Initial sparc port, thanks to Mathew Bosworth <mbosworth@metaflow.com>,

who sent this to me a month ago and I forgot to check it in.  Oops.
Better late then never.
 -Erik

libc/sysdeps/linux/sparc/Makefile

@@ -28,10 +28,12 @@ ASFLAGS=$(CFLAGS)
 CRT0=crt0.S
 CRT0_OBJ=$(patsubst %.S,%.o, $(CRT0))
 
-SSRC=
+SSRC=__longjmp.S setjmp.S vfork.S
+#SSRC=__longjmp.S _start.S setjmp.S vfork.S
 SOBJS=$(patsubst %.S,%.o, $(SSRC))
 
-CSRC=
+CSRC=fork.c ptrace.c 
+#CSRC=fork.c ptrace.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 
 OBJS=$(SOBJS) $(MOBJ) $(COBJS)

libc/sysdeps/linux/sparc/__longjmp.S

@@ -0,0 +1,92 @@
+/* Copyright (C) 1991, 93, 96, 97, 98, 99, 2000 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Code taken from glibc/sysdeps/sparc/sparc32/  (glibc 2.2.2) */
+
+//#include "sysdep.h"
+#include <sysdep.h>
+
+#define _ASM 1
+#define _SETJMP_H
+#include <bits/setjmp.h>
+#define ENV(base,reg) [%base + (reg * 4)]
+#define ST_FLUSH_WINDOWS 3
+#define RW_FP [%fp + 0x48]
+
+ENTRY(__longjmp)
+	/* Store our arguments in global registers so we can still
+	   use them while unwinding frames and their register windows.  */
+
+	ld ENV(o0,JB_FP), %g3	/* Cache target FP in register %g3.  */
+	mov %o0, %g1		/* ENV in %g1 */
+     	orcc %o1, %g0, %g2	/* VAL in %g2 */
+     	be,a 0f			/* Branch if zero; else skip delay slot.  */
+	 mov 1, %g2		/* Delay slot only hit if zero: VAL = 1.  */
+0:
+	xor %fp, %g3, %o0
+	add %fp, 512, %o1
+	andncc %o0, 4095, %o0
+	bne thread
+	//bne LOC(thread)
+	 cmp %o1, %g3
+	bl thread
+	//bl LOC(thread)
+
+	/* Now we will loop, unwinding the register windows up the stack
+	   until the restored %fp value matches the target value in %g3.  */
+
+//LOC(loop):
+loop:
+	cmp %fp, %g3		/* Have we reached the target frame? */
+	bl,a loop		/* Loop while current fp is below target.  */
+	//bl,a LOC(loop)	/* Loop while current fp is below target.  */
+	 restore		/* Unwind register window in delay slot.  */
+	be,a found		/* Better have hit it exactly.  */
+	//be,a LOC(found)	/* Better have hit it exactly.  */
+	 ld ENV(g1,JB_SP), %o0	/* Delay slot: extract target SP.  */
+
+thread:
+//LOC(thread):
+	/*
+	 * Do a "flush register windows trap".  The trap handler in the
+	 * kernel writes all the register windows to their stack slots, and
+	 * marks them all as invalid (needing to be sucked up from the
+	 * stack when used).  This ensures that all information needed to
+	 * unwind to these callers is in memory, not in the register
+	 * windows.
+	 */
+	ta	ST_FLUSH_WINDOWS
+	ld	ENV(g1,JB_PC), %o7 /* Set return PC. */
+	ld	ENV(g1,JB_SP), %fp /* Set saved SP on restore below. */
+	sub	%fp, 64, %sp	/* Allocate a register frame. */
+	st	%g3, RW_FP	/* Set saved FP on restore below. */
+	retl
+	 restore %g2, 0, %o0	/* Restore values from above register frame. */
+
+found:
+//LOC(found):
+	/* We have unwound register windows so %fp matches the target.  */
+	mov %o0, %sp		/* OK, install new SP.  */
+
+//LOC(sp_ok):
+sp_ok:
+	ld ENV(g1,JB_PC), %o0	/* Extract target return PC.  */
+	jmp %o0 + 8		/* Return there.  */
+	 mov %g2, %o0		/* Delay slot: set return value.  */
+
+END(__longjmp)

libc/sysdeps/linux/sparc/bits/select.h

@@ -20,6 +20,13 @@
 # error "Never use <bits/select.h> directly; include <sys/select.h> instead."
 #endif
 
