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Initialization stuff for Linux/ARM.

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This commit is contained in:
Ulrich Drepper 1998-08-20 17:37:44 +00:00
parent e77c56e8f5
commit cb759cab5a
1 changed files with 55 additions and 0 deletions
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55
sysdeps/unix/sysv/linux/arm/init-first.h Normal file
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/* Prepare arguments for library initialization function.
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. */
/* The job of this fragment it to find argc and friends for INIT.
This is done in one of two ways: either in the stack context
of program start, or having dlopen pass them in.
*/
#define SYSDEP_CALL_INIT(NAME, INIT) \
void NAME (void* arg, ...) \
{ \
int argc; \
char** argv; \
char** envp; \
/* The next variable is only here to work around a bug in gcc <= 2.7.2.2. \
If the address would be taken inside the expression the optimizer \
would try to be too smart and throws it away. Grrr. */ \
int *dummy_addr = &_dl_starting_up; \
\
__libc_multiple_libcs = dummy_addr && !_dl_starting_up; \
\
if (!__libc_multiple_libcs) \
{ \
/* The ... in the arg list above forces the gnu ARM compiler to \
push r0, r1, r2, r3 onto the stack. This way we can get the address */ \
argc = *(int*) (&arg+4); \
argv = (char **) &arg + 5; \
envp = &argv[argc+1]; \
} \
else /* the three were passed as arguments */ \
{ \
argc = (int)arg; \
argv = (char**)*(&arg + 1); \
envp = (char**)*(&arg + 2); \
} \
\
INIT (argc, argv, envp); \
}