@ 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 subtract 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 3F009B00 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 7F409B00 |.....@.......@..|
@ CHECK: 0010: 00000000 7F409B01 B0B0B07F |.....@......|
@ CHECK: )
@ CHECK: }
Codebase Browser
llvm