af19cc59ca
New version is not compatible on supervisor mode with v1.9.1
(previous version).
Highlights:
o BBL (Berkeley Boot Loader) provides no initial page tables
anymore allowing us to choose VM, to build page tables manually
and enable MMU in S-mode.
o SBI interface changed.
o GENERIC kernel.
FDT is now chosen standard for RISC-V hardware description.
DTB is now provided by Spike (golden model simulator). This
allows us to introduce GENERIC kernel. However, description
for console and timer devices is not provided in DTB, so move
these devices temporary to nexus bus.
o Supervisor can't access userspace by default. Solution is to
set SUM (permit Supervisor User Memory access) bit in sstatus
register.
o Compressed extension is now turned on by default.
o External GCC 7.1 compiler used.
o _gp renamed to __global_pointer$
o Compiler -march= string is now in use allowing us to choose
required extensions (compressed, FPU, atomic, etc).
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D11800
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/* LINTLIBRARY */
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/*-
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* Copyright 1996-1998 John D. Polstra.
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* Copyright (c) 2015-2017 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* Portions of this software were developed by SRI International and the
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* University of Cambridge Computer Laboratory under DARPA/AFRL contract
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* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Portions of this software were developed by the University of Cambridge
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* Computer Laboratory as part of the CTSRD Project, with support from the
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* UK Higher Education Innovation Fund (HEIF).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stdlib.h>
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#include "libc_private.h"
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#include "crtbrand.c"
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#include "ignore_init.c"
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typedef void (*fptr)(void);
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#ifdef GCRT
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extern void _mcleanup(void);
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extern void monstartup(void *, void *);
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extern int eprol;
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extern int etext;
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#endif
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void __start(int argc, char **argv, char **env, void (*cleanup)(void));
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/* The entry function. */
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__asm(" .text \n"
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" .align 0 \n"
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" .globl _start \n"
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" _start: \n"
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" mv a3, a2 \n" /* cleanup */
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" addi a1, a0, 8 \n" /* get argv */
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" ld a0, 0(a0) \n" /* load argc */
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" slli t0, a0, 3 \n" /* mult by arg size */
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" add a2, a1, t0 \n" /* env is after argv */
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" addi a2, a2, 8 \n" /* argv is null terminated */
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" .option push \n"
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" .option norelax \n"
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" lla gp, __global_pointer$\n"
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" .option pop \n"
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" call __start");
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void
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__start(int argc, char **argv, char **env, void (*cleanup)(void))
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{
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handle_argv(argc, argv, env);
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if (&_DYNAMIC != NULL)
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atexit(cleanup);
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else
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_init_tls();
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#ifdef GCRT
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atexit(_mcleanup);
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monstartup(&eprol, &etext);
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__asm__("eprol:");
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#endif
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handle_static_init(argc, argv, env);
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exit(main(argc, argv, env));
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}
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