| /* |
| * Copyright (C) 2004 PathScale, Inc |
| * Licensed under the GPL |
| */ |
| |
| #include <errno.h> |
| #include <string.h> |
| #include <sys/ptrace.h> |
| #include "user.h" |
| #include "sysdep/ptrace.h" |
| |
| /* This is set once at boot time and not changed thereafter */ |
| |
| static unsigned long exec_regs[MAX_REG_NR]; |
| |
| void init_thread_registers(struct uml_pt_regs *to) |
| { |
| memcpy(to->regs, exec_regs, sizeof(to->regs)); |
| } |
| |
| void save_registers(int pid, struct uml_pt_regs *regs) |
| { |
| int err; |
| |
| err = ptrace(PTRACE_GETREGS, pid, 0, regs->regs); |
| if(err < 0) |
| panic("save_registers - saving registers failed, errno = %d\n", |
| errno); |
| } |
| |
| void restore_registers(int pid, struct uml_pt_regs *regs) |
| { |
| int err; |
| |
| err = ptrace(PTRACE_SETREGS, pid, 0, regs->regs); |
| if(err < 0) |
| panic("restore_registers - saving registers failed, " |
| "errno = %d\n", errno); |
| } |
| |
| void init_registers(int pid) |
| { |
| int err; |
| |
| err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs); |
| if(err) |
| panic("check_ptrace : PTRACE_GETREGS failed, errno = %d", |
| errno); |
| } |
| |
| void get_safe_registers(unsigned long *regs) |
| { |
| memcpy(regs, exec_regs, sizeof(exec_regs)); |
| } |