diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/Kconfig | 1 | ||||
| -rw-r--r-- | arch/s390/kernel/Makefile | 7 | ||||
| -rw-r--r-- | arch/s390/kernel/binfmt_elf32.c | 214 | ||||
| -rw-r--r-- | arch/s390/kernel/compat_ptrace.h | 4 | ||||
| -rw-r--r-- | arch/s390/kernel/ptrace.c | 363 |
5 files changed, 327 insertions, 262 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 107e492cb47..a79820c3ab0 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -146,6 +146,7 @@ config MATHEMU config COMPAT bool "Kernel support for 31 bit emulation" depends on 64BIT + select COMPAT_BINFMT_ELF help Select this option if you want to enable your system kernel to handle system-calls from ELF binaries for 31 bit ESA. This option diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 6302f508258..0fed81d91e0 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -7,6 +7,11 @@ # CFLAGS_smp.o := -Wno-nonnull +# +# Pass UTS_MACHINE for user_regset definition +# +CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"' + obj-y := bitmap.o traps.o time.o process.o base.o early.o \ setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \ s390_ext.o debug.o irq.o ipl.o dis.o diag.o @@ -23,7 +28,7 @@ obj-$(CONFIG_AUDIT) += audit.o compat-obj-$(CONFIG_AUDIT) += compat_audit.o obj-$(CONFIG_COMPAT) += compat_linux.o compat_signal.o \ compat_wrapper.o compat_exec_domain.o \ - binfmt_elf32.o $(compat-obj-y) + $(compat-obj-y) obj-$(CONFIG_VIRT_TIMER) += vtime.o obj-$(CONFIG_STACKTRACE) += stacktrace.o diff --git a/arch/s390/kernel/binfmt_elf32.c b/arch/s390/kernel/binfmt_elf32.c deleted file mode 100644 index 3e1c315b736..00000000000 --- a/arch/s390/kernel/binfmt_elf32.c +++ /dev/null @@ -1,214 +0,0 @@ -/* - * Support for 32-bit Linux for S390 ELF binaries. - * - * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Gerhard Tonn (ton@de.ibm.com) - * - * Heavily inspired by the 32-bit Sparc compat code which is - * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com) - * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz) - */ - -#define __ASMS390_ELF_H - -#include <linux/time.h> - -/* - * These are used to set parameters in the core dumps. - */ -#define ELF_CLASS ELFCLASS32 -#define ELF_DATA ELFDATA2MSB -#define ELF_ARCH EM_S390 - -/* - * This is used to ensure we don't load something for the wrong architecture. - */ -#define elf_check_arch(x) \ - (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \ - && (x)->e_ident[EI_CLASS] == ELF_CLASS) - -/* ELF register definitions */ -#define NUM_GPRS 16 -#define NUM_FPRS 16 -#define NUM_ACRS 16 - -/* For SVR4/S390 the function pointer to be registered with `atexit` is - passed in R14. */ -#define ELF_PLAT_INIT(_r, load_addr) \ - do { \ - _r->gprs[14] = 0; \ - } while(0) - -#define USE_ELF_CORE_DUMP -#define ELF_EXEC_PAGESIZE 4096 - -/* This is the location that an ET_DYN program is loaded if exec'ed. Typical - use of this is to invoke "./ld.so someprog" to test out a new version of - the loader. We need to make sure that it is out of the way of the program - that it will "exec", and that there is sufficient room for the brk. */ - -#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) - -/* Wow, the "main" arch needs arch dependent functions too.. :) */ - -/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is - now struct_user_regs, they are different) */ - -#define ELF_CORE_COPY_REGS(pr_reg, regs) dump_regs32(regs, &pr_reg); - -#define ELF_CORE_COPY_TASK_REGS(tsk, regs) dump_task_regs32(tsk, regs) - -#define ELF_CORE_COPY_FPREGS(tsk, fpregs) dump_task_fpu(tsk, fpregs) - -/* This yields a mask that user programs can use to figure out what - instruction set this CPU supports. */ - -#define ELF_HWCAP (0) - -/* This yields a string that ld.so will use to load implementation - specific libraries for optimization. This is more specific in - intent than poking at uname or /proc/cpuinfo. - - For the moment, we have only optimizations for the Intel generations, - but