From 2991be725260d6fec11691a6138b9d71de949956 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 27 Sep 2006 17:07:07 +0900 Subject: sh: Fixup __strnlen_user() behaviour. Drop TIF_USERSPACE and add addr_limit to the thread_info struct. Subsequently, use that for address checking in strnlen_user() to ward off bogus -EFAULTs. Make __strnlen_user() return 0 on exception, rather than -EFAULT. Signed-off-by: Paul Mundt --- arch/sh/kernel/process.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/sh/kernel/process.c') diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c index f203131..4a32550 100644 --- a/arch/sh/kernel/process.c +++ b/arch/sh/kernel/process.c @@ -263,6 +263,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp, unsigned long unused, struct task_struct *p, struct pt_regs *regs) { + struct thread_info *ti = task_thread_info(p); struct pt_regs *childregs; #if defined(CONFIG_SH_FPU) struct task_struct *tsk = current; @@ -277,8 +278,10 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp, if (user_mode(regs)) { childregs->regs[15] = usp; + ti->addr_limit = USER_DS; } else { childregs->regs[15] = (unsigned long)task_stack_page(p) + THREAD_SIZE; + ti->addr_limit = KERNEL_DS; } if (clone_flags & CLONE_SETTLS) { childregs->gbr = childregs->regs[0]; -- cgit v1.1 From a2d1a5fae6296c2a3ac1aaa982c95464c46c0585 Mon Sep 17 00:00:00 2001 From: Yoshinori Sato Date: Wed, 27 Sep 2006 17:25:07 +0900 Subject: sh: __addr_ok() and other misc nommu fixups. A few more outstanding nommu fixups.. Signed-off-by: Yoshinori Sato Signed-off-by: Paul Mundt --- arch/sh/kernel/process.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) (limited to 'arch/sh/kernel/process.c') diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c index 4a32550..c4aa687 100644 --- a/arch/sh/kernel/process.c +++ b/arch/sh/kernel/process.c @@ -302,9 +302,11 @@ ubc_set_tracing(int asid, unsigned long pc) { ctrl_outl(pc, UBC_BARA); +#ifdef CONFIG_MMU /* We don't have any ASID settings for the SH-2! */ if (cpu_data->type != CPU_SH7604) ctrl_outb(asid, UBC_BASRA); +#endif ctrl_outl(0, UBC_BAMRA); @@ -347,6 +349,7 @@ struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *ne } #endif +#ifdef CONFIG_MMU /* * Restore the kernel mode register * k7 (r7_bank1) @@ -354,19 +357,21 @@ struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *ne asm volatile("ldc %0, r7_bank" : /* no output */ : "r" (task_thread_info(next))); +#endif -#ifdef CONFIG_MMU /* If no tasks are using the UBC, we're done */ if (ubc_usercnt == 0) /* If no tasks are using the UBC, we're done */; else if (next->thread.ubc_pc && next->mm) { - ubc_set_tracing(next->mm->context & MMU_CONTEXT_ASID_MASK, - next->thread.ubc_pc); + int asid = 0; +#ifdef CONFIG_MMU + asid |= next->mm->context & MMU_CONTEXT_ASID_MASK; +#endif + ubc_set_tracing(asid, next->thread.ubc_pc); } else { ctrl_outw(0, UBC_BBRA); ctrl_outw(0, UBC_BBRB); } -#endif return prev; } -- cgit v1.1 From e5723e0eeb2dc16629e86d66785024ead9169000 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 27 Sep 2006 17:38:11 +0900 Subject: sh: Add support for SH7706/SH7710/SH7343 CPUs. This adds support for the aforementioned CPU subtypes, and cleans up some build issues encountered as a result. Signed-off-by: Paul Mundt --- arch/sh/kernel/process.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/sh/kernel/process.c') diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c index c4aa687..2167746 100644 --- a/arch/sh/kernel/process.c +++ b/arch/sh/kernel/process.c @@ -310,7 +310,7 @@ ubc_set_tracing(int asid, unsigned long pc) ctrl_outl(0, UBC_BAMRA); - if (cpu_data->type == CPU_SH7729) { + if (cpu_data->type == CPU_SH7729 || cpu_data->type == CPU_SH7710) { ctrl_outw(BBR_INST | BBR_READ | BBR_CPU, UBC_BBRA); ctrl_outl(BRCR_PCBA | BRCR_PCTE, UBC_BRCR); } else { -- cgit v1.1 From 9d549a7d8ef71f684a35cf1e438543957cf81d12 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 27 Sep 2006 18:26:05 +0900 Subject: sh: Update kexec support for API changes. This was falling a bit behind.. Signed-off-by: Paul Mundt --- arch/sh/kernel/process.c | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'arch/sh/kernel/process.c') diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c index 2167746..630ec1a 100644 --- a/arch/sh/kernel/process.c +++ b/arch/sh/kernel/process.c @@ -81,16 +81,6 @@ void cpu_idle(void) void machine_restart(char * __unused) { - -#ifdef CONFIG_KEXEC - struct kimage *image; - image = xchg(&kexec_image, 0); - if (image) { - machine_shutdown(); - machine_kexec(image); - } -#endif - /* SR.BL=1 and invoke address error to let CPU reset (manual reset) */ asm volatile("ldc %0, sr\n\t" "mov.l @%1, %0" : : "r" (0x10000000), "r" (0x80000001)); -- cgit v1.1 From 19f9a34f87c48bbd270d617d1c986d0c23866a1a Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 27 Sep 2006 18:33:49 +0900 Subject: sh: Initial vsyscall page support. This implements initial support for the vsyscall page on SH. At the moment we leave it configurable due to having nommu to support from the same code base. We hook it up for the signal trampoline return at present, with more to be added later, once uClibc catches up. Signed-off-by: Paul Mundt --- arch/sh/kernel/process.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/sh/kernel/process.c') diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c index 630ec1a..0b1d5dd 100644 --- a/arch/sh/kernel/process.c +++ b/arch/sh/kernel/process.c @@ -355,7 +355,7 @@ struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *ne else if (next->thread.ubc_pc && next->mm) { int asid = 0; #ifdef CONFIG_MMU - asid |= next->mm->context & MMU_CONTEXT_ASID_MASK; + asid |= next->mm->context.id & MMU_CONTEXT_ASID_MASK; #endif ubc_set_tracing(asid, next->thread.ubc_pc); } else { -- cgit v1.1