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- /* Startup code compliant to the ELF LoongArch ABI.
- Copyright (C) 2022-2026 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.
- 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
- <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 */
- la.pcrel 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.pcrel ra, t0, __libc_start_main
- jirl ra, ra, 0
- la.pcrel ra, t0, abort
- jirl ra, ra, 0
- END (ENTRY_POINT)
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