that could change... */ - -#define ELF_PLATFORM (NULL) - -#define SET_PERSONALITY(ex, ibcs2) \ -do { \ - if (ibcs2) \ - set_personality(PER_SVR4); \ - else if (current->personality != PER_LINUX32) \ - set_personality(PER_LINUX); \ - set_thread_flag(TIF_31BIT); \ -} while (0) - -#include "compat_linux.h" - -typedef _s390_fp_regs32 elf_fpregset_t; - -typedef struct -{ - - _psw_t32 psw; - __u32 gprs[__NUM_GPRS]; - __u32 acrs[__NUM_ACRS]; - __u32 orig_gpr2; -} s390_regs32; -typedef s390_regs32 elf_gregset_t; - -static inline int dump_regs32(struct pt_regs *ptregs, elf_gregset_t *regs) -{ - int i; - - memcpy(®s->psw.mask, &ptregs->psw.mask, 4); - memcpy(®s->psw.addr, (char *)&ptregs->psw.addr + 4, 4); - for (i = 0; i < NUM_GPRS; i++) - regs->gprs[i] = ptregs->gprs[i]; - save_access_regs(regs->acrs); - regs->orig_gpr2 = ptregs->orig_gpr2; - return 1; -} - -static inline int dump_task_regs32(struct task_struct *tsk, elf_gregset_t *regs) -{ - struct pt_regs *ptregs = task_pt_regs(tsk); - int i; - - memcpy(®s->psw.mask, &ptregs->psw.mask, 4); - memcpy(®s->psw.addr, (char *)&ptregs->psw.addr + 4, 4); - for (i = 0; i < NUM_GPRS; i++) - regs->gprs[i] = ptregs->gprs[i]; - memcpy(regs->acrs, tsk->thread.acrs, sizeof(regs->acrs)); - regs->orig_gpr2 = ptregs->orig_gpr2; - return 1; -} - -static inline int dump_task_fpu(struct task_struct *tsk, elf_fpregset_t *fpregs) -{ - if (tsk == current) - save_fp_regs((s390_fp_regs *) fpregs); - else - memcpy(fpregs, &tsk->thread.fp_regs, sizeof(elf_fpregset_t)); - return 1; -} - -#include <asm/processor.h> -#include <asm/pgalloc.h> -#include <linux/module.h> -#include <linux/elfcore.h> -#include <linux/binfmts.h> -#include <linux/compat.h> - -#define elf_prstatus elf_prstatus32 -struct elf_prstatus32 -{ - struct elf_siginfo pr_info; /* Info associated with signal */ - short pr_cursig; /* Current signal */ - u32 pr_sigpend; /* Set of pending signals */ - u32 pr_sighold; /* Set of held signals */ - pid_t pr_pid; - pid_t pr_ppid; - pid_t pr_pgrp; - pid_t pr_sid; - struct compat_timeval pr_utime; /* User time */ - struct compat_timeval pr_stime; /* System time */ - struct compat_timeval pr_cutime; /* Cumulative user time */ - struct compat_timeval pr_cstime; /* Cumulative system time */ - elf_gregset_t pr_reg; /* GP registers */ - int pr_fpvalid; /* True if math co-processor being used. */ -}; - -#define elf_prpsinfo elf_prpsinfo32 -struct elf_prpsinfo32 -{ - char pr_state; /* numeric process state */ - char pr_sname; /* char for pr_state */ - char pr_zomb; /* zombie */ - char pr_nice; /* nice val */ - u32 pr_flag; /* flags */ - u16 pr_uid; - u16 pr_gid; - pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; - /* Lots missing */ - char pr_fname[16]; /* filename of executable */ - char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ -}; - -#include <linux/highuid.h> - -/* -#define init_elf_binfmt init_elf32_binfmt -*/ - -#undef start_thread -#define start_thread start_thread31 - -static inline void start_thread31(struct pt_regs *regs, unsigned long new_psw, - unsigned long new_stackp) -{ - set_fs(USER_DS); - regs->psw.mask = psw_user32_bits; - regs->psw.addr = new_psw; - regs->gprs[15] = new_stackp; - crst_table_downgrade(current->mm, 1UL << 31); -} - -MODULE_DESCRIPTION("Binary format loader for compatibility with 32bit Linux for S390 binaries," - " Copyright 2000 IBM Corporation"); -MODULE_AUTHOR("Gerhard Tonn <ton@de.ibm.com>"); - -#undef MODULE_DESCRIPTION -#undef MODULE_AUTHOR - -#undef cputime_to_timeval -#define cputime_to_timeval cputime_to_compat_timeval -static inline void -cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value) -{ - value->tv_usec = cputime % 1000000; - value->tv_sec = cputime / 1000000; -} - -#include "../../../fs/binfmt_elf.c" - diff --git a/arch/s390/kernel/compat_ptrace.h b/arch/s390/kernel/compat_ptrace.h index 419aef913ee..cde81fa64f8 100644 --- a/arch/s390/kernel/compat_ptrace.h +++ b/arch/s390/kernel/compat_ptrace.h @@ -1,7 +1,7 @@ #ifndef _PTRACE32_H #define _PTRACE32_H -#include "compat_linux.h" /* needed for _psw_t32 */ +#include "compat_linux.h" /* needed for psw_compat_t */ typedef struct { __u32 cr[3]; @@ -38,7 +38,7 @@ typedef struct { struct user_regs_struct32 { - _psw_t32 psw; + psw_compat_t psw; u32 gprs[NUM_GPRS]; u32 acrs[NUM_ACRS]; u32 orig_gpr2; diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index 35827b9bd4d..2815bfe348a 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -33,6 +33,8 @@ #include <linux/security.h> #include <linux/audit.h> #include <linux/signal.h> +#include <linux/elf.h> +#include <linux/regset.h> #include <asm/segment.h> #include <asm/page.h> @@ -47,6 +49,11 @@ #include "compat_ptrace.h" #endif +enum s390_regset { + REGSET_GENERAL, + REGSET_FP, +}; + static void FixPerRegisters(struct task_struct *task) { @@ -126,24 +133,10 @@ ptrace_disable(struct task_struct *child) * struct user contain pad bytes that should be read as zeroes. * Lovely... */ -static int -peek_user(struct task_struct *child, addr_t addr, addr_t data) +static unsigned long __peek_user(struct task_struct *child, addr_t addr) { struct user *dummy = NULL; - addr_t offset, tmp, mask; - - /* - * Stupid gdb peeks/pokes the access registers in 64 bit with - * an alignment of 4. Programmers from hell... - */ - mask = __ADDR_MASK; -#ifdef CONFIG_64BIT - if (addr >= (addr_t) &dummy->regs.acrs && - addr < (addr_t) &dummy->regs.orig_gpr2) - mask = 3; -#endif - if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK) - return -EIO; + addr_t offset, tmp; if (addr < (addr_t) &dummy->regs.acrs) { /* @@ -197,24 +190,18 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data) } else tmp = 0; - return put_user(tmp, (addr_t __user *) data); + return tmp; } -/* - * Write a word to the user area of a process at location addr. This - * operation does have an additional problem compared to peek_user. - * Stores to the program status word and on the floating point - * control register needs to get checked for validity. - */ static int -poke_user(struct task_struct *child, addr_t addr, addr_t data) +peek_user(struct task_struct *child, addr_t addr, addr_t data) { struct user *dummy = NULL; - addr_t offset, mask; + addr_t tmp, mask; /* * Stupid gdb peeks/pokes the access registers in 64 bit with - * an alignment of 4. Programmers from hell indeed... + * an alignment of 4. Programmers from hell... */ mask = __ADDR_MASK; #ifdef CONFIG_64BIT @@ -225,6 +212,21 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data) if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK) return -EIO; + tmp = __peek_user(child, addr); + return put_user(tmp, (addr_t __user *) data); +} + +/* + * Write a word to the user area of a process at location addr. This + * operation does have an additional problem compared to peek_user. + * Stores to the program status word and on the floating point + * control register needs to get checked for validity. + */ +static int __poke_user(struct task_struct *child, addr_t addr, addr_t data) +{ + struct user *dummy = NULL; + addr_t offset; + if (addr < (addr_t) &dummy->regs.acrs) { /* * psw and gprs are stored on the stack @@ -292,6 +294,28 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data) return 0; } +static int +poke_user(struct task_struct *child, addr_t addr, addr_t data) +{ + struct user *dummy = NULL; + addr_t mask; + + /* + * Stupid gdb peeks/pokes the access registers in 64 bit with + * an alignment of 4. Programmers from hell indeed... + */ + mask = __ADDR_MASK; +#ifdef CONFIG_64BIT + if (addr >= (addr_t) &dummy->regs.acrs && + addr < (addr_t) &dummy->regs.orig_gpr2) + mask = 3; +#endif + if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK) + return -EIO; + + return __poke_user(child, addr, data); +} + long arch_ptrace(struct task_struct *child, long request, long addr, long data) { ptrace_area parea; @@ -367,18 +391,13 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) /* * Same