^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Access to user system call parameters and results
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * See asm-generic/syscall.h for descriptions of what we must do here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifndef _ASM_X86_SYSCALL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define _ASM_X86_SYSCALL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <uapi/linux/audit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/thread_info.h> /* for TS_COMPAT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) typedef long (*sys_call_ptr_t)(const struct pt_regs *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) extern const sys_call_ptr_t sys_call_table[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #if defined(CONFIG_X86_32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define ia32_sys_call_table sys_call_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #if defined(CONFIG_IA32_EMULATION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) extern const sys_call_ptr_t ia32_sys_call_table[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #ifdef CONFIG_X86_X32_ABI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) extern const sys_call_ptr_t x32_sys_call_table[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * Only the low 32 bits of orig_ax are meaningful, so we return int.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * This importantly ignores the high bits on 64-bit, so comparisons
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * sign-extend the low 32 bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return regs->orig_ax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static inline void syscall_rollback(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) regs->ax = regs->orig_ax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static inline long syscall_get_error(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) unsigned long error = regs->ax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #ifdef CONFIG_IA32_EMULATION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * TS_COMPAT is set for 32-bit syscall entries and then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * remains set until we return to user mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (task->thread_info.status & (TS_COMPAT|TS_I386_REGS_POKED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * Sign-extend the value so (int)-EFOO becomes (long)-EFOO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * and will match correctly in comparisons.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) error = (long) (int) error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return IS_ERR_VALUE(error) ? error : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static inline long syscall_get_return_value(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return regs->ax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static inline void syscall_set_return_value(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) int error, long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) regs->ax = (long) error ?: val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #ifdef CONFIG_X86_32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static inline void syscall_get_arguments(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned long *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) memcpy(args, ®s->bx, 6 * sizeof(args[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static inline void syscall_set_arguments(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned int i, unsigned int n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) const unsigned long *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) BUG_ON(i + n > 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) memcpy(®s->bx + i, args, n * sizeof(args[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static inline int syscall_get_arch(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return AUDIT_ARCH_I386;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #else /* CONFIG_X86_64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static inline void syscall_get_arguments(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) unsigned long *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) # ifdef CONFIG_IA32_EMULATION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (task->thread_info.status & TS_COMPAT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) *args++ = regs->bx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) *args++ = regs->cx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) *args++ = regs->dx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) *args++ = regs->si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) *args++ = regs->di;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) *args = regs->bp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) # endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) *args++ = regs->di;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) *args++ = regs->si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) *args++ = regs->dx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) *args++ = regs->r10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) *args++ = regs->r8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) *args = regs->r9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static inline void syscall_set_arguments(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) const unsigned long *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) # ifdef CONFIG_IA32_EMULATION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (task->thread_info.status & TS_COMPAT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) regs->bx = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) regs->cx = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) regs->dx = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) regs->si = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) regs->di = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) regs->bp = *args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) # endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) regs->di = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) regs->si = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) regs->dx = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) regs->r10 = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) regs->r8 = *args++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) regs->r9 = *args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static inline int syscall_get_arch(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* x32 tasks should be considered AUDIT_ARCH_X86_64. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return (IS_ENABLED(CONFIG_IA32_EMULATION) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) task->thread_info.status & TS_COMPAT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) ? AUDIT_ARCH_I386 : AUDIT_ARCH_X86_64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) void do_syscall_64(unsigned long nr, struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) void do_int80_syscall_32(struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) long do_fast_syscall_32(struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) #endif /* CONFIG_X86_32 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) #endif /* _ASM_X86_SYSCALL_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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