136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* sys_ppc32.c: 32-bit system calls with complex calling conventions.
|
|
*
|
|
* Copyright (C) 2001 IBM
|
|
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
|
|
*
|
|
* 32-bit system calls with 64-bit arguments pass those in register pairs.
|
|
* This must be specially dealt with on 64-bit kernels. The compat_arg_u64_dual
|
|
* in generic compat syscalls is not always usable because the register
|
|
* pairing is constrained depending on preceding arguments.
|
|
*
|
|
* An analogous problem exists on 32-bit kernels with ARCH_HAS_SYSCALL_WRAPPER,
|
|
* the defined system call functions take the pt_regs as an argument, and there
|
|
* is a mapping macro which maps registers to arguments
|
|
* (SC_POWERPC_REGS_TO_ARGS) which also does not deal with these 64-bit
|
|
* arguments.
|
|
*
|
|
* This file contains these system calls.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/file.h>
|
|
#include <linux/signal.h>
|
|
#include <linux/resource.h>
|
|
#include <linux/times.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/msg.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/personality.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/in.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/binfmts.h>
|
|
#include <linux/security.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/elf.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/types.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/unistd.h>
|
|
#include <asm/time.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/ppc-pci.h>
|
|
#include <asm/syscalls.h>
|
|
#include <asm/switch_to.h>
|
|
|
|
#ifdef CONFIG_PPC32
|
|
#define PPC32_SYSCALL_DEFINE4 SYSCALL_DEFINE4
|
|
#define PPC32_SYSCALL_DEFINE5 SYSCALL_DEFINE5
|
|
#define PPC32_SYSCALL_DEFINE6 SYSCALL_DEFINE6
|
|
#else
|
|
#define PPC32_SYSCALL_DEFINE4 COMPAT_SYSCALL_DEFINE4
|
|
#define PPC32_SYSCALL_DEFINE5 COMPAT_SYSCALL_DEFINE5
|
|
#define PPC32_SYSCALL_DEFINE6 COMPAT_SYSCALL_DEFINE6
|
|
#endif
|
|
|
|
PPC32_SYSCALL_DEFINE6(ppc_pread64,
|
|
unsigned int, fd,
|
|
char __user *, ubuf, compat_size_t, count,
|
|
u32, reg6, u32, pos1, u32, pos2)
|
|
{
|
|
return ksys_pread64(fd, ubuf, count, merge_64(pos1, pos2));
|
|
}
|
|
|
|
PPC32_SYSCALL_DEFINE6(ppc_pwrite64,
|
|
unsigned int, fd,
|
|
const char __user *, ubuf, compat_size_t, count,
|
|
u32, reg6, u32, pos1, u32, pos2)
|
|
{
|
|
return ksys_pwrite64(fd, ubuf, count, merge_64(pos1, pos2));
|
|
}
|
|
|
|
PPC32_SYSCALL_DEFINE5(ppc_readahead,
|
|
int, fd, u32, r4,
|
|
u32, offset1, u32, offset2, u32, count)
|
|
{
|
|
return ksys_readahead(fd, merge_64(offset1, offset2), count);
|
|
}
|
|
|
|
PPC32_SYSCALL_DEFINE4(ppc_truncate64,
|
|
const char __user *, path, u32, reg4,
|
|
unsigned long, len1, unsigned long, len2)
|
|
{
|
|
return ksys_truncate(path, merge_64(len1, len2));
|
|
}
|
|
|
|
PPC32_SYSCALL_DEFINE4(ppc_ftruncate64,
|
|
unsigned int, fd, u32, reg4,
|
|
unsigned long, len1, unsigned long, len2)
|
|
{
|
|
return ksys_ftruncate(fd, merge_64(len1, len2));
|
|
}
|
|
|
|
PPC32_SYSCALL_DEFINE6(ppc32_fadvise64,
|
|
int, fd, u32, unused, u32, offset1, u32, offset2,
|
|
size_t, len, int, advice)
|
|
{
|
|
return ksys_fadvise64_64(fd, merge_64(offset1, offset2), len,
|
|
advice);
|
|
}
|
|
|
|
PPC32_SYSCALL_DEFINE6(ppc_sync_file_range2,
|
|
int, fd, unsigned int, flags,
|
|
unsigned int, offset1, unsigned int, offset2,
|
|
unsigned int, nbytes1, unsigned int, nbytes2)
|
|
{
|
|
loff_t offset = merge_64(offset1, offset2);
|
|
loff_t nbytes = merge_64(nbytes1, nbytes2);
|
|
|
|
return ksys_sync_file_range(fd, offset, nbytes, flags);
|
|
}
|
|
|
|
#ifdef CONFIG_PPC32
|
|
SYSCALL_DEFINE6(ppc_fallocate,
|
|
int, fd, int, mode,
|
|
u32, offset1, u32, offset2, u32, len1, u32, len2)
|
|
{
|
|
return ksys_fallocate(fd, mode,
|
|
merge_64(offset1, offset2),
|
|
merge_64(len1, len2));
|
|
}
|
|
#endif
|