Initial revision

1 files changed, 153 insertions, 0 deletions

diff --git a/src/filo/main/elfnote.c b/src/filo/main/elfnote.c
new file mode 100644
index 000000000..2100ec956
--- /dev/null
+++ b/src/filo/main/elfnote.c
@@ -0,0 +1,153 @@
+/* Support for ELF Boot Proposal as a boot image */
+
+#include <etherboot.h>
+#include <elf_boot.h>
+#include <sys_info.h>
+#include <lib.h>
+
+#include "version.h"
+#define DEBUG_THIS DEBUG_ELFNOTE
+#include <debug.h>
+
+/* ELF image notes provide information to the loader who boots us */
+
+/* This compiles and generates correct PT_NOTE segment for me.
+ * If it doesn't, use assembly version below. */
+
+struct elf_image_note {
+    Elf_Nhdr hdr0;
+    char name0[sizeof(ELF_NOTE_BOOT)];
+    char prog_name[sizeof(PROGRAM_NAME)];
+
+    Elf_Nhdr hdr1;
+    char name1[sizeof(ELF_NOTE_BOOT)];
+    char version[sizeof(PROGRAM_VERSION)];
+
+    Elf_Nhdr hdr2;
+    char name2[sizeof(ELF_NOTE_BOOT)];
+    unsigned short checksum;
+};
+
+const struct elf_image_note elf_image_notes
+	__attribute__ ((section (".note.ELFBoot"))) =
+{
+    .hdr0 = {
+	.n_namesz = sizeof(ELF_NOTE_BOOT),
+	.n_descsz = sizeof(PROGRAM_NAME),
+	.n_type = EIN_PROGRAM_NAME,
+    },
+    .name0 = ELF_NOTE_BOOT,
+    .prog_name = PROGRAM_NAME,
+
+    .hdr1 = {
+	.n_namesz = sizeof(ELF_NOTE_BOOT),
+	.n_descsz = sizeof(PROGRAM_VERSION),
+	.n_type = EIN_PROGRAM_VERSION,
+    },
+    .name1 = ELF_NOTE_BOOT,
+    .version = PROGRAM_VERSION,
+
+    .hdr2 = {
+	.n_namesz = sizeof(ELF_NOTE_BOOT),
+	.n_descsz = sizeof(unsigned short),
+	.n_type = EIN_PROGRAM_CHECKSUM,
+    },
+    .name2 = ELF_NOTE_BOOT,
+    .checksum = 0, /* to be computed by external tool */
+};
+
+/* This is refered by other files */
+const char *program_name = elf_image_notes.prog_name;
+const char *program_version = elf_image_notes.version;
+
+#if 0
+
+	/* This tells the linker to make a PT_NOTE segment.
+	 * If the section is named just ".note", it will be
+	 * mixed up with useless .version notes generated by GCC.
+	 */
+	.section ".note.ELFBoot", "a"
+
+	.align 4
+	.int 2f - 1f
+	.int 4f - 3f
+	.int EIN_PROGRAM_NAME
+1:	.asciz "ELFBoot"
+2:	.align 4
+3:	.asciz PROGRAM_NAME
+4:
+
+	.align 4
+	.int 2f - 1f
+	.int 4f - 3f
+	.int EIN_PROGRAM_VERSION
+1:	.asciz "ELFBoot"
+2:	.align 4
+3:	.asciz PROGRAM_VERSION
+4:
+
+	.align 4
+	.int 2f - 1f
+	.int 4f - 3f
+	.int EIN_PROGRAM_CHECKSUM
+1:	.asciz "ELFBoot"
+2:	.align 4
+3:	.short 0
+4:
+#endif
+
+/* Collect information from the ELF bootloader
+ * Note that we have to copy them to our own memory,
+ * otherwise they might be overwritten afterward. */
+void collect_elfboot_info(struct sys_info *info)
+{
+    Elf_Bhdr *hdr = 0;
+    char *addr, *end;
+    Elf_Nhdr *nhdr;
+    char *name, *desc;
+
+    if (info->boot_type == ELF_BHDR_MAGIC)
+	hdr = phys_to_virt(info->boot_data);
+    else
+	hdr = phys_to_virt(info->boot_arg);
+
+    if (hdr->b_signature != ELF_BHDR_MAGIC)
+	return;
+
+    if (ipchksum(hdr, hdr->b_size) != 0) {
+	printf("Broken ELF boot notes\n");
+	return;
+    }
+
+    addr = (char *) (hdr + 1);
+    end = addr + hdr->b_size;
+    while (addr <  end) {
+	nhdr = (Elf_Nhdr *) addr;
+	addr += sizeof(Elf_Nhdr);
+	name = addr;
+	addr += (nhdr->n_namesz + 3) & ~3;
+	desc = addr;
+	addr += (nhdr->n_descsz + 3) & ~3;
+
+	if (nhdr->n_namesz == 0) {
+	    /* Standard notes */
+	    switch (nhdr->n_type) {
+	    case EBN_FIRMWARE_TYPE:
+		info->firmware = strdup(desc);
+		break;
+	    case EBN_BOOTLOADER_NAME:
+		debug("Bootloader: %s\n", desc);
+		break;
+	    case EBN_BOOTLOADER_VERSION:
+		debug("Version: %s\n", desc);
+		break;
+	    case EBN_COMMAND_LINE:
+		info->command_line = strdup(desc);
+		break;
+	    case EBN_LOADED_IMAGE:
+		debug("Image name: %s\n", desc);
+		break;
+	    }
+	}
+    }
+}