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/* $OpenBSD: exec_i386.c,v 1.6 1997/04/11 19:14:18 weingart Exp $ */
#include <sys/param.h>
#include <sys/exec.h>
#include <sys/reboot.h>
#include <libsa.h>
#include <biosdev.h>
int startprog(void *, void *);
static int bootdev;
#define round_to_size(x) (((int)(x) + sizeof(int) - 1) & ~(sizeof(int) - 1))
void
machdep_start(startaddr, howto, loadaddr, ssym, esym)
char *startaddr, *loadaddr, *ssym, *esym;
int howto;
{
static int argv[9];
#ifdef DEBUG
struct exec *x;
x = (void *)loadaddr;
printf("exec {\n");
printf(" a_midmag = %lx\n", x->a_midmag);
printf(" a_text = %lx\n", x->a_text);
printf(" a_data = %lx\n", x->a_data);
printf(" a_bss = %lx\n", x->a_bss);
printf(" a_syms = %lx\n", x->a_syms);
printf(" a_entry = %lx\n", x->a_entry);
printf(" a_trsize = %lx\n", x->a_trsize);
printf(" a_drsize = %lx\n", x->a_drsize);
printf("}\n");
getchar();
#endif
(int)startaddr &= 0xffffff;
/*
* We now pass the various bootstrap parameters to the loaded
* image via the argument list
*
* arg0 = 8 (magic)
* arg1 = boot flags
* arg2 = boot device
* arg3 = start of symbol table (0 if not loaded)
* arg4 = end of symbol table (0 if not loaded)
* arg5 = transfer address from image
* arg6 = transfer address for next image pointer
* arg7 = conventional memory size (640)
* arg8 = extended memory size (8196)
*/
argv[0] = 8;
argv[1] = howto;
argv[2] = bootdev;
argv[3] = (int)ssym;
argv[4] = (int)round_to_size(esym);
argv[5] = (int)startaddr;
argv[6] = 0;
argv[7] = cnvmem;
argv[8] = extmem;
#ifdef DEBUG
{ int i;
for(i = 0; i <= argv[0]; i++)
printf("argv[%d] = %x\n", i, argv[i]);
getchar();
}
#endif
/****************************************************************/
/* copy that first page and overwrite any BIOS variables */
/****************************************************************/
printf("entry point at 0x%x\n", (int)startaddr);
startprog(startaddr, argv);
}
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