From 5a79859ae0f35d25c67a03e82bf0c80592f16a39 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Thu, 12 Feb 2015 13:08:27 +0100 Subject: s390: remove 31 bit support Remove the 31 bit support in order to reduce maintenance cost and effectively remove dead code. Since a couple of years there is no distribution left that comes with a 31 bit kernel. The 31 bit kernel also has been broken since more than a year before anybody noticed. In addition I added a removal warning to the kernel shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning message") which let everybody know about the plan to remove 31 bit code. We didn't get any response. Given that the last 31 bit only machine was introduced in 1999 let's remove the code. Anybody with 31 bit user space code can still use the compat mode. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/ptrace.c | 46 +++++----------------------------------------- 1 file changed, 5 insertions(+), 41 deletions(-) (limited to 'arch/s390/kernel/ptrace.c') diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index eabfb4594517..d363c9c322a1 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -44,7 +44,6 @@ void update_cr_regs(struct task_struct *task) struct thread_struct *thread = &task->thread; struct per_regs old, new; -#ifdef CONFIG_64BIT /* Take care of the enable/disable of transactional execution. */ if (MACHINE_HAS_TE || MACHINE_HAS_VX) { unsigned long cr, cr_new; @@ -80,7 +79,6 @@ void update_cr_regs(struct task_struct *task) __ctl_load(cr_new, 2, 2); } } -#endif /* Copy user specified PER registers */ new.control = thread->per_user.control; new.start = thread->per_user.start; @@ -93,10 +91,8 @@ void update_cr_regs(struct task_struct *task) new.control |= PER_EVENT_BRANCH; else new.control |= PER_EVENT_IFETCH; -#ifdef CONFIG_64BIT new.control |= PER_CONTROL_SUSPENSION; new.control |= PER_EVENT_TRANSACTION_END; -#endif if (test_tsk_thread_flag(task, TIF_UPROBE_SINGLESTEP)) new.control |= PER_EVENT_IFETCH; new.start = 0; @@ -146,11 +142,7 @@ void ptrace_disable(struct task_struct *task) task->thread.per_flags = 0; } -#ifndef CONFIG_64BIT -# define __ADDR_MASK 3 -#else -# define __ADDR_MASK 7 -#endif +#define __ADDR_MASK 7 static inline unsigned long __peek_user_per(struct task_struct *child, addr_t addr) @@ -223,7 +215,6 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr) * access registers are stored in the thread structure */ offset = addr - (addr_t) &dummy->regs.acrs; -#ifdef CONFIG_64BIT /* * Very special case: old & broken 64 bit gdb reading * from acrs[15]. Result is a 64 bit value. Read the @@ -232,8 +223,7 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr) if (addr == (addr_t) &dummy->regs.acrs[15]) tmp = ((unsigned long) child->thread.acrs[15]) << 32; else -#endif - tmp = *(addr_t *)((addr_t) &child->thread.acrs + offset); + tmp = *(addr_t *)((addr_t) &child->thread.acrs + offset); } else if (addr == (addr_t) &dummy->regs.orig_gpr2) { /* @@ -261,12 +251,10 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr) * or the child->thread.vxrs array */ offset = addr - (addr_t) &dummy->regs.fp_regs.fprs; -#ifdef CONFIG_64BIT if (child->thread.vxrs) tmp = *(addr_t *) ((addr_t) child->thread.vxrs + 2*offset); else -#endif tmp = *(addr_t *) ((addr_t) &child->thread.fp_regs.fprs + offset); @@ -293,11 +281,9 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data) * an alignment of 4. Programmers from hell... */ mask = __ADDR_MASK; -#ifdef CONFIG_64BIT if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs && addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2) mask = 3; -#endif if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK) return -EIO; @@ -370,7 +356,6 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data) * access