diff options
Diffstat (limited to 'arch/x86/math-emu/fpu_system.h')
| -rw-r--r-- | arch/x86/math-emu/fpu_system.h | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/arch/x86/math-emu/fpu_system.h b/arch/x86/math-emu/fpu_system.h deleted file mode 100644 index 5e238e930fe3..000000000000 --- a/arch/x86/math-emu/fpu_system.h +++ /dev/null @@ -1,130 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/*---------------------------------------------------------------------------+ - | fpu_system.h | - | | - | Copyright (C) 1992,1994,1997 | - | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, | - | Australia. E-mail billm@suburbia.net | - | | - +---------------------------------------------------------------------------*/ - -#ifndef _FPU_SYSTEM_H -#define _FPU_SYSTEM_H - -/* system dependent definitions */ - -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> - -#include <asm/desc.h> -#include <asm/mmu_context.h> - -static inline struct desc_struct FPU_get_ldt_descriptor(unsigned seg) -{ - static struct desc_struct zero_desc; - struct desc_struct ret = zero_desc; - -#ifdef CONFIG_MODIFY_LDT_SYSCALL - seg >>= 3; - mutex_lock(¤t->mm->context.lock); - if (current->mm->context.ldt && seg < current->mm->context.ldt->nr_entries) - ret = current->mm->context.ldt->entries[seg]; - mutex_unlock(¤t->mm->context.lock); -#endif - return ret; -} - -#define SEG_TYPE_WRITABLE (1U << 1) -#define SEG_TYPE_EXPANDS_DOWN (1U << 2) -#define SEG_TYPE_EXECUTE (1U << 3) -#define SEG_TYPE_EXPAND_MASK (SEG_TYPE_EXPANDS_DOWN | SEG_TYPE_EXECUTE) -#define SEG_TYPE_EXECUTE_MASK (SEG_TYPE_WRITABLE | SEG_TYPE_EXECUTE) - -static inline unsigned long seg_get_base(struct desc_struct *d) -{ - unsigned long base = (unsigned long)d->base2 << 24; - - return base | ((unsigned long)d->base1 << 16) | d->base0; -} - -static inline unsigned long seg_get_limit(struct desc_struct *d) -{ - return ((unsigned long)d->limit1 << 16) | d->limit0; -} - -static inline unsigned long seg_get_granularity(struct desc_struct *d) -{ - return d->g ? 4096 : 1; -} - -static inline bool seg_expands_down(struct desc_struct *d) -{ - return (d->type & SEG_TYPE_EXPAND_MASK) == SEG_TYPE_EXPANDS_DOWN; -} - -static inline bool seg_execute_only(struct desc_struct *d) -{ - return (d->type & SEG_TYPE_EXECUTE_MASK) == SEG_TYPE_EXECUTE; -} - -static inline bool seg_writable(struct desc_struct *d) -{ - return (d->type & SEG_TYPE_EXECUTE_MASK) == SEG_TYPE_WRITABLE; -} - -#define I387 (&x86_task_fpu(current)->fpstate->regs) -#define FPU_info (I387->soft.info) - -#define FPU_CS (*(unsigned short *) &(FPU_info->regs->cs)) -#define FPU_SS (*(unsigned short *) &(FPU_info->regs->ss)) -#define FPU_DS (*(unsigned short *) &(FPU_info->regs->ds)) -#define FPU_EAX (FPU_info->regs->ax) -#define FPU_EFLAGS (FPU_info->regs->flags) -#define FPU_EIP (FPU_info->regs->ip) -#define FPU_ORIG_EIP (FPU_info->___orig_eip) - -#define FPU_lookahead (I387->soft.lookahead) - -/* nz if ip_offset and cs_selector are not to be set for the current - instruction. */ -#define no_ip_update (*(u_char *)&(I387->soft.no_update)) -#define FPU_rm (*(u_char *)&(I387->soft.rm)) - -/* Number of bytes of data which can be legally accessed by the current - instruction. This only needs to hold a number <= 108, so a byte will do. */ -#define access_limit (*(u_char *)&(I387->soft.alimit)) - -#define partial_status (I387->soft.swd) -#define control_word (I387->soft.cwd) -#define fpu_tag_word (I387->soft.twd) -#define registers (I387->soft.st_space) -#define top (I387->soft.ftop) - -#define instruction_address (*(struct address *)&I387->soft.fip) -#define operand_address (*(struct address *)&I387->soft.foo) - -#define FPU_access_ok(y,z) if ( !access_ok(y,z) ) \ - math_abort(FPU_info,SIGSEGV) -#define FPU_abort math_abort(FPU_info, SIGSEGV) -#define FPU_copy_from_user(to, from, n) \ - do { if (copy_from_user(to, from, n)) FPU_abort; } while (0) - -#undef FPU_IGNORE_CODE_SEGV -#ifdef FPU_IGNORE_CODE_SEGV -/* access_ok() is very expensive, and causes the emulator to run - about 20% slower if applied to the code. Anyway, errors due to bad - code addresses should be much rarer than errors due to bad data - addresses. */ -#define FPU_code_access_ok(z) -#else -/* A simpler test than access_ok() can probably be done for - FPU_code_access_ok() because the only possible error is to step - past the upper boundary of a legal code area. */ -#define FPU_code_access_ok(z) FPU_access_ok((void __user *)FPU_EIP,z) -#endif - -#define FPU_get_user(x,y) do { if (get_user((x),(y))) FPU_abort; } while (0) -#define FPU_put_user(x,y) do { if (put_user((x),(y))) FPU_abort; } while (0) - -#endif |