^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Implementation of various system calls for Linux/PowerPC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Derived from "arch/i386/kernel/sys_i386.c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Adapted from the i386 version by Gary Thomas
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Modified by Cort Dougan (cort@cs.nmt.edu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * and Paul Mackerras (paulus@cs.anu.edu.au).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * This file contains various random system calls that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * have a non-standard calling sequence on the Linux/PPC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * platform.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/sem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/msg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/shm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/sys.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/ipc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/utsname.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/personality.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <asm/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <asm/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <asm/asm-prototypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static inline long do_mmap2(unsigned long addr, size_t len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned long prot, unsigned long flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) unsigned long fd, unsigned long off, int shift)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) long ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (!arch_validate_prot(prot, addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (shift) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (off & ((1 << shift) - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) off >>= shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) SYSCALL_DEFINE6(mmap2, unsigned long, addr, size_t, len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) unsigned long, prot, unsigned long, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) unsigned long, fd, unsigned long, pgoff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) SYSCALL_DEFINE6(mmap, unsigned long, addr, size_t, len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) unsigned long, prot, unsigned long, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) unsigned long, fd, off_t, offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #ifdef CONFIG_PPC32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * Due to some executables calling the wrong select we sometimes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * get wrong args. This determines how the args are being passed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * (a single ptr to them all args passed) then calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * sys_select() with the appropriate args. -- Cort
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct __kernel_old_timeval __user *tvp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if ( (unsigned long)n >= 4096 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned long __user *buffer = (unsigned long __user *)n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (!access_ok(buffer, 5*sizeof(unsigned long))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) || __get_user(n, buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) || __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) || __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) || __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) || __get_user(tvp, ((struct __kernel_old_timeval __user * __user *)(buffer+4))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return sys_select(n, inp, outp, exp, tvp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #ifdef CONFIG_PPC64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) long ppc64_personality(unsigned long personality)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) long ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (personality(current->personality) == PER_LINUX32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) && personality(personality) == PER_LINUX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) personality = (personality & ~PER_MASK) | PER_LINUX32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) ret = sys_personality(personality);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (personality(ret) == PER_LINUX32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ret = (ret & ~PER_MASK) | PER_LINUX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) u32 len_high, u32 len_low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return ksys_fadvise64_64(fd, (u64)offset_high << 32 | offset_low,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) (u64)len_high << 32 | len_low, advice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) SYSCALL_DEFINE0(switch_endian)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct thread_info *ti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) current->thread.regs->msr ^= MSR_LE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * Set TIF_RESTOREALL so that r3 isn't clobbered on return to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * userspace. That also has the effect of restoring the non-volatile
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * GPRs, so we saved them on the way in here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) ti = current_thread_info();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ti->flags |= _TIF_RESTOREALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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