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Darwin skips the next instruction after a successful system call. Strange 

world.
This commit is contained in:
manu 2002-11-15 23:19:22 +00:00
parent b0fb4471b2
commit e7cfdc3995
1 changed files with 20 additions and 2 deletions
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22
sys/arch/powerpc/powerpc/syscall.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: syscall.c,v 1.14 2002/11/15 20:06:03 manu Exp $ */
/* $NetBSD: syscall.c,v 1.15 2002/11/15 23:19:22 manu Exp $ */
/*
* Copyright (C) 2002 Matt Thomas
@ -65,7 +65,7 @@
#define EMULNAME(x) (x)
#define EMULNAMEU(x) (x)
__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.14 2002/11/15 20:06:03 manu Exp $");
__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.15 2002/11/15 23:19:22 manu Exp $");
void
child_return(void *arg)
@ -173,6 +173,15 @@ EMULNAME(syscall_plain)(struct trapframe *frame)
frame->fixreg[FIRSTARG] = rval[0];
frame->fixreg[FIRSTARG + 1] = rval[1];
frame->cr &= ~0x10000000;
#ifdef COMPAT_MACH
/*
* For regular system calls, on success,
* the next instruction is skipped
*/
if ((frame->fixreg[0] < p->p_emul->e_nsysent)
&& (frame->fixreg[0] >= 0))
frame->srr0 += 4;
#endif /* COMPAT_MACH */
break;
case ERESTART:
/*
@ -270,6 +279,15 @@ EMULNAME(syscall_fancy)(struct trapframe *frame)
frame->fixreg[FIRSTARG] = rval[0];
frame->fixreg[FIRSTARG + 1] = rval[1];
frame->cr &= ~0x10000000;
#ifdef COMPAT_MACH
/*
* For regular system calls, on success,
* the next instruction is skipped
*/
if ((frame->fixreg[0] < p->p_emul->e_nsysent)
&& (frame->fixreg[0] >= 0))
frame->srr0 += 4;
#endif /* COMPAT_MACH */
break;
case ERESTART:
/*