Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / openbios / libopenbios / elf_info.c

diff --git a/qemu/roms/openbios/libopenbios/elf_info.c b/qemu/roms/openbios/libopenbios/elf_info.c
new file mode 100644 (file)
index 0000000..f7febef
--- /dev/null
+++ b/qemu/roms/openbios/libopenbios/elf_info.c
@@ -0,0 +1,151 @@
+/* Support for ELF Boot Proposal as a boot image */
+#include "config.h"
+#include "arch/common/elf_boot.h"
+#include "libopenbios/sys_info.h"
+#include "asm/io.h"
+#include "libopenbios/ipchecksum.h"
+#include "openbios-version.h"
+#define printf printk
+#define debug  printk
+
+/* 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(OPENBIOS_VERSION_STR)];
+
+    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(OPENBIOS_VERSION_STR),
+       .n_type = EIN_PROGRAM_VERSION,
+    },
+    .name1 = ELF_NOTE_BOOT,
+    .version = OPENBIOS_VERSION_STR,
+
+    .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 OPENBIOS_VERSION_STR
+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 = NULL;
+    char *addr, *end;
+    Elf_Nhdr *nhdr;
+    char *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);
+       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;
+           }
+       }
+    }
+}