initial import

4 files changed, 181 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/i386/linux/socket.S b/sysdeps/unix/sysv/i386/linux/socket.S
new file mode 100644
index 0000000000..9f59bad095
--- /dev/null
+++ b/sysdeps/unix/sysv/i386/linux/socket.S
@@ -0,0 +1,55 @@
+/* Copyright (C) 1991, 1992 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
+
+/* The socket-oriented system calls are handled unusally in Linux.
+   They are all gated through the single `socketcall' system call number.
+   `socketcall' takes two arguments: the first is the subcode, specifying
+   which socket function is being called; and the second is a pointer to
+   the arguments to specific function.
+
+   The .S files for the other calls just #define socket and #include this.  */
+
+ENTRY (socket)
+
+	/* Save registers.  */
+	pushl %ebx
+	pushl %ecx
+
+	movl $__NR_socketcall, %eax	/* System call number in %eax.  */
+
+	/* Use ## so `socket' is a separate token that might be #define'd.  */
+	movl $SYS_##socket, %ebx	/* Subcode is first arg to syscall.  */
+	lea 12(%esp), %ecx		/* Address of args in 2nd arg.  */
+
+        /* Do the system call trap.  */
+	int $0x80
+
+	/* Restore registers.  */
+	popl %ecx
+	popl %ebx
+
+	/* %eax is < 0 if there was an error.  */
+	testl %eax, %eax
+	jl syscall_error
+
+	/* Successful; return the syscall's value.  */
+	ret
diff --git a/sysdeps/unix/sysv/i386/linux/sysdep.S b/sysdeps/unix/sysv/i386/linux/sysdep.S
new file mode 100644
index 0000000000..ed3a2782a9
--- /dev/null
+++ b/sysdeps/unix/sysv/i386/linux/sysdep.S
@@ -0,0 +1,38 @@
+/* Copyright (C) 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>
+
+/* We jump here when a system call gets an error.
+   The error number is negated in %eax.  */
+.globl syscall_error
+syscall_error:
+	negl %eax		/* Make it positive.  */
+#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 %eax, $EWOULDBLOCK_sys /* Is it the old EWOULDBLOCK?  */
+	jne 0f			/* Branch if not.  */
+	move $EAGAIN, %eax	/* Yes; translate it to EAGAIN.  */
+#endif
+0:	movl %eax, _errno	/* Store it in `errno'.  */
+	move $-1, %eax		/* Return -1.  */
+	ret
diff --git a/sysdeps/unix/sysv/i386/linux/sysdep.h b/sysdeps/unix/sysv/i386/linux/sysdep.h
new file mode 100644
index 0000000000..298a0e4c5b
--- /dev/null
+++ b/sysdeps/unix/sysv/i386/linux/sysdep.h
@@ -0,0 +1,57 @@
+/* Copyright (C) 1992, 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 <sysdeps/unix/sysdep.h>
+
+#define	ENTRY(name)							      \
+  .globl _##name;							      \
+  .align 2;								      \
+  _##name##:
+
+#define	PSEUDO(name, syscall_name, args)				      \
+  .text;								      \
+  .globl syscall_error;							      \
+  ENTRY (name)								      \
+    XCHG_##args
+    movl $SYS_##syscall_name, %eax;					      \
+    int $0x80;								      \
+    test %eax, %eax;							      \
+    jl syscall_error;							      \
+    XCHG_##args
+
+/* Linux takes system call arguments in registers:
+   	1: %ebx
+	2: %ecx
+	3: %edx
+	4: %esi
+	5: %edi
+   We put the arguments into registers from the stack,
+   and save the registers, by using the 386 `xchg' instruction
+   to swap the values in both directions.  */
+
+#define	XCHG_0	/* No arguments to frob.  */
+#define	XCHG_1	xchg 8(%esp), %ebx; XCHG_0
+#define	XCHG_2	xchg 12(%esp), %ecx; XCHG_1
+#define	XCHG_3	xchg 16(%esp), %edx; XCHG_2
+#define	XCHG_4	xchg 20(%esp), %esi; XCHG_3
+#define	XCHG_5	xchg 24(%esp), %edi; XCHG_3
+
+#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
diff --git a/sysdeps/unix/sysv/i386/linux/wait.S b/sysdeps/unix/sysv/i386/linux/wait.S
new file mode 100644
index 0000000000..4be64c47c9
--- /dev/null
+++ b/sysdeps/unix/sysv/i386/linux/wait.S
@@ -0,0 +1,31 @@
+/* Copyright (C) 1991, 1992, 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>
+
+ENTRY (__wait)
+	movl 0(%esp), %eax	/* Fetch the return address.  */
+	movl $-1, 0(%esp)	/* First arg is -1.  */
+				/* Second arg is our arg at 4(%esp).  */
+	pushl $0		/* Third arg is 0.  */
+	pushl %eax		/* Push the return address.  */
+
+	/* Jump to waitpid; it will return to our caller.  */
+	jmp ___waitpid
+
+weak_alias (__wait, wait)