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7#include <errno.h>
8#include <sys/ptrace.h>
9#ifdef __i386__
10#include <sys/user.h>
11#endif
12#include <longjmp.h>
13#include <sysdep/ptrace_user.h>
14#include <sys/uio.h>
15#include <asm/sigcontext.h>
16#include <linux/elf.h>
17
18int have_xstate_support;
19
20int save_i387_registers(int pid, unsigned long *fp_regs)
21{
22 if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
23 return -errno;
24 return 0;
25}
26
27int save_fp_registers(int pid, unsigned long *fp_regs)
28{
29 struct iovec iov;
30
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)
35 return -errno;
36 return 0;
37 } else {
38 return save_i387_registers(pid, fp_regs);
39 }
40}
41
42int restore_i387_registers(int pid, unsigned long *fp_regs)
43{
44 if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
45 return -errno;
46 return 0;
47}
48
49int restore_fp_registers(int pid, unsigned long *fp_regs)
50{
51 struct iovec iov;
52
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)
57 return -errno;
58 return 0;
59 } else {
60 return restore_i387_registers(pid, fp_regs);
61 }
62}
63
64#ifdef __i386__
65int have_fpx_regs = 1;
66int save_fpx_registers(int pid, unsigned long *fp_regs)
67{
68 if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0)
69 return -errno;
70 return 0;
71}
72
73int restore_fpx_registers(int pid, unsigned long *fp_regs)
74{
75 if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0)
76 return -errno;
77 return 0;
78}
79
80int get_fp_registers(int pid, unsigned long *regs)
81{
82 if (have_fpx_regs)
83 return save_fpx_registers(pid, regs);
84 else
85 return save_fp_registers(pid, regs);
86}
87
88int put_fp_registers(int pid, unsigned long *regs)
89{
90 if (have_fpx_regs)
91 return restore_fpx_registers(pid, regs);
92 else
93 return restore_fp_registers(pid, regs);
94}
95
96void arch_init_registers(int pid)
97{
98 struct user_fpxregs_struct fpx_regs;
99 int err;
100
101 err = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpx_regs);
102 if (!err)
103 return;
104
105 if (errno != EIO)
106 panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
107 errno);
108
109 have_fpx_regs = 0;
110}
111#else
112
113int get_fp_registers(int pid, unsigned long *regs)
114{
115 return save_fp_registers(pid, regs);
116}
117
118int put_fp_registers(int pid, unsigned long *regs)
119{
120 return restore_fp_registers(pid, regs);
121}
122
123void arch_init_registers(int pid)
124{
125 struct _xstate fp_regs;
126 struct iovec iov;
127
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;
132}
133#endif
134
135unsigned long get_thread_reg(int reg, jmp_buf *buf)
136{
137 switch (reg) {
138#ifdef __i386__
139 case HOST_IP:
140 return buf[0]->__eip;
141 case HOST_SP:
142 return buf[0]->__esp;
143 case HOST_BP:
144 return buf[0]->__ebp;
145#else
146 case HOST_IP:
147 return buf[0]->__rip;
148 case HOST_SP:
149 return buf[0]->__rsp;
150 case HOST_BP:
151 return buf[0]->__rbp;
152#endif
153 default:
154 printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
155 reg);
156 return 0;
157 }
158}
159
