fix powerpc asm not to store data in volatile space below stack pointer

[musl] / src / signal / powerpc / sigsetjmp.s

diff --git a/src/signal/powerpc/sigsetjmp.s b/src/signal/powerpc/sigsetjmp.s
index 0b79dcc..deed732 100644 (file)
--- a/src/signal/powerpc/sigsetjmp.s
+++ b/src/signal/powerpc/sigsetjmp.s
@@ -1,5 +1,5 @@
-        .global sigsetjmp
-        .type sigsetjmp,%function
+       .global sigsetjmp
+       .type sigsetjmp,%function
 sigsetjmp:
        #int sigsetjmp(sigjmp_buf buf, int save)
        #               r3              r4
@@ -10,25 +10,25 @@ 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);
+       # increase stack frame by 16
+       subi 1, 1, 16
        # thus store r3 on the stack, to restore it later
-       stw 3, -4(1)
+       stw 3, 12(1)
        # store old link reg
        mflr 0
-       stw 0, -8(1)
-       # increase stack frame by 16
-       subi 1, 1, 16
+       stw 0, 8(1)
        # 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)
+       lwz 3, 12(1)
        #restore link reg
-       lwz 0, -8(1)
+       lwz 0, 8(1)
        mtlr 0
+       #restore sp
+       addi 1, 1, 16
 1:
        b setjmp