diff options
Diffstat (limited to 'sys/arch/sparc')
| -rw-r--r-- | sys/arch/sparc/sparc/locore.s | 40 |
1 files changed, 32 insertions, 8 deletions
diff --git a/sys/arch/sparc/sparc/locore.s b/sys/arch/sparc/sparc/locore.s index 6c56acd8b8e..a7f663c79af 100644 --- a/sys/arch/sparc/sparc/locore.s +++ b/sys/arch/sparc/sparc/locore.s @@ -1,4 +1,4 @@ -/* $OpenBSD: locore.s,v 1.43 2001/12/07 19:57:08 deraadt Exp $ */ +/* $OpenBSD: locore.s,v 1.44 2002/01/23 20:06:38 miod Exp $ */ /* $NetBSD: locore.s,v 1.73 1997/09/13 20:36:48 pk Exp $ */ /* @@ -4042,12 +4042,12 @@ ENTRY(copyinstr) ! %o0 = fromaddr, %o1 = toaddr, %o2 = maxlen, %o3 = &lencopied mov %o1, %o5 ! save = toaddr; tst %o2 ! maxlen == 0? - beq,a Lcstoolong ! yes, return ENAMETOOLONG + beq,a Lcstoolong0 ! yes, return ENAMETOOLONG sethi %hi(_cpcb), %o4 set KERNBASE, %o4 cmp %o0, %o4 ! fromaddr < KERNBASE? - blu Lcsdocopy ! yes, go do it + blu Lcsdocopyi ! yes, go do it sethi %hi(_cpcb), %o4 ! (first instr of copy) b Lcsdone ! no, return EFAULT @@ -4063,21 +4063,28 @@ ENTRY(copyoutstr) ! %o0 = fromaddr, %o1 = toaddr, %o2 = maxlen, %o3 = &lencopied mov %o1, %o5 ! save = toaddr; tst %o2 ! maxlen == 0? - beq,a Lcstoolong ! yes, return ENAMETOOLONG + beq,a Lcstoolong0 ! yes, return ENAMETOOLONG sethi %hi(_cpcb), %o4 set KERNBASE, %o4 cmp %o1, %o4 ! toaddr < KERNBASE? - blu Lcsdocopy ! yes, go do it + blu Lcsdocopyo ! yes, go do it sethi %hi(_cpcb), %o4 ! (first instr of copy) b Lcsdone ! no, return EFAULT mov EFAULT, %o0 -Lcsdocopy: +Lcsdocopyi: ! sethi %hi(_cpcb), %o4 ! (done earlier) ld [%o4 + %lo(_cpcb)], %o4 ! catch faults - set Lcsfault, %g1 + set Lcsfaulti, %g1 + b 0f + st %g1, [%o4 + PCB_ONFAULT] + +Lcsdocopyo: +! sethi %hi(_cpcb), %o4 ! (done earlier) + ld [%o4 + %lo(_cpcb)], %o4 ! catch faults + set Lcsfaulto, %g1 st %g1, [%o4 + PCB_ONFAULT] ! XXX should do this in bigger chunks when possible @@ -4092,6 +4099,9 @@ Lcsdocopy: inc %o0 ! goto loop; ! } Lcstoolong: ! + deccc %o1 + stb %g0, [%o1] ! *--toaddr = '\0'; +Lcstoolong0: ! b Lcsdone ! error = ENAMETOOLONG; mov ENAMETOOLONG, %o0 ! goto done; 1: ! ok: @@ -4105,7 +4115,21 @@ Lcsdone: ! done: retl ! cpcb->pcb_onfault = 0; st %g0, [%o4 + PCB_ONFAULT]! return (error); -Lcsfault: +Lcsfaulti: + cmp %o1, %o5 ! did we write to the string? + be,a 1f + deccc %o1 +1: + stb %g0, [%o1] ! *--toaddr = '\0'; + b Lcsdone ! error = EFAULT; + mov EFAULT, %o0 ! goto ret; + +Lcsfaulto: + cmp %o1, %o5 ! did we write to the string? + be,a 1f + deccc %o1 + stb %g0, [%o1] ! *--toaddr = '\0'; +1: b Lcsdone ! error = EFAULT; mov EFAULT, %o0 ! goto ret; |