first whack at ldasm.S... this will not work yet (partially based on NetBSD,

partially based on alpha)

1 files changed, 369 insertions, 0 deletions

diff --git a/libexec/ld.so/sparc64/ldasm.S b/libexec/ld.so/sparc64/ldasm.S
new file mode 100644
index 00000000000..67148b06b67
--- /dev/null
+++ b/libexec/ld.so/sparc64/ldasm.S
@@ -0,0 +1,369 @@
+/*	$OpenBSD: ldasm.S,v 1.1 2001/09/21 14:52:45 jason Exp $	*/
+/*	$NetBSD: rtld_start.S,v 1.5 2001/08/14 22:17:48 eeh Exp $	*/
+	
+/*
+ * Copyright (c) 2001 Jason L. Wright (jason@thought.net)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Jason L. Wright
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*-
+ * Copyright (c) 2000 Eduardo Horvath.
+ * Copyright (c) 1999 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas and Paul Kranenburg.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/syscall.h>
+#include <machine/trap.h>
+#include <machine/asm.h>
+#define	_LOCORE
+#include <machine/frame.h>
+
+/*
+ * ELF:
+ *	On startup the stack should contain 16 extended word register save area,
+ *	followed by the arg count, etc.
+ *
+ * _rtld() expects the stack pointer to point to two longwords for argument
+ *	return followed by argc, etc.  We need to create a pointer to
+ *	&argc + 16 and pass that in.  The return args will be in those locations.
+ * 
+ * NB:	We are violating the ELF spec by passing a pointer to the ps strings in
+ * 	%g1 instead of a termination routine.
+ */
+	
+/* Offset of ARGC from bottom of stack */
+#define	ARGC	(16*8)
+
+	.section	".text"
+	.align	16
+	.global	_dl_start
+	.type	_dl_start,@function
+_dl_start:
+	sub	%g0, %g0, %fp		! clear frame
+	mov	%g1, %l1		! save ps_strings
+	sub	%sp, 16, %sp		! make room for return args
+	add	%sp, BIAS+ARGC, %l0	! l0 points to bottom of stack
+
+	ldx	[%l0], %l3		! argc
+	sllx	%l3, 3, %l3		! argc *= sizeof(long)
+
+	addx	%l0, 8, %o0		! argv = [%l0 + 8]
+
+	addx	%l0, 16, %o1		! envp = %l0 + 16 +
+	addx	%o1, %l3, %o1		!	+ argc
+
+	! XXX loff ???
+
+	mov	%o1, %o4		! %o3 = my_envp
+1:
+	ldx	[%o4 + 0], %l2		! while ((*my_envp)
+	subxcc	%l2, %g0, %g0		!   != NULL)
+	bnz	1b			!	my_envp++;
+	 addx	%o4, 8, %o4		! %o4 == dynp
+
+	call	_dl_boot		! _dl_boot(argv,envp,loff,dynp,dl_data)
+	 nop
+
+	add	%sp, 16, %sp		! restore stack
+	mov	%l1, %g1		! restore ps_strings
+
+	jmp	%o0
+	 nop
+
+	/*
+	 * We have two separate entry points to the runtime linker.
+	 * I'm implementing this following the SPARC v9 ABI spec.
+	 *
+	 * _rtld_bind_start_0(x, y) is called from .PLT0, and is used for
+	 * PLT entries above 32768.
+	 *
+	 * _rtld_bind_start_1(x, y) is called from .PLT1, and is used for
+	 * PLT entries below 32768.
+	 *
+	 * The first two entries of PLT2 contain the xword object pointer.
+	 *
+	 * These routines are called with two longword arguments, 
+	 * x and y.  To calculate the address of the entry,
+	 * _rtld_bind_start_1(x, y) does:
+	 *
+	 *	n = x >> 15;
+	 *
+	 * and _rtld_bind_start_0(x, y) does:
+	 *
+	 *	i = x - y + 1048596;
+	 *	n = 32768 + (i/5120)*160 + (i%5120)/24;
+	 *
+	 * Neither routine needs to issue a save since it's already been
+	 * done in the PLT entry.
+	 */
+
+	/* NOTE: _rtld_bind_start_0 is untested.  Hence the debug stuff */
+	
+	.section	".text"
+	.align	4
+	.global	_rtld_bind_start_0
+	.type	_rtld_bind_start_0,@function
+_rtld_bind_start_0:	# (x, y)
+#if 0
+	call	_rtld_bind_start_0_stub
+	 ldx     [%o1 + (10*4)], %l7
+	mov	%o0, %l5
+	
+	sllx	%l5, 1, %l6		/* Each element is an Elf_Rela which */
+	add	%l6, %l5, %l5		/*  is 3 longwords or 24 bytes. */
+	sllx	%l5, 3, %o1		/*  So multiply by 24. */
+	
+	call	_rtld_bind
+	 mov	%l7, %o0
+#else
