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MIPS crti.S, crtn.S


I've applied this patch to add MIPS crti.S and crtn.S.  These are closely 
based on compiler output and it may be useful to simplify them in future 
using the sys/asm.h macros.

CPPFLAGS-* are used to specify PIC compilation for the .S files (which 
matters on MIPS) since CFLAGS (specifically $(CFLAGS-$(<F))) isn't used 
for .S files and ASFLAGS doesn't have a per-target variable like this.

diff --git a/ChangeLog.mips b/ChangeLog.mips
index f92ae72..c3d305e 100644
--- a/ChangeLog.mips
+++ b/ChangeLog.mips
@@ -1,3 +1,17 @@
+2012-02-10  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/mips/mips32/crti.S: New file, based on compiler output
+	for sysdeps/generic/initfini.c.
+	* sysdeps/mips/mips32/crtn.S: Likewise.
+	* sysdeps/mips/mips64/n32/crti.S: Likewise.
+	* sysdeps/mips/mips64/n32/crtn.S: Likewise.
+	* sysdeps/mips/mips64/n64/crti.S: Likewise.
+	* sysdeps/mips/mips64/n64/crtn.S: Likewise.
+	* sysdeps/mips/Makefile (CFLAGS-initfini.s): Remove variable.
+	(CFLAGS-pt-initfini.s): Likewise.
+	(CPPFLAGS-crti.S, CPPFLAGS-crtn.S, CPPFLAGS-pt-crti.S): Define
+	variables.
+
 2012-01-26  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/mips/sys/asm.h: Remove __STDC__ conditionals.
diff --git a/sysdeps/mips/Makefile b/sysdeps/mips/Makefile
index 7937d25..a152699 100644
--- a/sysdeps/mips/Makefile
+++ b/sysdeps/mips/Makefile
@@ -16,11 +16,13 @@ CFLAGS-backtrace.c += -funwind-tables
 endif
 
 ifeq ($(subdir),csu)
-CFLAGS-initfini.s += -fno-unwind-tables
+CPPFLAGS-crti.S += $(pic-ccflag)
+CPPFLAGS-crtn.S += $(pic-ccflag)
 endif
 
 ifeq ($(subdir),nptl)
-CFLAGS-pt-initfini.s += -fno-unwind-tables
+CPPFLAGS-pt-crti.S += $(pic-ccflag)
+CPPFLAGS-crtn.S += $(pic-ccflag)
 endif
 
