/* * Copyright (C) 2004 PathScale, Inc * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #include <errno.h> #include <string.h> #include <sys/ptrace.h> #include <sysdep/ptrace.h> #include <sysdep/ptrace_user.h> #include <registers.h> int save_registers(int pid, struct uml_pt_regs *regs) { int err; err = ptrace(PTRACE_GETREGS, pid, 0, regs->gp); if (err < 0) return -errno; return 0; } int restore_registers(int pid, struct uml_pt_regs *regs) { int err; err = ptrace(PTRACE_SETREGS, pid, 0, regs->gp); if (err < 0) return -errno; return 0; } /* This is set once at boot time and not changed thereafter */ static unsigned long exec_regs[MAX_REG_NR]; static unsigned long exec_fp_regs[FP_SIZE]; int init_registers(int pid) { int err; err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs); if (err < 0) return -errno; arch_init_registers(pid); get_fp_registers(pid, exec_fp_regs); return 0; } void get_safe_registers(unsigned long *regs, unsigned long *fp_regs) { memcpy(regs, exec_regs, sizeof(exec_regs)); if (fp_regs) memcpy(fp_regs, exec_fp_regs, sizeof(exec_fp_regs)); }