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llvm-project/llvm/test/MC/ARM/eh-directive-setfp.s

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Implement AsmParser for ARM unwind directives. This commit implements the AsmParser for fnstart, fnend, cantunwind, personality, handlerdata, pad, setfp, save, and vsave directives. This commit fixes some minor issue in the ARMELFStreamer: * The switch back to corresponding section after the .fnend directive. * Emit the unwind opcode while processing .fnend directive if there is no .handlerdata directive. * Emit the unwind opcode to .ARM.extab while processing .handlerdata even if .personality directive does not exist. llvm-svn: 181603
2013-05-11 00:17:24 +08:00
@ RUN: llvm-mc %s -triple=armv7-unknown-linux-gnueabi -filetype=obj -o - \
@ RUN: | llvm-readobj -s -sd | FileCheck %s
@ Check for .setfp directive.
@ The .setfp directive will track the offset between the frame pointer and
@ the stack pointer. This is required for the function that will change
@ the stack pointer out of the function prologue. If the exception is thrown,
@ then libunwind will reconstruct the stack pointer from the frame pointer.
@ The reconstruction code is implemented by two different unwind opcode:
@ (i) the unwind opcode to copy stack offset from the other register, and
@ (ii) the unwind opcode to add or substract the stack offset.
@
@ This file includes several cases separated by different range of -offset
@
@ (-offset) < 0x00
@ (-offset) == 0x00
@ 0x04 <= (-offset) <= 0x100
@ 0x104 <= (-offset) <= 0x200
@ 0x204 <= (-offset)
.syntax unified
@-------------------------------------------------------------------------------
@ TEST1
@-------------------------------------------------------------------------------
.section .TEST1
.globl func1
.align 2
.type func1,%function
.fnstart
func1:
.setfp fp, sp, #0
add fp, sp, #0
sub sp, fp, #0
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ The assembler should emit 0x9B to copy stack pointer from r11.
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST1
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 B0B09B00 |........|
@ CHECK: )
@ CHECK: }
@-------------------------------------------------------------------------------
@ TEST2
@-------------------------------------------------------------------------------
.section .TEST2
.globl func2a
.align 2
.type func2a,%function
.fnstart
func2a:
.setfp fp, sp, #-4
add fp, sp, #4
sub sp, fp, #4
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func2b
.align 2
.type func2b,%function
.fnstart
func2b:
.setfp fp, sp, #-0x100
add fp, sp, #0x100
sub sp, fp, #0x100
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ The assembler should emit 0x9B to copy stack pointer from r11.
@ The assembler should emit ((-offset - 4) >> 2) for offset.
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST2
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 B0009B00 00000000 B03F9B00 |.............?..|
@ CHECK: )
@ CHECK: }
@-------------------------------------------------------------------------------
@ TEST3
@-------------------------------------------------------------------------------
.section .TEST3
.globl func3a
.align 2
.type func3a,%function
.fnstart
func3a:
.setfp fp, sp, #-0x104
sub fp, sp, #0x104
add sp, fp, #0x104
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func3b
.align 2
.type func3b,%function
.fnstart
func3b:
.setfp fp, sp, #-0x200
sub fp, sp, #0x200
add sp, fp, #0x200
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ The assembler should emit 0x9B to copy stack pointer from r11.
@ The assembler should emit 0x3F and ((-offset - 0x104) >> 2) for offset.
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST3
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 003F9B00 00000000 3F3F9B00 |.....?......??..|
@ CHECK: )
@ CHECK: }
@-------------------------------------------------------------------------------
@ TEST4
@-------------------------------------------------------------------------------
.section .TEST4
.globl func4a
.align 2
.type func4a,%function
.fnstart
func4a:
.setfp fp, sp, #-0x204
sub fp, sp, #0x204
add sp, fp, #0x204
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func4b
.align 2
.type func4b,%function
.fnstart
func4b:
.setfp fp, sp, #-0x580
sub fp, sp, #0x580
add sp, fp, #0x580
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ The assembler should emit 0x9B to copy stack pointer from r11.
@ The assembler should emit 0xB2 and the ULEB128 encoding of
@ ((-offset - 0x204) >> 2) for offset.
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST4
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 00B29B00 00000000 DFB29B01 |................|
@ CHECK: 0010: B0B0B001 |....|
@ CHECK: )
@ CHECK: }
@-------------------------------------------------------------------------------
@ TEST5
@-------------------------------------------------------------------------------
.section .TEST5
.globl func5a
.align 2
.type func5a,%function
.fnstart
func5a:
.setfp fp, sp, #0x4
add fp, sp, #0x4
sub sp, fp, #0x4
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func5b
.align 2
.type func5b,%function
.fnstart
func5b:
.setfp fp, sp, #0x104
add fp, sp, #0x104
sub sp, fp, #0x104
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func5c
.align 2
.type func5c,%function
.fnstart
func5c:
.setfp fp, sp, #0x204
add fp, sp, #0x204
sub sp, fp, #0x204
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ The assembler should emit 0x9B to copy stack pointer from r11.
@ The assembler should emit (0x40 | (offset - 4)) >> 2 for offset.
@ If (offset - 4) is greater than 0x3f, then multiple 0x7f should be emitted.
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST5
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 B0409B00 00000000 407F9B00 |.....@......@...|
@ CHECK: 0010: 00000000 7F7F9B01 B0B0B040 |...........@|
@ CHECK: )
@ CHECK: }