ELF_HANDLE_DECL(elf_phdr) elf_phdr_by_index(struct elf_binary *elf, unsigned index)
{
uint64_t count = elf_uval(elf, elf->ehdr, e_phnum);
elf_ptrval ptr;
if ( index >= count )
return ELF_INVALID_HANDLE(elf_phdr);
ptr = (ELF_IMAGE_BASE(elf)
+ elf_uval(elf, elf->ehdr, e_phoff)
+ elf_uval(elf, elf->ehdr, e_phentsize) * index);
return ELF_MAKE_HANDLE(elf_phdr, ptr);
}
static char *xc_dom_guest_type(struct xc_dom_image *dom,
struct elf_binary *elf)
{
uint64_t machine = elf_uval(elf, elf->ehdr, e_machine);
if ( dom->container_type == XC_DOM_HVM_CONTAINER &&
dom->parms.phys_entry != UNSET_ADDR32 )
return "hvm-3.0-x86_32";
switch ( machine )
{
case EM_386:
switch ( dom->parms.pae )
{
case XEN_PAE_BIMODAL:
if ( strstr(dom->xen_caps, "xen-3.0-x86_32p") )
return "xen-3.0-x86_32p";
return "xen-3.0-x86_32";
case XEN_PAE_EXTCR3:
case XEN_PAE_YES:
return "xen-3.0-x86_32p";
case XEN_PAE_NO:
default:
return "xen-3.0-x86_32";
}
case EM_X86_64:
return "xen-3.0-x86_64";
default:
return "xen-3.0-unknown";
}
}
static char *xc_dom_guest_type(struct xc_dom_image *dom,
struct elf_binary *elf)
{
uint64_t machine = elf_uval(elf, elf->ehdr, e_machine);
switch ( machine )
{
case EM_386:
switch ( dom->parms.pae )
{
case 3 /* PAEKERN_bimodal */:
if ( strstr(dom->xen_caps, "xen-3.0-x86_32p") )
return "xen-3.0-x86_32p";
return "xen-3.0-x86_32";
case PAEKERN_extended_cr3:
case PAEKERN_yes:
return "xen-3.0-x86_32p";
case PAEKERN_no:
default:
return "xen-3.0-x86_32";
}
case EM_X86_64:
return "xen-3.0-x86_64";
case EM_IA_64:
return elf_msb(elf) ? "xen-3.0-ia64be" : "xen-3.0-ia64";
case EM_PPC64:
return "xen-3.0-powerpc64";
default:
return "xen-3.0-unknown";
}
}
static char *xc_dom_guest_type(struct xc_dom_image *dom,
struct elf_binary *elf)
{
uint64_t machine = elf_uval(elf, elf->ehdr, e_machine);
switch ( machine )
{
case EM_386:
switch ( dom->parms.pae )
{
case XEN_PAE_BIMODAL:
if ( strstr(dom->xen_caps, "xen-3.0-x86_32p") )
return "xen-3.0-x86_32p";
return "xen-3.0-x86_32";
case XEN_PAE_EXTCR3:
case XEN_PAE_YES:
return "xen-3.0-x86_32p";
case XEN_PAE_NO:
default:
return "xen-3.0-x86_32";
}
case EM_X86_64:
return "xen-3.0-x86_64";
default:
return "xen-3.0-unknown";
}
}
static void print_numeric_note(const char *prefix, struct elf_binary *elf,
const elf_note *note)
{
uint64_t value = elf_note_numeric(elf, note);
int descsz = elf_uval(elf, note, descsz);
printf("%s: %#*" PRIx64 " (%d bytes)\n",
prefix, 2+2*descsz, value, descsz);
}
unsigned elf_shdr_count(struct elf_binary *elf)
{
unsigned count = elf_uval(elf, elf->ehdr, e_shnum);
uint64_t max = elf->size / sizeof(Elf32_Shdr);
if (max > ~(unsigned)0)
max = ~(unsigned)0; /* Xen doesn't have limits.h :-/ */
if (count > max)
{
elf_mark_broken(elf, "far too many section headers");
count = max;
}
return count;
}
static void print_l1_mfn_valid_note(const char *prefix, struct elf_binary *elf,
const elf_note *note)
{
int descsz = elf_uval(elf, note, descsz);
const uint32_t *desc32 = elf_note_desc(elf, note);
const uint64_t *desc64 = elf_note_desc(elf, note);
/* XXX should be able to cope with a list of values. */
switch ( descsz / 2 )
{
case 8:
printf("%s: mask=%#"PRIx64" value=%#"PRIx64"\n", prefix,
desc64[0], desc64[1]);
break;
case 4:
printf("%s: mask=%#"PRIx32" value=%#"PRIx32"\n", prefix,
desc32[0],desc32[1]);
break;
}
}
int __init construct_dom0(
struct domain *d,
unsigned long _image_start, unsigned long image_len,
