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Commit 2fd628fe authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Ralf Baechle
Browse files

[MIPS] Use generic compat routines for readdir, getdents 


    
Not just cleanup but also fixes O32 readdir(2) emulation.
    
Signed-off-by: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 92f22c18

arch/mips/kernel/linux32.c

+0 −54
Original line number Original line Diff line number Diff line
@@ -161,60 +161,6 @@ asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs) 
	return error;

	return error;

}

}





struct dirent32 {

	unsigned int	d_ino;

	unsigned int	d_off;

	unsigned short	d_reclen;

	char		d_name[NAME_MAX + 1];

};



static void

xlate_dirent(void *dirent64, void *dirent32, long n)

{

	long off;

	struct dirent *dirp;

	struct dirent32 *dirp32;



	off = 0;

	while (off < n) {

		dirp = (struct dirent *)(dirent64 + off);

		dirp32 = (struct dirent32 *)(dirent32 + off);

		off += dirp->d_reclen;

		dirp32->d_ino = dirp->d_ino;

		dirp32->d_off = (unsigned int)dirp->d_off;

		dirp32->d_reclen = dirp->d_reclen;

		strncpy(dirp32->d_name, dirp->d_name, dirp->d_reclen - ((3 * 4) + 2));

	}

	return;

}



asmlinkage long

sys32_getdents(unsigned int fd, void * dirent32, unsigned int count)

{

	long n;

	void *dirent64;



	dirent64 = (void *)((unsigned long)(dirent32 + (sizeof(long) - 1)) & ~(sizeof(long) - 1));

	if ((n = sys_getdents(fd, dirent64, count - (dirent64 - dirent32))) < 0)

		return(n);

	xlate_dirent(dirent64, dirent32, n);

	return(n);

}



asmlinkage int old_readdir(unsigned int fd, void * dirent, unsigned int count);



asmlinkage int

sys32_readdir(unsigned int fd, void * dirent32, unsigned int count)

{

	int n;

	struct dirent dirent64;



	if ((n = old_readdir(fd, &dirent64, count)) < 0)

		return(n);

	xlate_dirent(&dirent64, dirent32, dirent64.d_reclen);

	return(n);

}



asmlinkage int

asmlinkage int

sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)

sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)

{

{

arch/mips/kernel/scall64-n32.S

+1 −1
Original line number Original line Diff line number Diff line
@@ -195,7 +195,7 @@ EXPORT(sysn32_call_table) 
	PTR	sys_fdatasync

	PTR	sys_fdatasync

	PTR	sys_truncate

	PTR	sys_truncate

	PTR	sys_ftruncate			/* 6075 */

	PTR	sys_ftruncate			/* 6075 */

	PTR	sys32_getdents

	PTR	compat_sys_getdents

	PTR	sys_getcwd

	PTR	sys_getcwd

	PTR	sys_chdir

	PTR	sys_chdir

	PTR	sys_fchdir

	PTR	sys_fchdir

arch/mips/kernel/scall64-o32.S

+2 −2
Original line number Original line Diff line number Diff line
@@ -293,7 +293,7 @@ sys_call_table: 
	PTR	sys_uselib

	PTR	sys_uselib

	PTR	sys_swapon

	PTR	sys_swapon

	PTR	sys_reboot

	PTR	sys_reboot

	PTR	sys32_readdir

	PTR	compat_sys_old_readdir

	PTR	old_mmap			/* 4090 */

	PTR	old_mmap			/* 4090 */

	PTR	sys_munmap

	PTR	sys_munmap

	PTR	sys_truncate

	PTR	sys_truncate
@@ -345,7 +345,7 @@ sys_call_table: 
	PTR	sys_setfsuid

	PTR	sys_setfsuid

	PTR	sys_setfsgid

	PTR	sys_setfsgid

	PTR	sys32_llseek			/* 4140 */

	PTR	sys32_llseek			/* 4140 */

	PTR	sys32_getdents

	PTR	compat_sys_getdents

	PTR	compat_sys_select

	PTR	compat_sys_select

	PTR	sys_flock

	PTR	sys_flock

	PTR	sys_msync

	PTR	sys_msync