1 /* Fetch live process registers from TID.
2 Copyright (C) 2013 Red Hat, Inc.
3 This file is part of elfutils.
4
5 This file is free software; you can redistribute it and/or modify
6 it under the terms of either
7
8 * the GNU Lesser General Public License as published by the Free
9 Software Foundation; either version 3 of the License, or (at
10 your option) any later version
11
12 or
13
14 * the GNU General Public License as published by the Free
15 Software Foundation; either version 2 of the License, or (at
16 your option) any later version
17
18 or both in parallel, as here.
19
20 elfutils is distributed in the hope that it will be useful, but
21 WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 General Public License for more details.
24
25 You should have received copies of the GNU General Public License and
26 the GNU Lesser General Public License along with this program. If
27 not, see <http://www.gnu.org/licenses/>. */
28
29 #ifdef HAVE_CONFIG_H
30 # include <config.h>
31 #endif
32
33 #if (defined __i386__ || defined __x86_64__) && defined(__linux__)
34 # include <sys/types.h>
35 # include <sys/user.h>
36 # include <sys/ptrace.h>
37 #endif
38
39 #define BACKEND i386_
40 #include "libebl_CPU.h"
41
42 bool
i386_set_initial_registers_tid(pid_t tid,ebl_tid_registers_t * setfunc,void * arg)43 i386_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
44 ebl_tid_registers_t *setfunc __attribute__ ((unused)),
45 void *arg __attribute__ ((unused)))
46 {
47 #if (!defined __i386__ && !defined __x86_64__) || !defined(__linux__)
48 return false;
49 #else /* __i386__ || __x86_64__ */
50 struct user_regs_struct user_regs;
51 if (ptrace (PTRACE_GETREGS, tid, NULL, &user_regs) != 0)
52 return false;
53 Dwarf_Word dwarf_regs[9];
54 # if defined __i386__
55 dwarf_regs[0] = user_regs.eax;
56 dwarf_regs[1] = user_regs.ecx;
57 dwarf_regs[2] = user_regs.edx;
58 dwarf_regs[3] = user_regs.ebx;
59 dwarf_regs[4] = user_regs.esp;
60 dwarf_regs[5] = user_regs.ebp;
61 dwarf_regs[6] = user_regs.esi;
62 dwarf_regs[7] = user_regs.edi;
63 dwarf_regs[8] = user_regs.eip;
64 # elif defined __x86_64__
65 dwarf_regs[0] = user_regs.rax;
66 dwarf_regs[1] = user_regs.rcx;
67 dwarf_regs[2] = user_regs.rdx;
68 dwarf_regs[3] = user_regs.rbx;
69 dwarf_regs[4] = user_regs.rsp;
70 dwarf_regs[5] = user_regs.rbp;
71 dwarf_regs[6] = user_regs.rsi;
72 dwarf_regs[7] = user_regs.rdi;
73 dwarf_regs[8] = user_regs.rip;
74 # else /* (__i386__ || __x86_64__) && (!__i386__ && !__x86_64__) */
75 # error "source file error, it cannot happen"
76 # endif /* (__i386__ || __x86_64__) && (!__i386__ && !__x86_64__) */
77 return setfunc (0, 9, dwarf_regs, arg);
78 #endif /* __i386__ || __x86_64__ */
79 }
80