2 * Copyright (C) 2004 PathScale, Inc
3 * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4 * Licensed under the GPL
8 #include <sys/ptrace.h>
13 #include <sysdep/ptrace_user.h>
15 #include <asm/sigcontext.h>
16 #include <linux/elf.h>
18 int have_xstate_support;
20 int save_i387_registers(int pid, unsigned long *fp_regs)
22 if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
27 int save_fp_registers(int pid, unsigned long *fp_regs)
31 if (have_xstate_support) {
32 iov.iov_base = fp_regs;
33 iov.iov_len = sizeof(struct _xstate);
34 if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
38 return save_i387_registers(pid, fp_regs);
42 int restore_i387_registers(int pid, unsigned long *fp_regs)
44 if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
49 int restore_fp_registers(int pid, unsigned long *fp_regs)
53 if (have_xstate_support) {
54 iov.iov_base = fp_regs;
55 iov.iov_len = sizeof(struct _xstate);
56 if (ptrace(PTRACE_SETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
60 return restore_i387_registers(pid, fp_regs);
65 int have_fpx_regs = 1;
66 int save_fpx_registers(int pid, unsigned long *fp_regs)
68 if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0)
73 int restore_fpx_registers(int pid, unsigned long *fp_regs)
75 if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0)
80 int get_fp_registers(int pid, unsigned long *regs)
83 return save_fpx_registers(pid, regs);
85 return save_fp_registers(pid, regs);
88 int put_fp_registers(int pid, unsigned long *regs)
91 return restore_fpx_registers(pid, regs);
93 return restore_fp_registers(pid, regs);
96 void arch_init_registers(int pid)
98 struct user_fpxregs_struct fpx_regs;
101 err = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpx_regs);
106 panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
113 int get_fp_registers(int pid, unsigned long *regs)
115 return save_fp_registers(pid, regs);
118 int put_fp_registers(int pid, unsigned long *regs)
120 return restore_fp_registers(pid, regs);
123 void arch_init_registers(int pid)
125 struct _xstate fp_regs;
128 iov.iov_base = &fp_regs;
129 iov.iov_len = sizeof(struct _xstate);
130 if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) == 0)
131 have_xstate_support = 1;
135 unsigned long get_thread_reg(int reg, jmp_buf *buf)
140 return buf[0]->__eip;
142 return buf[0]->__esp;
144 return buf[0]->__ebp;
147 return buf[0]->__rip;
149 return buf[0]->__rsp;
151 return buf[0]->__rbp;
154 printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",