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[src/trunk]: src/sys/sys Fix the machine-dependent ptrace requests to respect...
details: https://anonhg.NetBSD.org/src/rev/c844a12355af
branches: trunk
changeset: 1015139:c844a12355af
user: mgorny <mgorny%NetBSD.org@localhost>
date: Thu Oct 15 17:37:35 2020 +0000
description:
Fix the machine-dependent ptrace requests to respect LWP number
Fix the machine-dependent ptrace register-related requests (e.g.
PT_GETXMMREGS, PT_GETXSTATE on x86) to correctly respect the LWP number
passed as the data argument. Before this change, these requests
did not operate on the requested LWP of a multithreaded program.
This change required moving ptrace_update_lwp() out of unit scope,
and changing ptrace_machdep_dorequest() function to take a pointer
to pointer as the second argument, consistently with ptrace_regs().
I am planning to extend the ATF ptrace() register tests in the future
to check for regressions in multithreaded programs, as time permits.
Reviewed by kamil.
diffstat:
sys/arch/amd64/amd64/process_machdep.c | 16 ++++++++++------
sys/arch/i386/i386/process_machdep.c | 18 +++++++++++-------
sys/arch/powerpc/include/ptrace.h | 4 ++--
sys/arch/powerpc/powerpc/process_machdep.c | 12 +++++++-----
sys/arch/sh3/include/ptrace.h | 4 ++--
sys/arch/sh3/sh3/process_machdep.c | 12 +++++++-----
sys/kern/sys_ptrace_common.c | 8 ++++----
sys/sys/ptrace.h | 5 +++--
8 files changed, 46 insertions(+), 33 deletions(-)
diffs (truncated from 318 to 300 lines):
diff -r 423fdd3e8c0a -r c844a12355af sys/arch/amd64/amd64/process_machdep.c
--- a/sys/arch/amd64/amd64/process_machdep.c Thu Oct 15 10:20:44 2020 +0000
+++ b/sys/arch/amd64/amd64/process_machdep.c Thu Oct 15 17:37:35 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: process_machdep.c,v 1.47 2019/11/27 09:16:58 rin Exp $ */
+/* $NetBSD: process_machdep.c,v 1.48 2020/10/15 17:37:35 mgorny Exp $ */
/*
* Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
@@ -74,7 +74,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.47 2019/11/27 09:16:58 rin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.48 2020/10/15 17:37:35 mgorny Exp $");
#include "opt_xen.h"
#include <sys/param.h>
@@ -307,7 +307,7 @@
int
ptrace_machdep_dorequest(
struct lwp *l,
- struct lwp *lt,
+ struct lwp **lt,
int req,
void *addr,
int data
@@ -326,7 +326,9 @@
/* FALLTHROUGH */
case PT_GETXSTATE:
/* write = false done above. */
- if (!process_machdep_validfpu(lt->l_proc))
+ if ((error = ptrace_update_lwp((*lt)->l_proc, lt, data)) != 0)
+ return error;
+ if (!process_machdep_validfpu((*lt)->l_proc))
return EINVAL;
if (__predict_false(l->l_proc->p_flag & PK_32)) {
struct netbsd32_iovec user_iov;
@@ -357,7 +359,7 @@
uio.uio_resid = iov.iov_len;
uio.uio_rw = write ? UIO_WRITE : UIO_READ;
uio.uio_vmspace = vm;
- error = process_machdep_doxstate(l, lt, &uio);
+ error = process_machdep_doxstate(l, *lt, &uio);
uvmspace_free(vm);
return error;
@@ -367,8 +369,10 @@
/* FALLTHROUGH */
case PT_GETXMMREGS: /* only for COMPAT_NETBSD32 */
/* write = false done above. */
+ if ((error = ptrace_update_lwp((*lt)->l_proc, lt, data)) != 0)
+ return error;
MODULE_HOOK_CALL(netbsd32_process_doxmmregs_hook,
- (l, lt, addr, write), EINVAL, error);
+ (l, *lt, addr, write), EINVAL, error);
return error;
}
diff -r 423fdd3e8c0a -r c844a12355af sys/arch/i386/i386/process_machdep.c
--- a/sys/arch/i386/i386/process_machdep.c Thu Oct 15 10:20:44 2020 +0000
+++ b/sys/arch/i386/i386/process_machdep.c Thu Oct 15 17:37:35 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: process_machdep.c,v 1.94 2019/08/06 02:04:43 kamil Exp $ */
+/* $NetBSD: process_machdep.c,v 1.95 2020/10/15 17:37:35 mgorny Exp $ */
/*-
* Copyright (c) 1998, 2000, 2001, 2008 The NetBSD Foundation, Inc.
