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sigreturn doesn't take arguments. Instead, find out where the signal

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frame is from the stack pointer in the frame frame.

Also, don't forget to copy %rip back in.
This commit is contained in:
fvdl 2005-05-22 19:31:15 +00:00
parent e83accc0f6
commit 57409f3466
1 changed files with 15 additions and 20 deletions
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35
sys/compat/linux/arch/amd64/linux_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: linux_machdep.c,v 1.5 2005/05/22 14:52:12 fvdl Exp $ */
/* $NetBSD: linux_machdep.c,v 1.6 2005/05/22 19:31:15 fvdl Exp $ */
/*-
* Copyright (c) 2005 Emmanuel Dreyfus, all rights reserved.
@ -33,7 +33,7 @@
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_machdep.c,v 1.5 2005/05/22 14:52:12 fvdl Exp $");
__KERNEL_RCSID(0, "$NetBSD: linux_machdep.c,v 1.6 2005/05/22 19:31:15 fvdl Exp $");
#include <sys/param.h>
#include <sys/types.h>
@ -222,6 +222,7 @@ linux_sendsig(ksi, mask)
sigframe.uc.luc_mcontext.rdx = tf->tf_rdx;
sigframe.uc.luc_mcontext.rcx = tf->tf_rcx;
sigframe.uc.luc_mcontext.rsp = tf->tf_rsp;
sigframe.uc.luc_mcontext.rip = tf->tf_rip;
sigframe.uc.luc_mcontext.eflags = tf->tf_rflags;
sigframe.uc.luc_mcontext.cs = tf->tf_cs;
sigframe.uc.luc_mcontext.gs = tf->tf_gs;
@ -276,13 +277,7 @@ linux_sendsig(ksi, mask)
return;
}
/*
* Setup registers
* XXX for an unknown reason, the stack is shifted of 24 bytes
* when the signal handler is called. The +24 below is a dirty
* workaround, and the real problem should be fixed.
*/
linux_buildcontext(l, catcher, sp + 24);
linux_buildcontext(l, catcher, sp);
tf->tf_rdi = sigframe.info.lsi_signo;
tf->tf_rax = 0;
tf->tf_rsi = (long)&sfp->info;
@ -346,23 +341,23 @@ linux_sys_rt_sigreturn(l, v, retval)
void *v;
register_t *retval;
{
struct linux_sys_rt_sigreturn_args /* {
syscallarg(struct linux_ucontext *) ucp;
} */ *uap = v;
struct linux_ucontext luctx;
struct linux_ucontext *luctx;
struct trapframe *tf = l->l_md.md_regs;
struct linux_sigcontext *lsigctx;
struct linux__fpstate fpstate;
struct linux_rt_sigframe frame, *fp;
ucontext_t uctx;
mcontext_t *mctx;
struct fxsave64 *fxsave;
int error;
if ((error = copyin(SCARG(uap, ucp), &luctx, sizeof(luctx))) != 0) {
fp = (struct linux_rt_sigframe *)(tf->tf_rsp - 8);
if ((error = copyin(fp, &frame, sizeof(frame))) != 0) {
sigexit(l, SIGILL);
return error;
}
lsigctx = &luctx.luc_mcontext;
luctx = &frame.uc;
lsigctx = &luctx->luc_mcontext;
bzero(&uctx, sizeof(uctx));
mctx = (mcontext_t *)&uctx.uc_mcontext;
@ -380,7 +375,7 @@ linux_sys_rt_sigreturn(l, v, retval)
/*
* Signal set
*/
linux_to_native_sigset(&uctx.uc_sigmask, &luctx.luc_sigmask);
linux_to_native_sigset(&uctx.uc_sigmask, &luctx->luc_sigmask);
/*
* CPU state
@ -440,14 +435,14 @@ linux_sys_rt_sigreturn(l, v, retval)
* And the stack
*/
uctx.uc_stack.ss_flags = 0;
if (luctx.luc_stack.ss_flags & LINUX_SS_ONSTACK);
if (luctx->luc_stack.ss_flags & LINUX_SS_ONSTACK);
uctx.uc_stack.ss_flags = SS_ONSTACK;
if (luctx.luc_stack.ss_flags & LINUX_SS_DISABLE);
if (luctx->luc_stack.ss_flags & LINUX_SS_DISABLE);
uctx.uc_stack.ss_flags = SS_DISABLE;
uctx.uc_stack.ss_sp = luctx.luc_stack.ss_sp;
uctx.uc_stack.ss_size = luctx.luc_stack.ss_size;
uctx.uc_stack.ss_sp = luctx->luc_stack.ss_sp;
uctx.uc_stack.ss_size = luctx->luc_stack.ss_size;
/*
* And let setucontext deal with that.