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[src/trunk]: src/lib/csu/arch/earm crt* files for ARM EABI. This is pretty d...
details: https://anonhg.NetBSD.org/src/rev/b32c03c7abe3
branches: trunk
changeset: 780953:b32c03c7abe3
user: matt <matt%NetBSD.org@localhost>
date: Mon Aug 13 02:49:04 2012 +0000
description:
crt* files for ARM EABI. This is pretty different from OABI. crti.S only
has sysident, crtn.S is empty. True dtor/ctor processing is done elsewhere
(in crt0.o for static or the rtld for dynamic images). All that is done in
here is either a call to __cxa_finalize (dtor, only when SHARED) or
register_frame_info and _JV_RegisterClasses.
diffstat:
lib/csu/arch/earm/Makefile.inc | 5 +
lib/csu/arch/earm/crt0.S | 55 ++++++++++
lib/csu/arch/earm/crtbegin.S | 216 +++++++++++++++++++++++++++++++++++++++++
lib/csu/arch/earm/crtend.S | 54 ++++++++++
lib/csu/arch/earm/crti.S | 41 +++++++
lib/csu/arch/earm/crtn.S | 3 +
6 files changed, 374 insertions(+), 0 deletions(-)
diffs (truncated from 398 to 300 lines):
diff -r ba17db0eedb4 -r b32c03c7abe3 lib/csu/arch/earm/Makefile.inc
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/csu/arch/earm/Makefile.inc Mon Aug 13 02:49:04 2012 +0000
@@ -0,0 +1,5 @@
+# $NetBSD: Makefile.inc,v 1.1 2012/08/13 02:49:04 matt Exp $
+
+CPPFLAGS+= -DELFSIZE=32
+CPPFLAGS+= -DHAVE_INITFINI_ARRAY
+
diff -r ba17db0eedb4 -r b32c03c7abe3 lib/csu/arch/earm/crt0.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/csu/arch/earm/crt0.S Mon Aug 13 02:49:04 2012 +0000
@@ -0,0 +1,55 @@
+/* $NetBSD: crt0.S,v 1.1 2012/08/13 02:49:04 matt Exp $ */
+
+/*-
+ * Copyright (c) 2012 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry.
+ *
+ * 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.
+ *
+ * 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 <arm/asm.h>
+
+RCSID("$NetBSD: crt0.S,v 1.1 2012/08/13 02:49:04 matt Exp $")
+
+STRONG_ALIAS(_start,__start)
+
+_ENTRY(__start)
+ /*
+ * We need to swap ps_strings and cleanup
+ */
+ mov ip, r0 /* ps_strings -> tmp */
+ mov r0, r2 /* cleanup -> ps_strings */
+ mov r2, ip /* tmp -> ps_strings */
+
+ /* Ensure the stack is properly aligned before calling C code. */
+ bic sp, sp, #7
+
+ /*
+ * void ___start(void (*cleanup)(void),
+ * const Obj_Entry *obj,
+ * struct ps_strings *ps_strings);
+ */
+
+ b ___start
diff -r ba17db0eedb4 -r b32c03c7abe3 lib/csu/arch/earm/crtbegin.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/csu/arch/earm/crtbegin.S Mon Aug 13 02:49:04 2012 +0000
@@ -0,0 +1,216 @@
+/* $NetBSD: crtbegin.S,v 1.1 2012/08/13 02:49:04 matt Exp $ */
+/*-
+ * Copyright (c) 2012 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry.
+ *
+ * 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.
+ *
+ * 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 <arm/asm.h>
+
+RCSID("$NetBSD: crtbegin.S,v 1.1 2012/08/13 02:49:04 matt Exp $")
+
+ .section .eh_frame, "a", %progbits
+ .p2align 2
+__EH_FRAME_LIST__:
+
+ .section .jcr, "aw", %progbits
+ .p2align 2
+__JCR_LIST__:
+
+ .section .data.rel, "aw", %progbits
+ .p2align 2
+ .type __dso_handle, %object
+ .size __dso_handle, 4
+ .globl __dso_handle
+ .hidden __dso_handle
+__dso_handle:
+#ifdef SHARED
+ .word __dso_handle
+#else
+ .word 0
+#endif
+
+ .text
+#ifdef SHARED
+ /*
+ * If we aren't shared, all we do is set finished
+ * to 1 if it isn't 1 already. So why bother do that at all?
+ */
+ .type __do_global_dtors_aux, %function
+__do_global_dtors_aux:
+ GOT_INIT(r3, .Ldtors_got, .Ldtors) /* use r3 temporarily */
+ ldr r1, .L__finished /* GOTOFF */
+ ldrb r0, [r1, r3]!
