initial import

9 files changed, 281 insertions, 0 deletions

diff --git a/sysdeps/unix/i386/brk.S b/sysdeps/unix/i386/brk.S
new file mode 100644
index 0000000000..f55ac7c775
--- /dev/null
+++ b/sysdeps/unix/i386/brk.S
@@ -0,0 +1,41 @@
+/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdep.h>
+
+#ifndef	SYS_brk
+#define	SYS_brk	17
+#endif
+
+.data
+.globl C_SYMBOL_NAME(__curbrk)
+C_LABEL(__curbrk)
+#ifdef	HAVE_GNU_LD
+	.long C_SYMBOL_NAME(_end)
+#else
+	.long C_SYMBOL_NAME(end)
+#endif
+
+.text
+SYSCALL__ (brk, 1)
+	movl 4(%esp), %eax
+	movl %eax, C_SYMBOL_NAME(__curbrk)
+	xorl %eax, %eax
+	ret
+
+weak_alias (__brk, brk)
diff --git a/sysdeps/unix/i386/fork.S b/sysdeps/unix/i386/fork.S
new file mode 100644
index 0000000000..4388b04fd4
--- /dev/null
+++ b/sysdeps/unix/i386/fork.S
@@ -0,0 +1,30 @@
+/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdep.h>
+
+SYSCALL__ (fork, 0)
+	/* R1 is now 0 for the parent and 1 for the child.  Decrement it to
+	   make it -1 (all bits set) for the parent, and 0 (no bits set)
+	   for the child.  Then AND it with R0, so the parent gets
+	   R0&-1==R0, and the child gets R0&0==0.  */
+	decl r1
+	andl r1, r0
+	ret
+
+weak_alias (__fork, fork)
diff --git a/sysdeps/unix/i386/pipe.S b/sysdeps/unix/i386/pipe.S
new file mode 100644
index 0000000000..7c7c51aa53
--- /dev/null
+++ b/sysdeps/unix/i386/pipe.S
@@ -0,0 +1,28 @@
+/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdep.h>
+
+SYSCALL__ (pipe, 1)
+	movl 4(%esp), scratch
+	movl %eax, (scratch)
+	movl r1, 4(scratch)
+	xorl %eax, %eax
+	ret
+
+weak_alias (__pipe, pipe)
diff --git a/sysdeps/unix/i386/sigreturn.S b/sysdeps/unix/i386/sigreturn.S
new file mode 100644
index 0000000000..3cf79a5415
--- /dev/null
+++ b/sysdeps/unix/i386/sigreturn.S
@@ -0,0 +1,27 @@
+/* Copyright (C) 1992, 1993, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdep.h>
+
+.text
+ENTRY (__sigreturn)
+	addl $4, %esp		/* Pop the return PC.  */
+	DO_CALL (sigreturn, 0)	/* Do the system call; it never returns.  */
+	/* NOTREACHED */
+
+weak_alias (__sigreturn, sigreturn)
diff --git a/sysdeps/unix/i386/start.c b/sysdeps/unix/i386/start.c
new file mode 100644
index 0000000000..e6c89ee3f3
--- /dev/null
+++ b/sysdeps/unix/i386/start.c
@@ -0,0 +1,2 @@
+#define	DUMMIES	dummy0
+#include <sysdeps/unix/start.c>
diff --git a/sysdeps/unix/i386/syscall.S b/sysdeps/unix/i386/syscall.S
new file mode 100644
index 0000000000..5241ee4ac1
--- /dev/null
+++ b/sysdeps/unix/i386/syscall.S
@@ -0,0 +1,28 @@
+/* Copyright (C) 1993 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdep.h>
+
+.globl syscall_error
+ENTRY (syscall)
+	popl %ecx		/* Pop return address into %ecx.  */
+	popl %eax		/* Pop syscall number into %eax.  */
+	pushl %ecx		/* Push back return address.  */
+	.byte 0x9a, 0, 0, 0, 0, 7, 0 /* lcall $7, $0 -- gas bug */
+	jb syscall_error
+	ret
diff --git a/sysdeps/unix/i386/sysdep.S b/sysdeps/unix/i386/sysdep.S
new file mode 100644
index 0000000000..dae7153796
--- /dev/null
+++ b/sysdeps/unix/i386/sysdep.S
@@ -0,0 +1,42 @@
+/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdep.h>
+#define _ERRNO_H
+#include <errnos.h>
+
+.globl C_SYMBOL_NAME(errno)
+.globl syscall_error
+
+#undef syscall_error
+#ifdef NO_UNDERSCORES
+__syscall_error:
+#else
+syscall_error:
+#endif
+#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN
+	/* We translate the system's EWOULDBLOCK error into EAGAIN.
+	   The GNU C library always defines EWOULDBLOCK==EAGAIN.
+	   EWOULDBLOCK_sys is the original number.  */
+	cmpl $EWOULDBLOCK_sys, %eax /* Is it the old EWOULDBLOCK?  */
+	jne notb		/* Branch if not.  */
+	movl $EAGAIN, %eax	/* Yes; translate it to EAGAIN.  */
+#endif
+notb:	movl %eax, C_SYMBOL_NAME(errno)
+	movl $-1, %eax
+	ret
diff --git a/sysdeps/unix/i386/sysdep.h b/sysdeps/unix/i386/sysdep.h
new file mode 100644
index 0000000000..38dd2378b5
--- /dev/null
+++ b/sysdeps/unix/i386/sysdep.h
@@ -0,0 +1,55 @@
+/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdeps/unix/sysdep.h>
+
+#ifdef	ASSEMBLER
+
+#define	ENTRY(name)							      \
+  .globl C_SYMBOL_NAME(name);						      \
+  .align 4;								      \
+  C_LABEL(name)
+
+#ifdef	NO_UNDERSCORES
+/* Since C identifiers are not normally prefixed with an underscore
+   on this system, the asm identifier `syscall_error' intrudes on the
+   C name space.  Make sure we use an innocuous name.  */
+#define	syscall_error	__syscall_error
+#endif
+
+#define	PSEUDO(name, syscall_name, args)				      \
+  .globl syscall_error;							      \
+  ENTRY (name)								      \
+  DO_CALL (syscall_name, args);						      \
+  jb syscall_error
+
+/* This is defined as a separate macro so that other sysdep.h files
+   can include this one and then redefine DO_CALL.  */
+
+#define DO_CALL(syscall_name, args)					      \
+  lea SYS_ify (syscall_name), %eax;					      \
+  /* lcall $7, $0; */							      \
+  /* Above loses; GAS bug.  */						      \
+  .byte 0x9a, 0, 0, 0, 0, 7, 0
+
+#define	r0		%eax	/* Normal return-value register.  */
+#define	r1		%edx	/* Secondary return-value register.  */
+#define scratch 	%ecx	/* Call-clobbered register for random use.  */
+#define MOVE(x,y)	movl x, y
+
+#endif	/* ASSEMBLER */
diff --git a/sysdeps/unix/i386/wait.S b/sysdeps/unix/i386/wait.S
new file mode 100644
index 0000000000..4b2e62ca3b
--- /dev/null
+++ b/sysdeps/unix/i386/wait.S
@@ -0,0 +1,28 @@
+/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdep.h>
+
+SYSCALL__ (wait, 1)
+	movl 4(%esp), scratch	/* Put status pointer in scratch register.  */
+	testl scratch, scratch	/* Is it non-nil?  */
+	je null
+	movl r1, (scratch)	/* Yes; store the status there.  */
+null:	ret
+
+weak_alias (__wait, wait)