[mirror_ubuntu-jammy-kernel.git] / arch / powerpc / kernel / sys_ppc32.c

/*
 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
 *
 * 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)
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * environment.
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#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/mman.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 <asm/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>


asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
		compat_ulong_t __user *outp, compat_ulong_t __user *exp,
		compat_uptr_t tvp_x)
{
	/* sign extend n */
	return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
}

#ifdef CONFIG_SYSVIPC
long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
	       u32 fifth)
{
	int version;

	version = call >> 16; /* hack for backward compatibility */
	call &= 0xffff;

	switch (call) {

	case SEMTIMEDOP:
		if (fifth)
			/* sign extend semid */
			return compat_sys_semtimedop((int)first,
						     compat_ptr(ptr), second,
						     compat_ptr(fifth));
		/* else fall through for normal semop() */
	case SEMOP:
		/* struct sembuf is the same on 32 and 64bit :)) */
		/* sign extend semid */
		return sys_semtimedop((int)first, compat_ptr(ptr), second,
				      NULL);
	case SEMGET:
		/* sign extend key, nsems */
		return sys_semget((int)first, (int)second, third);
	case SEMCTL:
		/* sign extend semid, semnum */
		return compat_sys_semctl((int)first, (int)second, third,
					 compat_ptr(ptr));

	case MSGSND:
		/* sign extend msqid */
		return compat_sys_msgsnd((int)first, (int)second, third,
					 compat_ptr(ptr));
	case MSGRCV:
		/* sign extend msqid, msgtyp */
		return compat_sys_msgrcv((int)first, second, (int)fifth,
					 third, version, compat_ptr(ptr));
	case MSGGET:
		/* sign extend key */
		return sys_msgget((int)first, second);
	case MSGCTL:
		/* sign extend msqid */
		return compat_sys_msgctl((int)first, second, compat_ptr(ptr));

	case SHMAT:
		/* sign extend shmid */
		return compat_sys_shmat((int)first, second, third, version,
					compat_ptr(ptr));
	case SHMDT:
		return sys_shmdt(compat_ptr(ptr));
	case SHMGET:
		/* sign extend key_t */
		return sys_shmget((int)first, second, third);
	case SHMCTL:
		/* sign extend shmid */
		return compat_sys_shmctl((int)first, second, compat_ptr(ptr));

	default:
		return -ENOSYS;
	}

	return -ENOSYS;
}
#endif

/* Note: it is necessary to treat out_fd and in_fd as unsigned ints, 
 * with the corresponding cast to a signed int to insure that the 
 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 * and the register representation of a signed int (msr in 64-bit mode) is performed.
 */
asmlinkage long compat_sys_sendfile_wrapper(u32 out_fd, u32 in_fd,
					    compat_off_t __user *offset, u32 count)
{
	return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count);
}

asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
					      compat_loff_t __user *offset, u32 count)
{
	return sys_sendfile((int)out_fd, (int)in_fd,
			    (off_t __user *)offset, count);
}

unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
			  unsigned long prot, unsigned long flags,
			  unsigned long fd, unsigned long pgoff)
{
	/* This should remain 12 even if PAGE_SIZE changes */
	return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
}

/* 
 * long long munging:
 * The 32 bit ABI passes long longs in an odd even register pair.
 */

compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
			     u32 reg6, u32 poshi, u32 poslo)
{
	return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
}

compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
			      u32 reg6, u32 poshi, u32 poslo)
{
	return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
}

compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
{
	return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
}

asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
				unsigned long high, unsigned long low)
{
	return sys_truncate(path, (high << 32) | low);
}

asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
				     u32 lenhi, u32 lenlo)
{
	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
			     ((loff_t)lenhi << 32) | lenlo);
}

asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
				 unsigned long low)
{
	return sys_ftruncate(fd, (high << 32) | low);
}

long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
			  size_t len)
{
	return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
				  buf, len);
}

long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
		     size_t len, int advice)
{
	return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
			     advice);
}

asmlinkage long compat_sys_add_key(const char __user *_type,
			      const char __user *_description,
			      const void __user *_payload,
			      u32 plen,
			      u32 ringid)
{
	return sys_add_key(_type, _description, _payload, plen, ringid);
}

asmlinkage long compat_sys_request_key(const char __user *_type,
				  const char __user *_description,
				  const char __user *_callout_info,
				  u32 destringid)
{
	return sys_request_key(_type, _description, _callout_info, destringid);
}

asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
				   unsigned offset_hi, unsigned offset_lo,
				   unsigned nbytes_hi, unsigned nbytes_lo)
{
	loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
	loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;

