// 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
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