diff options
Diffstat (limited to 'libc/sysdeps/linux/alpha/crt1.S')
| -rw-r--r-- | libc/sysdeps/linux/alpha/crt1.S | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/alpha/crt1.S b/libc/sysdeps/linux/alpha/crt1.S new file mode 100644 index 000000000..0831ecf6f --- /dev/null +++ b/libc/sysdeps/linux/alpha/crt1.S @@ -0,0 +1,80 @@ +/* Startup code for Alpha/ELF. + Copyright (C) 1993,1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu> + + 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. + + 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. */ + +#include <features.h> +#include <asm/regdef.h> + +.text +.global _start +.ent _start,0 +.type _start,%function +#if defined(__UCLIBC_CTOR_DTOR__) +.type _init,%function +.type _fini,%function +#else +.weak _init +.weak _fini +#endif +.type __uClibc_main,%function +/* Stick in a dummy reference to main(), so that if an application + * is linking when the main() function is in a static library (.a) + * we can be sure that main() actually gets linked in */ +.type main,%function + +_start: + .frame $15, 0, $15 + br gp, 1f +1: ldgp gp, 0(gp) + subq sp, 16, sp + mov 0, $15 + .prologue 0 + + /* Load address of the user's main function. */ + lda a0, main + + ldl a1, 16(sp) /* get argc */ + lda a2, 24(sp) /* get argv */ + + /* Load address of our own entry points to .fini and .init. */ + lda a3, _init + lda a4, _fini + + /* Store address of the shared library termination function. */ + mov v0, a5 + + /* Provide the highest stack address to the user code. */ + stq sp, 0(sp) + + /* Call the user's main function, and exit with its value. + * But let the libc call main. */ + jsr ra, __uClibc_main + + /* Die very horribly if exit returns. Call_pal hlt is callable from + * kernel mode only; this will result in an illegal instruction trap. */ + call_pal 0 + .end _start + +/* Define a symbol for the first piece of initialized data. */ +.data +.global __data_start +__data_start: +.long 0 +.weak data_start + data_start = __data_start |