/* * Conversion between 32-bit and 64-bit native system calls. * * Copyright (C) 2000 Silicon Graphics, Inc. * Written by Ulf Carlsson (ulfc@engr.sgi.com) */#include <linux/compiler.h>#include <linux/mm.h>#include <linux/errno.h>#include <linux/file.h>#include <linux/highuid.h>#include <linux/resource.h>#include <linux/highmem.h>#include <linux/time.h>#include <linux/times.h>#include <linux/poll.h>#include <linux/skbuff.h>#include <linux/filter.h>#include <linux/shm.h>#include <linux/sem.h>#include <linux/msg.h>#include <linux/icmpv6.h>#include <linux/syscalls.h>#include <linux/sysctl.h>#include <linux/utime.h>#include <linux/utsname.h>#include <linux/personality.h>#include <linux/dnotify.h>#include <linux/binfmts.h>#include <linux/security.h>#include <linux/compat.h>#include <linux/vfs.h>#include <linux/ipc.h>#include <linux/slab.h> #include <net/sock.h>#include <net/scm.h> #include <asm/compat-signal.h>#include <asm/sim.h>#include <asm/uaccess.h>#include <asm/mmu_context.h>#include <asm/mman.h> /* Use this to get at 32-bit user passed pointers. *//* A() macro should be used for places where you e.g.   have some internal variable u32 and just want to get   rid of a compiler warning. AA() has to be used in   places where you want to convert a function argument   to 32bit pointer or when you e.g. access pt_regs   structure and want to consider 32bit registers only. */#define A(__x) ((unsigned long)(__x))#define AA(__x) ((unsigned long)((int)__x)) #ifdef __MIPSEB__#define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))#endif#ifdef __MIPSEL__#define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))#endif SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,	unsigned long, prot, unsigned long, flags, unsigned long, fd,	unsigned long, pgoff){	unsigned long error; 	error = -EINVAL;	if (pgoff & (~PAGE_MASK >> 12))		goto out;	error = sys_mmap_pgoff(addr, len, prot, flags, fd,			       pgoff >> (PAGE_SHIFT-12));out:	return error;} #define RLIM_INFINITY32 0x7fffffff#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x) struct rlimit32 {	int	rlim_cur;	int	rlim_max;}; SYSCALL_DEFINE4(32_truncate64, const char __user *, path,	unsigned long, __dummy, unsigned long, a2, unsigned long, a3){	return sys_truncate(path, merge_64(a2, a3));} SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,	unsigned long, a2, unsigned long, a3){	return sys_ftruncate(fd, merge_64(a2, a3));} SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,		unsigned int, offset_low, loff_t __user *, result,		unsigned int, origin){	return sys_llseek(fd, offset_high, offset_low, result, origin);} /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +   lseek back to original location.  They fail just like lseek does on   non-seekable files.	*/ SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,	unsigned long, unused, unsigned long, a4, unsigned long, a5){	return sys_pread64(fd, buf, count, merge_64(a4, a5));} SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,	size_t, count, u32, unused, u64, a4, u64, a5){	return sys_pwrite64(fd, buf, count, merge_64(a4, a5));} SYSCALL_DEFINE1(32_personality, unsigned long, personality){	unsigned int p = personality & 0xffffffff;	int ret; 	if (personality(current->personality) == PER_LINUX32 &&	    personality(p) == PER_LINUX)		p = (p & ~PER_MASK) | PER_LINUX32;	ret = sys_personality(p);	if (ret != -1 && personality(ret) == PER_LINUX32)		ret = (ret & ~PER_MASK) | PER_LINUX;	return ret;} asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,				   size_t count){	return sys_readahead(fd, merge_64(a2, a3), count);} asmlinkage long sys32_sync_file_range(int fd, int __pad,	unsigned long a2, unsigned long a3,	unsigned long a4, unsigned long a5,	int flags){	return sys_sync_file_range(fd,			merge_64(a2, a3), merge_64(a4, a5),			flags);} asmlinkage long sys32_fadvise64_64(int fd, int __pad,	unsigned long a2, unsigned long a3,	unsigned long a4, unsigned long a5,	int flags){	return sys_fadvise64_64(fd,			merge_64(a2, a3), merge_64(a4, a5),			flags);} asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,	unsigned offset_a3, unsigned len_a4, unsigned len_a5){	return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),			     merge_64(len_a4, len_a5));}