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/* Startup code compliant to the ELF LoongArch ABI.
Copyright (C) 2022 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 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, see
<https://www.gnu.org/licenses/>. */
#define __ASSEMBLY__ 1
#include <entry.h>
#include <sys/asm.h>
/* The entry point's job is to call __libc_start_main. Per the ABI,
a0 contains the address of a function to be passed to atexit.
__libc_start_main wants this in a5. */
/*
int
__libc_start_main (int (*main) (int, char **, char **),
int argc,
char **argv,
__typeof (main) init,
void (*fini) (void),
void (*rtld_fini) (void),
void *stack_end);
*/
ENTRY (ENTRY_POINT)
/* Terminate call stack by noting ra is undefined. Use a dummy
.cfi_label to force starting the FDE. */
.cfi_label .Ldummy
cfi_undefined (1)
or a5, a0, zero /* rtld_fini */
/* We must get symbol main through GOT table, since main may not be local.
For instance: googletest defines main in dynamic library. */
la.got a0, t0, main
REG_L a1, sp, 0
ADDI a2, sp, SZREG
/* Adjust $sp for 16-aligned */
BSTRINS sp, zero, 3, 0
move a3, zero /* used to be init */
move a4, zero /* used to be fini */
or a6, sp, zero /* stack_end */
la.got ra, t0, __libc_start_main
jirl ra, ra, 0
la.got ra, t0, abort
jirl ra, ra, 0
END (ENTRY_POINT)
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