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/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/auxv.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, const char **argv, const char **envp);
static uint64_t auxv[AT_MAX_COUNT];
FILE *stdout;
unsigned long
auxv_entry(unsigned long type)
{
if (type >= AT_MAX_COUNT)
return 0;
return auxv[type];
}
int
__libc_entry(uint64_t *ctx)
{
uint64_t envc = 0;
uint64_t argc = *ctx;
const char **argv = (const char **)(ctx + 1);
const char **envp = (const char **)(argv + argc + 1);
const struct auxv_entry *auxvp = NULL;
/* Count envp entries */
for (const char **env = envp; *env != NULL; ++env) {
++envc;
}
stdout = fdopen(STDOUT_FILENO, "a");
auxvp = (struct auxv_entry *)(envp + envc + 1);
/* Populate 'auxv' */
while (auxvp->tag != AT_NULL) {
if (auxvp->tag < AT_MAX_COUNT) {
auxv[auxvp->tag] = auxvp->val;
}
++auxvp;
}
return main(argc, argv, envp);
}
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