registers are stored in the thread structure */ offset = addr - (addr_t) &dummy->regs.acrs; -#ifdef CONFIG_64BIT /* * Very special case: old & broken 64 bit gdb writing * to acrs[15] with a 64 bit value. Ignore the lower @@ -380,8 +365,7 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data) if (addr == (addr_t) &dummy->regs.acrs[15]) child->thread.acrs[15] = (unsigned int) (data >> 32); else -#endif - *(addr_t *)((addr_t) &child->thread.acrs + offset) = data; + *(addr_t *)((addr_t) &child->thread.acrs + offset) = data; } else if (addr == (addr_t) &dummy->regs.orig_gpr2) { /* @@ -411,12 +395,10 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data) * or the child->thread.vxrs array */ offset = addr - (addr_t) &dummy->regs.fp_regs.fprs; -#ifdef CONFIG_64BIT if (child->thread.vxrs) *(addr_t *)((addr_t) child->thread.vxrs + 2*offset) = data; else -#endif *(addr_t *)((addr_t) &child->thread.fp_regs.fprs + offset) = data; @@ -441,11 +423,9 @@ static int poke_user(struct task_struct *child, addr_t addr, addr_t data) * an alignment of 4. Programmers from hell indeed... */ mask = __ADDR_MASK; -#ifdef CONFIG_64BIT if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs && addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2) mask = 3; -#endif if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK) return -EIO; @@ -649,12 +629,10 @@ static u32 __peek_user_compat(struct task_struct *child, addr_t addr) * or the child->thread.vxrs array */ offset = addr - (addr_t) &dummy32->regs.fp_regs.fprs; -#ifdef CONFIG_64BIT if (child->thread.vxrs) tmp = *(__u32 *) ((addr_t) child->thread.vxrs + 2*offset); else -#endif tmp = *(__u32 *) ((addr_t) &child->thread.fp_regs.fprs + offset); @@ -776,12 +754,10 @@ static int __poke_user_compat(struct task_struct *child, * or the child->thread.vxrs array */ offset = addr - (addr_t) &dummy32->regs.fp_regs.fprs; -#ifdef CONFIG_64BIT if (child->thread.vxrs) *(__u32 *)((addr_t) child->thread.vxrs + 2*offset) = tmp; else -#endif *(__u32 *)((addr_t) &child->thread.fp_regs.fprs + offset) = tmp; @@ -979,16 +955,13 @@ static int s390_fpregs_get(struct task_struct *target, if (target == current) { save_fp_ctl(&target->thread.fp_regs.fpc); save_fp_regs(target->thread.fp_regs.fprs); - } -#ifdef CONFIG_64BIT - else if (target->thread.vxrs) { + } else if (target->thread.vxrs) { int i; for (i = 0; i < __NUM_VXRS_LOW; i++) target->thread.fp_regs.fprs[i] = *(freg_t *)(target->thread.vxrs + i); } -#endif return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &target->thread.fp_regs, 0, -1); } @@ -1026,23 +999,18 @@ static int s390_fpregs_set(struct task_struct *target, if (target == current) { restore_fp_ctl(&target->thread.fp_regs.fpc); restore_fp_regs(target->thread.fp_regs.fprs); - } -#ifdef CONFIG_64BIT - else if (target->thread.vxrs) { + } else if (target->thread.vxrs) { int i; for (i = 0; i < __NUM_VXRS_LOW; i++) *(freg_t *)(target->thread.vxrs + i) = target->thread.fp_regs.fprs[i]; } -#endif } return rc; } -#ifdef CONFIG_64BIT - static int s390_last_break_get(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, @@ -1182,8 +1150,6 @@ static int s390_vxrs_high_set(struct task_struct *target, return rc; } -#endif - static int s390_system_call_get(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, @@ -1229,7 +1195,6 @@ static const struct user_regset s390_regsets[] = { .get = s390_system_call_get, .set = s390_system_call_set, }, -#ifdef CONFIG_64BIT { .core_note_type = NT_S390_LAST_BREAK, .n = 1, @@ -1262,7 +1227,6 @@ static const struct user_regset s390_regsets[] = { .get = s390_vxrs_high_get, .set = s390_vxrs_high_set, }, -#endif }; static const struct user_regset_view user_s390_view = { -- cgit v1.2.3