process.c (e82a82c19f4272ea5437cc76e5711b98e2ee6223) process.c (432c6bacbd0c16ec210c43da411ccc3855c4c010)
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994 - 1999, 2000 by Ralf Baechle and others.
7 * Copyright (C) 2005, 2006 by Ralf Baechle (ralf@linux-mips.org)
8 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.

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25#include <linux/completion.h>
26#include <linux/kallsyms.h>
27#include <linux/random.h>
28#include <linux/prctl.h>
29
30#include <asm/asm.h>
31#include <asm/bootinfo.h>
32#include <asm/cpu.h>
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994 - 1999, 2000 by Ralf Baechle and others.
7 * Copyright (C) 2005, 2006 by Ralf Baechle (ralf@linux-mips.org)
8 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.

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25#include <linux/completion.h>
26#include <linux/kallsyms.h>
27#include <linux/random.h>
28#include <linux/prctl.h>
29
30#include <asm/asm.h>
31#include <asm/bootinfo.h>
32#include <asm/cpu.h>
33#include <asm/dsemul.h>
33#include <asm/dsp.h>
34#include <asm/fpu.h>
35#include <asm/msa.h>
36#include <asm/pgtable.h>
37#include <asm/mipsregs.h>
38#include <asm/processor.h>
39#include <asm/reg.h>
40#include <asm/uaccess.h>

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63
64 /* New thread loses kernel privileges. */
65 status = regs->cp0_status & ~(ST0_CU0|ST0_CU1|ST0_FR|KU_MASK);
66 status |= KU_USER;
67 regs->cp0_status = status;
68 lose_fpu(0);
69 clear_thread_flag(TIF_MSA_CTX_LIVE);
70 clear_used_math();
34#include <asm/dsp.h>
35#include <asm/fpu.h>
36#include <asm/msa.h>
37#include <asm/pgtable.h>
38#include <asm/mipsregs.h>
39#include <asm/processor.h>
40#include <asm/reg.h>
41#include <asm/uaccess.h>

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64
65 /* New thread loses kernel privileges. */
66 status = regs->cp0_status & ~(ST0_CU0|ST0_CU1|ST0_FR|KU_MASK);
67 status |= KU_USER;
68 regs->cp0_status = status;
69 lose_fpu(0);
70 clear_thread_flag(TIF_MSA_CTX_LIVE);
71 clear_used_math();
72 atomic_set(&current->thread.bd_emu_frame, BD_EMUFRAME_NONE);
71 init_dsp();
72 regs->cp0_epc = pc;
73 regs->regs[29] = sp;
74}
75
73 init_dsp();
74 regs->cp0_epc = pc;
75 regs->regs[29] = sp;
76}
77
78void exit_thread(struct task_struct *tsk)
79{
80 /*
81 * User threads may have allocated a delay slot emulation frame.
82 * If so, clean up that allocation.
83 */
84 if (!(current->flags & PF_KTHREAD))
85 dsemul_thread_cleanup(tsk);
86}
87
76int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
77{
78 /*
79 * Save any process state which is live in hardware registers to the
80 * parent context prior to duplication. This prevents the new child
81 * state becoming stale if the parent is preempted before copy_thread()
82 * gets a chance to save the parent's live hardware registers to the
83 * child context.

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154 clear_tsk_thread_flag(p, TIF_USEDFPU);
155 clear_tsk_thread_flag(p, TIF_USEDMSA);
156 clear_tsk_thread_flag(p, TIF_MSA_CTX_LIVE);
157
158#ifdef CONFIG_MIPS_MT_FPAFF
159 clear_tsk_thread_flag(p, TIF_FPUBOUND);
160#endif /* CONFIG_MIPS_MT_FPAFF */
161
88int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
89{
90 /*
91 * Save any process state which is live in hardware registers to the
92 * parent context prior to duplication. This prevents the new child
93 * state becoming stale if the parent is preempted before copy_thread()
94 * gets a chance to save the parent's live hardware registers to the
95 * child context.

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166 clear_tsk_thread_flag(p, TIF_USEDFPU);
167 clear_tsk_thread_flag(p, TIF_USEDMSA);
168 clear_tsk_thread_flag(p, TIF_MSA_CTX_LIVE);
169
170#ifdef CONFIG_MIPS_MT_FPAFF
171 clear_tsk_thread_flag(p, TIF_FPUBOUND);
172#endif /* CONFIG_MIPS_MT_FPAFF */
173
174 atomic_set(&p->thread.bd_emu_frame, BD_EMUFRAME_NONE);
175
162 if (clone_flags & CLONE_SETTLS)
163 ti->tp_value = regs->regs[7];
164
165 return 0;
166}
167
168#ifdef CONFIG_CC_STACKPROTECTOR
169#include <linux/stackprotector.h>

--- 485 unchanged lines hidden --- 		176 if (clone_flags & CLONE_SETTLS)
177 ti->tp_value = regs->regs[7];
178
179 return 0;
180}
181
182#ifdef CONFIG_CC_STACKPROTECTOR
183#include <linux/stackprotector.h>

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