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arm: Validate IT[7:0] bit field of PSR

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Update #3093.
This commit is contained in:
Sebastian Huber
2017-08-10 07:51:17 +02:00
parent ca9490ca36
commit a95d909878
1 changed files with 25 additions and 1 deletions
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26
cpukit/score/cpu/arm/arm-context-validate.S
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@@ -44,6 +44,7 @@
#define FRAME_SIZE (FRAME_OFFSET_LR + 4) #define FRAME_SIZE (FRAME_OFFSET_LR + 4)
#endif #endif
.syntax unified
.section .text .section .text
#ifdef __thumb__ #ifdef __thumb__
@@ -174,11 +175,34 @@ check:
bne restore bne restore
.endm .endm
cmp r2, sp /* A compare involving the stack pointer is deprecated */
mov r1, sp
cmp r2, r1
bne restore bne restore
mov r1, r0 mov r1, r0
#ifdef __thumb2__
cmp r1, r1
itttt eq
addeq r1, #1
addeq r1, #2
addeq r1, #4
addeq r1, #8
subs r1, #15
cmp r1, r0
bne restore
cmp r1, r1
iteee eq
addeq r1, #1
addne r1, #2
addne r1, #4
addne r1, #8
subs r1, #1
cmp r1, r0
bne restore
#endif
#ifndef ARM_MULTILIB_VFP #ifndef ARM_MULTILIB_VFP
check_register r3 check_register r3
#endif #endif