From: Paul Mundt Date: Sun, 21 Sep 2008 10:04:55 +0000 (+0900) Subject: sh: Add FPU registers to regset interface. X-Git-Tag: v2.6.28-rc1~99^2~26 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=e7ab3cd251926d57ee11d7d320e8fb42c882ad22;p=linux-2.6-omap-h63xx.git sh: Add FPU registers to regset interface. Signed-off-by: Paul Mundt --- diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 38a5a9edb67..71be7ff5c77 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -23,7 +23,7 @@ config SUPERH32 def_bool !SUPERH64 select HAVE_KPROBES select HAVE_KRETPROBES - select HAVE_ARCH_TRACEHOOK if !SH_FPU + select HAVE_ARCH_TRACEHOOK select HAVE_FTRACE config SUPERH64 diff --git a/arch/sh/include/asm/elf.h b/arch/sh/include/asm/elf.h index 6b2cec80fd1..4da3a0b1091 100644 --- a/arch/sh/include/asm/elf.h +++ b/arch/sh/include/asm/elf.h @@ -108,10 +108,10 @@ typedef struct user_fpu_struct elf_fpregset_t; #define elf_check_fdpic(x) ((x)->e_flags & EF_SH_FDPIC) #define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC) -#if defined(CONFIG_SUPERH32) && !defined(CONFIG_SH_FPU) +#ifdef CONFIG_SUPERH32 /* - * Enable dump using regset for general purpose registers, use this as - * the default once the FPU registers are moved over also. + * Enable dump using regset. + * This covers all of general/DSP/FPU regs. */ #define CORE_DUMP_USE_REGSET #endif diff --git a/arch/sh/include/asm/fpu.h b/arch/sh/include/asm/fpu.h index 91462fea150..1d3aee04b5c 100644 --- a/arch/sh/include/asm/fpu.h +++ b/arch/sh/include/asm/fpu.h @@ -30,8 +30,15 @@ static inline void save_fpu(struct task_struct *tsk, struct pt_regs *regs) } #endif +struct user_regset; + extern int do_fpu_inst(unsigned short, struct pt_regs *); +extern int fpregs_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf); + static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs) { preempt_disable(); @@ -50,6 +57,18 @@ static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs) preempt_enable(); } +static inline int init_fpu(struct task_struct *tsk) +{ + if (tsk_used_math(tsk)) { + if ((boot_cpu_data.flags & CPU_HAS_FPU) && tsk == current) + unlazy_fpu(tsk, task_pt_regs(tsk)); + return 0; + } + + set_stopped_child_used_math(tsk); + return 0; +} + #endif /* __ASSEMBLY__ */ #endif /* __ASM_SH_FPU_H */ diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c index 7b013aa8c43..b965f0282c7 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 #include @@ -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 0f44f2b51a6..29ca09d24ef 100644 --- a/arch/sh/kernel/ptrace_32.c +++ b/arch/sh/kernel/ptrace_32.c @@ -32,6 +32,7 @@ #include #include #include +#include /* * 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,