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[src/trunk]: src/sys/arch/amd64 Add support for PT_[GS]ETXMMREGS requests for...
details: https://anonhg.NetBSD.org/src/rev/9ae6774271e3
branches: trunk
changeset: 461459:9ae6774271e3
user: rin <rin%NetBSD.org@localhost>
date: Wed Nov 27 09:16:58 2019 +0000
description:
Add support for PT_[GS]ETXMMREGS requests for COMPAT_NETBSD32 on amd64.
For this purpose, PT_[GS]ETXMMREGS are added to amd64/ptrace.h. These
are intended for internal usage for COMPAT_NETBSD32, and therefore not
exposed to userland.
Thanks to kamil, mgorny, and pgoyette for their kind review!
XXX
pullup to netbsd-9
diffstat:
sys/arch/amd64/amd64/netbsd32_machdep.c | 85 +++++++++++++++++++++++++++++-
sys/arch/amd64/amd64/process_machdep.c | 16 +++++-
sys/arch/amd64/include/netbsd32_machdep.h | 9 ++-
sys/arch/amd64/include/ptrace.h | 17 +++++-
4 files changed, 118 insertions(+), 9 deletions(-)
diffs (248 lines):
diff -r d60e60173d51 -r 9ae6774271e3 sys/arch/amd64/amd64/netbsd32_machdep.c
--- a/sys/arch/amd64/amd64/netbsd32_machdep.c Wed Nov 27 09:08:14 2019 +0000
+++ b/sys/arch/amd64/amd64/netbsd32_machdep.c Wed Nov 27 09:16:58 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: netbsd32_machdep.c,v 1.131 2019/11/20 19:37:51 pgoyette Exp $ */
+/* $NetBSD: netbsd32_machdep.c,v 1.132 2019/11/27 09:16:58 rin Exp $ */
/*
* Copyright (c) 2001 Wasabi Systems, Inc.
@@ -36,7 +36,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: netbsd32_machdep.c,v 1.131 2019/11/20 19:37:51 pgoyette Exp $");
+__KERNEL_RCSID(0, "$NetBSD: netbsd32_machdep.c,v 1.132 2019/11/27 09:16:58 rin Exp $");
#ifdef _KERNEL_OPT
#include "opt_compat_netbsd.h"
@@ -86,6 +86,9 @@
const char machine32[] = "i386";
const char machine_arch32[] = "i386";
+static int netbsd32_process_doxmmregs(struct lwp *, struct lwp *, void *, bool);
+static int netbsd32_process_xmmregio(struct lwp *, struct lwp *, struct uio *);
+
#ifdef USER_LDT
static int x86_64_get_ldt32(struct lwp *, void *, register_t *);
static int x86_64_set_ldt32(struct lwp *, void *, register_t *);
@@ -344,8 +347,8 @@
case PT32_SETREGS: return PT_SETREGS;
case PT32_GETFPREGS: return PT_GETFPREGS;
case PT32_SETFPREGS: return PT_SETFPREGS;
- case PT32_GETXMMREGS: return -1;
- case PT32_SETXMMREGS: return -1;
+ case PT32_GETXMMREGS: return PT_GETXMMREGS;
+ case PT32_SETXMMREGS: return PT_SETXMMREGS;
case PT32_GETDBREGS: return PT_GETDBREGS;
case PT32_SETDBREGS: return PT_SETDBREGS;
case PT32_SETSTEP: return PT_SETSTEP;
@@ -500,6 +503,77 @@
return 0;
}
+static int
+netbsd32_process_doxmmregs(struct lwp *curl, struct lwp *l, void *addr,
+ bool write)
+ /* curl: tracer */
+ /* l: traced */
+{
+ struct uio uio;
+ struct iovec iov;
+ struct vmspace *vm;
+ int error;
+
+ if ((curl->l_proc->p_flag & PK_32) == 0 ||
+ (l->l_proc->p_flag & PK_32) == 0)
+ return EINVAL;
+
+ if (!process_machdep_validfpu(l->l_proc))
+ return EINVAL;
+
+ error = proc_vmspace_getref(curl->l_proc, &vm);
+ if (error)
+ return error;
+
+ iov.iov_base = addr;
+ iov.iov_len = sizeof(struct xmmregs32);
+ uio.uio_iov = &iov;
+ uio.uio_iovcnt = 1;
+ uio.uio_offset = 0;
+ uio.uio_resid = sizeof(struct xmmregs32);
+ uio.uio_rw = write ? UIO_WRITE : UIO_READ;
+ uio.uio_vmspace = vm;
+
+ error = netbsd32_process_xmmregio(curl, l, &uio);
+ uvmspace_free(vm);
+ return error;
+}
+
+static int
+netbsd32_process_xmmregio(struct lwp *curl, struct lwp *l, struct uio *uio)
+ /* curl: tracer */
+ /* l: traced */
+{
+ struct xmmregs32 regs;
+ int error;
+ char *kv;
+ size_t kl;
+
+ kl = sizeof(regs);
+ kv = (char *)®s;
+
+ if (uio->uio_offset < 0 || uio->uio_offset > (off_t)kl)
+ return EINVAL;
+
+ kv += uio->uio_offset;
+ kl -= uio->uio_offset;
+
+ if (kl > uio->uio_resid)
+ kl = uio->uio_resid;
+
+ process_read_fpregs_xmm(l, ®s.fxstate);
+ error = uiomove(kv, kl, uio);
+ if (error == 0 && uio->uio_rw == UIO_WRITE) {
+ if (l->l_proc->p_stat != SSTOP)
+ error = EBUSY;
+ else
+ process_write_fpregs_xmm(l, ®s.fxstate);
+ }
+
+ uio->uio_offset = 0;
+ return error;
