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Add is_fcode(), is_forth() and is_aout() functions which take a pointer to an area of memory which may contain a valid loader

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Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@siriusit.co.uk>


git-svn-id: svn://coreboot.org/openbios/trunk/openbios-devel@719 f158a5a8-5612-0410-a976-696ce0be7e32
This commit is contained in:
Mark Cave-Ayland
2010-03-28 20:55:10 +00:00
committed by Mark Cave-Ayland
parent dc5c530885
commit c60fad9646
6 changed files with 33 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/libopenbios/aout_load.h
View File

@@ -17,8 +17,10 @@
#ifndef _H_AOUTLOAD
#define _H_AOUTLOAD
#include "arch/common/a.out.h"
#include "libopenbios/sys_info.h"
extern int is_aout(struct exec *ehdr);
extern int aout_load(struct sys_info *info, const char *filename);
#endif /* _H_AOUTLOAD */

1
include/libopenbios/fcode_load.h
View File

@@ -17,6 +17,7 @@
#ifndef _H_FCODELOAD
#define _H_FCODELOAD
extern int is_fcode(unsigned char *fcode);
extern int fcode_load(const char *filename);
#endif /* _H_FCODELOAD */

1
include/libopenbios/forth_load.h
View File

@@ -17,6 +17,7 @@
#ifndef _H_FORTHLOAD
#define _H_FORTHLOAD
extern int is_forth(char *forth);
extern int forth_load(const char *filename);
#endif /* _H_FORTHLOAD */

13
libopenbios/aout_load.c
View File

@@ -58,6 +58,15 @@ static int check_mem_ranges(struct sys_info *info,
return 0;
}
int is_aout(struct exec *ehdr)
{
return ((ehdr->a_info & 0xffff) == OMAGIC
|| (ehdr->a_info & 0xffff) == NMAGIC
|| (ehdr->a_info & 0xffff) == ZMAGIC
|| (ehdr->a_info & 0xffff) == QMAGIC);
}
int aout_load(struct sys_info *info, const char *filename)
{
int retval = -1;
@@ -81,11 +90,11 @@ int aout_load(struct sys_info *info, const char *filename)
retval = LOADER_NOT_SUPPORT;
goto out;
}
if (!N_BADMAG(ehdr))
if (is_aout(&ehdr))
break;
}
if (N_BADMAG(ehdr)) {
if (!is_aout(&ehdr)) {
debug("Not a bootable a.out image\n");
retval = LOADER_NOT_SUPPORT;
goto out;

18
libopenbios/fcode_load.c
View File

@@ -13,6 +13,15 @@
static int fd;
int is_fcode(unsigned char *fcode)
{
return (fcode[0] == 0xf0 // start0
|| fcode[0] == 0xf1 // start1
|| fcode[0] == 0xf2 // start2
|| fcode[0] == 0xf3 // start4
|| fcode[0] == 0xfd); // version1
}
int fcode_load(const char *filename)
{
int retval = -1;
@@ -35,14 +44,9 @@ int fcode_load(const char *filename)
retval = LOADER_NOT_SUPPORT;
goto out;
}
switch (fcode_header[0]) {
case 0xf0: // start0
case 0xf1: // start1
case 0xf2: // start2
case 0xf3: // start4
case 0xfd: // version1
if (is_fcode(fcode_header))
goto found;
}
}
debug("Not a bootable FCode image\n");

9
libopenbios/forth_load.c
View File

@@ -16,8 +16,13 @@
#define debug printk
static int fd;
static char *forthtext=NULL;
int is_forth(char *forth)
{
return (forth[0] == '\\' && forth[1] == ' ');
}
int forth_load(const char *filename)
{
char magic[2];
@@ -37,7 +42,7 @@ int forth_load(const char *filename)
goto out;
}
if (magic[0] != '\\' || magic[1] != ' ') {
if (!is_forth(magic)) {
debug("No forth source image\n");
retval = LOADER_NOT_SUPPORT;
goto out;