diff options
Diffstat (limited to 'arch/sh/kernel')
| -rw-r--r-- | arch/sh/kernel/process_32.c | 14 | ||||
| -rw-r--r-- | arch/sh/kernel/ptrace_32.c | 76 |
2 files changed, 85 insertions, 5 deletions
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c index 7b013aa8c43f..b965f0282c7d 100644 --- a/arch/sh/kernel/process_32.c +++ b/arch/sh/kernel/process_32.c @@ -7,7 +7,11 @@ * * SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima * Copyright (C) 2006 Lineo Solutions Inc. support SH4A UBC - * Copyright (C) 2002 - 2007 Paul Mundt + * Copyright (C) 2002 - 2008 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. */ #include <linux/module.h> #include <linux/mm.h> @@ -222,10 +226,10 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) struct task_struct *tsk = current; fpvalid = !!tsk_used_math(tsk); - if (fpvalid) { - unlazy_fpu(tsk, regs); - memcpy(fpu, &tsk->thread.fpu.hard, sizeof(*fpu)); - } + if (fpvalid) + fpvalid = !fpregs_get(tsk, NULL, 0, + sizeof(struct user_fpu_struct), + fpu, NULL); #endif return fpvalid; diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c index 0f44f2b51a60..29ca09d24ef8 100644 --- a/arch/sh/kernel/ptrace_32.c +++ b/arch/sh/kernel/ptrace_32.c @@ -32,6 +32,7 @@ #include <asm/processor.h> #include <asm/mmu_context.h> #include <asm/syscalls.h> +#include <asm/fpu.h> /* * This routine will get a word off of the process kernel stack. @@ -145,6 +146,54 @@ static int genregs_set(struct task_struct *target, return ret; } +#ifdef CONFIG_SH_FPU +int fpregs_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + int ret; + + ret = init_fpu(target); + if (ret) + return ret; + + if ((boot_cpu_data.flags & CPU_HAS_FPU)) + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.fpu.hard, 0, -1); + + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.fpu.soft, 0, -1); +} + +static int fpregs_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + + ret = init_fpu(target); + if (ret) + return ret; + + set_stopped_child_used_math(target); + + if ((boot_cpu_data.flags & CPU_HAS_FPU)) + return user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.fpu.hard, 0, -1); + + return user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.fpu.soft, 0, -1); +} + +static int fpregs_active(struct task_struct *target, + const struct user_regset *regset) +{ + return tsk_used_math(target) ? regset->n : 0; +} +#endif + #ifdef CONFIG_SH_DSP static int dspregs_get(struct task_struct *target, const struct user_regset *regset, @@ -194,6 +243,9 @@ static int dspregs_active(struct task_struct *target, */ enum sh_regset { REGSET_GENERAL, +#ifdef CONFIG_SH_FPU + REGSET_FPU, +#endif #ifdef CONFIG_SH_DSP REGSET_DSP, #endif @@ -214,6 +266,18 @@ static const struct user_regset sh_regsets[] = { .set = genregs_set, }, +#ifdef CONFIG_SH_FPU + [REGSET_FPU] = { + .core_note_type = NT_PRFPREG, + .n = sizeof(struct user_fpu_struct) / sizeof(long), + .size = sizeof(long), + .align = sizeof(long), + .get = fpregs_get, + .set = fpregs_set, + .active = fpregs_active, + }, +#endif + #ifdef CONFIG_SH_DSP [REGSET_DSP] = { .n = sizeof(struct pt_dspregs) / sizeof(long), @@ -304,6 +368,18 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) REGSET_GENERAL, 0, sizeof(struct pt_regs), (const void __user *)data); +#ifdef CONFIG_SH_FPU + case PTRACE_GETFPREGS: + return copy_regset_to_user(child, &user_sh_native_view, + REGSET_FPU, + 0, sizeof(struct user_fpu_struct), + (void __user *)data); + case PTRACE_SETFPREGS: + return copy_regset_from_user(child, &user_sh_native_view, + REGSET_FPU, + 0, sizeof(struct user_fpu_struct), + (const void __user *)data); +#endif #ifdef CONFIG_SH_DSP case PTRACE_GETDSPREGS: return copy_regset_to_user(child, &user_sh_native_view, |