---

yaml --- r: 14455 b: refs/heads/master c: aa0eecb h: refs/heads/master i: 14453: 6fc0f99 14451: 724921b 14447: c1aedc4 v: v3
git-mirror · Nov 17, 2005 · 606c230 · 606c230
1 parent 57ebda1
commit 606c230
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Showing 3 changed files with 4 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 75be99a8c597aaebf82802109cdfd1249eea951e
+refs/heads/master: aa0eecb07f27bea25a7cbe4150822be72493e574
diff --git a/trunk/arch/parisc/kernel/entry.S b/trunk/arch/parisc/kernel/entry.S
@@ -1846,6 +1846,7 @@ sys_clone_wrapper:
 	ldo	-16(%r30),%r29		/* Reference param save area */
 #endif
 
+	/* WARNING - Clobbers r19 and r21, userspace must save these! */
 	STREG	%r2,PT_GR19(%r1)	/* save for child */
 	STREG	%r30,PT_GR21(%r1)
 	BL	sys_clone,%r2

diff --git a/trunk/arch/parisc/kernel/syscall.S b/trunk/arch/parisc/kernel/syscall.S
@@ -164,7 +164,7 @@ linux_gateway_entry:
 #endif
 	STREG	%r2,  TASK_PT_GR30(%r1)		/* ... and save it */
 
-	STREG	%r20, TASK_PT_GR20(%r1)
+	STREG	%r20, TASK_PT_GR20(%r1)		/* Syscall number */
 	STREG	%r21, TASK_PT_GR21(%r1)
 	STREG	%r22, TASK_PT_GR22(%r1)
 	STREG	%r23, TASK_PT_GR23(%r1)		/* 4th argument */
@@ -527,6 +527,7 @@ lws_compare_and_swap:
 		We *must* giveup this call and fail.
 	*/
 	ldw	4(%sr2,%r20), %r28			/* Load thread register */
+	/* WARNING: If cr27 cycles to the same value we have problems */
 	mfctl	%cr27, %r21				/* Get current thread register */
 	cmpb,<>,n	%r21, %r28, cas_lock		/* Called recursive? */
 	b	lws_exit				/* Return error! */