]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/um/os-Linux/sys-i386/registers.c
2 * Copyright (C) 2004 PathScale, Inc
3 * Licensed under the GPL
9 #include "sysdep/ptrace_user.h"
10 #include "sysdep/ptrace.h"
11 #include "uml-config.h"
12 #include "skas_ptregs.h"
13 #include "registers.h"
16 /* These are set once at boot time and not changed thereafter */
18 static unsigned long exec_regs
[HOST_FRAME_SIZE
];
19 static unsigned long exec_fp_regs
[HOST_FP_SIZE
];
20 static unsigned long exec_fpx_regs
[HOST_XFP_SIZE
];
21 static int have_fpx_regs
= 1;
23 void init_thread_registers(union uml_pt_regs
*to
)
25 memcpy(to
->skas
.regs
, exec_regs
, sizeof(to
->skas
.regs
));
26 memcpy(to
->skas
.fp
, exec_fp_regs
, sizeof(to
->skas
.fp
));
28 memcpy(to
->skas
.xfp
, exec_fpx_regs
, sizeof(to
->skas
.xfp
));
31 /* XXX These need to use [GS]ETFPXREGS and copy_sc_{to,from}_user_skas needs
32 * to pass in a sufficiently large buffer
34 int save_fp_registers(int pid
, unsigned long *fp_regs
)
36 if(ptrace(PTRACE_GETFPREGS
, pid
, 0, fp_regs
) < 0)
41 int restore_fp_registers(int pid
, unsigned long *fp_regs
)
43 if(ptrace(PTRACE_SETFPREGS
, pid
, 0, fp_regs
) < 0)
48 static int move_registers(int pid
, int int_op
, union uml_pt_regs
*regs
,
49 int fp_op
, unsigned long *fp_regs
)
51 if(ptrace(int_op
, pid
, 0, regs
->skas
.regs
) < 0)
54 if(ptrace(fp_op
, pid
, 0, fp_regs
) < 0)
60 void save_registers(int pid
, union uml_pt_regs
*regs
)
62 unsigned long *fp_regs
;
66 fp_op
= PTRACE_GETFPXREGS
;
67 fp_regs
= regs
->skas
.xfp
;
70 fp_op
= PTRACE_GETFPREGS
;
71 fp_regs
= regs
->skas
.fp
;
74 err
= move_registers(pid
, PTRACE_GETREGS
, regs
, fp_op
, fp_regs
);
76 panic("save_registers - saving registers failed, errno = %d\n",
80 void restore_registers(int pid
, union uml_pt_regs
*regs
)
82 unsigned long *fp_regs
;
86 fp_op
= PTRACE_SETFPXREGS
;
87 fp_regs
= regs
->skas
.xfp
;
90 fp_op
= PTRACE_SETFPREGS
;
91 fp_regs
= regs
->skas
.fp
;
94 err
= move_registers(pid
, PTRACE_SETREGS
, regs
, fp_op
, fp_regs
);
96 panic("restore_registers - saving registers failed, "
97 "errno = %d\n", -err
);
100 void init_registers(int pid
)
104 err
= ptrace(PTRACE_GETREGS
, pid
, 0, exec_regs
);
106 panic("check_ptrace : PTRACE_GETREGS failed, errno = %d",
110 err
= ptrace(PTRACE_GETFPXREGS
, pid
, 0, exec_fpx_regs
);
114 panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
119 err
= ptrace(PTRACE_GETFPREGS
, pid
, 0, exec_fp_regs
);
121 panic("check_ptrace : PTRACE_GETFPREGS failed, errno = %d",
125 void get_safe_registers(unsigned long *regs
, unsigned long *fp_regs
)
127 memcpy(regs
, exec_regs
, HOST_FRAME_SIZE
* sizeof(unsigned long));
129 memcpy(fp_regs
, exec_fp_regs
,
130 HOST_FP_SIZE
* sizeof(unsigned long));
133 void get_thread_regs(union uml_pt_regs
*uml_regs
, void *buffer
)
135 struct __jmp_buf_tag
*jmpbuf
= buffer
;
137 UPT_SET(uml_regs
, EIP
, jmpbuf
->__jmpbuf
[JB_PC
]);
138 UPT_SET(uml_regs
, UESP
, jmpbuf
->__jmpbuf
[JB_SP
]);
139 UPT_SET(uml_regs
, EBP
, jmpbuf
->__jmpbuf
[JB_BP
]);