powerpc: handle syscall error in clone.

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

diff --git a/src/signal/powerpc/sigsetjmp.s b/src/signal/powerpc/sigsetjmp.s
index deed732..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);
-       # increase stack frame by 16
-       subi 1, 1, 16
-       # thus store r3 on the stack, to restore it later
-       stw 3, 12(1)
-       # store old link reg
-       mflr 0
-       stw 0, 8(1)
+       # store non-volatile regs 30, 31 into the setjmp buf
+       stw 30, 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
-       #restore r3
-       lwz 3, 12(1)
-       #restore link reg
-       lwz 0, 8(1)
-       mtlr 0
-       #restore sp
-       addi 1, 1, 16
+       
+       #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