+/* For some reason, this wants to use the definitions from 
+	/include/asm/posix_types.h  So we have to undef some symbols : 
+*/
+#undef __FD_ZERO
+#undef __FD_SET
+#undef __FD_CLR
+#undef __FD_ISSET
 
 /* We don't use `memset' because this would require a prototype and
    the array isn't too big.  */

libc/sysdeps/linux/sparc/crt0.S

@@ -0,0 +1,90 @@
+/*
+ * xrt0.s for ERC32. 
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 675
+ * Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/* code taken from leonccs 1.0 leon/src/libio/crt0.S 
+	I don't know if this is available anymore, now that LECCS
+	is out.  And I'm not sure if this source is in the LECCS distro  :(
+*/
+
+	.text
+! Original : 
+!	.global __start, _main
+! uC-libc version : 
+	.global _start
+	.global __uClibc_main
+
+! Start the real-time clock with a tick of 14 clocks
+!
+
+_start:
+
+	save	%sp, -64, %sp
+
+        /* clear the bss */
+ 
+        sethi %hi(edata),%g2
+        or    %g2,%lo(edata),%g2  ! g2 = start of bss
+        sethi %hi(_end),%g3
+        or    %g3,%lo(_end),%g3         ! g3 = end of bss
+        mov   %g0,%g1                   ! so std has two zeros
+zerobss:
+        std    %g0,[%g2]
+        add    %g2,8,%g2
+        cmp    %g2,%g3
+        bleu,a zerobss
+        nop
+
+        /* move data segment to proper location */
+ 
+relocd:
+        set (_endtext),%g2 		! g2 = start of data in aout file
+        set (_environ),%g4		! g4 = start of where data should go
+        set (_edata),%g3 		! g3 = end of where data should go
+	subcc	%g3, %g4, %g5		! g5 = length of data
+
+	subcc	%g4, %g2, %g0		! need to relocate data ?
+	ble	initok
+	ld	[%g4], %g6
+!	subcc	%g6, 1, %g0
+!	be	initok
+mvdata:
+	subcc	%g5, 8, %g5
+	ldd	[%g2 + %g5], %g6
+	bg	mvdata
+        std    	%g6, [%g4 + %g5]
+
+initok:
+
+!	call    _main
+	call	__uClibc_main
+        nop
+! Should not return from uClibc main()
+!	ret
+!	nop
+
+        .seg    "data"
+        .global .bdata
+.bdata:
+        .align  8
+        .global _environ                ! first symbol in sdata
+_environ:
+        .word   1
+
+
+

libc/sysdeps/linux/sparc/fork.c

@@ -0,0 +1,35 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * fork for uClibc
+ *
+ * Copyright (C) 2000 by Lineo, inc.  Written by Erik Andersen
+ * <andersen@lineo.com>, <andersee@debian.org>
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <errno.h>
+#include <features.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+#ifndef __HAS_NO_MMU__
+
+//#define __NR_fork             2
+#include <unistd.h>
+_syscall0(pid_t, fork);
+
+#endif

libc/sysdeps/linux/sparc/setjmp.S

@@ -0,0 +1,53 @@
+/* Copyright (C) 1991, 93, 94, 96, 97, 98 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Code taken from glibc2.2.2/sysdeps/sparc/sparc32/setjmp.S */
+
+#include <sysdep.h>
+#include <sys/trap.h>
+
+#define _ASM 1
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+ENTRY(_setjmp)
+	b	1f
+	 set	0, %o1
+END(_setjmp)
+
+ENTRY(setjmp)
+	set	1, %o1
+END(setjmp)
+
+ENTRY (__sigsetjmp)
+1:
+	/* Save our PC, SP and FP.  Save the signal mask if requested with
+	   a tail-call for simplicity; it always returns zero.  */
+	ta	ST_FLUSH_WINDOWS
+
+	st	%o7, [%o0 + (JB_PC * 4)]
+	st	%sp, [%o0 + (JB_SP * 4)]
+	st	%fp, [%o0 + (JB_FP * 4)]
+
+	mov	%o7, %g1
+	call	__sigjmp_save
+	 mov	%g1, %o7
+END(__sigsetjmp)
+
+//weak_extern(_setjmp)
+//weak_extern(setjmp)