+}
+
int
netbsd32_sysarch(struct lwp *l, const struct netbsd32_sysarch_args *uap, register_t *retval)
{
@@ -959,6 +1033,8 @@
MODULE_HOOK_SET(netbsd32_machine32_hook, "mach32", netbsd32_machine32);
MODULE_HOOK_SET(netbsd32_reg_validate_hook,
"mcontext32from64_validate", cpu_mcontext32from64_validate);
+ MODULE_HOOK_SET(netbsd32_process_doxmmregs_hook, "xmm32",
+ netbsd32_process_doxmmregs);
}
void
@@ -967,4 +1043,5 @@
MODULE_HOOK_UNSET(netbsd32_machine32_hook);
MODULE_HOOK_UNSET(netbsd32_reg_validate_hook);
+ MODULE_HOOK_UNSET(netbsd32_process_doxmmregs_hook);
}
diff -r d60e60173d51 -r 9ae6774271e3 sys/arch/amd64/amd64/process_machdep.c
--- a/sys/arch/amd64/amd64/process_machdep.c Wed Nov 27 09:08:14 2019 +0000
+++ b/sys/arch/amd64/amd64/process_machdep.c Wed Nov 27 09:16:58 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: process_machdep.c,v 1.46 2019/11/27 09:08:14 rin Exp $ */
+/* $NetBSD: process_machdep.c,v 1.47 2019/11/27 09:16:58 rin 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 1.46 2019/11/27 09:08:14 rin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: process_machdep.c,v 1.47 2019/11/27 09:16:58 rin Exp $");
#include "opt_xen.h"
#include <sys/param.h>
@@ -94,6 +94,8 @@
#include <x86/dbregs.h>
#include <x86/fpu.h>
+struct netbsd32_process_doxmmregs_hook_t netbsd32_process_doxmmregs_hook;
+
static inline struct trapframe *process_frame(struct lwp *);
static inline struct trapframe *
@@ -358,6 +360,16 @@
error = process_machdep_doxstate(l, lt, &uio);
uvmspace_free(vm);
return error;
+
+ case PT_SETXMMREGS: /* only for COMPAT_NETBSD32 */
+ write = true;
+
+ /* FALLTHROUGH */
+ case PT_GETXMMREGS: /* only for COMPAT_NETBSD32 */
+ /* write = false done above. */
+ MODULE_HOOK_CALL(netbsd32_process_doxmmregs_hook,
+ (l, lt, addr, write), EINVAL, error);
+ return error;
}
#ifdef DIAGNOSTIC
diff -r d60e60173d51 -r 9ae6774271e3 sys/arch/amd64/include/netbsd32_machdep.h
--- a/sys/arch/amd64/include/netbsd32_machdep.h Wed Nov 27 09:08:14 2019 +0000
+++ b/sys/arch/amd64/include/netbsd32_machdep.h Wed Nov 27 09:16:58 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: netbsd32_machdep.h,v 1.24 2019/06/26 12:30:12 mgorny Exp $ */
+/* $NetBSD: netbsd32_machdep.h,v 1.25 2019/11/27 09:16:58 rin Exp $ */
#ifndef _MACHINE_NETBSD32_H_
#define _MACHINE_NETBSD32_H_
@@ -7,6 +7,8 @@
#include <compat/sys/ucontext.h>
#include <compat/sys/siginfo.h>
+#include <x86/fpu.h>
+
/*
* i386 ptrace constants
* Please keep in sync with sys/arch/i386/include/ptrace.h.
@@ -136,6 +138,11 @@
int dr[8];
};
+struct xmmregs32 {
+ struct fxsave fxstate;
+};
+__CTASSERT(sizeof(struct xmmregs32) == 512);
+
struct x86_get_ldt_args32 {
int32_t start;
uint32_t desc;
diff -r d60e60173d51 -r 9ae6774271e3 sys/arch/amd64/include/ptrace.h
--- a/sys/arch/amd64/include/ptrace.h Wed Nov 27 09:08:14 2019 +0000
+++ b/sys/arch/amd64/include/ptrace.h Wed Nov 27 09:16:58 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ptrace.h,v 1.18 2019/11/27 09:08:14 rin Exp $ */
+/* $NetBSD: ptrace.h,v 1.19 2019/11/27 09:16:58 rin Exp $ */
/*
* Copyright (c) 1993 Christopher G. Demetriou
@@ -47,6 +47,13 @@
#define PT_CLEARSTEP (PT_FIRSTMACH + 8)
#define PT_GETXSTATE (PT_FIRSTMACH + 9)
#define PT_SETXSTATE (PT_FIRSTMACH + 10)
+#ifdef _KERNEL
+/*
+ * Only used internally for COMPAT_NETBSD32
+ */
+#define PT_GETXMMREGS (PT_FIRSTMACH + 11)
+#define PT_SETXMMREGS (PT_FIRSTMACH + 12)
+#endif
/* We have machine-dependent process tracing needs. */
#define __HAVE_PTRACE_MACHDEP
@@ -85,11 +92,17 @@
*/
#define PTRACE_MACHDEP_REQUEST_CASES \
case PT_GETXSTATE: \
- case PT_SETXSTATE:
+ case PT_SETXSTATE: \
+ case PT_GETXMMREGS: \
+ case PT_SETXMMREGS:
int process_machdep_doxstate(struct lwp *, struct lwp *, struct uio *);
int process_machdep_validfpu(struct proc *);
+#include <sys/module_hook.h>
+MODULE_HOOK(netbsd32_process_doxmmregs_hook, int,
+ (struct lwp *, struct lwp *, void *, bool));
+
#endif /* _KERNEL */
#ifdef _KERNEL_OPT
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