+/*
+ * special support for eabi
+ *
+ * Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+ * Written By Michael Meissner
+ *
+ * This file 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, or (at your option) any
+ * later version.
+ *
+ * In addition to the permissions in the GNU 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 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.)
+ *
+ * This file 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; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * As a special exception, if you link this library with files
+ * compiled with GCC to produce an executable, this does not cause
+ * the resulting executable to be covered by the GNU General Public License.
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ */
+
/* Do any initializations needed for the eabi environment */
.file "eabi.asm"
#include "ppc-asm.h"
.section ".got2","aw"
+ .align 2
.LCTOC1 = . /* +32768 */
/* Table of addresses */
.Ltable = .-.LCTOC1
.long .LCTOC1 /* address we are really at */
-.Lgot = .-.LCTOC1
- .long _GLOBAL_OFFSET_TABLE_ /* normal GOT address */
+.Lsda = .-.LCTOC1
+ .long _SDA_BASE_ /* address of the first small data area */
+
+.Lsdas = .-.LCTOC1
+ .long __SDATA_START__ /* start of .sdata/.sbss section */
+
+.Lsdae = .-.LCTOC1
+ .long __SBSS_END__ /* end of .sdata/.sbss section */
+
+.Lsda2 = .-.LCTOC1
+ .long _SDA2_BASE_ /* address of the second small data area */
-.Lgots = .-.LCTOC1
- .long _GOT_START_ /* start of .got section */
+.Lsda2s = .-.LCTOC1
+ .long __SDATA2_START__ /* start of .sdata2/.sbss2 section */
-.Lgote = .-.LCTOC1
- .long _GOT_END_ /* end of .got section */
+.Lsda2e = .-.LCTOC1
+ .long __SBSS2_END__ /* end of .sdata2/.sbss2 section */
.Lgot2s = .-.LCTOC1
- .long _GOT2_START_ /* -mrelocatable GOT pointers start */
+ .long __GOT2_START__ /* -mrelocatable GOT pointers start */
.Lgot2e = .-.LCTOC1
- .long _GOT2_END_ /* -mrelocatable GOT pointers end */
+ .long __GOT2_END__ /* -mrelocatable GOT pointers end */
.Lfixups = .-.LCTOC1
- .long _FIXUP_START_ /* start of .fixup section */
+ .long __FIXUP_START__ /* start of .fixup section */
.Lfixupe = .-.LCTOC1
- .long _FIXUP_END_ /* end of .fixup section */
+ .long __FIXUP_END__ /* end of .fixup section */
+
+.Lctors = .-.LCTOC1
+ .long __CTOR_LIST__ /* start of .ctor section */
+
+.Lctore = .-.LCTOC1
+ .long __CTOR_END__ /* end of .ctor section */
+
+.Ldtors = .-.LCTOC1
+ .long __DTOR_LIST__ /* start of .dtor section */
+
+.Ldtore = .-.LCTOC1
+ .long __DTOR_END__ /* end of .dtor section */
+
+.Lexcepts = .-.LCTOC1
+ .long __EXCEPT_START__ /* start of .gcc_except_table section */
+
+.Lexcepte = .-.LCTOC1
+ .long __EXCEPT_END__ /* end of .gcc_except_table section */
+
+.Linit = .-.LCTOC1
+ .long .Linit_p /* address of variable to say we've been called */
+
+ .data
+ .align 2
+.Linit_p:
+ .long 0
.text
+#ifdef _RELOCATABLE
.Lptr:
.long .LCTOC1-.Laddr /* PC relative pointer to .got2 */
+#endif
FUNC_START(__eabi)
+
+/* Eliminate -mrelocatable code if not -mrelocatable, so that this file can
+ be assembled with other assemblers than GAS, such as the Solaris PowerPC
+ assembler. */
+
+#ifdef _RELOCATABLE
mflr 0
bl .Laddr /* get current address */
.Laddr:
lwz 11,(.Lptr-.Laddr)(12) /* linker generated address of .LCTOC1 */
add 11,11,12 /* correct to real pointer */
lwz 12,.Ltable(11) /* get linker's idea of where .Laddr is */
+ lwz 10,.Linit(11) /* address of init flag */
subf. 12,12,11 /* calculate difference */
+ lwzx 9,10,12 /* done flag */
mtlr 0 /* restore link register */
- bc 4,2,.Lreloc /* skip if we need to relocate */
+ cmplwi 2,9,0 /* init flag != 0? */
+ bnelr 2 /* return now, if we've been called already */
+ stwx 1,10,12 /* store a non-zero value in the done flag */
+ bne- 0,.Lreloc /* skip if we need to relocate */
-/* Only load up register 2 if there is a .got section */
+#else /* !-mrelocatable */
+ addis 10,0,.Linit_p@ha /* init flag */
