2001-01-18 Jeff Johnston <jjohnstn@redhat.com>

* libc/sys/arc/Makefile.am: New file.
        * libc/sys/arc/Makefile.in: Ditto.
        * libc/sys/arc/aclocal.m4: Ditto.
        * libc/sys/arc/configure: Ditto.
        * libc/sys/arc/configure.in: Ditto.
        * libc/sys/arc/crt0.S: Ditto.
        * libc/sys/arc/isatty.c: Ditto.
        * libc/sys/arc/mem-layout.c: Ditto.
        * libc/sys/arc/sbrk.c: Ditto.
        * libc/sys/arc/syscalls.c: Ditto.
        * libc/sys/arc/sys/syscall.h: Ditto.
This commit is contained in:
Jeff Johnston 2001-01-19 01:25:13 +00:00
parent 74a3cd0a4f
commit a302b48c21
12 changed files with 2647 additions and 0 deletions

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@ -1,3 +1,17 @@
2001-01-18 Jeff Johnston <jjohnstn@redhat.com>
* libc/sys/arc/Makefile.am: New file.
* libc/sys/arc/Makefile.in: Ditto.
* libc/sys/arc/aclocal.m4: Ditto.
* libc/sys/arc/configure: Ditto.
* libc/sys/arc/configure.in: Ditto.
* libc/sys/arc/crt0.S: Ditto.
* libc/sys/arc/isatty.c: Ditto.
* libc/sys/arc/mem-layout.c: Ditto.
* libc/sys/arc/sbrk.c: Ditto.
* libc/sys/arc/syscalls.c: Ditto.
* libc/sys/arc/sys/syscall.h: Ditto.
Wed Jan 17 23:20:56 2001 Christopher Faylor <cgf@cygnus.com> Wed Jan 17 23:20:56 2001 Christopher Faylor <cgf@cygnus.com>
* libc/include/sys/unistd.h: Use correct declaration for setdtablesize. * libc/include/sys/unistd.h: Use correct declaration for setdtablesize.

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@ -0,0 +1,14 @@
## Process this file with automake to generate Makefile.in
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lib_a_SOURCES = isatty.c mem-layout.c sbrk.c syscalls.c
all: crt0.o
ACLOCAL_AMFLAGS = -I ../../..
CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host

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# Makefile.in generated automatically by automake 1.3 from Makefile.am
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# This program is distributed in the hope that it will be useful,
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maintainer-clean-compile tags mostlyclean-tags distclean-tags \
clean-tags maintainer-clean-tags distdir info dvi installcheck \
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282
newlib/libc/sys/arc/aclocal.m4 vendored Normal file
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@ -0,0 +1,282 @@
dnl aclocal.m4 generated automatically by aclocal 1.4
dnl Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY, to the extent permitted by law; without
dnl even the implied warranty of MERCHANTABILITY or FITNESS FOR A
dnl PARTICULAR PURPOSE.
dnl This provides configure definitions used by all the newlib
dnl configure.in files.
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dnl newlib directory.
AC_DEFUN(NEWLIB_CONFIGURE,
[
dnl Default to --enable-multilib
AC_ARG_ENABLE(multilib,
[ --enable-multilib build many library versions (default)],
[case "${enableval}" in
yes) multilib=yes ;;
no) multilib=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
esac], [multilib=yes])dnl
dnl Support --enable-target-optspace
AC_ARG_ENABLE(target-optspace,
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yes) target_optspace=yes ;;
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dnl Support --enable-newlib-mb
AC_ARG_ENABLE(newlib-mb,
[ --enable-newlib-mb enable multibyte support],
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yes) newlib_mb=yes ;;
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AC_CANONICAL_BUILD
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AC_EXEEXT
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/* | [A-Za-z]:[/\\]*) newlib_flagbasedir=[$]{newlib_basedir} ;;
*) newlib_flagbasedir='[$](top_builddir)/'[$]{newlib_basedir} ;;
esac
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*-*-cygwin*)
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# directory).
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)
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:
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dnl This is the newlib/libc/sys/arc configure.in file.
dnl Process this file with autoconf to produce a configure script.
AC_PREREQ(2.5)
AC_INIT(isatty.c)
dnl Can't be done in NEWLIB_CONFIGURE because that confuses automake.
AC_CONFIG_AUX_DIR(../../../..)
NEWLIB_CONFIGURE(../../..)
AC_OUTPUT(Makefile)

