2 * Copyright (C) 2004 PathScale, Inc
3 * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 * Licensed under the GPL
9 #include <sys/ptrace.h>
14 #include <sysdep/ptrace_user.h>
16 #include <asm/sigcontext.h>
17 #include <linux/elf.h>
18 #include <registers.h>
20 int have_xstate_support;
22 int save_i387_registers(int pid, unsigned long *fp_regs)
24 if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
29 int save_fp_registers(int pid, unsigned long *fp_regs)
31 #ifdef PTRACE_GETREGSET
34 if (have_xstate_support) {
35 iov.iov_base = fp_regs;
36 iov.iov_len = FP_SIZE * sizeof(unsigned long);
37 if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
42 return save_i387_registers(pid, fp_regs);
45 int restore_i387_registers(int pid, unsigned long *fp_regs)
47 if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
52 int restore_fp_registers(int pid, unsigned long *fp_regs)
54 #ifdef PTRACE_SETREGSET
56 if (have_xstate_support) {
57 iov.iov_base = fp_regs;
58 iov.iov_len = FP_SIZE * sizeof(unsigned long);
59 if (ptrace(PTRACE_SETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
64 return restore_i387_registers(pid, fp_regs);
68 int have_fpx_regs = 1;
69 int save_fpx_registers(int pid, unsigned long *fp_regs)
71 if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0)
76 int restore_fpx_registers(int pid, unsigned long *fp_regs)
78 if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0)
83 int get_fp_registers(int pid, unsigned long *regs)
86 return save_fpx_registers(pid, regs);
88 return save_fp_registers(pid, regs);
91 int put_fp_registers(int pid, unsigned long *regs)
94 return restore_fpx_registers(pid, regs);
96 return restore_fp_registers(pid, regs);
99 void arch_init_registers(int pid)
101 struct user_fpxregs_struct fpx_regs;
104 err = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpx_regs);
109 panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
116 int get_fp_registers(int pid, unsigned long *regs)
118 return save_fp_registers(pid, regs);
121 int put_fp_registers(int pid, unsigned long *regs)
123 return restore_fp_registers(pid, regs);
126 void arch_init_registers(int pid)
128 #ifdef PTRACE_GETREGSET
132 fp_regs = malloc(FP_SIZE * sizeof(unsigned long));
136 iov.iov_base = fp_regs;
137 iov.iov_len = FP_SIZE * sizeof(unsigned long);
138 if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) == 0)
139 have_xstate_support = 1;
146 unsigned long get_thread_reg(int reg, jmp_buf *buf)
151 return buf[0]->__eip;
153 return buf[0]->__esp;
155 return buf[0]->__ebp;
158 return buf[0]->__rip;
160 return buf[0]->__rsp;
162 return buf[0]->__rbp;
165 printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",