 ASFLAGS-.os += $(pic-ccflag)
diff --git a/sysdeps/mips/mips32/crti.S b/sysdeps/mips/mips32/crti.S
new file mode 100644
index 0000000..1c7e95d
--- /dev/null
+++ b/sysdeps/mips/mips32/crti.S
@@ -0,0 +1,92 @@
+/* Special .init and .fini section support for MIPS (o32).
+   Copyright (C) 1995-2012 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* crti.S puts a function prologue at the beginning of the .init and
+   .fini sections and defines global symbols for those addresses, so
+   they can be called as functions.  The symbols _init and _fini are
+   magic and cause the linker to emit DT_INIT and DT_FINI.  */
+
+#include <libc-symbols.h>
+
+#ifndef PREINIT_FUNCTION
+# define PREINIT_FUNCTION __gmon_start__
+#endif
+
+#ifndef PREINIT_FUNCTION_WEAK
+# define PREINIT_FUNCTION_WEAK 1
+#endif
+
+#if PREINIT_FUNCTION_WEAK
+	weak_extern (PREINIT_FUNCTION)
+#else
+	.hidden PREINIT_FUNCTION
+#endif
+
+	.section .init,"ax",@progbits
+	.p2align 2
+	.globl _init
+	.type _init, @function
+_init:
+	.set noreorder
+	.cpload $25
+	.set reorder
+	addiu $sp,$sp,-32
+	.cprestore 16
+	sw $31,28($sp)
+#if PREINIT_FUNCTION_WEAK
+	lw $2,%got(PREINIT_FUNCTION)($28)
+	beq $2,$0,.Lno_weak_fn
+	lw $25,%call16(PREINIT_FUNCTION)($28)
+	.reloc 1f,R_MIPS_JALR,PREINIT_FUNCTION
+1:	jalr $25
+.Lno_weak_fn:
+#else
+	lw $25,%got(PREINIT_FUNCTION)($28)
+	.reloc 1f,R_MIPS_JALR,PREINIT_FUNCTION
+1:	jalr $25
+#endif
+
+	.section .fini,"ax",@progbits
+	.p2align 2
+	.globl _fini
+	.type _fini, @function
+_fini:
+	.set noreorder
+	.cpload $25
+	.set reorder
+	addiu $sp,$sp,-32
+	.cprestore 16
+	sw $31,28($sp)
diff --git a/sysdeps/mips/mips32/crtn.S b/sysdeps/mips/mips32/crtn.S
new file mode 100644
index 0000000..9fb564d
--- /dev/null
+++ b/sysdeps/mips/mips32/crtn.S
@@ -0,0 +1,56 @@
+/* Special .init and .fini section support for MIPS (o32).
+   Copyright (C) 1995-2012 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* crtn.S puts function epilogues in the .init and .fini sections
+   corresponding to the prologues in crti.S. */
+
+	.section .init,"ax",@progbits
+	lw $31,28($sp)
+	.set noreorder
+	.set nomacro
+	j $31
+	addiu $sp,$sp,32
+	.set macro
+	.set reorder
+
+	.section .fini,"ax",@progbits
+	lw $31,28($sp)
+	.set noreorder
+	.set nomacro
+	j $31
+	addiu $sp,$sp,32
+	.set macro
+	.set reorder
diff --git a/sysdeps/mips/mips64/n32/crti.S b/sysdeps/mips/mips64/n32/crti.S
new file mode 100644
index 0000000..92b00c2
--- /dev/null
+++ b/sysdeps/mips/mips64/n32/crti.S
@@ -0,0 +1,92 @@
+/* Special .init and .fini section support for MIPS (n32).
+   Copyright (C) 1995-2012 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* crti.S puts a function prologue at the beginning of the .init and
+   .fini sections and defines global symbols for those addresses, so
+   they can be called as functions.  The symbols _init and _fini are
+   magic and cause the linker to emit DT_INIT and DT_FINI.  */
+
+#include <libc-symbols.h>
+
+#ifndef PREINIT_FUNCTION
+# define PREINIT_FUNCTION __gmon_start__
+#endif
+
+#ifndef PREINIT_FUNCTION_WEAK
+# define PREINIT_FUNCTION_WEAK 1
+#endif
+
+#if PREINIT_FUNCTION_WEAK
+	weak_extern (PREINIT_FUNCTION)
+#else
+	.hidden PREINIT_FUNCTION
+#endif
+
+	.section .init,"ax",@progbits
+	.p2align 2
+	.globl _init
+	.type _init, @function
+_init:
+	addiu $sp,$sp,-16
+	sd $28,0($sp)
+	lui $28,%hi(%neg(%gp_rel(_init)))
+	addu $28,$28,$25
+	sd $31,8($sp)
+	addiu $28,$28,%lo(%neg(%gp_rel(_init)))
+#if PREINIT_FUNCTION_WEAK
+	lw $2,%got_disp(PREINIT_FUNCTION)($28)
+	beq $2,$0,.Lno_weak_fn
+	lw $25,%call16(PREINIT_FUNCTION)($28)
+	.reloc 1f,R_MIPS_JALR,PREINIT_FUNCTION
+1:	jalr $25
+.Lno_weak_fn:
+#else
