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 #include <stdlib.h>
14
15 /* This is set once at boot time and not changed thereafter */
16
17 unsigned long exec_regs[MAX_REG_NR];
18 unsigned long *exec_fp_regs;
19
init_pid_registers(int pid)20 int init_pid_registers(int pid)
21 {
22 int err;
23
24 err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
25 if (err < 0)
26 return -errno;
27
28 err = arch_init_registers(pid);
29 if (err < 0)
30 return err;
31
32 exec_fp_regs = malloc(host_fp_size);
33 get_fp_registers(pid, exec_fp_regs);
34 return 0;
35 }
36
get_safe_registers(unsigned long * regs,unsigned long * fp_regs)37 void get_safe_registers(unsigned long *regs, unsigned long *fp_regs)
38 {
39 memcpy(regs, exec_regs, sizeof(exec_regs));
40
41 if (fp_regs)
42 memcpy(fp_regs, exec_fp_regs, host_fp_size);
43 }
44