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; ARC start up file
; In the absence of a custom linker script, go with something simple.
; We do not support passing arguments to "main", but this is an embedded
; system anyway.
;
; We call init/fini here without cpu prefixes because there is always
; only one .init/.fini section per image.
.section .text
.align 4
.global start
start:
mov sp,end ; Round "sp" up to page after "end".
add sp,sp,4095
and sp,sp,-4096
ld r8,[stack_size] ; Add stack size to "sp".
add sp,sp,r8
st sp,[sbrk_start] ; Initialize malloc heap.
st sp,[sbrk_loc]
sub sp,sp,16 ; callee expects 16 bytes already "pushed".
mov fp,0 ; Top of stack frame indicator.
mov r0,edata ; Zero bss.
mov r2,end
sub r2,r2,r0
mov r1,0
#ifdef __base__
bl.nd _memset
bl.nd init ; .init section entry point.
mov r0,%st(fini) ; .fini section entry point.
bl.nd _atexit
mov r0,0 ; argc
mov r1,0 ; argv
bl.nd _main
bl.nd _exit
#endif
#ifdef __host__
bl.nd _host_memset
bl.nd init ; .init section entry point.
mov r0,%st(fini) ; .fini section entry point.
bl.nd _host_atexit
mov r0,0 ; argc
mov r1,0 ; argv
bl.nd _host_main
bl.nd _host_exit
#endif
#ifdef __graphics__
bl.nd _graphics_memset
bl.nd init ; .init section entry point.
mov r0,%st(fini) ; .fini section entry point.
bl.nd _graphics_atexit
mov r0,0 ; argc
mov r1,0 ; argv
bl.nd _graphics_main
bl.nd _graphics_exit
#endif
#ifdef __audio__
bl.nd _audio_memset
bl.nd init ; .init section entry point.
mov r0,%st(fini) ; .fini section entry point.
bl.nd _audio_atexit
mov r0,0 ; argc
mov r1,0 ; argv
bl.nd _audio_main
bl.nd _audio_exit
#endif

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@ -0,0 +1,17 @@
/* isatty.c */
/* Dumb implementation so programs will at least run. */
#include <sys/stat.h>
int
isatty (int fd)
{
struct stat buf;
if (fstat (fd, &buf) < 0)
return 0;
if (S_ISCHR (buf.st_mode))
return 1;
return 0;
}

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@ -0,0 +1,21 @@
/* Ideally this kind of stuff is specified in a linker script. It's not clear
what the default linker script should do, so for now we have this. */
/* Keep this file separate from sbrk.c so the programmer can supply his/her
own _sbrk_r. This file could go in crt0.S, but I want to keep this in C.
This is all just an experiment anyway. */
#ifndef STACK_SIZE
/* Cache lines recycle at 4096 I think, and 4096 is listed as the page size,
so we make the stack size a multiple of it. Not that it's relevant or
anything, but why not base it on *something*? */
#define STACK_SIZE (4096 * 4)
#endif
int stack_size asm ("stack_size") = STACK_SIZE;
#ifndef SBRK_SIZE
#define SBRK_SIZE (4096 * 32)
#endif
int sbrk_size asm ("sbrk_size") = SBRK_SIZE;

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/* sbrk support */
/* The current plan is to have one sbrk handler for all cpus.
Hence use `asm' for each global variable here to avoid the cpu prefix.
We can't intrude on the user's namespace (another reason to use asm). */
#include <sys/types.h>
#include <sys/syscall.h>
#include <errno.h>
#include <stddef.h>
/* These variables are publicly accessible for debugging purposes.
The user is also free to set sbrk_size to something different.
See mem-layout.c. */
extern int sbrk_size asm ("sbrk_size");
caddr_t sbrk_start asm ("sbrk_start");
caddr_t sbrk_loc asm ("sbrk_loc");
/*caddr_t _sbrk_r (struct _reent *, size_t) asm ("__sbrk_r");*/
/* FIXME: We need a semaphore here. */
caddr_t
_sbrk_r (struct _reent *r, size_t nbytes)
{
caddr_t result;
if (
/* Ensure we don't underflow. */
sbrk_loc + nbytes < sbrk_start
/* Ensure we don't overflow. */
|| sbrk_loc + nbytes > sbrk_start + sbrk_size)
{
errno = ENOMEM;
return ((caddr_t) -1);
}
result = sbrk_loc;
sbrk_loc += nbytes;
return result;
}