+	lw $25,%got_disp(PREINIT_FUNCTION)($28)
+	.reloc 1f,R_MIPS_JALR,PREINIT_FUNCTION
+1:	jalr $25
+#endif
+
+	.section .fini,"ax",@progbits
+	.p2align 2
+	.globl _fini
+	.type _fini, @function
+_fini:
+	addiu $sp,$sp,-16
+	sd $28,0($sp)
+	lui $28,%hi(%neg(%gp_rel(_fini)))
+	addu $28,$28,$25
+	sd $31,8($sp)
+	addiu $28,$28,%lo(%neg(%gp_rel(_fini)))
diff --git a/sysdeps/mips/mips64/n32/crtn.S b/sysdeps/mips/mips64/n32/crtn.S
new file mode 100644
index 0000000..376582a
--- /dev/null
+++ b/sysdeps/mips/mips64/n32/crtn.S
@@ -0,0 +1,58 @@
+/* Special .init and .fini section support for MIPS (n32).
+   Copyright (C) 1995-2012 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* crtn.S puts function epilogues in the .init and .fini sections
+   corresponding to the prologues in crti.S. */
+
+	.section .init,"ax",@progbits
+	ld $31,8($sp)
+	ld $28,0($sp)
+	.set noreorder
+	.set nomacro
+	j $31
+	addiu $sp,$sp,16
+	.set macro
+	.set reorder
+
+	.section .fini,"ax",@progbits
+	ld $31,8($sp)
+	ld $28,0($sp)
+	.set noreorder
+	.set nomacro
+	j $31
+	addiu $sp,$sp,16
+	.set macro
+	.set reorder
diff --git a/sysdeps/mips/mips64/n64/crti.S b/sysdeps/mips/mips64/n64/crti.S
new file mode 100644
index 0000000..42b26dc
--- /dev/null
+++ b/sysdeps/mips/mips64/n64/crti.S
@@ -0,0 +1,92 @@
+/* Special .init and .fini section support for MIPS (n64).
+   Copyright (C) 1995-2012 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* crti.S puts a function prologue at the beginning of the .init and
+   .fini sections and defines global symbols for those addresses, so
+   they can be called as functions.  The symbols _init and _fini are
+   magic and cause the linker to emit DT_INIT and DT_FINI.  */
+
+#include <libc-symbols.h>
+
+#ifndef PREINIT_FUNCTION
+# define PREINIT_FUNCTION __gmon_start__
+#endif
+
+#ifndef PREINIT_FUNCTION_WEAK
+# define PREINIT_FUNCTION_WEAK 1
+#endif
+
+#if PREINIT_FUNCTION_WEAK
+	weak_extern (PREINIT_FUNCTION)
+#else
+	.hidden PREINIT_FUNCTION
+#endif
+
+	.section .init,"ax",@progbits
+	.p2align 2
+	.globl _init
+	.type _init, @function
+_init:
+	daddiu $sp,$sp,-16
+	sd $28,0($sp)
+	lui $28,%hi(%neg(%gp_rel(_init)))
+	daddu $28,$28,$25
+	sd $31,8($sp)
+	daddiu $28,$28,%lo(%neg(%gp_rel(_init)))
+#if PREINIT_FUNCTION_WEAK
+	ld $2,%got_disp(PREINIT_FUNCTION)($28)
+	beq $2,$0,.Lno_weak_fn
+	ld $25,%call16(PREINIT_FUNCTION)($28)
+	.reloc 1f,R_MIPS_JALR,PREINIT_FUNCTION
+1:	jalr $25
+.Lno_weak_fn:
+#else
+	ld $25,%got_disp(PREINIT_FUNCTION)($28)
+	.reloc 1f,R_MIPS_JALR,PREINIT_FUNCTION
+1:	jalr $25
+#endif
+
+	.section .fini,"ax",@progbits
+	.p2align 2
+	.globl _fini
+	.type _fini, @function
+_fini:
+	daddiu $sp,$sp,-16
+	sd $28,0($sp)
+	lui $28,%hi(%neg(%gp_rel(_fini)))
+	daddu $28,$28,$25
+	sd $31,8($sp)
+	daddiu $28,$28,%lo(%neg(%gp_rel(_fini)))
diff --git a/sysdeps/mips/mips64/n64/crtn.S b/sysdeps/mips/mips64/n64/crtn.S
new file mode 100644
index 0000000..3f901c8
--- /dev/null
+++ b/sysdeps/mips/mips64/n64/crtn.S
@@ -0,0 +1,58 @@
+/* Special .init and .fini section support for MIPS (n64).
+   Copyright (C) 1995-2012 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* crtn.S puts function epilogues in the .init and .fini sections
+   corresponding to the prologues in crti.S. */
+
+	.section .init,"ax",@progbits
+	ld $31,8($sp)
+	ld $28,0($sp)
+	.set noreorder
+	.set nomacro
+	j $31
+	daddiu $sp,$sp,16
+	.set macro
+	.set reorder
+
+	.section .fini,"ax",@progbits
+	ld $31,8($sp)
+	ld $28,0($sp)
+	.set noreorder
+	.set nomacro
+	j $31
+	daddiu $sp,$sp,16
+	.set macro
+	.set reorder

-- 
Joseph S. Myers
joseph@codesourcery.com


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