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Set md_regs before call the alternate syscall handler.

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Remove the EMUL_HAS_SYS___syscall test, because the handler is no longer shared
with SVR4.
Rather than comparing with e_nsysent, just mask the value.  This is only done
to protect us from malicious programs anyway.
This commit is contained in:
mycroft 2000-12-09 06:33:15 +00:00
parent 3340782619
commit afc49e36eb
1 changed files with 6 additions and 10 deletions
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12
sys/arch/i386/i386/trap.c
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@ -1,4 +1,4 @@
/* $NetBSD: trap.c,v 1.147 2000/12/09 02:46:17 mycroft Exp $ */
/* $NetBSD: trap.c,v 1.148 2000/12/09 06:33:15 mycroft Exp $ */
/*-
* Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
@ -588,13 +588,14 @@ syscall(frame)
#endif
p = curproc;
p->p_md.md_regs = &frame;
if (p->p_emul->e_syscall) {
p->p_emul->e_syscall(&frame);
return;
}
sticks = p->p_sticks;
p->p_md.md_regs = &frame;
code = frame.tf_eax;
callp = p->p_emul->e_sysent;
@ -625,18 +626,13 @@ syscall(frame)
* Like syscall, but code is a quad, so as to maintain
* quad alignment for the rest of the arguments.
*/
if (p->p_emul->e_flags & EMUL_HAS_SYS___syscall) {
code = fuword(params + _QUAD_LOWWORD * sizeof(int));
params += sizeof(quad_t);
}
break;
default:
break;
}
if ((u_int)code >= (u_int)p->p_emul->e_nsysent)
callp += p->p_emul->e_nosys; /* illegal */
else
callp += code;
callp += (code & (SYS_NSYSENT - 1));
argsize = callp->sy_argsize;
if (argsize) {
error = copyin(params, (caddr_t)args, argsize);