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6291ad77 PM |
1 | /* |
2 | * SPARC specific CPU ABI and functions for linux-user | |
3 | * | |
4 | * Copyright (C) 2003 Thomas M. Ogrisegg <tom@fnord.at> | |
5 | * Copyright (C) 2003-2005 Fabrice Bellard | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
1c79145f | 10 | * version 2.1 of the License, or (at your option) any later version. |
6291ad77 PM |
11 | * |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
55c5063c MA |
20 | #ifndef SPARC_TARGET_CPU_H |
21 | #define SPARC_TARGET_CPU_H | |
6291ad77 | 22 | |
608999d1 RH |
23 | static inline void cpu_clone_regs_child(CPUSPARCState *env, target_ulong newsp, |
24 | unsigned flags) | |
6291ad77 | 25 | { |
2ad983e0 RH |
26 | /* |
27 | * After cpu_copy, env->regwptr is pointing into the old env. | |
28 | * Update the new cpu to use its own register window. | |
29 | */ | |
30 | env->regwptr = env->regbase + (env->cwp * 16); | |
31 | ||
6291ad77 | 32 | if (newsp) { |
2ad983e0 RH |
33 | /* When changing stacks, do it with clean register windows. */ |
34 | #ifdef TARGET_SPARC64 | |
35 | env->cansave = env->nwindows - 2; | |
36 | env->cleanwin = env->nwindows - 2; | |
37 | env->canrestore = 0; | |
38 | #else | |
39 | env->wim = 1 << env->cwp; | |
40 | #endif | |
41 | /* ??? The kernel appears to copy one stack frame to the new stack. */ | |
42 | /* ??? The kernel force aligns the new stack. */ | |
43 | env->regwptr[WREG_SP] = newsp; | |
6291ad77 | 44 | } |
2ad983e0 RH |
45 | |
46 | if (flags & CLONE_VM) { | |
47 | /* | |
48 | * Syscall return for clone child: %o0 = 0 and clear CF since this | |
49 | * counts as a success return value. Advance the PC past the syscall. | |
50 | * For fork child, all of this happens in cpu_loop, and we must not | |
51 | * do the pc advance twice. | |
52 | */ | |
53 | env->regwptr[WREG_O0] = 0; | |
f5147c93 | 54 | #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) |
2ad983e0 | 55 | env->xcc &= ~PSR_CARRY; |
f5147c93 | 56 | #else |
2ad983e0 | 57 | env->psr &= ~PSR_CARRY; |
f5147c93 | 58 | #endif |
2ad983e0 RH |
59 | env->pc = env->npc; |
60 | env->npc = env->npc + 4; | |
61 | } | |
62 | ||
63 | /* Set the second return value for the child: %o1 = 1. */ | |
64 | env->regwptr[WREG_O1] = 1; | |
6291ad77 PM |
65 | } |
66 | ||
07a6ecf4 RH |
67 | static inline void cpu_clone_regs_parent(CPUSPARCState *env, unsigned flags) |
68 | { | |
2ad983e0 RH |
69 | /* Set the second return value for the parent: %o1 = 0. */ |
70 | env->regwptr[WREG_O1] = 0; | |
07a6ecf4 RH |
71 | } |
72 | ||
f5147c93 PM |
73 | static inline void cpu_set_tls(CPUSPARCState *env, target_ulong newtls) |
74 | { | |
75 | env->gregs[7] = newtls; | |
76 | } | |
6291ad77 | 77 | |
9850f9f6 LV |
78 | static inline abi_ulong get_sp_from_cpustate(CPUSPARCState *state) |
79 | { | |
083244d3 | 80 | return state->regwptr[WREG_SP]; |
9850f9f6 | 81 | } |
083244d3 | 82 | |
6291ad77 | 83 | #endif |