diff options
Diffstat (limited to 'sys/arch/i386/stand/libsa/exec_i386.c')
-rw-r--r-- | sys/arch/i386/stand/libsa/exec_i386.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/sys/arch/i386/stand/libsa/exec_i386.c b/sys/arch/i386/stand/libsa/exec_i386.c new file mode 100644 index 00000000000..0cf8f40987a --- /dev/null +++ b/sys/arch/i386/stand/libsa/exec_i386.c @@ -0,0 +1,79 @@ + +/* $OpenBSD: exec_i386.c,v 1.4 1997/04/04 17:23:29 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; + +void +machdep_start(startaddr, howto, loadaddr, ssym, esym) + char *startaddr, *loadaddr, *ssym, *esym; + int howto; +{ + static int argv[9]; + struct exec *x; + + +#ifdef DEBUG + 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)esym; + argv[5] = (int)startaddr; + argv[6] = 0; + argv[7] = biosmem(0); + argv[8] = biosmem(1); + +#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); +} + |