+ cmp r0, #0 /* done this already? */
+ RETc(ne)
+ mov r0, #1
+ strb r0, [r1] /* mark it as done */
+
+ GOT_GET(ip, r3, .L__cxa_finalize)
+ cmp ip, #0
+ RETc(eq)
+ ldr r0, .L__dso_handle /* GOTOFF */
+ ldr r0, [r0, r3] /* load relative to got */
+#if defined(_ARM_ARCH_4T)
+ bx ip /* tail call */
+#else
+ mov pc, ip
+#endif
+
+#if 0 /* not used */
+ /*
+ * if (__deregister_frame_info)
+ * __deregister_frame_info(&__EH_FRAME_LIST__[0]);
+ */
+ GOT_GET(ip, r3, .L__deregister_frame_info)
+ cmp ip, #0
+ ldmeqfd sp, {r4, r5, fp, sp, pc} /* restore and return */
+
+ ldr r1, .L__EH_FRAME_LIST__ /* GOTOFF */
+ add r1, r1, r4 /* add got addr */
+ ldmfd sp, {r4, r5, fp, sp, lr} /* restore everthing */
+#if !defined(_ARM_ARCH_4T)
+ bx ip /* tail call it */
+#else
+ mov pc, ip /* tail call it */
+#endif
+#endif /* notused */
+
+ .weak __cxa_finalize
+ .weak __deregister_frame_info
+
+ .align 2
+ GOT_INITSYM(.Ldtors_got, .Ldtors)
+.L__cxa_finalize:
+ .word PIC_SYM(_C_LABEL(__cxa_finalize), GOT)
+#if 0
+.L__deregister_frame_info:
+ .word PIC_SYM(_C_LABEL(__deregister_frame_info), GOT)
+#endif
+.L__finished:
+ .word PIC_SYM(_C_LABEL(__finished), GOTOFF)
+.L__dso_handle:
+ .word PIC_SYM(_C_LABEL(__dso_handle), GOTOFF)
+
+ .pushsection .fini_array,"aw",%fini_array
+ .p2align 2
+ .word __do_global_dtors_aux
+ .popsection
+#endif /* SHARED */
+
+ .local __finished
+ .comm __finished,1,1
+
+ .weak __register_frame_info
+ .weak _Jv_RegisterClasses
+
+ .type __do_global_ctors_aux, %function
+__do_global_ctors_aux:
+ GOT_INIT(r3, .Lctors_got, .Lctors)
+ ldr r1, .L__initialized /* GOTOFF if PIC */
+#ifdef PIC
+ ldrb r0, [r1, r3]! /* r1 = r1 + got */
+#else
+ ldrb r0, [r1]
+#endif
+ cmp r0, #0 /* done this already? */
+ RETc(ne)
+ mov r0, #1
+ strb r0, [r1] /* mark it as done */
+
+ mov ip, sp
+ stmfd sp!, {r4, r5, fp, ip, lr, pc}
+ sub fp, ip, #4
+ mov r4, r3 /* now that r4 is saved ... */
+
+ /*
+ * if (__register_frame_info)
+ * __register_frame_info(&__EH_FRAME_LIST__[0], &__dwarf_eh_object)
+ */
+ GOT_GET(ip, r4, .L__register_frame_info)
+ cmp ip, #0
+ beq 1f
+
+ ldr r0, .L__EH_FRAME_LIST__
+ ldr r1, .L__dwarf_eh_object
+#ifdef PIC
+ add r0, r0, r4
+ add r1, r1, r4
+#endif
+
+#if defined(_ARM_ARCH_4T)
+ blx ip
+#else
+ mov lr, pc
+ mov pc, ip
+#endif
+1:
+ /*
+ * if (_Jv_RegisterClasses && __JCR_LIST__[0])
+ * _Jv_RegisterClasses(&__JCR_LIST__[0]);
+ */
+ GOT_GET(ip, r4, .L_Jv_RegisterClasses)
+ cmp ip, #0
+ ldmeqfd sp, {r4, r5, fp, sp, pc} /* return if null */
+
+ ldr r0, .L__JCR_LIST__
+#ifdef PIC
+ ldr r2, [r0, r4]! /* GOTOFF + got == address */
+#else
+ ldr r2, [r0]
+#endif
+ cmp r2, #0
+ ldmfd sp, {r4, r5, fp, sp, lr} /* restore everything */
+ RETc(eq) /* return if null */
+#if defined(_ARM_ARCH_4T)
+ bx ip /* return or tail call */
+#else
+ mov pc, ip /* return or tail call */
+#endif
+
+ .p2align 2
+ GOT_INITSYM(.Lctors_got, .Lctors)
+.L__register_frame_info:
+ .word PIC_SYM(_C_LABEL(__register_frame_info), GOT)
+.L_Jv_RegisterClasses:
+ .word PIC_SYM(_C_LABEL(_Jv_RegisterClasses), GOT)
+.L__initialized:
+ .word PIC_SYM(_C_LABEL(__initialized), GOTOFF)
+.L__EH_FRAME_LIST__:
+ .word PIC_SYM(_C_LABEL(__EH_FRAME_LIST__), GOTOFF)
+.L__dwarf_eh_object:
+ .word PIC_SYM(_C_LABEL(__dwarf_eh_object), GOTOFF)
+.L__JCR_LIST__:
+ .word PIC_SYM(_C_LABEL(__JCR_LIST__), GOTOFF)
+
+ .local __initialized
+ .comm __initialized,1,1
+ .local __dwarf_eh_object
+ .comm __dwarf_eh_object,24,4
+
+ .section .init_array,"aw",%init_array
+ .p2align 2
+ .word __do_global_ctors_aux
diff -r ba17db0eedb4 -r b32c03c7abe3 lib/csu/arch/earm/crtend.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/csu/arch/earm/crtend.S Mon Aug 13 02:49:04 2012 +0000
@@ -0,0 +1,54 @@
+/* $NetBSD: crtend.S,v 1.1 2012/08/13 02:49:04 matt Exp $ */
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry.
+ *
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