+ addis 11,0,.LCTOC1@ha /* load address of .LCTOC1 */
+ lwz 9,.Linit_p@l(10) /* init flag */
+ addi 11,11,.LCTOC1@l
+ cmplwi 2,9,0 /* init flag != 0? */
+ bnelr 2 /* return now, if we've been called already */
+ stw 1,.Linit_p@l(10) /* store a non-zero value in the done flag */
- lwz 3,.Lgots(11) /* start of .got section */
- lwz 4,.Lgote(11) /* end of .got section */
- cmpw 1,3,4 /* .got section non-empty? */
- bc 12,6,.Ldone
+#endif /* !-mrelocatable */
+
+/* Only load up register 13 if there is a .sdata and/or .sbss section */
+
+ lwz 3,.Lsdas(11) /* start of .sdata/.sbss section */
+ lwz 4,.Lsdae(11) /* end of .sdata/.sbss section */
+ cmpw 1,3,4 /* .sdata/.sbss section non-empty? */
+ beq- 1,.Lsda2l /* skip loading r13 */
-/* Normal program, load up register 2 */
+ lwz 13,.Lsda(11) /* load r13 with _SDA_BASE address */
- lwz 2,.Lgot(11) /* normal GOT address (obsolete in register 2) */
- mr 13,2 /* also same as _SDA_BASE_ (V.4 small data ptr) */
+/* Only load up register 2 if there is a .sdata2 and/or .sbss2 section */
+
+.Lsda2l:
+ lwz 3,.Lsda2s(11) /* start of .sdata/.sbss section */
+ lwz 4,.Lsda2e(11) /* end of .sdata/.sbss section */
+ cmpw 1,3,4 /* .sdata/.sbss section non-empty? */
+ beq+ 1,.Ldone /* skip loading r2 */
+
+ lwz 2,.Lsda2(11) /* load r2 with _SDA2_BASE address */
b FUNC_NAME(__do_global_ctors) /* do any C++ global constructors (which returns to caller) */
-/* We need to relocate the .got2 pointers. Don't load register 2 */
+#ifdef _RELOCATABLE
.Lreloc:
+/* We need to relocate the .got2 pointers. Don't load registers 2 or 13 */
+
lwz 3,.Lgot2s(11) /* GOT pointers start */
lwz 4,.Lgot2e(11) /* GOT pointers end */
add 3,12,3 /* adjust pointers */
add 4,12,4
cmpw 1,3,4 /* any pointers to adjust */
- bc 12,6,.Lfix
+ bc 12,6,.Lctor
.Lloop:
lwz 5,0(3) /* next pointer */
cmpw 1,3,4 /* more pointers to adjust? */
bc 4,6,.Lloop
+/* Fixup the .ctor section for static constructors */
+
+.Lctor:
+ lwz 3,.Lctors(11) /* constructors pointers start */
+ lwz 4,.Lctore(11) /* constructors pointers end */
+
+ cmpw 1,3,4 /* any pointers to adjust */
+ bc 12,6,.Ldtor
+
+.Lcloop:
+ lwz 5,0(3) /* next pointer */
+ add 5,5,12 /* adjust */
+ stw 5,0(3)
+ addi 3,3,4 /* bump to next word */
+ cmpw 1,3,4 /* more pointers to adjust? */
+ bc 4,6,.Lcloop
+
+/* Fixup the .dtor section for static destructors */
+
+.Ldtor:
+ lwz 3,.Ldtors(11) /* destructors pointers start */
+ lwz 4,.Ldtore(11) /* destructors pointers end */
+
+ cmpw 1,3,4 /* any pointers to adjust */
+ bc 12,6,.Lexcept
+
+.Ldloop:
+ lwz 5,0(3) /* next pointer */
+ add 5,5,12 /* adjust */
+ stw 5,0(3)
+ addi 3,3,4 /* bump to next word */
+ cmpw 1,3,4 /* more pointers to adjust? */
+ bc 4,6,.Ldloop
+
+/* Fixup the .gcc_except_table section for G++ exceptions */
+
+.Lexcept:
+ lwz 3,.Lexcepts(11) /* exception table pointers start */
+ lwz 4,.Lexcepte(11) /* exception table pointers end */
+
+ cmpw 1,3,4 /* any pointers to adjust */
+ bc 12,6,.Lfix
+
+.Leloop:
+ lwz 5,0(3) /* next pointer */
+ addi 3,3,4 /* bump to next word */
+ cmpi 1,5,0
+ beq 1,.Leloop /* if NULL pointer, don't adjust */
+ add 5,5,12 /* adjust */
+ stw 5,-4(3)
+ cmpw 1,3,4 /* more pointers to adjust? */
+ bc 4,6,.Leloop
+
/* Fixup any user initialized pointers now (the compiler drops pointers to */
-/* each of the relocs that it does in the .fixup section). Note, the pointers */
-/* themselves have already been fixed up by the previous loop. */
+/* each of the relocs that it does in the .fixup section). */
.Lfix:
lwz 3,.Lfixups(11) /* fixup pointers start */
.Lfloop:
lwz 5,0(3) /* next pointer */
+ add 5,5,12 /* adjust pointer */
lwz 6,0(5) /* get the pointer it points to */
+ stw 5,0(3) /* store adjusted pointer */
add 6,6,12 /* adjust */
stw 6,0(5)
addi 3,3,4 /* bump to next word */
cmpw 1,3,4 /* more pointers to adjust? */
bc 4,6,.Lfloop
+#endif /* _RELOCATABLE */
/* Done adjusting pointers, return */
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