1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2004 PathScale, Inc
 4 * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 
 5 */
 6
 7#include <errno.h>
 8#include <string.h>
 9#include <sys/ptrace.h>
10#include <sysdep/ptrace.h>
11#include <sysdep/ptrace_user.h>
12#include <registers.h>
13
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
14/* This is set once at boot time and not changed thereafter */
15
16static unsigned long exec_regs[MAX_REG_NR];
17static unsigned long exec_fp_regs[FP_SIZE];
18
19int init_pid_registers(int pid)
20{
21	int err;
22
23	err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
24	if (err < 0)
25		return -errno;
26
27	arch_init_registers(pid);
28	get_fp_registers(pid, exec_fp_regs);
29	return 0;
30}
31
32void get_safe_registers(unsigned long *regs, unsigned long *fp_regs)
33{
34	memcpy(regs, exec_regs, sizeof(exec_regs));
35
36	if (fp_regs)
37		memcpy(fp_regs, exec_fp_regs, sizeof(exec_fp_regs));
38}

 
 1/*
 2 * Copyright (C) 2004 PathScale, Inc
 3 * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 4 * Licensed under the GPL
 5 */
 6
 7#include <errno.h>
 8#include <string.h>
 9#include <sys/ptrace.h>
10#include <sysdep/ptrace.h>
11#include <sysdep/ptrace_user.h>
12#include <registers.h>
13
14int save_registers(int pid, struct uml_pt_regs *regs)
15{
16	int err;
17
18	err = ptrace(PTRACE_GETREGS, pid, 0, regs->gp);
19	if (err < 0)
20		return -errno;
21	return 0;
22}
23
24int restore_registers(int pid, struct uml_pt_regs *regs)
25{
26	int err;
27
28	err = ptrace(PTRACE_SETREGS, pid, 0, regs->gp);
29	if (err < 0)
30		return -errno;
31	return 0;
32}
33
34/* This is set once at boot time and not changed thereafter */
35
36static unsigned long exec_regs[MAX_REG_NR];
37static unsigned long exec_fp_regs[FP_SIZE];
38
39int init_registers(int pid)
40{
41	int err;
42
43	err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
44	if (err < 0)
45		return -errno;
46
47	arch_init_registers(pid);
48	get_fp_registers(pid, exec_fp_regs);
49	return 0;
50}
51
52void get_safe_registers(unsigned long *regs, unsigned long *fp_regs)
53{
54	memcpy(regs, exec_regs, sizeof(exec_regs));
55
56	if (fp_regs)
57		memcpy(fp_regs, exec_fp_regs, sizeof(exec_fp_regs));
58}