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Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/arch/x86/include/asm/syscall.h

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/* SPDX-License-Identifier: GPL-2.0-only / / * Access to user system call parameters and results * * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved. * * See asm-generic/syscall.h for descriptions of what we must do here. / #ifndef _ASM_X86_SYSCALL_H #define _ASM_X86_SYSCALL_H #include <uapi/linux/audit.h> #include <linux/sched.h> #include <linux/err.h> #include <asm/asm-offsets.h> / For NR_syscalls / #include <asm/thread_info.h> / for TS_COMPAT / #include <asm/unistd.h> #ifdef CONFIG_X86_64 typedef asmlinkage long (sys_call_ptr_t)(const struct pt_regs ); #else typedef asmlinkage long (sys_call_ptr_t)(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); #endif /* CONFIG_X86_64 / extern const sys_call_ptr_t sys_call_table[]; #if defined(CONFIG_X86_32) #define ia32_sys_call_table sys_call_table #define __NR_syscall_compat_max __NR_syscall_max #define IA32_NR_syscalls NR_syscalls #endif #if defined(CONFIG_IA32_EMULATION) extern const sys_call_ptr_t ia32_sys_call_table[]; #endif #ifdef CONFIG_X86_X32_ABI extern const sys_call_ptr_t x32_sys_call_table[]; #endif / * Only the low 32 bits of orig_ax are meaningful, so we return int. * This importantly ignores the high bits on 64-bit, so comparisons * sign-extend the low 32 bits. / static inline int syscall_get_nr(struct task_struct task, struct pt_regs regs) { return regs->orig_ax; } static inline void syscall_rollback(struct task_struct task, struct pt_regs regs) { regs->ax = regs->orig_ax; } static inline long syscall_get_error(struct task_struct task, struct pt_regs regs) { unsigned long error = regs->ax; #ifdef CONFIG_IA32_EMULATION / * TS_COMPAT is set for 32-bit syscall entries and then * remains set until we return to user mode. / if (task->thread_info.status & (TS_COMPAT\|TS_I386_REGS_POKED)) / * Sign-extend the value so (int)-EFOO becomes (long)-EFOO * and will match correctly in comparisons. / error = (long) (int) error; #endif return IS_ERR_VALUE(error) ? error : 0; } static inline long syscall_get_return_value(struct task_struct task, struct pt_regs regs) { return regs->ax; } static inline void syscall_set_return_value(struct task_struct task, struct pt_regs regs, int error, long val) { regs->ax = (long) error ?: val; } #ifdef CONFIG_X86_32 static inline void syscall_get_arguments(struct task_struct task, struct pt_regs regs, unsigned long args) { memcpy(args, &regs->bx, 6 * sizeof(args[0])); } static inline void syscall_set_arguments(struct task_struct task, struct pt_regs regs, unsigned int i, unsigned int n, const unsigned long args) { BUG_ON(i + n > 6); memcpy(&regs->bx + i, args, n sizeof(args[0])); } static inline int syscall_get_arch(struct task_struct task) { return AUDIT_ARCH_I386; } #else / CONFIG_X86_64 / static inline void syscall_get_arguments(struct task_struct task, struct pt_regs regs, unsigned long args) { # ifdef CONFIG_IA32_EMULATION if (task->thread_info.status & TS_COMPAT) { args++ = regs->bx; args++ = regs->cx; args++ = regs->dx; args++ = regs->si; args++ = regs->di; args = regs->bp; } else # endif { args++ = regs->di; args++ = regs->si; args++ = regs->dx; args++ = regs->r10; args++ = regs->r8; args = regs->r9; } } static inline void syscall_set_arguments(struct task_struct task, struct pt_regs regs, const unsigned long args) { # ifdef CONFIG_IA32_EMULATION if (task->thread_info.status & TS_COMPAT) { regs->bx = args++; regs->cx = args++; regs->dx = args++; regs->si = args++; regs->di = args++; regs->bp = args; } else # endif { regs->di = args++; regs->si = args++; regs->dx = args++; regs->r10 = args++; regs->r8 = args++; regs->r9 = args; } } static inline int syscall_get_arch(struct task_struct task) { /* x32 tasks should be considered AUDIT_ARCH_X86_64. / return (IS_ENABLED(CONFIG_IA32_EMULATION) && task->thread_info.status & TS_COMPAT) ? AUDIT_ARCH_I386 : AUDIT_ARCH_X86_64; } #endif / CONFIG_X86_32 / #endif / _ASM_X86_SYSCALL_H */

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