	return sys_sync_file_range(fd, offset, nbytes, flags);
}

asmlinkage long compat_sys_fanotify_mark(int fanotify_fd, unsigned int flags,
					 unsigned mask_hi, unsigned mask_lo,
					 int dfd, const char __user *pathname)
{
	u64 mask = ((u64)mask_hi << 32) | mask_lo;
	return sys_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
	3	*
	4	* Copyright (C) 2001 IBM
	5	* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
	6	* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
	7	*
	8	* These routines maintain argument size conversion between 32bit and 64bit
	9	* environment.
	10	*
	11	* This program is free software; you can redistribute it and/or
	12	* modify it under the terms of the GNU General Public License
	13	* as published by the Free Software Foundation; either version
	14	* 2 of the License, or (at your option) any later version.
	15	*/
	16
1da177e4 LT	17	#include <linux/kernel.h>
	18	#include <linux/sched.h>
	19	#include <linux/fs.h>
	20	#include <linux/mm.h>
	21	#include <linux/file.h>
	22	#include <linux/signal.h>
	23	#include <linux/resource.h>
	24	#include <linux/times.h>
1da177e4	25	#include <linux/smp.h>
1da177e4 LT	26	#include <linux/sem.h>
	27	#include <linux/msg.h>
	28	#include <linux/shm.h>
1da177e4 LT	29	#include <linux/poll.h>
	30	#include <linux/personality.h>
	31	#include <linux/stat.h>
1da177e4	32	#include <linux/mman.h>
1da177e4	33	#include <linux/in.h>
1da177e4 LT	34	#include <linux/syscalls.h>
	35	#include <linux/unistd.h>
	36	#include <linux/sysctl.h>
	37	#include <linux/binfmts.h>
1da177e4 LT	38	#include <linux/security.h>
	39	#include <linux/compat.h>
	40	#include <linux/ptrace.h>
1da177e4	41	#include <linux/elf.h>
cba4fbbf	42	#include <linux/ipc.h>
5a0e3ad6	43	#include <linux/slab.h>
1da177e4	44
1da177e4 LT	45	#include <asm/ptrace.h>
1da177e4 LT	46	#include <asm/types.h>
1da177e4 LT	47	#include <asm/uaccess.h>
1da177e4 LT	48	#include <asm/unistd.h>
1da177e4 LT	49	#include <asm/time.h>
1da177e4 LT	50	#include <asm/mmu_context.h>
d387899f	51	#include <asm/ppc-pci.h>
369cf4b9	52	#include <asm/syscalls.h>
ae3a197e	53	#include <asm/switch_to.h>
1da177e4	54
1da177e4	55
1da177e4 LT	56	asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
	57	compat_ulong_t __user outp, compat_ulong_t __user exp,
	58	compat_uptr_t tvp_x)
	59	{
	60	/* sign extend n */
	61	return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
	62	}
	63
1da177e4	64	#ifdef CONFIG_SYSVIPC
b09a4913	65	long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
1da177e4 LT	66	u32 fifth)
	67	{
	68	int version;
	69
	70	version = call >> 16; /* hack for backward compatibility */
	71	call &= 0xffff;
	72
	73	switch (call) {
	74
	75	case SEMTIMEDOP:
	76	if (fifth)
	77	/* sign extend semid */
	78	return compat_sys_semtimedop((int)first,
	79	compat_ptr(ptr), second,
	80	compat_ptr(fifth));
	81	/* else fall through for normal semop() */
	82	case SEMOP:
	83	/* struct sembuf is the same on 32 and 64bit :)) */
	84	/* sign extend semid */
	85	return sys_semtimedop((int)first, compat_ptr(ptr), second,
	86	NULL);
	87	case SEMGET:
	88	/* sign extend key, nsems */
	89	return sys_semget((int)first, (int)second, third);
	90	case SEMCTL:
	91	/* sign extend semid, semnum */
	92	return compat_sys_semctl((int)first, (int)second, third,
	93	compat_ptr(ptr));
	94
	95	case MSGSND:
	96	/* sign extend msqid */
	97	return compat_sys_msgsnd((int)first, (int)second, third,
	98	compat_ptr(ptr));
	99	case MSGRCV:
	100	/* sign extend msqid, msgtyp */
	101	return compat_sys_msgrcv((int)first, second, (int)fifth,
	102	third, version, compat_ptr(ptr));
	103	case MSGGET:
	104	/* sign extend key */
	105	return sys_msgget((int)first, second);
	106	case MSGCTL:
	107	/* sign extend msqid */
	108	return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
	109
	110	case SHMAT:
	111	/* sign extend shmid */
	112	return compat_sys_shmat((int)first, second, third, version,
	113	compat_ptr(ptr));
	114	case SHMDT:
	115	return sys_shmdt(compat_ptr(ptr));
	116	case SHMGET:
	117	/* sign extend key_t */
	118	return sys_shmget((int)first, second, third);
	119	case SHMCTL:
	120	/* sign extend shmid */
	121	return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
	122
