#include <_ansi.h>
#include <reent.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <setjmp.h>
#include <sys/kos_io.h>
struct app_hdr
{
char banner[8];
int version;
int start;
int iend;
int memsize;
int stacktop;
char *cmdline;
char *path;
int reserved;
void *__idata_start;
void *__idata_end;
int (*main)(int argc, char **argv, char **envp);
};
void _pei386_runtime_relocator (void);
void init_loader(void *libc_image);
void init_reent();
int link_app();
void* get_entry_point(void *raw);
int (*entry)(int, char **, char **);
char* __appenv;
int __appenv_size;
extern char _tls_map[128];
void __attribute__((noreturn))
__thread_startup (int (*entry)(void*), void *param,
void *stacklow, void *stackhigh)
{
int retval;
// asm volatile ( "xchgw %bx, %bx");
__asm__ __volatile__( // save stack limits
"movl %0, %%fs:8 \n\t" // use TLS
"movl %1, %%fs:12 \n\t"
::"r"(stacklow), "r"(stackhigh));
init_reent(); // initialize thread reentry structure
retval = entry(param); // call user thread function
_exit(retval);
};
char * __libc_getenv(const char *name)
{
return NULL;
}
static int split_cmdline(char *cmdline, char **argv)
{
enum quote_state
{
QUOTE_NONE, /* no " active in current parm */
QUOTE_DELIMITER, /* " was first char and must be last */
QUOTE_STARTED /* " was seen, look for a match */
};
enum quote_state state;
unsigned int argc;
char *p = cmdline;
char *new_arg, *start;
argc = 0;
for(;;)
{
/* skip over spaces and tabs */
if ( *p )
{
while (*p == ' ' || *p == '\t')
++p;
}
if (*p == '\0')
break;
state = QUOTE_NONE;
if( *p == '\"' )
{
p++;
state = QUOTE_DELIMITER;
}
new_arg = start = p;
for (;;)
{
if( *p == '\"' )
{
p++;
if( state == QUOTE_NONE )
{
state = QUOTE_STARTED;
}
else
{
state = QUOTE_NONE;
}
continue;
}
if( *p == ' ' || *p == '\t' )
{
if( state == QUOTE_NONE )
{
break;
}
}
if( *p == '\0' )
break;
if( *p == '\\' )
{
if( p[1] == '\"' )
{
++p;
if( p[-2] == '\\' )
{
continue;
}
}
}
if( argv )
{
*(new_arg++) = *p;
}
++p;
};
if( argv )
{
argv[ argc ] = start;
++argc;
/*
The *new = '\0' is req'd in case there was a \" to "
translation. It must be after the *p check against
'\0' because new and p could point to the same char
in which case the scan would be terminated too soon.
*/
if( *p == '\0' )
{
*new_arg = '\0';
break;
}
*new_arg = '\0';
++p;
}
else
{
++argc;
if( *p == '\0' )
{
break;
}
++p;
}
}
return argc;
};
void __attribute__((noreturn))
libc_crt_startup (void *libc_base)
{
struct app_hdr *header = NULL;
int retval = 0;
char **argv;
int argc;
_pei386_runtime_relocator();
_tls_map[0] = 0xE0;
init_reent();
init_stdio();
// __appenv = load_file("/sys/system.env", &__appenv_size);
init_loader(libc_base);
if( link_app() == 0)
goto done;
if( header->cmdline[0] != 0)
{
argc = split_cmdline(header->cmdline, NULL) + 1;
argv = alloca((argc+1)*sizeof(char*));
argv[0] = header->path;
split_cmdline(header->cmdline, argv + 1);
}
else
{
argc = 1;
argv = alloca((argc+1)*sizeof(char*));
argv[0] = header->path;
}
argv[argc] = NULL;
retval = header->main(argc, argv, NULL);
done:
}