From aa0eecb07f27bea25a7cbe4150822be72493e574 Mon Sep 17 00:00:00 2001 From: Carlos O'Donell Date: Thu, 17 Nov 2005 16:32:46 -0500 Subject: [PARISC] Document some register usages in assembly files Document clobbers and args in entry.S and syscall.S. entry.S: Add comment to indicate that cr27 may recycle and EDEADLOCK detection is not 100% correct. Since this is only enabled when using ENABLE_LWS_DEBUG, the user is warned by the comment. Signed-off-by: Carlos O'Donell Signed-off-by: Kyle McMartin --- arch/parisc/kernel/entry.S | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/parisc/kernel/entry.S') diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index c7e66ee5b083..9af4b22a6d77 100644 --- a/arch/parisc/kernel/entry.S +++ b/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 -- cgit v1.2.2