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56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
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/* Prepare arguments for library initialization function.
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Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* The job of this fragment it to find argc and friends for INIT.
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This is done in one of two ways: either in the stack context
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of program start, or having dlopen pass them in.
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*/
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#define SYSDEP_CALL_INIT(NAME, INIT) \
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void NAME (void* arg, ...) \
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{ \
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int argc; \
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char** argv; \
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char** envp; \
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/* The next variable is only here to work around a bug in gcc <= 2.7.2.2. \
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If the address would be taken inside the expression the optimizer \
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would try to be too smart and throws it away. Grrr. */ \
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int *dummy_addr = &_dl_starting_up; \
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\
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__libc_multiple_libcs = dummy_addr && !_dl_starting_up; \
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\
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if (!__libc_multiple_libcs) \
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{ \
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/* The ... in the arg list above forces the gnu ARM compiler to \
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push r0, r1, r2, r3 onto the stack. This way we can get the address */ \
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argc = *(int*) (&arg+4); \
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argv = (char **) &arg + 5; \
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envp = &argv[argc+1]; \
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} \
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else /* the three were passed as arguments */ \
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{ \
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argc = (int)arg; \
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argv = (char**)*(&arg + 1); \
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envp = (char**)*(&arg + 2); \
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} \
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\
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INIT (argc, argv, envp); \
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}
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