mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
18cba562c8
Changes to ARM unwind opcode assembler:
* Fix multiple .save or .vsave directives. Besides, the
order is preserved now.
* For the directives which will generate multiple opcodes,
such as ".save {r0-r11}", the order of the unwind opcode
is fixed now, i.e. the registers with less encoding value
are popped first.
* Fix the $sp offset calculation. Now, we can use the
.setfp, .pad, .save, and .vsave directives at any order.
Changes to test cases:
* Add test cases to check the order of multiple opcodes
for the .save directive.
* Fix the incorrect $sp offset in the test case. The
stack pointer offset specified in the test case was
incorrect. (Changed test cases: ehabi-mc-section.ll and
ehabi-mc.ll)
* The opcode to restore $sp are slightly reordered. The
behavior are not changed, and the new output is same
as the output of GNU as. (Changed test cases:
eh-directive-pad.s and eh-directive-setfp.s)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183627 91177308-0d34-0410-b5e6-96231b3b80d8
240 lines
6.2 KiB
ArmAsm
240 lines
6.2 KiB
ArmAsm
@ 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 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: }
|