File pxeboot_amd64.patch of Package openbsd-pxeboot

--- sys/arch/amd64/stand/pxeboot/srt0.S	Fri Mar 19 08:48:19 2004
+++ sys/arch/amd64/stand/pxeboot/srt0.S	Mon Oct 22 11:40:12 2007
@@ -34,6 +34,7 @@
 	.globl	_C_LABEL(end)
 	.globl	_C_LABEL(edata)
 	.globl	_C_LABEL(boot)
+       .globl  _C_LABEL(boot_params)
 	.globl	_C_LABEL(_rtt)
 	.globl	_C_LABEL(bios_bootdev)
 	.globl	_ASM_LABEL(pmm_init)
@@ -143,6 +144,12 @@ relocated:
 	movl	$_C_LABEL(edata), %edi
 	cld
 	rep;	stosb
+
+       /* Point at the boot params */
+       movl    $_C_LABEL(edata), %esi
+       subl    $_C_LABEL(_start), %esi
+       addl    $PXEBOOTADDR, %esi
+       movl    %esi, _C_LABEL(boot_params)
 
 	/* Set our program name ("PXEBOOT", not "BOOT"). */
 	movl	$pxe_progname, %eax
--- sys/stand/boot/cmd.c	Wed Feb 28 11:15:25 2007
+++ sys/stand/boot/cmd.c	Mon Oct 22 11:40:12 2007
@@ -80,6 +80,8 @@ char *nextword(char *);
 static char *whatcmd(const struct cmd_table **ct, char *);
 static char *qualify(char *);
 
+const char* boot_params = NULL;
+const char boot_params_sig[11] = "BootParams:";
 char cmd_buf[CMD_BUFF_SIZE];
 
 int
@@ -99,24 +101,34 @@ read_conf(void)
 #ifndef INSECURE
 	struct stat sb;
 #endif
-	int fd, rc = 0;
+       int fd = 0, rc = 0;
 
-	if ((fd = open(qualify(cmd.conf), 0)) < 0) {
-		if (errno != ENOENT && errno != ENXIO) {
-			printf("open(%s): %s\n", cmd.path, strerror(errno));
-			return 0;
+       if (!boot_params ||
+           strncmp(boot_params, boot_params_sig, 
+               sizeof(boot_params_sig)) != 0 ||
+           *(boot_params += sizeof(boot_params_sig)) == '\0')
+               boot_params = NULL;
+
+       if (!boot_params) {
+               if ((fd = open(qualify(cmd.conf), 0)) < 0) {
+                       if (errno != ENOENT && errno != ENXIO) {
+                               printf("open(%s): %s\n", cmd.path,
+                                   strerror(errno));
+                               return 0;
+                       }
+                       return -1;
 		}
-		return -1;
-	}
 
 #ifndef INSECURE
-	(void) fstat(fd, &sb);
-	if (sb.st_uid || (sb.st_mode & 2)) {
-		printf("non-secure %s, will not proceed\n", cmd.path);
-		close(fd);
-		return -1;
-	}
+               (void) fstat(fd, &sb);
+               if (sb.st_uid || (sb.st_mode & 2)) {
+                       printf("non-secure %s, will not proceed\n",
+                           cmd.path);
+                       close(fd);
+                       return -1;
+               }
 #endif
+       }
 
 	do {
 		char *p = cmd_buf;
@@ -124,7 +136,14 @@ read_conf(void)
 		cmd.cmd = NULL;
 
 		do {
-			rc = read(fd, p, 1);
+                       if (boot_params) {
+                               *p = *(boot_params++);
+                               if( *p == ';' )
+                                       *p = '\n';
+                               rc = *p == '\0' ? 0 : 1;
+                       } else {
+                               rc = read(fd, p, 1);
+                       }
 		} while (rc > 0 && *p++ != '\n' &&
 		    (p-cmd_buf) < sizeof(cmd_buf));