| @ 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: } |