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/* ARC system call interface */
/* A special version of the flag insn is used to distinguish syscalls from
breakpoints (a breakpoint might be set at the same place).
The upper 23 bits of the argument to a flag insn are not currently used.
By convention, bit 31 is one to indicate this is a specially coded operand.
The next 15 bits (bits 30-16) can be used for software purposes.
The format isn't documented yet, so the pattern we use here may change. */
#define SYSCALL_MARKER 0x80010000
#define SYSCALL_MAGIC 0x61082300
/* Perform a system call.
If ERR is 0, it succeeded. Otherwise it is a positive value for errno. */
#define SYSCALL(op, rc, err, r0, r1, r2) \
asm volatile ( "\
mov r0,%2\n\t \
mov r1,%3\n\t \
mov r2,%4\n\t \
mov r3,%5\n\t \
mov r4,%6\n\t \
flag %7\n\t \
nop\n\t \
nop\n\t \
nop\n\t \
mov %0,r0\n\t \
mov %1,r1" \
: "=r" (rc), "=r" (err) \
: "i" (SYSCALL_MAGIC), "r" (op), "r" (r0), "r" (r1), "r" (r2), \
"i" (1 | SYSCALL_MARKER) \
: "r0", "r1", "r2", "r3", "r4");
#define SYS_exit 1
#define SYS_open 2
#define SYS_close 3
#define SYS_read 4
#define SYS_write 5
#define SYS_lseek 6
#define SYS_link 7
#define SYS_unlink 8
#define SYS_chdir 9
#define SYS_chmod 10
#define SYS_stat 11
#define SYS_fstat 12
#define SYS_access 13
#define SYS_getpid 14
#define SYS_kill 15
#define SYS_time 16
#define SYS_MAX 17

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#include <sys/types.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <_ansi.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <reent.h>
_ssize_t
_read_r (struct _reent *r, int fd, void *buf, size_t nbytes)
{
int err;
_ssize_t rc;
SYSCALL (SYS_read, rc, err, fd, buf, nbytes);
if (err)
errno = err;
return rc;
}
_ssize_t
_write_r (struct _reent *r, int fd, const void *buf, size_t nbytes)
{
int err;
_ssize_t rc;
SYSCALL (SYS_write, rc, err, fd, buf, nbytes);
if (err)
errno = err;
return rc;
}
/* FIXME: The prototype in <fcntl.h> for open() uses ...,
but reent.h uses int. */
int
_open_r (struct _reent *r, const char *buf, int flags, int mode)
{
int rc,err;
#if 0
int mode;
va_list ap;
va_start (ap, flags);
mode = va_arg (ap, int);
va_end (ap);
#endif
SYSCALL (SYS_open, rc, err, buf, flags, mode);
errno = err;
return rc;
}
int
_close_r (struct _reent *r, int fd)
{
int rc,err;
SYSCALL (SYS_close, rc, err, fd, 0, 0);
if (err)
errno = err;
return rc;
}
off_t
_lseek_r (struct _reent *r, int fd, off_t offset, int whence)
{
int err;
off_t rc;
SYSCALL (SYS_lseek, rc, err, fd, offset, whence);
if (err)
errno = err;
return rc;
}
int
_fstat_r (struct _reent *r, int fd, struct stat *buf)
{
int rc,err;
SYSCALL (SYS_fstat, rc, err, fd, buf, 0);
if (err)
errno = err;
return rc;
}
/* FIXME: Shouldn't this be _exit_r? */
void
_exit (int ret)
{
int rc,err;
SYSCALL (SYS_exit, rc, err, ret, 0, 0);
/* If that failed, use an infinite loop. */
while (1)
continue;
}
time_t
_time (time_t *timer)
{
return 0;
}
int
_creat_r (struct _reent *r, const char *path, int mode)
{
return _open_r (r, path, O_CREAT | O_TRUNC, mode);
}
int
_getpid_r (struct _reent *r)
{
return 42;
}
int
_kill_r (struct _reent *r, int pid, int sig)
{
int rc,err;
SYSCALL (SYS_kill, rc, err, pid, sig, 0);
if (err)
errno = err;
return rc;
}