11-NEXT: addr
  53 # PAD11-NEXT: size
  54 # PAD11-NEXT: offset [[#%u, CMDSIZE + 0x20 + 0x11]]
  55
  56 ################ Each & all 3 kinds of LCDylib
  57 # RUN: echo "" | llvm-mc -filetype=obj -triple=x86_64-apple-darwin -o %t/null.o
  58 # RUN: %lld -o %t/libnull.dylib %t/null.o -dylib \
  59 # RUN:     -headerpad_max_install_names
  60 # RUN: llvm-objdump --macho --all-headers %t/libnull.dylib | FileCheck %s --check-prefix=PADMAX
  61 # RUN: %lld -o %t/libnull.dylib %t/null.o -dylib \
  62 # RUN:     -headerpad_max_install_names -lSystem
  63 # RUN: llvm-objdump --macho --all-headers %t/libnull.dylib | FileCheck %s --check-prefix=PADMAX
  64 # RUN: %lld -o %t/libnull.dylib %t/null.o -dylib \
  65 # RUN:     -headerpad_max_install_names \
  66 # RUN:     -lSystem -sub_library libSystem
  67 # RUN: llvm-objdump --macho --all-headers %t/libnull.dylib | FileCheck %s --check-prefix=PADMAX
  68 #
  69 # PADMAX:      magic        {{.+}}  ncmds        sizeofcmds         flags
  70 # PADMAX-NEXT: MH_MAGIC_64  {{.+}}  [[#%u, N:]]  [[#%u, CMDSIZE:]]  {{.*}}
  71 # PADMAX:      sectname __text
  72 # PADMAX-NEXT: segname __TEXT
  73 # PADMAX-NEXT: addr
  74 # PADMAX-NEXT: size
  75 # PADMAX-NEXT: offset [[#%u, CMDSIZE + 0x20 + mul(0x400, N - 9)]]
  76
  77 ################ All 3 kinds of LCDylib swamped by a larger override
  78 # RUN: %lld -o %t/libnull.dylib %t/null.o -dylib \
  79 # RUN:     -headerpad_max_install_names -headerpad 0x1001 \
  80 # RUN:     -lSystem -sub_library libSystem
  81 # RUN: llvm-objdump --macho --all-headers %t/libnull.dylib | FileCheck %s --check-prefix=PADOVR
  82 #
  83 # PADOVR:      magic        {{.+}}  ncmds        sizeofcmds         flags
  84 # PADOVR-NEXT: MH_MAGIC_64  {{.+}}  [[#%u, N:]]  [[#%u, CMDSIZE:]]  {{.*}}
  85 # PADOVR:      sectname __text
  86 # PADOVR-NEXT: segname __TEXT
  87 # PADOVR-NEXT: addr
  88 # PADOVR-NEXT: size
  89 # PADOVR-NEXT: offset [[#%u, CMDSIZE + 0x20 + 0x1001]]
  90
  91 .globl _main
  92 _main:
  93   ret