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7#include <errno.h>
8#include <stdlib.h>
9#include <sys/ptrace.h>
10#ifdef __i386__
11#include <sys/user.h>
12#endif
13#include <longjmp.h>
14#include <sysdep/ptrace_user.h>
15#include <sys/uio.h>
16#include <asm/sigcontext.h>
17#include <linux/elf.h>
18
19int have_xstate_support;
20
21int save_i387_registers(int pid, unsigned long *fp_regs)
22{
23 if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
24 return -errno;
25 return 0;
26}
27
28int save_fp_registers(int pid, unsigned long *fp_regs)
29{
30#ifdef PTRACE_GETREGSET
31 struct iovec iov;
32
33 if (have_xstate_support) {
34 iov.iov_base = fp_regs;
35 iov.iov_len = FP_SIZE * sizeof(unsigned long);
36 if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
37 return -errno;
38 return 0;
39 } else
40#endif
41 return save_i387_registers(pid, fp_regs);
42}
43
44int restore_i387_registers(int pid, unsigned long *fp_regs)
45{
46 if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
47 return -errno;
48 return 0;
49}
50
51int restore_fp_registers(int pid, unsigned long *fp_regs)
52{
53#ifdef PTRACE_SETREGSET
54 struct iovec iov;
55 if (have_xstate_support) {
56 iov.iov_base = fp_regs;
57 iov.iov_len = FP_SIZE * sizeof(unsigned long);
58 if (ptrace(PTRACE_SETREGSET, pid, NT_X86_XSTATE, &iov) < 0)
59 return -errno;
60 return 0;
61 } else
62#endif
63 return restore_i387_registers(pid, fp_regs);
64}
65
66#ifdef __i386__
67int have_fpx_regs = 1;
68int save_fpx_registers(int pid, unsigned long *fp_regs)
69{
70 if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0)
71 return -errno;
72 return 0;
73}
74
75int restore_fpx_registers(int pid, unsigned long *fp_regs)
76{
77 if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0)
78 return -errno;
79 return 0;
80}
81
82int get_fp_registers(int pid, unsigned long *regs)
83{
84 if (have_fpx_regs)
85 return save_fpx_registers(pid, regs);
86 else
87 return save_fp_registers(pid, regs);
88}
89
90int put_fp_registers(int pid, unsigned long *regs)
91{
92 if (have_fpx_regs)
93 return restore_fpx_registers(pid, regs);
94 else
95 return restore_fp_registers(pid, regs);
96}
97
98void arch_init_registers(int pid)
99{
100 struct user_fpxregs_struct fpx_regs;
101 int err;
102
103 err = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpx_regs);
104 if (!err)
105 return;
106
107 if (errno != EIO)
108 panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
109 errno);
110
111 have_fpx_regs = 0;
112}
113#else
114
115int get_fp_registers(int pid, unsigned long *regs)
116{
117 return save_fp_registers(pid, regs);
118}
119
120int put_fp_registers(int pid, unsigned long *regs)
121{
122 return restore_fp_registers(pid, regs);
123}
124
125void arch_init_registers(int pid)
126{
127#ifdef PTRACE_GETREGSET
128 void * fp_regs;
129 struct iovec iov;
130
131 fp_regs = malloc(FP_SIZE * sizeof(unsigned long));
132 if(fp_regs == NULL)
133 return;
134
135 iov.iov_base = fp_regs;
136 iov.iov_len = FP_SIZE * sizeof(unsigned long);
137 if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) == 0)
138 have_xstate_support = 1;
139
140 free(fp_regs);
141#endif
142}
143#endif
144
145unsigned long get_thread_reg(int reg, jmp_buf *buf)
146{
147 switch (reg) {
148#ifdef __i386__
149 case HOST_IP:
150 return buf[0]->__eip;
151 case HOST_SP:
152 return buf[0]->__esp;
153 case HOST_BP:
154 return buf[0]->__ebp;
155#else
156 case HOST_IP:
157 return buf[0]->__rip;
158 case HOST_SP:
159 return buf[0]->__rsp;
160 case HOST_BP:
161 return buf[0]->__rbp;
162#endif
163 default:
164 printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
165 reg);
166 return 0;
167 }
168}
169