unsigned long _initrd_start, unsigned long initrd_len,
char *cmdline)
{
int i, rc, compatible, compat32, order, machine;
struct cpu_user_regs *regs;
unsigned long pfn, mfn;
unsigned long nr_pages;
unsigned long nr_pt_pages;
unsigned long alloc_spfn;
unsigned long alloc_epfn;
unsigned long count;
struct page_info *page = NULL;
start_info_t *si;
struct vcpu *v = d->vcpu[0];
unsigned long long value;
#if defined(__i386__)
char *image_start = (char *)_image_start; /* use lowmem mappings */
char *initrd_start = (char *)_initrd_start; /* use lowmem mappings */
#elif defined(__x86_64__)
char *image_start = __va(_image_start);
char *initrd_start = __va(_initrd_start);
#endif
#if CONFIG_PAGING_LEVELS >= 4
l4_pgentry_t *l4tab = NULL, *l4start = NULL;
#endif
l3_pgentry_t *l3tab = NULL, *l3start = NULL;
l2_pgentry_t *l2tab = NULL, *l2start = NULL;
l1_pgentry_t *l1tab = NULL, *l1start = NULL;
/*
* This fully describes the memory layout of the initial domain. All
* *_start address are page-aligned, except v_start (and v_end) which are
* superpage-aligned.
*/
struct elf_binary elf;
struct elf_dom_parms parms;
unsigned long vkern_start;
unsigned long vkern_end;
unsigned long vinitrd_start;
unsigned long vinitrd_end;
unsigned long vphysmap_start;
unsigned long vphysmap_end;
unsigned long vstartinfo_start;
unsigned long vstartinfo_end;
unsigned long vstack_start;
unsigned long vstack_end;
unsigned long vpt_start;
unsigned long vpt_end;
unsigned long v_start;
unsigned long v_end;
/* Machine address of next candidate page-table page. */
unsigned long mpt_alloc;
/* Sanity! */
BUG_ON(d->domain_id != 0);
BUG_ON(d->vcpu[0] == NULL);
BUG_ON(v->is_initialised);
printk("*** LOADING DOMAIN 0 ***\n");
d->max_pages = ~0U;
nr_pages = compute_dom0_nr_pages();
if ( (rc = elf_init(&elf, image_start, image_len)) != 0 )
return rc;
#ifdef VERBOSE
elf_set_verbose(&elf);
#endif
elf_parse_binary(&elf);
if ( (rc = elf_xen_parse(&elf, &parms)) != 0 )
return rc;
/* compatibility check */
compatible = 0;
compat32 = 0;
machine = elf_uval(&elf, elf.ehdr, e_machine);
switch (CONFIG_PAGING_LEVELS) {
case 3: /* x86_32p */
if (parms.pae == PAEKERN_bimodal)
parms.pae = PAEKERN_extended_cr3;
printk(" Xen kernel: 32-bit, PAE, lsb\n");
if (elf_32bit(&elf) && parms.pae && machine == EM_386)
compatible = 1;
break;
case 4: /* x86_64 */
printk(" Xen kernel: 64-bit, lsb, compat32\n");
if (elf_32bit(&elf) && parms.pae == PAEKERN_bimodal)
parms.pae = PAEKERN_extended_cr3;
if (elf_32bit(&elf) && parms.pae && machine == EM_386)
{
compat32 = 1;
compatible = 1;
}
if (elf_64bit(&elf) && machine == EM_X86_64)
compatible = 1;
break;
}
printk(" Dom0 kernel: %s%s, %s, paddr 0x%" PRIx64 " -> 0x%" PRIx64 "\n",
elf_64bit(&elf) ? "64-bit" : "32-bit",
parms.pae ? ", PAE" : "",
elf_msb(&elf) ? "msb" : "lsb",
elf.pstart, elf.pend);
if ( elf.bsd_symtab_pstart )
printk(" Dom0 symbol map 0x%" PRIx64 " -> 0x%" PRIx64 "\n",
elf.bsd_symtab_pstart, elf.bsd_symtab_pend);
if ( !compatible )
{
printk("Mismatch between Xen and DOM0 kernel\n");
return -EINVAL;
}
#if defined(__x86_64__)
if ( compat32 )
{
l1_pgentry_t gdt_l1e;
d->arch.is_32bit_pv = d->arch.has_32bit_shinfo = 1;
v->vcpu_info = (void *)&d->shared_info->compat.vcpu_info[0];
if ( nr_pages != (unsigned int)nr_pages )
nr_pages = UINT_MAX;
/*
* Map compatibility Xen segments into every VCPU's GDT. See
* arch_domain_create() for further comments.
