xref: /openbmc/qemu/linux-user/i386/target_cpu.h (revision 2b74dd91)
1 /*
2  * i386 specific CPU ABI and functions for linux-user
3  *
4  *  Copyright (c) 2003 Fabrice Bellard
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #ifndef I386_TARGET_CPU_H
21 #define I386_TARGET_CPU_H
22 
23 static inline void cpu_clone_regs_child(CPUX86State *env, target_ulong newsp,
24                                         unsigned flags)
25 {
26     if (newsp) {
27         env->regs[R_ESP] = newsp;
28     }
29     env->regs[R_EAX] = 0;
30 }
31 
32 static inline void cpu_clone_regs_parent(CPUX86State *env, unsigned flags)
33 {
34 }
35 
36 abi_long do_arch_prctl(CPUX86State *env, int code, abi_ulong addr);
37 
38 #if defined(TARGET_ABI32)
39 abi_long do_set_thread_area(CPUX86State *env, abi_ulong ptr);
40 
41 static inline void cpu_set_tls(CPUX86State *env, target_ulong newtls)
42 {
43     do_set_thread_area(env, newtls);
44     cpu_x86_load_seg(env, R_GS, env->segs[R_GS].selector);
45 }
46 #else
47 static inline void cpu_set_tls(CPUX86State *env, target_ulong newtls)
48 {
49     do_arch_prctl(env, TARGET_ARCH_SET_FS, newtls);
50 }
51 #endif /* defined(TARGET_ABI32) */
52 
53 static inline abi_ulong get_sp_from_cpustate(CPUX86State *state)
54 {
55     return state->regs[R_ESP];
56 }
57 #endif /* I386_TARGET_CPU_H */
58