d2c0ec8d19
An e got dropped and then cut and pasted into far too many places. Sponsored by: Netflix Noticed by: freqlabs on irc
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
|
|
* Copyright (c) 2022, Netflix, Inc.
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
/*
|
|
* MI part of the C startup code. We take a long * pointer (we assume long is
|
|
* the same size as a pointer, as the Linux world is wont to do). We get a
|
|
* pointer to the stack with the main args on it. We don't bother decoding the
|
|
* aux vector, but may need to do so in the future.
|
|
*
|
|
* The long *p points to:
|
|
*
|
|
* +--------------------+
|
|
* | argc | Small address
|
|
* +--------------------+
|
|
* | argv[0] | argv
|
|
* +--------------------+
|
|
* | argv[1] |
|
|
* +--------------------+
|
|
* ...
|
|
* +--------------------+
|
|
* | NULL | &argv[argc]
|
|
* +--------------------+
|
|
* | envp[0] | envp
|
|
* +--------------------+
|
|
* | envp[1] |
|
|
* +--------------------+
|
|
* ...
|
|
* +--------------------+
|
|
* | NULL |
|
|
* +--------------------+
|
|
* | aux type | AT_xxxx
|
|
* +--------------------+
|
|
* | aux value |
|
|
* +--------------------+
|
|
* | aux type | AT_xxxx
|
|
* +--------------------+
|
|
* | aux value |
|
|
* +--------------------+
|
|
* | aux type | AT_xxxx
|
|
* +--------------------+
|
|
* | aux value |
|
|
* +--------------------+
|
|
*...
|
|
* +--------------------+
|
|
* | NULL |
|
|
* +--------------------+
|
|
*
|
|
* The AUX vector contains additional information for the process to know from
|
|
* the kernel (not parsed currently). AT_xxxx constants are small (< 50).
|
|
*/
|
|
|
|
extern void _start_c(long *);
|
|
extern int main(int, const char **, char **);
|
|
|
|
#include "start_arch.h"
|
|
|
|
void
|
|
_start_c(long *p)
|
|
{
|
|
int argc;
|
|
const char **argv;
|
|
char **envp;
|
|
|
|
argc = p[0];
|
|
argv = (const char **)(p + 1);
|
|
envp = (char **)argv + argc + 1;
|
|
|
|
/* Note: we don't ensure that fd 0, 1, and 2 are sane at this level */
|
|
/* Also note: we expect main to exit, not return off the end */
|
|
main(argc, argv, envp);
|
|
}
|