*/
gdt_l1e = l1e_from_page(virt_to_page(compat_gdt_table),
PAGE_HYPERVISOR);
for ( i = 0; i < MAX_VIRT_CPUS; i++ )
d->arch.mm_perdomain_pt[((i << GDT_LDT_VCPU_SHIFT) +
FIRST_RESERVED_GDT_PAGE)] = gdt_l1e;
flush_tlb_one_local(GDT_LDT_VIRT_START + FIRST_RESERVED_GDT_BYTE);
}
#endif
if ( parms.pae == PAEKERN_extended_cr3 )
set_bit(VMASST_TYPE_pae_extended_cr3, &d->vm_assist);
if ( (parms.virt_hv_start_low != UNSET_ADDR) && elf_32bit(&elf) )
{
unsigned long mask = (1UL << L2_PAGETABLE_SHIFT) - 1;
value = (parms.virt_hv_start_low + mask) & ~mask;
BUG_ON(!is_pv_32bit_domain(d));
#if defined(__i386__)
if ( value > HYPERVISOR_VIRT_START )
panic("Domain 0 expects too high a hypervisor start address.\n");
#else
if ( value > __HYPERVISOR_COMPAT_VIRT_START )
panic("Domain 0 expects too high a hypervisor start address.\n");
HYPERVISOR_COMPAT_VIRT_START(d) =
max_t(unsigned int, m2p_compat_vstart, value);
#endif
}
unsigned elf_phdr_count(struct elf_binary *elf)
{
return elf_uval(elf, elf->ehdr, e_phnum);
}
int __init construct_dom0(
struct domain *d,
const module_t *image, unsigned long image_headroom,
module_t *initrd,
void *(*bootstrap_map)(const module_t *),
char *cmdline)
{
int i, cpu, rc, compatible, compat32, order, machine;
struct cpu_user_regs *regs;
unsigned long pfn, mfn;
unsigned long nr_pages;
unsigned long nr_pt_pages;
unsigned long alloc_spfn;
unsigned long alloc_epfn;
unsigned long initrd_pfn = -1, initrd_mfn = 0;
unsigned long count;
struct page_info *page = NULL;
start_info_t *si;
struct vcpu *v = d->vcpu[0];
unsigned long long value;
char *image_base = bootstrap_map(image);
unsigned long image_len = image->mod_end;
char *image_start = image_base + image_headroom;
unsigned long initrd_len = initrd ? initrd->mod_end : 0;
#if CONFIG_PAGING_LEVELS < 4
module_t mpt;
void *mpt_ptr;
#else
l4_pgentry_t *l4tab = NULL, *l4start = NULL;
#endif
l3_pgentry_t *l3tab = NULL, *l3start = NULL;
l2_pgentry_t *l2tab = NULL, *l2start = NULL;
l1_pgentry_t *l1tab = NULL, *l1start = NULL;
/*
* This fully describes the memory layout of the initial domain. All
* *_start address are page-aligned, except v_start (and v_end) which are
* superpage-aligned.
