diff options
| -rw-r--r-- | arch/s390/include/asm/compat.h | 19 | ||||
| -rw-r--r-- | arch/s390/kernel/process.c | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/ptrace.c | 12 | ||||
| -rw-r--r-- | arch/s390/kernel/signal.c | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/vdso.c | 4 | ||||
| -rw-r--r-- | arch/s390/mm/fault.c | 3 | ||||
| -rw-r--r-- | arch/s390/mm/mmap.c | 11 |
7 files changed, 36 insertions, 19 deletions
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h index de065b32381..01a08020bc0 100644 --- a/arch/s390/include/asm/compat.h +++ b/arch/s390/include/asm/compat.h @@ -5,6 +5,7 @@ */ #include <linux/types.h> #include <linux/sched.h> +#include <linux/thread_info.h> #define PSW32_MASK_PER 0x40000000UL #define PSW32_MASK_DAT 0x04000000UL @@ -163,12 +164,28 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr) return (u32)(unsigned long)uptr; } +#ifdef CONFIG_COMPAT + +static inline int is_compat_task(void) +{ + return test_thread_flag(TIF_31BIT); +} + +#else + +static inline int is_compat_task(void) +{ + return 0; +} + +#endif + static inline void __user *compat_alloc_user_space(long len) { unsigned long stack; stack = KSTK_ESP(current); - if (test_thread_flag(TIF_31BIT)) + if (is_compat_task()) stack &= 0x7fffffffUL; return (void __user *) (stack - len); } diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index a3acd8e60af..355f7a30c3f 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -32,6 +32,7 @@ #include <linux/elfcore.h> #include <linux/kernel_stat.h> #include <linux/syscalls.h> +#include <asm/compat.h> #include <asm/uaccess.h> #include <asm/pgtable.h> #include <asm/system.h> @@ -204,7 +205,7 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp, save_fp_regs(&p->thread.fp_regs); /* Set a new TLS ? */ if (clone_flags & CLONE_SETTLS) { - if (test_thread_flag(TIF_31BIT)) { + if (is_compat_task()) { p->thread.acrs[0] = (unsigned int) regs->gprs[6]; } else { p->thread.acrs[0] = (unsigned int)(regs->gprs[6] >> 32); diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index 75c496f4f16..99eef179e90 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -36,7 +36,7 @@ #include <linux/elf.h> #include <linux/regset.h> #include <linux/tracehook.h> - +#include <linux/compat.h> #include <asm/segment.h> #include <asm/page.h> #include <asm/pgtable.h> @@ -69,7 +69,7 @@ FixPerRegisters(struct task_struct *task) if (per_info->single_step) { per_info->control_regs.bits.starting_addr = 0; #ifdef CONFIG_COMPAT - if (test_thread_flag(TIF_31BIT)) + if (is_compat_task()) per_info->control_regs.bits.ending_addr = 0x7fffffffUL; else #endif @@ -482,8 +482,7 @@ static int peek_user_compat(struct task_struct *child, { __u32 tmp; - if (!test_thread_flag(TIF_31BIT) || - (addr & 3) || addr > sizeof(struct user) - 3) + if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user) - 3) return -EIO; tmp = __peek_user_compat(child, addr); @@ -584,8 +583,7 @@ static int __poke_user_compat(struct task_struct *child, static int poke_user_compat(struct task_struct *child, addr_t addr, addr_t data) { - if (!test_thread_flag(TIF_31BIT) || - (addr & 3) || addr > sizeof(struct user32) - 3) + if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user32) - 3) return -EIO; return __poke_user_compat(child, addr, data); @@ -660,7 +658,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs) } if (unlikely(current->audit_context)) - audit_syscall_entry(test_thread_flag(TIF_31BIT) ? + audit_syscall_entry(is_compat_task() ? AUDIT_ARCH_S390 : AUDIT_ARCH_S390X, regs->gprs[2], regs->orig_gpr2, regs->gprs[3], regs->gprs[4], diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c