@@ -75,7 +75,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.94 2019/08/06 02:04:43 kamil Exp $");
+__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.95 2020/10/15 17:37:35 mgorny Exp $");
#include "opt_ptrace.h"
@@ -273,7 +273,7 @@
int
ptrace_machdep_dorequest(
struct lwp *l,
- struct lwp *lt,
+ struct lwp **lt,
int req,
void *addr,
int data
@@ -293,7 +293,9 @@
/* FALLTHROUGH */
case PT_GETXMMREGS:
/* write = 0 done above. */
- if (!process_machdep_validxmmregs(lt->l_proc))
+ if ((error = ptrace_update_lwp((*lt)->l_proc, lt, data)) != 0)
+ return error;
+ if (!process_machdep_validxmmregs((*lt)->l_proc))
return (EINVAL);
error = proc_vmspace_getref(l->l_proc, &vm);
if (error) {
@@ -307,7 +309,7 @@
uio.uio_resid = sizeof(struct xmmregs);
uio.uio_rw = write ? UIO_WRITE : UIO_READ;
uio.uio_vmspace = vm;
- error = process_machdep_doxmmregs(l, lt, &uio);
+ error = process_machdep_doxmmregs(l, *lt, &uio);
uvmspace_free(vm);
return error;
@@ -317,7 +319,9 @@
/* FALLTHROUGH */
case PT_GETXSTATE:
/* write = 0 done above. */
- if (!process_machdep_validxstate(lt->l_proc))
+ if ((error = ptrace_update_lwp((*lt)->l_proc, lt, data)) != 0)
+ return error;
+ if (!process_machdep_validxstate((*lt)->l_proc))
return EINVAL;
if ((error = copyin(addr, &user_iov, sizeof(user_iov))) != 0)
return error;
@@ -335,7 +339,7 @@
uio.uio_resid = iov.iov_len;
uio.uio_rw = write ? UIO_WRITE : UIO_READ;
uio.uio_vmspace = vm;
- error = process_machdep_doxstate(l, lt, &uio);
+ error = process_machdep_doxstate(l, *lt, &uio);
uvmspace_free(vm);
return error;
}
diff -r 423fdd3e8c0a -r c844a12355af sys/arch/powerpc/include/ptrace.h
--- a/sys/arch/powerpc/include/ptrace.h Thu Oct 15 10:20:44 2020 +0000
+++ b/sys/arch/powerpc/include/ptrace.h Thu Oct 15 17:37:35 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.17 2020/06/21 00:39:59 rin Exp $ */
+/* $NetBSD: ptrace.h,v 1.18 2020/10/15 17:37:35 mgorny Exp $ */
#ifndef _POWERPC_PTRACE_H
#define _POWERPC_PTRACE_H
@@ -41,7 +41,7 @@
case PT_GETVECREGS: \
case PT_SETVECREGS:
-int ptrace_machdep_dorequest(struct lwp *, struct lwp *, int, void *, int);
+int ptrace_machdep_dorequest(struct lwp *, struct lwp **, int, void *, int);
int process_machdep_dovecregs(struct lwp *, struct lwp *, struct uio *);
int process_machdep_validvecregs(struct proc *);
diff -r 423fdd3e8c0a -r c844a12355af sys/arch/powerpc/powerpc/process_machdep.c
--- a/sys/arch/powerpc/powerpc/process_machdep.c Thu Oct 15 10:20:44 2020 +0000
+++ b/sys/arch/powerpc/powerpc/process_machdep.c Thu Oct 15 17:37:35 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: process_machdep.c,v 1.39 2020/07/06 09:34:18 rin Exp $ */
+/* $NetBSD: process_machdep.c,v 1.40 2020/10/15 17:37:36 mgorny Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -32,7 +32,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.39 2020/07/06 09:34:18 rin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.40 2020/10/15 17:37:36 mgorny Exp $");
#ifdef _KERNEL_OPT
#include "opt_altivec.h"
@@ -188,7 +188,7 @@
}
int
-ptrace_machdep_dorequest(struct lwp *l, struct lwp *lt,
+ptrace_machdep_dorequest(struct lwp *l, struct lwp **lt,
int req, void *addr, int data)
{
struct uio uio;
@@ -201,7 +201,9 @@
case PT_GETVECREGS:
/* write = 0 done above. */
- if (!process_machdep_validvecregs(lt->l_proc))
+ if ((error = ptrace_update_lwp((*lt)->l_proc, lt, data)) != 0)
+ return error;
+ if (!process_machdep_validvecregs((*lt)->l_proc))
return (EINVAL);
iov.iov_base = addr;
iov.iov_len = sizeof(struct vreg);
@@ -211,7 +213,7 @@
uio.uio_resid = sizeof(struct vreg);
uio.uio_rw = write ? UIO_WRITE : UIO_READ;
uio.uio_vmspace = l->l_proc->p_vmspace;
- return process_machdep_dovecregs(l, lt, &uio);
