llvm/test/MC/COFF/symbol-fragment-offset.s
Saleem Abdulrasool a51acc7631 MC: prevent early DCE of empty sections
Prevent the early elimination of sections in the object writer.  There may be
references to the section itself by other symbols, which may potentially not be
possible to resolve.  ML (Visual Studio's Macro Assembler) also seems to retain
empty sections.

The elimination of symbols and sections which are unused should really occur at
the link phase.  This will not cause any change in the resulting binary, simply
in the generated object files.

The adjustments to the other unit tests account for the fluctuating section
index caused by the appearance of sections which were previously discarded.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210373 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 21:40:16 +00:00

169 lines
5.8 KiB
ArmAsm

// The purpose of this test is to see if the COFF object writer is emitting the
// proper relocations for multiple pieces of data in a single data fragment.
// RUN: llvm-mc -filetype=obj -triple i686-pc-win32 %s | llvm-readobj -h -s -sr -sd -t | FileCheck %s
.def _main;
.scl 2;
.type 32;
.endef
.text
.globl _main
.align 16, 0x90
_main: # @main
# BB#0: # %entry
subl $4, %esp
movl $L_.str0, (%esp)
calll _printf
movl $L_.str1, (%esp)
calll _puts
movl $L_.str2, (%esp)
calll _puts
xorl %eax, %eax
addl $4, %esp
ret
.data
L_.str0: # @.str0
.asciz "Hello "
L_.str1: # @.str1
.asciz "World!"
.align 16 # @.str2
L_.str2:
.asciz "I'm The Last Line."
// CHECK: {
// CHECK: Machine: IMAGE_FILE_MACHINE_I386 (0x14C)
// CHECK: SectionCount: 3
// CHECK: TimeDateStamp: {{[0-9]+}}
// CHECK: PointerToSymbolTable: 0x{{[0-9A-F]+}}
// CHECK: SymbolCount: 9
// CHECK: OptionalHeaderSize: 0
// CHECK: Characteristics [ (0x0)
// CHECK: ]
// CHECK: }
// CHECK: Sections [
// CHECK: Section {
// CHECK: Number: 1
// CHECK: Name: .text
// CHECK: VirtualSize: 0
// CHECK: VirtualAddress: 0
// CHECK: RawDataSize: {{[0-9]+}}
// CHECK: PointerToRawData: 0x{{[0-9A-F]+}}
// CHECK: PointerToRelocations: 0x{{[0-9A-F]+}}
// CHECK: PointerToLineNumbers: 0x0
// CHECK: RelocationCount: 6
// CHECK: LineNumberCount: 0
// CHECK: Characteristics [ (0x60500020)
// CHECK: IMAGE_SCN_ALIGN_16BYTES
// CHECK: IMAGE_SCN_CNT_CODE
// CHECK: IMAGE_SCN_MEM_EXECUTE
// CHECK: IMAGE_SCN_MEM_READ
// CHECK: ]
// CHECK: Relocations [
// CHECK: 0x6 IMAGE_REL_I386_DIR32 .data
// CHECK: 0xB IMAGE_REL_I386_REL32 _printf
// CHECK: 0x12 IMAGE_REL_I386_DIR32 .data
// CHECK: 0x17 IMAGE_REL_I386_REL32 _puts
// CHECK: 0x1E IMAGE_REL_I386_DIR32 .data
// CHECK: 0x23 IMAGE_REL_I386_REL32 _puts
// CHECK: ]
// CHECK: SectionData (
// CHECK: 0000: 83EC04C7 04240000 0000E800 000000C7 |.....$..........|
// CHECK: 0010: 04240700 0000E800 000000C7 04241000 |.$...........$..|
// CHECK: 0020: 0000E800 00000031 C083C404 C3 |.......1.....|
// CHECK: )
// CHECK: }
// CHECK: Section {
// CHECK: Number: 2
// CHECK: Name: .data
// CHECK: VirtualSize: 0
// CHECK: VirtualAddress: 0
// CHECK: RawDataSize: {{[0-9]+}}
// CHECK: PointerToRawData: 0x{{[0-9A-F]+}}
// CHECK: PointerToRelocations: 0x0
// CHECK: PointerToLineNumbers: 0x0
// CHECK: RelocationCount: 0
// CHECK: LineNumberCount: 0
// CHECK: Characteristics [ (0xC0500040)
// CHECK: IMAGE_SCN_ALIGN_16BYTES
// CHECK: IMAGE_SCN_CNT_INITIALIZED_DATA
// CHECK: IMAGE_SCN_MEM_READ
// CHECK: IMAGE_SCN_MEM_WRITE
// CHECK: Relocations [
// CHECK: ]
// CHECK: SectionData (
// CHECK: 0000: 48656C6C 6F200057 6F726C64 21000000 |Hello .World!...|
// CHECK: 0010: 49276D20 54686520 4C617374 204C696E |I'm The Last Lin|
// CHECK: 0020: 652E00 |e..|
// CHECK: )
// CHECK: }
// CHECK: ]
// CHECK: Symbols [
// CHECK: Symbol {
// CHECK: Name: .text
// CHECK: Value: 0
// CHECK: Section: .text
// CHECK: BaseType: Null
// CHECK: ComplexType: Null
// CHECK: StorageClass: Static
// CHECK: AuxSymbolCount: 1
// CHECK: AuxSectionDef {
// CHECK: Length: 45
// CHECK: RelocationCount: 6
// CHECK: LineNumberCount: 0
// CHECK: Checksum: 0x0
// CHECK: Number: 1
// CHECK: Selection: 0x0
// CHECK: Unused: (00 00 00)
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: .data
// CHECK: Value: 0
// CHECK: Section: .data
// CHECK: BaseType: Null
// CHECK: ComplexType: Null
// CHECK: StorageClass: Static
// CHECK: AuxSymbolCount: 1
// CHECK: AuxSectionDef {
// CHECK: Length: 35
// CHECK: RelocationCount: 0
// CHECK: LineNumberCount: 0
// CHECK: Checksum: 0x0
// CHECK: Number: 2
// CHECK: Selection: 0x0
// CHECK: Unused: (00 00 00)
// CHECK: }
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: _main
// CHECK: Value: 0
// CHECK: Section: .text
// CHECK: BaseType: Null
// CHECK: ComplexType: Function
// CHECK: StorageClass: External
// CHECK: AuxSymbolCount: 0
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: _printf
// CHECK: Value: 0
// CHECK: Section: (0)
// CHECK: BaseType: Null
// CHECK: ComplexType: Null
// CHECK: StorageClass: External
// CHECK: AuxSymbolCount: 0
// CHECK: }
// CHECK: Symbol {
// CHECK: Name: _puts
// CHECK: Value: 0
// CHECK: Section: (0)
// CHECK: BaseType: Null
// CHECK: ComplexType: Null
// CHECK: StorageClass: External
// CHECK: AuxSymbolCount: 0
// CHECK: }
// CHECK: ]