145 lines
2.8 KiB
C
145 lines
2.8 KiB
C
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#include <_ansi.h>
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#include <reent.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <setjmp.h>
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#include <sys/kos_io.h>
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struct app_hdr
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{
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char banner[8];
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int version;
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int start;
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int iend;
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int memsize;
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int stacktop;
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char *cmdline;
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char *path;
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};
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int _argc;
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char **_argv;
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void __fastcall init_loader(void *libc_image);
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void* __fastcall create_image(void *raw);
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int __fastcall link_image(void *img_base);
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void* get_entry_point(void *raw);
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int (*entry)(int, char **, char **);
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void init_reent();
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jmp_buf loader_env;
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void __attribute__((noreturn))
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__thread_startup (int (*entry)(void*), void *param,
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void *stacklow, void *stackhigh)
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{
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int retval;
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asm volatile ( "xchgw %bx, %bx");
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__asm__ __volatile__( // save stack limits
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"movl %0, %%fs:4 \n\t" // use TLS
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"movl %1, %%fs:8 \n\t"
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::"r"(stacklow), "r"(stackhigh));
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init_reent(); // initialize thread reentry structure
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retval = entry(param); // call user thread function
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_exit(retval);
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};
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char * __libc_getenv(const char *name)
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{
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return NULL;
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}
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char __appcwd[1024];
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int __appcwdlen;
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char* __appenv;
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int __appenv_size;
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void __attribute__((noreturn))
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crt_startup (void *libc_base, void *obj_base, uint32_t *params)
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{
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struct app_hdr *header;
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char *arg[2];
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int len;
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char *p;
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void *my_app;
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int retval = 0;
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// user_free(obj_base);
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init_reent();
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__initPOSIXHandles();
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__appenv = load_file("/sys/system.env", &__appenv_size);
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init_loader(libc_base);
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my_app = create_image((void*)(params[0]));
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if( link_image(my_app)==0)
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goto done;
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header = (struct app_hdr*)NULL;
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__appcwdlen = strrchr(header->path, '/') - header->path;
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__appcwdlen = __appcwdlen > 1022 ? 1022 : __appcwdlen;
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memcpy(__appcwd, header->path, __appcwdlen);
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set_cwd(__appcwd);
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#ifdef BRAVE_NEW_WORLD
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len = strlen(header->path);
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p = alloca(len+1);
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memcpy(p, header->path, len);
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p[len]=0;
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arg[0] = p;
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#else
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arg[0] = header->path;
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#endif
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_argc = 1;
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if( header->cmdline != 0)
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{
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#ifdef BRAVE_NEW_WORLD
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len = strlen(header->cmdline);
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if(len)
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{
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p = alloca(len+1);
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memcpy(p, header->cmdline, len);
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p[len]=0;
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_argc = 2;
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arg[1] = p;
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};
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#else
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_argc = 2;
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arg[1] = header->cmdline;
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#endif
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};
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_argv = arg;
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entry = get_entry_point(my_app);
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// __asm__ __volatile__("int3");
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retval = entry(_argc, _argv, NULL);
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done:
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exit (retval);
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}
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