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* libc/sys/mmixware/access.c (access): Do not try to use a magic

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file-handle and a direct syscall, just use _open.
	* libc/sys/mmixware/sys/syscall.h (TMPFNO): Remove this magic
	file-handle.

	* libc/sys/mmixware/_exit.c (_exit): Update comment about
	passing on the exit value.
This commit is contained in:
Hans-Peter Nilsson 2007-06-10 12:54:35 +00:00
parent 6fb374754d
commit 32f67ec6ff
4 changed files with 21 additions and 14 deletions
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10
newlib/ChangeLog
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@ -1,3 +1,13 @@
2007-06-10 Hans-Peter Nilsson <hp@bitrange.com>
* libc/sys/mmixware/access.c (access): Do not try to use a magic
file-handle and a direct syscall, just use _open.
* libc/sys/mmixware/sys/syscall.h (TMPFNO): Remove this magic
file-handle.
* libc/sys/mmixware/_exit.c (_exit): Update comment about
passing on the exit value.
2007-06-08 Jeff Johnston <jjohnstn@redhat.com>
* libc/string/strcasestr.c: New file.

8
newlib/libc/sys/mmixware/_exit.c
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@ -18,9 +18,11 @@
void _exit (int n)
{
/* Unfortunately, the return status is not returned by Knuth's mmix
simulator, so it seems in effect ineffective. We set it anyway;
there may be a purpose. */
/* The return status is passed on at exit from the simulator by all
but the oldest versions of Knuth's mmixware simulator. Beware,
"TRAP 0,0,0" is the instruction corresponding to (int32_t) 0 and
the value 0 in $255 is common enough that a program crash jumping
to e.g. uninitialized memory will look like "exit (0)". */
__asm__ ("SET $255,%0\n\tTRAP 0,0,0"
: /* No outputs. */
: "r" (n)

11
newlib/libc/sys/mmixware/access.c
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@ -1,6 +1,6 @@
/* access for MMIXware.
Copyright (C) 2001 Hans-Peter Nilsson
Copyright (C) 2001, 2007 Hans-Peter Nilsson
Permission to use, copy, modify, and distribute this software is
freely granted, provided that the above copyright notice, this notice
@ -24,18 +24,17 @@ access (const char *fn, int flags)
implementations. Opening a directory as a file usually works, so
let's try and open it and use the openability, regardless of what
kind of test or file it is. */
long ret;
int fd;
/* We'll just assume that if we can open the file for reading, then it's
Z-able, no matter what Z was. */
ret = TRAP3f (SYS_Fopen, TMPFNO, fn, BinaryRead);
if (ret == 0)
fd = _open (fn, O_RDONLY);
if (fd >= 0)
{
/* Yes, this was readable. As in other simulator access functions,
we always return success in this case (though the others check
for directory access). */
TRAP1f (SYS_Fclose, TMPFNO);
return 0;
return _close (fd);
}
errno = EACCES;

6
newlib/libc/sys/mmixware/sys/syscall.h
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@ -1,6 +1,6 @@
/* syscall defines for MMIXware.
Copyright (C) 2001, 2002 Hans-Peter Nilsson
Copyright (C) 2001, 2002, 2007 Hans-Peter Nilsson
Permission to use, copy, modify, and distribute this software is
freely granted, provided that the above copyright notice, this notice
@ -42,10 +42,6 @@ enum MMIX_filemode
track of it. A value of 0 denotes a free handle. */
extern unsigned char _MMIX_allocated_filehandle[N_MMIX_FILEHANDLES];
/* We use this file-handle number as a temporary; not used by usual file
I/O. */
#define TMPFNO 127
/* Simulator call with one argument. Also used for zero-argument calls;
pass a zero as ARG1. Make the asm volatile so we can safely ignore the
return-value and only get the benefit from the supposed side-effect