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 16 static unsigned long exec_regs[MAX_REG_NR]; 17 static unsigned long exec_fp_regs[FP_SIZE]; 18 19 int 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 32 void 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 } 39