libc/sysdeps/linux/sparc/sysdep.h

@@ -0,0 +1,134 @@
+/* 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 <sys/syscall.h>
+
+/* Not that using a `PASTE' macro loses.  */
+#ifdef	__STDC__
+
+#ifdef __ELF__
+
+#define SYSCALL_WEAK_ALIAS(alias,orig) \
+	.weak alias; \
+	alias=__libc_##orig
+
+/*
+#ifdef _POSIX_THREADS
+*/
+
+#if 1
+
+#ifdef PTHREAD_KERNEL
+
+/* Use the regular ELF conventions about underscores, and provide the
+   weak symbol, as required */
+#define	SYSCALL__(name,args)	PSEUDO (__machdep_sys_##name, name, args) \
+.weak machdep_sys_##name; \
+  machdep_sys_##name = __machdep_sys_##name; \
+.type __machdep_sys_##name,@function; \
+.type machdep_sys_##name,@function; \
+.L__machdep_sys_##name##end: .size __machdep_sys_##name,.L__machdep_sys_##name##end - __machdep_sys_##name
+
+#define	SYSCALL(name,args)	PSEUDO (__machdep_sys_##name, name, args) \
+.weak machdep_sys_##name; \
+  machdep_sys_##name = __machdep_sys_##name; \
+.type __machdep_sys_##name,@function; \
+.type machdep_sys_##name,@function; \
+.L__machdep_sys_##name##end: .size __machdep_sys_##name,.L__machdep_sys_##name##end - __machdep_sys_##name
+
+#else /* PTHREAD_KERNEL */
+
+/* Use the regular ELF conventions about underscores, and provide the
+   weak symbol, as required */
+#define	SYSCALL__(name,args)	PSEUDO (__libc_##name, name, args) \
+.weak __##name; \
+.weak name;  \
+  __##name = __libc_##name; \
+  name = __libc_##name; \
+.type __libc_##name,@function; \
+.type name,@function; \
+.type __##name,@function; \
+.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name
+
+#define	SYSCALL(name,args)	PSEUDO (__libc_##name, name, args) \
+.weak name; \
+  name = __libc_##name; \
+.type __libc_##name,@function; \
+.type name,@function; \
+.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name
+
+#endif /* PTHREAD_KERNEL */
+
+#else /* _POSIX_THREADS */
+
+/* Use the regular ELF conventions about underscores, and provide the
+   weak symbol, as required */
+#define	SYSCALL__(name,args)	PSEUDO (__libc_##name, name, args) \
+.weak name;  \
+  __##name = __libc_##name; \
+  name = __libc_##name; \
+.type __libc_##name,@function; \
+.type name,@function; \
+.type __##name,@function; \
+.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name
+
+#define	SYSCALL(name,args)	PSEUDO (__libc_##name, name, args) \
+  name = __libc_##name; \
+.type __libc_##name,@function; \
+.type name,@function; \
+.L__libc_##name##end: .size __libc_##name,.L__libc_##name##end - __libc_##name
+
+#endif /* _POSIX_THREADS */
+
+#else /* __ELF__ */
+
+#define SYSCALL_WEAK_ALIAS(alias,orig)
+
+/* Regular a.out definition */
+#define	SYSCALL__(name,args)	PSEUDO (__##name, name, args)
+#define	SYSCALL(name,args)	PSEUDO (name, name, args)
+
+#endif /* __ELF__ */
+
+#else  /* __STDC__ */
+
+#define	SYSCALL__(name,args)	PSEUDO (__/**/name, name, args)
+#define	SYSCALL(name,args)	PSEUDO (name, name, args)
+
+#endif /* __STDC__ */
+
+/* Machine-dependent sysdep.h files are expected to define the macro
+   PSEUDO (function_name, syscall_name) to emit assembly code to define the
+   C-callable function FUNCTION_NAME to do system call SYSCALL_NAME.
+   r0 and r1 are the system call outputs.  movl should be defined as
+   an instruction such that "movl r1, r0" works.  ret should be defined
+   as the return instruction.  */
+
+
+#if !defined(HAVE_GNU_LD) && !defined (__ELF__)
+#define	 ___errno	_errno
+#endif
+
+#define	HAVE_SYSCALLS
+
+#define ENTRY(name)
+	.global name;
+	.align 4;
+
+#define END(name)
+	.size name,.-name;

libc/sysdeps/linux/sparc/vfork.S

@@ -0,0 +1,30 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jj@ultra.linux.cz>, 1999.
+
+   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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* Code taken from glibc2.2.2/sysdeps/unix/sysv/linux/sparc/vfork.S */
+
+#include <sysdep.h>
+
+PSEUDO (__vfork, vfork, 0)
+	sub	%o1, 1, %o1
+	retl
+	 and	%o0, %o1, %o0
+
+PSEUDO_END (__vfork)
+weak_alias (__vfork, vfork)