as peek_user but for a 31 bit program. */ -static int -peek_user_emu31(struct task_struct *child, addr_t addr, addr_t data) +static u32 __peek_user_compat(struct task_struct *child, addr_t addr) { struct user32 *dummy32 = NULL; per_struct32 *dummy_per32 = NULL; addr_t offset; __u32 tmp; - if (!test_thread_flag(TIF_31BIT) || - (addr & 3) || addr > sizeof(struct user) - 3) - return -EIO; - if (addr < (addr_t) &dummy32->regs.acrs) { /* * psw and gprs are stored on the stack @@ -435,25 +454,32 @@ peek_user_emu31(struct task_struct *child, addr_t addr, addr_t data) } else tmp = 0; + return tmp; +} + +static int peek_user_compat(struct task_struct *child, + addr_t addr, addr_t data) +{ + __u32 tmp; + + if (!test_thread_flag(TIF_31BIT) || + (addr & 3) || addr > sizeof(struct user) - 3) + return -EIO; + + tmp = __peek_user_compat(child, addr); return put_user(tmp, (__u32 __user *) data); } /* * Same as poke_user but for a 31 bit program. */ -static int -poke_user_emu31(struct task_struct *child, addr_t addr, addr_t data) +static int __poke_user_compat(struct task_struct *child, + addr_t addr, addr_t data) { struct user32 *dummy32 = NULL; per_struct32 *dummy_per32 = NULL; + __u32 tmp = (__u32) data; addr_t offset; - __u32 tmp; - - if (!test_thread_flag(TIF_31BIT) || - (addr & 3) || addr > sizeof(struct user32) - 3) - return -EIO; - - tmp = (__u32) data; if (addr < (addr_t) &dummy32->regs.acrs) { /* @@ -528,6 +554,16 @@ poke_user_emu31(struct task_struct *child, addr_t addr, addr_t data) return 0; } +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) + return -EIO; + + return __poke_user_compat(child, addr, data); +} + long compat_arch_ptrace(struct task_struct *child, compat_long_t request, compat_ulong_t caddr, compat_ulong_t cdata) { @@ -539,11 +575,11 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, switch (request) { case PTRACE_PEEKUSR: /* read the word at location addr in the USER area. */ - return peek_user_emu31(child, addr, data); + return peek_user_compat(child, addr, data); case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ - return poke_user_emu31(child, addr, data); + return poke_user_compat(child, addr, data); case PTRACE_PEEKUSR_AREA: case PTRACE_POKEUSR_AREA: @@ -555,13 +591,13 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, copied = 0; while (copied < parea.len) { if (request == PTRACE_PEEKUSR_AREA) - ret = peek_user_emu31(child, addr, data); + ret = peek_user_compat(child, addr, data); else { __u32 utmp; if (get_user(utmp, (__u32 __force __user *) data)) return -EFAULT; - ret = poke_user_emu31(child, addr, utmp); + ret = poke_user_compat(child, addr, utmp); } if (ret) return ret; @@ -610,3 +646,240 @@ syscall_trace(struct pt_regs *regs, int entryexit) regs->gprs[2], regs->orig_gpr2, regs->gprs[3], regs->gprs[4], regs->gprs[5]); } + +/* + * user_regset definitions. + */ + +static int s390_regs_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + if (target == current) + save_access_regs(target->thread.acrs); + + if (kbuf) { + unsigned long *k = kbuf; + while (count > 0) { + *k++ = __peek_user(target, pos); + count -= sizeof(*k); + pos += sizeof(*k); + } + } else { + unsigned long __user *u = ubuf; + while (count > 0) { + if (__put_user(__peek_user(target, pos), u++)) + return -EFAULT; + count -= sizeof(*u); + pos += sizeof(*u); + } + } + return 0; +} + +static int s390_regs_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int rc = 0; + + if (target == current) + save_access_regs(target->thread.acrs); + + if (kbuf) { + const unsigned long *k = kbuf; + while (count > 0 && !rc) { + rc = __poke_user(target, pos, *k++); + count -= sizeof(*k); + pos += sizeof(*k); + } + } else { + const unsigned long __user *u = ubuf; + while (count > 0 && !rc) { + unsigned long word; + rc = __get_user(word, u++); + if (rc) + break; + rc = __poke_user(target, pos, word); + count -= sizeof(*u); + pos += sizeof(*u); + } + } + + if (rc == 0 && target == current) + restore_access_regs(target->thread.acrs); + + return rc; +} + +static int s390_fpregs_get(struct task_struct *target, + const struct user_regset *regset, unsigned int pos, + unsigned int count, void *kbuf, void __user *ubuf) +{ + if (target == current) + save_fp_regs(&target->thread.fp_regs); + + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.fp_regs, 0, -1); +} + +static int s390_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 rc = 0; + + if (target == current) + save_fp_regs(&target->thread.fp_regs); + + /* If setting FPC, must validate it first. */ + if (count > 0 && pos < offsetof(s390_fp_regs, fprs)) { + u32 fpc[2] = { target->thread.fp_regs.fpc, 0 }; + rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &fpc, + 0, offsetof(s390_fp_regs, fprs)); + if (rc) + return rc; + if ((fpc[0] & ~FPC_VALID_MASK) != 0 || fpc[1] != 0) + return -EINVAL; + target->thread.fp_regs.fpc = fpc[0]; + } + + if (rc == 0 && count > 0) + rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + target->thread.fp_regs.fprs, + offsetof(s390_fp_regs, fprs), -1); + + if (rc == 0 && target == current) + restore_fp_regs(&target->thread.fp_regs); + + return rc; +} + +static const struct user_regset s390_regsets[] = { + [REGSET_GENERAL] = { + .core_note_type = NT_PRSTATUS, + .n = sizeof(s390_regs) / sizeof(long), + .size = sizeof(long), + .align = sizeof(long), + .get = s390_regs_get, + .set = s390_regs_set, + }, + [REGSET_FP] = { + .core_note_type = NT_PRFPREG, + .n = sizeof(s390_fp_regs) / sizeof(long), + .size = sizeof(long), + .align = sizeof(long), + .get = s390_fpregs_get, + .set = s390_fpregs_set, + }, +}; + +static const struct user_regset_view user_s390_view = { + .name = UTS_MACHINE, + .e_machine = EM_S390, + .regsets = s390_regsets, + .n = ARRAY_SIZE(s390_regsets) +}; + +#ifdef CONFIG_COMPAT +static int s390_compat_regs_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + if (target == current) + save_access_regs(target->thread.acrs); + + if (kbuf) { + compat_ulong_t *k = kbuf; + while (count > 0) { + *k++ = __peek_user_compat(target, pos); + count -= sizeof(*k); + pos += sizeof(*k); + } + } else { + compat_ulong_t __user *u = ubuf; + while (count > 0) { + if (__put_user(__peek_user_compat(target, pos), u++)) + return -EFAULT; + count -= sizeof(*u); + pos += sizeof(*u); + } + } + return 0; +} + +static int s390_compat_regs_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int rc = 0; + + if (target == current) + save_access_regs(target->thread.acrs); + + if (kbuf) { + const compat_ulong_t *k = kbuf; + while (count > 0 && !rc) { + rc = __poke_user_compat(target, pos, *k++); + count -= sizeof(*k); + pos += sizeof(*k); + } + } else { + const compat_ulong_t __user *u = ubuf; + while (count > 0 && !rc) { + compat_ulong_t word; + rc = __get_user(word, u++); + if (rc) + break; + rc = __poke_user_compat(target, pos, word); + count -= sizeof(*u); + pos += sizeof(*u); + } + } + + if (rc == 0 && target == current) + restore_access_regs(target->thread.acrs); + + return rc; +} + +static const struct user_regset s390_compat_regsets[] = { + [REGSET_GENERAL] = { + .core_note_type = NT_PRSTATUS, + .n = sizeof(s390_compat_regs) / sizeof(compat_long_t), + .size = sizeof(compat_long_t), + .align = sizeof(compat_long_t), + .get = s390_compat_regs_get, + .set = s390_compat_regs_set, + }, + [REGSET_FP] = { + .core_note_type = NT_PRFPREG, + .n = sizeof(s390_fp_regs) / sizeof(compat_long_t), + .size = sizeof(compat_long_t), + .align = sizeof(compat_long_t), + .get = s390_fpregs_get, + .set = s390_fpregs_set, + }, +}; + +static const struct user_regset_view user_s390_compat_view = { + .name = "s390", + .e_machine = EM_S390, + .regsets = s390_compat_regsets, + .n = ARRAY_SIZE(s390_compat_regsets) +}; +#endif + +const struct user_regset_view *task_user_regset_view(struct task_struct *task) +{ +#ifdef CONFIG_COMPAT + if (test_tsk_thread_flag(task, TIF_31BIT)) + return &user_s390_compat_view; +#endif + return &user_s390_view; +} |