Attempt to resolve sporadic SEGV crashes in bn_sub_words in OpenSSH. I'm
baffled why it crashes and does it sporadically...
diff --git a/crypto/bn/asm/sparcv8plus.S b/crypto/bn/asm/sparcv8plus.S
index 0074dfd..8992928 100644
--- a/crypto/bn/asm/sparcv8plus.S
+++ b/crypto/bn/asm/sparcv8plus.S
@@ -445,6 +445,7 @@
* int n;
*/
bn_add_words:
+ sra %o3,%g0,%o3 ! signx %o3
brgz,a %o3,.L_bn_add_words_proceed
lduw [%o1],%o4
retl
@@ -454,7 +455,6 @@
andcc %o3,-4,%g0
bz,pn %icc,.L_bn_add_words_tail
addcc %g0,0,%g0 ! clear carry flag
- nop
.L_bn_add_words_loop: ! wow! 32 aligned!
dec 4,%o3
@@ -523,6 +523,7 @@
* int n;
*/
bn_sub_words:
+ sra %o3,%g0,%o3 ! signx %o3
brgz,a %o3,.L_bn_sub_words_proceed
lduw [%o1],%o4
retl
@@ -532,7 +533,6 @@
andcc %o3,-4,%g0
bz,pn %icc,.L_bn_sub_words_tail
addcc %g0,0,%g0 ! clear carry flag
- nop
.L_bn_sub_words_loop: ! wow! 32 aligned!
dec 4,%o3
