2 * Implementation of various system calls for Linux/PowerPC
4 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
6 * Derived from "arch/i386/kernel/sys_i386.c"
7 * Adapted from the i386 version by Gary Thomas
8 * Modified by Cort Dougan (cort@cs.nmt.edu)
9 * and Paul Mackerras (paulus@cs.anu.edu.au).
11 * This file contains various random system calls that
12 * have a non-standard calling sequence on the Linux/PPC
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
22 #include <linux/errno.h>
23 #include <linux/sched.h>
24 #include <linux/syscalls.h>
27 #include <linux/smp.h>
28 #include <linux/sem.h>
29 #include <linux/msg.h>
30 #include <linux/shm.h>
31 #include <linux/stat.h>
32 #include <linux/mman.h>
33 #include <linux/sys.h>
34 #include <linux/ipc.h>
35 #include <linux/utsname.h>
36 #include <linux/file.h>
37 #include <linux/init.h>
38 #include <linux/personality.h>
40 #include <asm/uaccess.h>
41 #include <asm/syscalls.h>
43 #include <asm/unistd.h>
45 static inline unsigned long do_mmap2(unsigned long addr
, size_t len
,
46 unsigned long prot
, unsigned long flags
,
47 unsigned long fd
, unsigned long off
, int shift
)
49 unsigned long ret
= -EINVAL
;
51 if (!arch_validate_prot(prot
))
55 if (off
& ((1 << shift
) - 1))
60 ret
= sys_mmap_pgoff(addr
, len
, prot
, flags
, fd
, off
);
65 unsigned long sys_mmap2(unsigned long addr
, size_t len
,
66 unsigned long prot
, unsigned long flags
,
67 unsigned long fd
, unsigned long pgoff
)
69 return do_mmap2(addr
, len
, prot
, flags
, fd
, pgoff
, PAGE_SHIFT
-12);
72 unsigned long sys_mmap(unsigned long addr
, size_t len
,
73 unsigned long prot
, unsigned long flags
,
74 unsigned long fd
, off_t offset
)
76 return do_mmap2(addr
, len
, prot
, flags
, fd
, offset
, PAGE_SHIFT
);
81 * Due to some executables calling the wrong select we sometimes
82 * get wrong args. This determines how the args are being passed
83 * (a single ptr to them all args passed) then calls
84 * sys_select() with the appropriate args. -- Cort
87 ppc_select(int n
, fd_set __user
*inp
, fd_set __user
*outp
, fd_set __user
*exp
, struct timeval __user
*tvp
)
89 if ( (unsigned long)n
>= 4096 )
91 unsigned long __user
*buffer
= (unsigned long __user
*)n
;
92 if (!access_ok(VERIFY_READ
, buffer
, 5*sizeof(unsigned long))
93 || __get_user(n
, buffer
)
94 || __get_user(inp
, ((fd_set __user
* __user
*)(buffer
+1)))
95 || __get_user(outp
, ((fd_set __user
* __user
*)(buffer
+2)))
96 || __get_user(exp
, ((fd_set __user
* __user
*)(buffer
+3)))
97 || __get_user(tvp
, ((struct timeval __user
* __user
*)(buffer
+4))))
100 return sys_select(n
, inp
, outp
, exp
, tvp
);
105 long ppc64_personality(unsigned long personality
)
109 if (personality(current
->personality
) == PER_LINUX32
110 && personality
== PER_LINUX
)
111 personality
= PER_LINUX32
;
112 ret
= sys_personality(personality
);
113 if (ret
== PER_LINUX32
)
119 long ppc_fadvise64_64(int fd
, int advice
, u32 offset_high
, u32 offset_low
,
120 u32 len_high
, u32 len_low
)
122 return sys_fadvise64(fd
, (u64
)offset_high
<< 32 | offset_low
,
123 (u64
)len_high
<< 32 | len_low
, advice
);
126 void do_show_syscall(unsigned long r3
, unsigned long r4
, unsigned long r5
,
127 unsigned long r6
, unsigned long r7
, unsigned long r8
,
128 struct pt_regs
*regs
)
130 printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p"
131 " cpu=%d\n", regs
->gpr
[0], r3
, r4
, r5
, r6
, r7
, r8
, regs
,
132 current
, smp_processor_id());
135 void do_show_syscall_exit(unsigned long r3
)
137 printk(" -> %lx, current=%p cpu=%d\n", r3
, current
, smp_processor_id());
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