+	sethi	%hi(1048596), %l1
+	sub	%o0, %o1, %l0		/* x - y */
+	or	%l1, %lo(1048596), %l1
+	add	%l0, %l1, %l0		/* x - y + 1048596 */
+
+	sdivx	%l0, 5120, %l1		/* Calculate i/5120 */
+	ldx	[%o1 + (10*4)], %o0	/* Load object pointer from PLT2 */
+	sub	%l0, %l1, %l2		/* And i%5120 */
+	
+	/* Let the division churn for a bit. */
+	sdivx	%l2, 14, %l4		/* (i%5120)/24 */
+
+	/* 160 is (32 * 5) or (32 * (4 + 1)) */
+	sllx	%l1, 2, %l3		/* 4 * (i/5120) */
+	add	%l1, %l3, %l3		/* 5 * (i/5120) */
+	sllx	%l3, 5, %l3		/* 32 * 5 * (i/5120) */
+
+	sethi	%hi(32768), %l6
+	add	%l3, %l4, %l5		/* %l5 = (i/5120)*160 + (i%5120)/24; */
+	add	%l5, %l6, %l5
+	
+	sllx	%l5, 1, %l6		/* Each element is an Elf_Rela which */
+	add	%l6, %l5, %l5		/*  is 3 longwords or 24 bytes. */
+	sllx	%l5, 3, %l5		/*  So multiply by 24. */
+	
+	call	_rtld_bind		/* Call _rtld_bind(obj, offset) */
+	 mov	%l5, %o1
+
+	jmp	%o0			/* return value == function address */
+	 restore			/* Dump our stack frame */
+#endif	
+	
+	.section	".text"
+	.align	4
+	.global	_rtld_bind_start_1
+	.type	_rtld_bind_start_1,@function
+_rtld_bind_start_1:	# (x, y)
+	srax	%o0, 15, %o2		/* %o0 is the index to our PLT slot */
+	
+	sllx	%o2, 1, %o3		/* Each element is an Elf_Rela which */
+	add	%o3, %o2, %o2		/*  is 3 longwords or 24 bytes. */
+	sllx	%o2, 3, %o2		/*  So multiply by 24. */
+	
+	ldx	[%o1 + 8], %o0		/* The object pointer is at [%o1 + 8] */
+	
+	call	_rtld_bind		/* Call _rtld_bind(obj, offset) */
+	 mov	%o2, %o1
+
+	jmp	%o0			/* return value == function address */
+	 restore			/* Dump our stack frame */
+	
+
+	.section ".text"
+	.align 4
+	.global _dl_close
+	.type _dl_close,@function
+_dl_close:
+	mov SYS_close | SYSCALL_G2RFLAG, %g1	! call sys_close
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_exit
+	.type _dl_exit,@function
+_dl_exit:
+	mov SYS_exit | SYSCALL_G2RFLAG, %g1	! call sys_exit
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_getegid
+	.type _dl_getegid,@function
+_dl_getegid:
+	mov SYS_getegid | SYSCALL_G2RFLAG, %g1	! call sys_exit
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_geteuid
+	.type _dl_geteuid,@function
+_dl_geteuid:
+	mov SYS_geteuid | SYSCALL_G2RFLAG, %g1	! call sys_exit
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_getgid
+	.type _dl_getgid,@function
+_dl_getgid:
+	mov SYS_getgid | SYSCALL_G2RFLAG, %g1	! call sys_exit
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_getuid
+	.type _dl_getuid,@function
+_dl_getuid:
+	mov SYS_getuid | SYSCALL_G2RFLAG, %g1	! call sys_exit
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_mmap
+	.type _dl_mmap,@function
+_dl_mmap:
+	mov SYS_mmap | SYSCALL_G2RFLAG, %g1	! calling sys_mmap
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_mprotect
+	.type _dl_mprotect,@function
+_dl_mprotect:
+	mov SYS_mprotect | SYSCALL_G2RFLAG, %g1	! calling sys_mprotect
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_open
+	.type _dl_open,@function
+_dl_open:
+	mov SYS_open | SYSCALL_G2RFLAG, %g1	! calling sys_open
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_read
+	.type _dl_read,@function
+_dl_read:
+	mov SYS_read | SYSCALL_G2RFLAG, %g1	! calling sys_read
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_write
+	.type _dl_write,@function
+_dl_write:
+	mov SYS_write | SYSCALL_G2RFLAG, %g1	! calling sys_write
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno
+
+
+	.section ".text"
+	.align 4
+	.global _dl_stat
+	.type _dl_stat,@function
+_dl_stat:
+	mov SYS_stat | SYSCALL_G2RFLAG, %g1	! call sys_stat
+	add %o7, 8, %g2				! just return on sucess
+	t ST_SYSCALL				! off to wonderland
+	retl
+	 sub %g0, %o0, %o0			! error: result = -errno