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Diffstat (limited to 'sysdeps/alpha/start.S')
| -rw-r--r-- | sysdeps/alpha/start.S | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/sysdeps/alpha/start.S b/sysdeps/alpha/start.S new file mode 100644 index 0000000000..cf195c1c44 --- /dev/null +++ b/sysdeps/alpha/start.S @@ -0,0 +1,85 @@ +/* Startup code for Alpha/ELF. + Copyright (C) 1993-2014 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. + + In addition to the permissions in the GNU Lesser 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 GNU Lesser 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.) + + Note that people who make modified versions of this file are not + obligated to grant this special exception for their modified + versions; it is their choice whether to do so. The GNU Lesser + General Public License gives permission to release a modified + version without this exception; this exception also makes it + possible to release a modified version which carries forward this + exception. + + 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, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + + .text + .align 3 + .globl _start + .ent _start, 0 + .type _start,@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, __libc_csu_init + lda a4, __libc_csu_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, __libc_start_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 + +/* For ECOFF backwards compatibility. */ +weak_alias (_start, __start) + +/* Define a symbol for the first piece of initialized data. */ + .data + .globl __data_start +__data_start: + .weak data_start + data_start = __data_start |