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DDB support

This commit is contained in:
pk 1994-03-20 09:13:37 +00:00
parent 05f8a1e6f6
commit 4f785694ac
1 changed files with 37 additions and 9 deletions
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46
sys/arch/sparc/stand/boot.c
View File

@ -32,7 +32,7 @@
*
* from: @(#)boot.c 8.1 (Berkeley) 6/10/93
*
* $Id: boot.c,v 1.1 1994/02/26 10:57:13 pk Exp $
* $Id: boot.c,v 1.2 1994/03/20 09:13:37 pk Exp $
*/
#include <sys/param.h>
@ -44,9 +44,15 @@
/*
* Boot device is derived from ROM provided information.
*/
#define LOADADDR 0x4000
extern char *version;
extern struct promvec *promvec;
char *ssym, *esym;
unsigned long esym;
char *strtab;
int strtablen;
#if 0
struct nlist *nlp, *enlp;
#endif
main(pp)
struct promvec *pp;
@ -67,8 +73,8 @@ struct promvec *pp;
}
reset_twiddle();
printf("Booting %s @ 0x%x\n", file, 0x4000);
copyunix(io, 0x4000);
printf("Booting %s @ 0x%x\n", file, LOADADDR);
copyunix(io, LOADADDR);
promvec->pv_halt();
}
@ -108,22 +114,27 @@ copyunix(io, addr)
printf("+%d", x.a_bss);
for (i = 0; i < x.a_bss; i++)
*addr++ = 0;
ssym = addr;
if (x.a_syms != 0) {
bcopy(&x.a_syms, addr, sizeof(x.a_syms));
addr += sizeof(x.a_syms);
#if 0
nlp = (struct nlist *)addr;
#endif
printf(" [%d+", x.a_syms);
if (read(io, addr, x.a_syms) != x.a_syms)
goto shread;
addr += x.a_syms;
#if 0
enlp = (struct nlist *)(strtab = addr);
#endif
reset_twiddle();
if (read(io, &i, sizeof(int)) != sizeof(int))
if (read(io, &strtablen, sizeof(int)) != sizeof(int))
goto shread;
reset_twiddle();
bcopy(&i, addr, sizeof(int));
if (i) {
bcopy(&strtablen, addr, sizeof(int));
if (i = strtablen) {
i -= sizeof(int);
addr += sizeof(int);
if (read(io, addr, i) != i)
@ -132,10 +143,26 @@ copyunix(io, addr)
addr += i;
}
printf("%d] ", i);
esym = KERNBASE +
(((int)addr + sizeof(int) - 1) & ~(sizeof(int) - 1));
}
#if 0
while (nlp < enlp) {
register int strx = nlp->n_un.n_strx;
if (strx > strtablen)
continue;
if (strcmp(strtab+strx, "_esym") == 0) {
*(int*)(nlp->n_value - KERNBASE) = esym;
break;
}
nlp++;
}
#endif
printf(" start 0x%x\n", (int)entry);
(*entry)(promvec);
#define DDB_MAGIC ( ('D'<<24) | ('D'<<16) | ('B'<<8) | ('0') )
(*entry)(promvec, esym, DDB_MAGIC);
return;
shread:
printf("Short read\n");
@ -163,3 +190,4 @@ twiddle()
putchar(tw_chars[tw_pos++]);
tw_pos %= (sizeof(tw_chars) - 1);
}