index 3cf74c3ccb6..062bd64e65f 100644 --- a/arch/s390/kernel/signal.c +++ b/arch/s390/kernel/signal.c @@ -26,6 +26,7 @@ #include <linux/binfmts.h> #include <linux/tracehook.h> #include <linux/syscalls.h> +#include <linux/compat.h> #include <asm/ucontext.h> #include <asm/uaccess.h> #include <asm/lowcore.h> @@ -482,7 +483,7 @@ void do_signal(struct pt_regs *regs) /* Whee! Actually deliver the signal. */ int ret; #ifdef CONFIG_COMPAT - if (test_thread_flag(TIF_31BIT)) { + if (is_compat_task()) { ret = handle_signal32(signr, &ka, &info, oldset, regs); } else diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c index 7b76ee4fb16..45e1708b70f 100644 --- a/arch/s390/kernel/vdso.c +++ b/arch/s390/kernel/vdso.c @@ -22,7 +22,7 @@ #include <linux/elf.h> #include <linux/security.h> #include <linux/bootmem.h> - +#include <linux/compat.h> #include <asm/pgtable.h> #include <asm/system.h> #include <asm/processor.h> @@ -214,7 +214,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) vdso_pagelist = vdso64_pagelist; vdso_pages = vdso64_pages; #ifdef CONFIG_COMPAT - if (test_thread_flag(TIF_31BIT)) { + if (is_compat_task()) { vdso_pagelist = vdso32_pagelist; vdso_pages = vdso32_pages; } diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 833e8366c35..220a152c836 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -19,6 +19,7 @@ #include <linux/ptrace.h> #include <linux/mman.h> #include <linux/mm.h> +#include <linux/compat.h> #include <linux/smp.h> #include <linux/kdebug.h> #include <linux/smp_lock.h> @@ -239,7 +240,7 @@ static int signal_return(struct mm_struct *mm, struct pt_regs *regs, up_read(&mm->mmap_sem); clear_tsk_thread_flag(current, TIF_SINGLE_STEP); #ifdef CONFIG_COMPAT - compat = test_tsk_thread_flag(current, TIF_31BIT); + compat = is_compat_task(); if (compat && instruction == 0x0a77) sys32_sigreturn(); else if (compat && instruction == 0x0aad) diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c index e008d236cc1..f4558ccf02b 100644 --- a/arch/s390/mm/mmap.c +++ b/arch/s390/mm/mmap.c @@ -28,6 +28,7 @@ #include <linux/mm.h> #include <linux/module.h> #include <asm/pgalloc.h> +#include <asm/compat.h> /* * Top of mmap area (just below the process stack). @@ -55,7 +56,7 @@ static inline int mmap_is_legacy(void) /* * Force standard allocation for 64 bit programs. */ - if (!test_thread_flag(TIF_31BIT)) + if (!is_compat_task()) return 1; #endif return sysctl_legacy_va_layout || @@ -91,7 +92,7 @@ EXPORT_SYMBOL_GPL(arch_pick_mmap_layout); int s390_mmap_check(unsigned long addr, unsigned long len) { - if (!test_thread_flag(TIF_31BIT) && + if (!is_compat_task() && len >= TASK_SIZE && TASK_SIZE < (1UL << 53)) return crst_table_upgrade(current->mm, 1UL << 53); return 0; @@ -108,8 +109,7 @@ s390_get_unmapped_area(struct file *filp, unsigned long addr, area = arch_get_unmapped_area(filp, addr, len, pgoff, flags); if (!(area & ~PAGE_MASK)) return area; - if (area == -ENOMEM && - !test_thread_flag(TIF_31BIT) && TASK_SIZE < (1UL << 53)) { + if (area == -ENOMEM && !is_compat_task() && TASK_SIZE < (1UL << 53)) { /* Upgrade the page table to 4 levels and retry. */ rc = crst_table_upgrade(mm, 1UL << 53); if (rc) @@ -131,8 +131,7 @@ s390_get_unmapped_area_topdown(struct file *filp, const unsigned long addr, area = arch_get_unmapped_area_topdown(filp, addr, len, pgoff, flags); if (!(area & ~PAGE_MASK)) return area; - if (area == -ENOMEM && - !test_thread_flag(TIF_31BIT) && TASK_SIZE < (1UL << 53)) { + if (area == -ENOMEM && !is_compat_task() && TASK_SIZE < (1UL << 53)) { /* Upgrade the page table to 4 levels and retry. */ rc = crst_table_upgrade(mm, 1UL << 53); if (rc) |