2 * Copyright (C) 2004 PathScale, Inc
3 * Licensed under the GPL
9 #include "ptrace_user.h"
10 #include "uml-config.h"
11 #include "skas_ptregs.h"
12 #include "registers.h"
15 /* These are set once at boot time and not changed thereafter */
17 static unsigned long exec_regs[HOST_FRAME_SIZE];
18 static unsigned long exec_fp_regs[HOST_FP_SIZE];
20 void init_thread_registers(union uml_pt_regs *to)
22 memcpy(to->skas.regs, exec_regs, sizeof(to->skas.regs));
23 memcpy(to->skas.fp, exec_fp_regs, sizeof(to->skas.fp));
26 static int move_registers(int pid, int int_op, int fp_op,
27 union uml_pt_regs *regs)
29 if(ptrace(int_op, pid, 0, regs->skas.regs) < 0)
32 if(ptrace(fp_op, pid, 0, regs->skas.fp) < 0)
38 void save_registers(int pid, union uml_pt_regs *regs)
42 err = move_registers(pid, PTRACE_GETREGS, PTRACE_GETFPREGS, regs);
44 panic("save_registers - saving registers failed, errno = %d\n",
48 void restore_registers(int pid, union uml_pt_regs *regs)
52 err = move_registers(pid, PTRACE_SETREGS, PTRACE_SETFPREGS, regs);
54 panic("restore_registers - saving registers failed, "
55 "errno = %d\n", -err);
58 void init_registers(int pid)
62 err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
64 panic("check_ptrace : PTRACE_GETREGS failed, errno = %d",
67 err = ptrace(PTRACE_GETFPREGS, pid, 0, exec_fp_regs);
69 panic("check_ptrace : PTRACE_GETFPREGS failed, errno = %d",
73 void get_safe_registers(unsigned long *regs)
75 memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long));
78 void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer)
80 struct __jmp_buf_tag *jmpbuf = buffer;
82 UPT_SET(uml_regs, RIP, jmpbuf->__jmpbuf[JB_PC]);
83 UPT_SET(uml_regs, RSP, jmpbuf->__jmpbuf[JB_RSP]);
84 UPT_SET(uml_regs, RBP, jmpbuf->__jmpbuf[JB_RBP]);