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fix powerpc setjmp/longjmp to save/restore float regs; enlarge/align jmp_buf
[musl]
/
src
/
signal
/
powerpc
/
sigsetjmp.s
diff --git
a/src/signal/powerpc/sigsetjmp.s
b/src/signal/powerpc/sigsetjmp.s
index
81f5a40
..
a23463d
100644
(file)
--- a/
src/signal/powerpc/sigsetjmp.s
+++ b/
src/signal/powerpc/sigsetjmp.s
@@
-10,25
+10,26
@@
sigsetjmp:
#2) if its 0, goto setjmp code
beq- cr7, 1f
#3) else: we must call pthread_sigmask(SIG_SETMASK, 0, (sigset_t *)buf->__ss);
#2) if its 0, goto setjmp code
beq- cr7, 1f
#3) else: we must call pthread_sigmask(SIG_SETMASK, 0, (sigset_t *)buf->__ss);
- #
thus store r3 on the stack, to restore it later
- stw 3
, -4(1
)
- # store old link reg
- mflr 0
- stw 0, -8(1)
- # increase stack frame by 16
- subi 1, 1, 16
+ #
store non-volatile regs 30, 31 into the setjmp buf
+ stw 3
0, 0(3
)
+ stw 31, 4(3)
+ # use them to store the pointer to the jmpbuf and the link reg
+ mr 30, 3
+ mflr 31
+
# put pointer to ss buf into r5 (3rd arg)
addi 5, 3, 260
# put "2" i.e. SIG_SETMASK in r3
li 3, 2
li 4, 0
bl pthread_sigmask
# put pointer to ss buf into r5 (3rd arg)
addi 5, 3, 260
# put "2" i.e. SIG_SETMASK in r3
li 3, 2
li 4, 0
bl pthread_sigmask
- #restore sp
- addi 1, 1, 16
- #restore r3
- lwz 3, -4(1)
- #restore link reg
- lwz 0, -8(1)
- mtlr 0
+
+ #restore jmpbuf pointer and link reg
+ mr 3, 30
+ mtlr 31
+ #resore non-volatile regs
+ lwz 30, 0(3)
+ lwz 31, 4(3)
+
1:
b setjmp
1:
b setjmp