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-rw-r--r--sysdeps/powerpc/elf/start.c111
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diff --git a/sysdeps/powerpc/elf/start.c b/sysdeps/powerpc/elf/start.c
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+/* Startup code compliant to the ELF PowerPC ABI.
+ Copyright (C) 1997 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. */
+
+/* This is SVR4/PPC ABI compliant, and works under Linux when
+ statically linked. */
+
+#include <unistd.h>
+#include <stdlib.h>
+
+/* Just a little assembler stub before gcc gets its hands on our
+ stack pointer... */
+asm ("\
+ .text
+ .globl _start
+_start:
+ # save the stack pointer, in case we're statically linked under Linux
+ mr 8,1
+ # set up an initial stack frame, and clear the LR
+ addi 1,1,-16
+ clrrwi 1,1,4
+ li 0,0
+ stw 0,0(1)
+ mtlr 0
+ # set r13 to point at the 'small data area'
+ lis 13,_SDA_BASE_@ha
+ addi 13,13,_SDA_BASE_@l
+ # and continue below.
+ b __start1
+");
+
+/* Define a symbol for the first piece of initialized data. */
+int __data_start = 0;
+weak_alias (__data_start, data_start)
+
+/* these probably should go, at least go somewhere else
+ (sysdeps/mach/something?). */
+void (*_mach_init_routine) (void);
+void (*_thread_init_routine) (void);
+
+void __libc_init_first (int argc, char **argv, char **envp);
+int main (int argc, char **argv, char **envp, void *auxvec);
+#ifdef HAVE_INITFINI
+void _init (void);
+void _fini (void);
+#endif
+
+
+static void __start1(int argc, char **argv, char **envp,
+ void *auxvec, void (*exitfn) (void), char **arguments)
+ __attribute__ ((unused));
+static void
+__start1(int argc, char **argv, char **envp,
+ void *auxvec, void (*exitfn) (void),
+ char **arguments)
+{
+ /* the PPC SVR4 ABI says that the top thing on the stack will
+ be a NULL pointer, so if not we assume that we're being called
+ as a statically-linked program by Linux. */
+ int abi_compliant_startup = *arguments == NULL;
+
+ if (!abi_compliant_startup)
+ {
+ argc = *(int *) arguments;
+ argv = arguments+1;
+ envp = argv+argc+1;
+ auxvec = envp;
+ while (auxvec != NULL)
+ auxvec++;
+ auxvec++;
+ exitfn = NULL;
+ }
+
+ if (exitfn != NULL)
+ atexit (exitfn);
+
+ /* libc init routine, in case we are statically linked
+ (otherwise ld.so will have called it when it loaded libc, but
+ calling it twice doesn't hurt). */
+ __libc_init_first (argc, argv, envp);
+
+#ifdef HAVE_INITFINI
+ /* ELF constructors/destructors */
+ atexit (_fini);
+ _init ();
+#endif
+
+ /* Stuff so we can build Mach/Linux executables (like vmlinux). */
+ if (_mach_init_routine != 0)
+ _mach_init_routine ();
+ if (_thread_init_routine != 0)
+ _thread_init_routine ();
+
+ /* the rest of the program */
+ exit (main (argc, argv, envp, auxvec));
+}