+ return process_machdep_dovecregs(l, *lt, &uio);
}
#ifdef DIAGNOSTIC
diff -r 423fdd3e8c0a -r c844a12355af sys/arch/sh3/include/ptrace.h
--- a/sys/arch/sh3/include/ptrace.h Thu Oct 15 10:20:44 2020 +0000
+++ b/sys/arch/sh3/include/ptrace.h Thu Oct 15 17:37:35 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.18 2020/09/14 05:04:05 mrg Exp $ */
+/* $NetBSD: ptrace.h,v 1.19 2020/10/15 17:37:36 mgorny Exp $ */
/*
* Copyright (c) 1993 Christopher G. Demetriou
@@ -95,7 +95,7 @@
#endif /* COMPAT_40 */
#ifdef __HAVE_PTRACE_MACHDEP
-int ptrace_machdep_dorequest(struct lwp *, struct lwp *, int, void *, int);
+int ptrace_machdep_dorequest(struct lwp *, struct lwp **, int, void *, int);
#endif
#define PTRACE_LWP_GETPRIVATE(l) (l)->l_md.md_regs->tf_gbr
diff -r 423fdd3e8c0a -r c844a12355af sys/arch/sh3/sh3/process_machdep.c
--- a/sys/arch/sh3/sh3/process_machdep.c Thu Oct 15 10:20:44 2020 +0000
+++ b/sys/arch/sh3/sh3/process_machdep.c Thu Oct 15 17:37:35 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: process_machdep.c,v 1.22 2019/11/20 19:37:52 pgoyette Exp $ */
+/* $NetBSD: process_machdep.c,v 1.23 2020/10/15 17:37:36 mgorny Exp $ */
/*
* Copyright (c) 1993 The Regents of the University of California.
@@ -77,7 +77,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.22 2019/11/20 19:37:52 pgoyette Exp $");
+__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.23 2020/10/15 17:37:36 mgorny Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -183,7 +183,7 @@
#ifdef __HAVE_PTRACE_MACHDEP
int
-ptrace_machdep_dorequest(struct lwp *l, struct lwp *lt,
+ptrace_machdep_dorequest(struct lwp *l, struct lwp **lt,
int req, void *addr, int data)
{
struct uio uio;
@@ -200,7 +200,9 @@
/* FALLTHROUGH*/
case PT___GETREGS40:
- if (!process_validregs(lt))
+ if ((error = ptrace_update_lwp((*lt)->l_proc, lt, data)) != 0)
+ return error;
+ if (!process_validregs(*lt))
return EINVAL;
iov.iov_base = addr;
iov.iov_len = sizeof(struct __reg40);
@@ -210,7 +212,7 @@
uio.uio_resid = sizeof(struct __reg40);
uio.uio_rw = write ? UIO_WRITE : UIO_READ;
uio.uio_vmspace = l->l_proc->p_vmspace;
- return process_machdep_doregs40(l, lt, &uio);
+ return process_machdep_doregs40(l, *lt, &uio);
#endif /* COMPAT_40 */
}
}
diff -r 423fdd3e8c0a -r c844a12355af sys/kern/sys_ptrace_common.c
--- a/sys/kern/sys_ptrace_common.c Thu Oct 15 10:20:44 2020 +0000
+++ b/sys/kern/sys_ptrace_common.c Thu Oct 15 17:37:35 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sys_ptrace_common.c,v 1.83 2020/05/30 08:41:22 maxv Exp $ */
+/* $NetBSD: sys_ptrace_common.c,v 1.84 2020/10/15 17:37:36 mgorny Exp $ */
/*-
* Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
@@ -118,7 +118,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sys_ptrace_common.c,v 1.83 2020/05/30 08:41:22 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sys_ptrace_common.c,v 1.84 2020/10/15 17:37:36 mgorny Exp $");
#ifdef _KERNEL_OPT
#include "opt_ptrace.h"
@@ -565,7 +565,7 @@
}
}
-static int
+int
ptrace_update_lwp(struct proc *t, struct lwp **lt, lwpid_t lid)
{
if (lid == 0 || lid == (*lt)->l_lid || t->p_nlwps == 1)
@@ -1569,7 +1569,7 @@
#ifdef __HAVE_PTRACE_MACHDEP
PTRACE_MACHDEP_REQUEST_CASES
- error = ptrace_machdep_dorequest(l, lt, req, addr, data);
+ error = ptrace_machdep_dorequest(l, <, req, addr, data);
break;
#endif
}
diff -r 423fdd3e8c0a -r c844a12355af sys/sys/ptrace.h
--- a/sys/sys/ptrace.h Thu Oct 15 10:20:44 2020 +0000
+++ b/sys/sys/ptrace.h Thu Oct 15 17:37:35 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.70 2020/05/14 13:32:15 kamil Exp $ */
+/* $NetBSD: ptrace.h,v 1.71 2020/10/15 17:37:36 mgorny Exp $ */
/*-
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