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kolibrios/programs/develop/libraries/newlib/crt/crtdll.c

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2.8 KiB
C
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#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 _argc;
char **_argv;
void __fastcall init_loader(void *libc_image);
void* __fastcall create_image(void *raw);
int __fastcall link_image(void *img_base);
void* get_entry_point(void *raw);
int (*entry)(int, char **, char **);
void init_reent();
jmp_buf loader_env;
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:4 \n\t" // use TLS
"movl %1, %%fs:8 \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;
}
char __appcwd[1024];
int __appcwdlen;
char* __appenv;
int __appenv_size;
void __attribute__((noreturn))
crt_startup (void *libc_base, void *obj_base, uint32_t *params)
{
struct app_hdr *header;
char *arg[2];
int len;
char *p;
void *my_app;
int retval = 0;
// user_free(obj_base);
init_reent();
__initPOSIXHandles();
__appenv = load_file("/sys/system.env", &__appenv_size);
init_loader(libc_base);
my_app = create_image((void*)(params[0]));
if( link_image(my_app)==0)
goto done;
header = (struct app_hdr*)NULL;
__appcwdlen = strrchr(header->path, '/') - header->path;
__appcwdlen = __appcwdlen > 1022 ? 1022 : __appcwdlen;
memcpy(__appcwd, header->path, __appcwdlen);
set_cwd(__appcwd);
#ifdef BRAVE_NEW_WORLD
len = strlen(header->path);
p = alloca(len+1);
memcpy(p, header->path, len);
p[len]=0;
arg[0] = p;
#else
arg[0] = header->path;
#endif
_argc = 1;
if( header->cmdline != 0)
{
#ifdef BRAVE_NEW_WORLD
len = strlen(header->cmdline);
if(len)
{
p = alloca(len+1);
memcpy(p, header->cmdline, len);
p[len]=0;
_argc = 2;
arg[1] = p;
};
#else
_argc = 2;
arg[1] = header->cmdline;
#endif
};
_argv = arg;
entry = get_entry_point(my_app);
// __asm__ __volatile__("int3");
retval = entry(_argc, _argv, NULL);
done:
exit (retval);
}