Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

installboot(8) now handles required a.out header munging. 

Also, the munging is extended by inserting an instruction that branches
past the header, so the same boot image can be used on all supported
sun platforms.
This commit is contained in:
pk 1996-11-29 14:55:20 +00:00
parent ebc2675469
commit af0ec0d1d4
1 changed files with 20 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
sys/arch/sparc/stand/installboot.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: installboot.c,v 1.12 1996/10/20 16:00:14 pk Exp $ */
/* $NetBSD: installboot.c,v 1.13 1996/11/29 14:55:20 pk Exp $ */
/*
* Copyright (c) 1994 Paul Kranenburg
@ -147,7 +147,7 @@ main(argc, argv)
}
if (strcmp(karch, "sun4") == 0) {
hflag = 0;
hflag = 1;
} else if (strcmp(karch, "sun4c") == 0) {
hflag = 1;
} else if (strcmp(karch, "sun4m") == 0) {
@ -283,6 +283,24 @@ loadprotoblocks(fname, size)
max_block_count, nl[X_BLOCKTABLE].n_value);
}
/*
* We convert the a.out header in-vitro into something that
* Sun PROMs understand.
* Old-style (sun4) ROMs do not expect a header at all, so
* we turn the first two words into code that gets us past
* the 32-byte header where the actual code begins. In assembly
* speak:
* .word MAGIC ! a NOP
* ba,a start !
* .skip 24 ! pad
* start:
*/
#define SUN_MAGIC 0x01030107
#define SUN4_BASTART 0x30800007 /* i.e.: ba,a `start' */
*((int *)bp) = SUN_MAGIC;
*((int *)bp + 1) = SUN4_BASTART;
*size = sz;
return (hflag ? bp : (bp + sizeof(struct exec)));
}