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Add longjmp support for Thumb-2

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When a Thumb-2 kernel is being used, then longjmp must be implemented
using the Thumb-2 instruction set in module/lua/setjmp/setjmp_arm.S.

Original-patch-by: @jsrlabs
Reviewed-by: @awehrfritz
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7408 
Closes #9957 
Closes #9967
This commit is contained in:
Brian Behlendorf 2020-04-29 17:30:13 -07:00 committed by Tony Hutter
parent 6b18d7df37
commit 4f5dcc9dc1
1 changed files with 18 additions and 1 deletions
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19
module/lua/setjmp/setjmp_arm.S
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@ -31,12 +31,19 @@
#if defined(__arm__) && !defined(__aarch64__) #if defined(__arm__) && !defined(__aarch64__)
#if defined(__thumb2__)
#define _FUNC_MODE .code 16; .thumb_func
#else
#define _FUNC_MODE .code 32
#endif
#define ENTRY(x) \ #define ENTRY(x) \
.text; \ .text; \
.syntax unified; \
.align 2; \ .align 2; \
.global x; \ .global x; \
.type x,#function; \ .type x,#function; \
.code 32; \ _FUNC_MODE; \
x: x:
#define END(x) \ #define END(x) \
@ -49,13 +56,23 @@ x:
* setjump + longjmp * setjump + longjmp
*/ */
ENTRY(setjmp) ENTRY(setjmp)
#if defined(__thumb2__)
mov ip, sp
stmia r0, {r4-r12,r14}
#else
stmia r0, {r4-r14} stmia r0, {r4-r14}
#endif
mov r0, #0x00000000 mov r0, #0x00000000
RET RET
END(setjmp) END(setjmp)
ENTRY(longjmp) ENTRY(longjmp)
#if defined(__thumb2__)
ldmia r0, {r4-r12,r14}
mov sp, ip
#else
ldmia r0, {r4-r14} ldmia r0, {r4-r14}
#endif
mov r0, #0x00000001 mov r0, #0x00000001
RET RET
END(longjmp) END(longjmp)