1 files changed, 131 insertions, 0 deletions
diff --git a/com32/elflink/ldlinux/kernel.c b/com32/elflink/ldlinux/kernel.c
new file mode 100644
index 0000000..f3ba37f
--- /dev/null
+++ b/com32/elflink/ldlinux/kernel.c
@@ -0,0 +1,131 @@
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <console.h>
+#include <dprintf.h>
+#include <syslinux/loadfile.h>
+#include <syslinux/linux.h>
+#include <syslinux/pxe.h>
+#include "core.h"
+
+const char *globaldefault = NULL;
+const char *append = NULL;
+
+/* Will be called from readconfig.c */
+int new_linux_kernel(char *okernel, char *ocmdline)
+{
+	const char *kernel_name = NULL, *args = NULL;
+	struct initramfs *initramfs = NULL;
+	char *temp;
+	void *kernel_data;
+	size_t kernel_len, cmdline_len;
+	bool opt_quiet = false;
+	char *initrd_name, *cmdline;
+
+	dprintf("okernel = %s, ocmdline = %s", okernel, ocmdline);
+
+	if (okernel)
+		kernel_name = okernel;
+	else if (globaldefault)
+		kernel_name = globaldefault;
+
+	if (ocmdline)
+		args = ocmdline;
+	else if (append)
+		args = append;
+
+	cmdline_len = strlen("BOOT_IMAGE=") + strlen(kernel_name);
+	cmdline_len += 1;	/* space between BOOT_IMAGE and args */
+	cmdline_len += strlen(args);
+	cmdline_len += 1;	/* NUL-termination */
+
+	cmdline = malloc(cmdline_len);
+	if (!cmdline) {
+	    printf("Failed to alloc memory for cmdline\n");
+	    return 1;
+	}
+
+	sprintf(cmdline, "BOOT_IMAGE=%s %s", kernel_name, args);
+
+	/* "keeppxe" handling */
+#if IS_PXELINUX
+	extern char KeepPXE;
+
+	if (strstr(cmdline, "keeppxe"))
+		KeepPXE |= 1;
+#endif
+
+	if (strstr(cmdline, "quiet"))
+		opt_quiet = true;
+
+	if (!opt_quiet)
+		printf("Loading %s... ", kernel_name);
+
+	if (loadfile(kernel_name, &kernel_data, &kernel_len)) {
+		if (opt_quiet)
+			printf("Loading %s ", kernel_name);
+		printf("failed: ");
+		goto bail;
+	}
+
+	if (!opt_quiet)
+		printf("ok\n");
+
+	/* Find and load initramfs */
+	temp = strstr(cmdline, "initrd=");
+	if (temp) {
+		/* Initialize the initramfs chain */
+		initramfs = initramfs_init();
+		if (!initramfs)
+			goto bail;
+
+		temp += 6; /* strlen("initrd") */
+		do {
+		    size_t n = 0;
+		    char *p;
+
+		    temp++;	/* Skip = or , */
+
+		    p = temp;
+		    while (*p != ' ' && *p != ',' && *p) {
+			p++;
+			n++;
+		    }
+
+		    initrd_name = malloc(n + 1);
+		    if (!initrd_name) {
+			printf("Failed to allocate space for initrd\n");
+			goto bail;
+		    }
+
+		    snprintf(initrd_name, n + 1, "%s", temp);
+		    temp += n;
+
+		    if (!opt_quiet)
+			printf("Loading %s...", initrd_name);
+
+		    if (initramfs_load_archive(initramfs, initrd_name)) {
+			if (opt_quiet)
+			    printf("Loading %s ", initrd_name);
+			free(initrd_name);
+			printf("failed: ");
+			goto bail;
+		    }
+
+		    free(initrd_name);
+
+		    if (!opt_quiet)
+			printf("ok\n");
+		} while (*temp == ',');
+	}
+
+	/* This should not return... */
+	syslinux_boot_linux(kernel_data, kernel_len, initramfs, NULL, cmdline);
+	printf("Booting kernel failed: ");
+
+bail:
+	free(cmdline);
+	printf("%s\n", strerror(errno));
+	return 1;
+}