	123	default:
	124	return -ENOSYS;
	125	}
	126
	127	return -ENOSYS;
	128	}
	129	#endif
130
131	/* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
132	* with the corresponding cast to a signed int to insure that the
133	* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
134	* and the register representation of a signed int (msr in 64-bit mode) is performed.
135	*/
8f9c0119 CM	136	asmlinkage long compat_sys_sendfile_wrapper(u32 out_fd, u32 in_fd,
8f9c0119 CM	137	compat_off_t __user *offset, u32 count)
1da177e4	138	{
8f9c0119	139	return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count);
1da177e4 LT	140	}
1da177e4 LT	141
8f9c0119 CM	142	asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
8f9c0119 CM	143	compat_loff_t __user *offset, u32 count)
1da177e4	144	{
8f9c0119 CM	145	return sys_sendfile((int)out_fd, (int)in_fd,
8f9c0119 CM	146	(off_t __user *)offset, count);
1da177e4 LT	147	}
1da177e4 LT	148
b09a4913	149	unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
1da177e4 LT	150	unsigned long prot, unsigned long flags,
	151	unsigned long fd, unsigned long pgoff)
	152	{
	153	/* This should remain 12 even if PAGE_SIZE changes */
	154	return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
	155	}
	156
1da177e4 LT	157	/*
	158	* long long munging:
	159	* The 32 bit ABI passes long longs in an odd even register pair.
	160	*/
	161
b09a4913	162	compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
1da177e4 LT	163	u32 reg6, u32 poshi, u32 poslo)
	164	{
	165	return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) \| poslo);
	166	}
	167
c7887325	168	compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
1da177e4 LT	169	u32 reg6, u32 poshi, u32 poslo)
	170	{
	171	return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) \| poslo);
	172	}
	173
b09a4913	174	compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
1da177e4 LT	175	{
	176	return sys_readahead(fd, ((loff_t)offhi << 32) \| offlo, count);
	177	}
	178
b09a4913	179	asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
1da177e4 LT	180	unsigned long high, unsigned long low)
	181	{
	182	return sys_truncate(path, (high << 32) \| low);
	183	}
	184
97ac7350 AA	185	asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
	186	u32 lenhi, u32 lenlo)
	187	{
	188	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) \| offlo,
	189	((loff_t)lenhi << 32) \| lenlo);
	190	}
	191
b09a4913	192	asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
1da177e4 LT	193	unsigned long low)
	194	{
	195	return sys_ftruncate(fd, (high << 32) \| low);
	196	}
	197
	198	long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
	199	size_t len)
	200	{
	201	return sys_lookup_dcookie((u64)cookie_high << 32 \| cookie_low,
	202	buf, len);
	203	}
	204
	205	long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
	206	size_t len, int advice)
	207	{
	208	return sys_fadvise64(fd, (u64)offset_high << 32 \| offset_low, len,
	209	advice);
	210	}
	211
b09a4913	212	asmlinkage long compat_sys_add_key(const char __user *_type,
1da177e4 LT	213	const char __user *_description,
	214	const void __user *_payload,
	215	u32 plen,
	216	u32 ringid)
	217	{
	218	return sys_add_key(_type, _description, _payload, plen, ringid);
	219	}
	220
b09a4913	221	asmlinkage long compat_sys_request_key(const char __user *_type,
1da177e4 LT	222	const char __user *_description,
	223	const char __user *_callout_info,
	224	u32 destringid)
	225	{
	226	return sys_request_key(_type, _description, _callout_info, destringid);
	227	}
	228
edd5cd4a DW	229	asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
	230	unsigned offset_hi, unsigned offset_lo,
	231	unsigned nbytes_hi, unsigned nbytes_lo)
	232	{
	233	loff_t offset = ((loff_t)offset_hi << 32) \| offset_lo;
	234	loff_t nbytes = ((loff_t)nbytes_hi << 32) \| nbytes_lo;
	235
	236	return sys_sync_file_range(fd, offset, nbytes, flags);
	237	}
bcc30d37 AS	238
	239	asmlinkage long compat_sys_fanotify_mark(int fanotify_fd, unsigned int flags,
	240	unsigned mask_hi, unsigned mask_lo,
	241	int dfd, const char __user *pathname)
	242	{
	243	u64 mask = ((u64)mask_hi << 32) \| mask_lo;
	244	return sys_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);
	245	}