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      1 #include <stdbool.h>
      2 #include <stdlib.h>
      3 #include <stdio.h>
      4 #include <string.h>
      5 #include <console.h>
      6 #include <dprintf.h>
      7 #include <syslinux/loadfile.h>
      8 #include <syslinux/linux.h>
      9 #include <syslinux/pxe.h>
     10 #include "core.h"
     11 
     12 const char *globaldefault = NULL;
     13 const char *append = NULL;
     14 
     15 /* Will be called from readconfig.c */
     16 int new_linux_kernel(char *okernel, char *ocmdline)
     17 {
     18 	const char *kernel_name = NULL, *args = NULL;
     19 	struct initramfs *initramfs = NULL;
     20 	char *temp;
     21 	void *kernel_data;
     22 	size_t kernel_len, cmdline_len;
     23 	bool opt_quiet = false;
     24 	char *initrd_name, *cmdline;
     25 
     26 	dprintf("okernel = %s, ocmdline = %s", okernel, ocmdline);
     27 
     28 	if (okernel)
     29 		kernel_name = okernel;
     30 	else if (globaldefault)
     31 		kernel_name = globaldefault;
     32 
     33 	if (ocmdline)
     34 		args = ocmdline;
     35 	else if (append)
     36 		args = append;
     37 
     38 	cmdline_len = strlen("BOOT_IMAGE=") + strlen(kernel_name);
     39 	cmdline_len += 1;	/* space between BOOT_IMAGE and args */
     40 	cmdline_len += strlen(args);
     41 	cmdline_len += 1;	/* NUL-termination */
     42 
     43 	cmdline = malloc(cmdline_len);
     44 	if (!cmdline) {
     45 	    printf("Failed to alloc memory for cmdline\n");
     46 	    return 1;
     47 	}
     48 
     49 	sprintf(cmdline, "BOOT_IMAGE=%s %s", kernel_name, args);
     50 
     51 	/* "keeppxe" handling */
     52 #if IS_PXELINUX
     53 	extern char KeepPXE;
     54 
     55 	if (strstr(cmdline, "keeppxe"))
     56 		KeepPXE |= 1;
     57 #endif
     58 
     59 	if (strstr(cmdline, "quiet"))
     60 		opt_quiet = true;
     61 
     62 	if (!opt_quiet)
     63 		printf("Loading %s... ", kernel_name);
     64 
     65 	if (loadfile(kernel_name, &kernel_data, &kernel_len)) {
     66 		if (opt_quiet)
     67 			printf("Loading %s ", kernel_name);
     68 		printf("failed: ");
     69 		goto bail;
     70 	}
     71 
     72 	if (!opt_quiet)
     73 		printf("ok\n");
     74 
     75 	/* Find and load initramfs */
     76 	temp = strstr(cmdline, "initrd=");
     77 	if (temp) {
     78 		/* Initialize the initramfs chain */
     79 		initramfs = initramfs_init();
     80 		if (!initramfs)
     81 			goto bail;
     82 
     83 		temp += 6; /* strlen("initrd") */
     84 		do {
     85 		    size_t n = 0;
     86 		    char *p;
     87 
     88 		    temp++;	/* Skip = or , */
     89 
     90 		    p = temp;
     91 		    while (*p != ' ' && *p != ',' && *p) {
     92 			p++;
     93 			n++;
     94 		    }
     95 
     96 		    initrd_name = malloc(n + 1);
     97 		    if (!initrd_name) {
     98 			printf("Failed to allocate space for initrd\n");
     99 			goto bail;
    100 		    }
    101 
    102 		    snprintf(initrd_name, n + 1, "%s", temp);
    103 		    temp += n;
    104 
    105 		    if (!opt_quiet)
    106 			printf("Loading %s...", initrd_name);
    107 
    108 		    if (initramfs_load_archive(initramfs, initrd_name)) {
    109 			if (opt_quiet)
    110 			    printf("Loading %s ", initrd_name);
    111 			free(initrd_name);
    112 			printf("failed: ");
    113 			goto bail;
    114 		    }
    115 
    116 		    free(initrd_name);
    117 
    118 		    if (!opt_quiet)
    119 			printf("ok\n");
    120 		} while (*temp == ',');
    121 	}
    122 
    123 	/* This should not return... */
    124 	syslinux_boot_linux(kernel_data, kernel_len, initramfs, NULL, cmdline);
    125 	printf("Booting kernel failed: ");
    126 
    127 bail:
    128 	free(cmdline);
    129 	printf("%s\n", strerror(errno));
    130 	return 1;
    131 }
    132