2 * Copyright (C) 2004 PathScale, Inc
3 * Licensed under the GPL
7 #include <sys/ptrace.h>
9 #include "ptrace_user.h"
10 #include "uml-config.h"
11 #include "skas_ptregs.h"
12 #include "registers.h"
16 /* These are set once at boot time and not changed thereafter */
18 static unsigned long exec_regs[MAX_REG_NR];
19 static unsigned long exec_fp_regs[HOST_FP_SIZE];
21 int save_fp_registers(int pid, unsigned long *fp_regs)
23 if(ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
28 int restore_fp_registers(int pid, unsigned long *fp_regs)
30 if(ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
35 void init_thread_registers(union uml_pt_regs *to)
37 memcpy(to->skas.regs, exec_regs, sizeof(to->skas.regs));
38 memcpy(to->skas.fp, exec_fp_regs, sizeof(to->skas.fp));
41 static int move_registers(int pid, int int_op, int fp_op,
42 union uml_pt_regs *regs)
44 if(ptrace(int_op, pid, 0, regs->skas.regs) < 0)
47 if(ptrace(fp_op, pid, 0, regs->skas.fp) < 0)
53 void save_registers(int pid, union uml_pt_regs *regs)
57 err = move_registers(pid, PTRACE_GETREGS, PTRACE_GETFPREGS, regs);
59 panic("save_registers - saving registers failed, errno = %d\n",
63 void restore_registers(int pid, union uml_pt_regs *regs)
67 err = move_registers(pid, PTRACE_SETREGS, PTRACE_SETFPREGS, regs);
69 panic("restore_registers - saving registers failed, "
70 "errno = %d\n", -err);
73 void init_registers(int pid)
77 err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
79 panic("check_ptrace : PTRACE_GETREGS failed, errno = %d",
82 err = ptrace(PTRACE_GETFPREGS, pid, 0, exec_fp_regs);
84 panic("check_ptrace : PTRACE_GETFPREGS failed, errno = %d",
88 void get_safe_registers(unsigned long *regs, unsigned long *fp_regs)
90 memcpy(regs, exec_regs, sizeof(exec_regs));
92 memcpy(fp_regs, exec_fp_regs,
93 HOST_FP_SIZE * sizeof(unsigned long));
96 unsigned long get_thread_reg(int reg, jmp_buf *buf)
99 case RIP: return buf[0]->__rip;
100 case RSP: return buf[0]->__rsp;
101 case RBP: return buf[0]->__rbp;
103 printk("get_thread_regs - unknown register %d\n", reg);