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checkasm: arm: report the first clobbered register in checkasm_checked_call

This commit is contained in:
Janne Grunau 2016-07-14 23:16:14 +02:00
parent a8fce24b9c
commit 71a0472114
1 changed files with 39 additions and 25 deletions
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64
tests/checkasm/arm/checkasm.S
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@ -33,8 +33,12 @@ const register_init, align=3
.quad 0x249214109d5d1c88
endconst
const error_message
.asciz "failed to preserve register"
const error_message_fpscr
.asciz "failed to preserve register FPSCR"
const error_message_gpr
.asciz "failed to preserve register r%d"
const error_message_vfp
.asciz "failed to preserve register d%d"
endconst
@ max number of args used by any asm function.
@ -79,39 +83,42 @@ function checkasm_checked_call_\variant, export=1
push {r0, r1}
movrel r12, register_init
mov r3, #0
.ifc \variant, vfp
.macro check_reg_vfp, dreg, inc=8
ldrd r0, r1, [r12], #\inc
vmov r2, lr, \dreg
eor r0, r0, r2
eor r1, r1, lr
orr r3, r3, r0
orr r3, r3, r1
.macro check_reg_vfp, dreg, offset
vldr d0, [r12, #8 * (\offset)]
veor d0, d0, \dreg
vmov r2, r3, d0
orrs r2, r2, r3
bne 4f
.endm
.irp n, 8, 9, 10, 11, 12, 13, 14
check_reg_vfp d\n
.irp n, 8, 9, 10, 11, 12, 13, 14, 15
@ keep track of the checked double/SIMD register
mov r1, #\n
check_reg_vfp d\n, \n-8
.endr
check_reg_vfp d15, -56
.purgem check_reg_vfp
fmrx r0, FPSCR
ldr r1, [sp, #8]
eor r0, r0, r1
ldr r3, [sp, #8]
eor r0, r0, r3
@ Ignore changes in the topmost 5 bits
lsl r0, r0, #5
orr r3, r3, r0
lsls r0, r0, #5
bne 3f
.endif
@ keep track of the checked GPR
mov r1, #4
.macro check_reg reg1, reg2=
ldrd r0, r1, [r12], #8
eor r0, r0, \reg1
orrs r3, r3, r0
ldrd r2, r3, [r12], #8
eors r2, r2, \reg1
bne 2f
add r1, r1, #1
.ifnb \reg2
eor r1, r1, \reg2
orrs r3, r3, r1
eors r3, r3, \reg2
bne 2f
.endif
add r1, r1, #1
.endm
check_reg r4, r5
check_reg r6, r7
@ -124,9 +131,16 @@ function checkasm_checked_call_\variant, export=1
check_reg r10, r11
.purgem check_reg
beq 0f
movrel r0, error_message
b 0f
4:
movrel r0, error_message_vfp
b 1f
3:
movrel r0, error_message_fpscr
b 1f
2:
movrel r0, error_message_gpr
1:
blx X(checkasm_fail_func)
0:
pop {r0, r1}