*/
struct elf_binary elf;
struct elf_dom_parms parms;
unsigned long vkern_start;
unsigned long vkern_end;
unsigned long vinitrd_start;
unsigned long vinitrd_end;
unsigned long vphysmap_start;
unsigned long vphysmap_end;
unsigned long vstartinfo_start;
unsigned long vstartinfo_end;
unsigned long vstack_start;
unsigned long vstack_end;
unsigned long vpt_start;
unsigned long vpt_end;
unsigned long v_start;
unsigned long v_end;
/* Machine address of next candidate page-table page. */
paddr_t mpt_alloc;
/* Sanity! */
BUG_ON(d->domain_id != 0);
BUG_ON(d->vcpu[0] == NULL);
BUG_ON(v->is_initialised);
printk("*** LOADING DOMAIN 0 ***\n");
d->max_pages = ~0U;
if ( (rc = bzimage_parse(image_base, &image_start, &image_len)) != 0 )
return rc;
if ( (rc = elf_init(&elf, image_start, image_len)) != 0 )
return rc;
#ifdef VERBOSE
elf_set_verbose(&elf);
#endif
elf_parse_binary(&elf);
if ( (rc = elf_xen_parse(&elf, &parms)) != 0 )
return rc;
/* compatibility check */
compatible = compat32 = 0;
machine = elf_uval(&elf, elf.ehdr, e_machine);
switch (CONFIG_PAGING_LEVELS) {
case 3: /* x86_32p */
if (parms.pae == PAEKERN_bimodal)
parms.pae = PAEKERN_extended_cr3;
printk(" Xen kernel: 32-bit, PAE, lsb\n");
if (elf_32bit(&elf) && parms.pae && machine == EM_386)
compatible = 1;
break;
case 4: /* x86_64 */
printk(" Xen kernel: 64-bit, lsb, compat32\n");
if (elf_32bit(&elf) && parms.pae == PAEKERN_bimodal)
parms.pae = PAEKERN_extended_cr3;
if (elf_32bit(&elf) && parms.pae && machine == EM_386)
{
compat32 = 1;
compatible = 1;
}
if (elf_64bit(&elf) && machine == EM_X86_64)
compatible = 1;
break;
}
printk(" Dom0 kernel: %s%s, %s, paddr 0x%" PRIx64 " -> 0x%" PRIx64 "\n",
elf_64bit(&elf) ? "64-bit" : "32-bit",
parms.pae ? ", PAE" : "",
elf_msb(&elf) ? "msb" : "lsb",
elf.pstart, elf.pend);
if ( elf.bsd_symtab_pstart )
printk(" Dom0 symbol map 0x%" PRIx64 " -> 0x%" PRIx64 "\n",
elf.bsd_symtab_pstart, elf.bsd_symtab_pend);
if ( !compatible )
{
printk("Mismatch between Xen and DOM0 kernel\n");
return -EINVAL;
}
if ( parms.elf_notes[XEN_ELFNOTE_SUPPORTED_FEATURES].type != XEN_ENT_NONE &&
!test_bit(XENFEAT_dom0, parms.f_supported) )
{
printk("Kernel does not support Dom0 operation\n");
return -EINVAL;
}
#if defined(__x86_64__)
if ( compat32 )
{
d->arch.is_32bit_pv = d->arch.has_32bit_shinfo = 1;
v->vcpu_info = (void *)&d->shared_info->compat.vcpu_info[0];
if ( setup_compat_arg_xlat(v) != 0 )
BUG();
}
#endif
nr_pages = compute_dom0_nr_pages(d, &parms, initrd_len);
if ( parms.pae == PAEKERN_extended_cr3 )
set_bit(VMASST_TYPE_pae_extended_cr3, &d->vm_assist);
if ( (parms.virt_hv_start_low != UNSET_ADDR) && elf_32bit(&elf) )
{
unsigned long mask = (1UL << L2_PAGETABLE_SHIFT) - 1;
value = (parms.virt_hv_start_low + mask) & ~mask;
BUG_ON(!is_pv_32bit_domain(d));
#if defined(__i386__)
if ( value > HYPERVISOR_VIRT_START )
panic("Domain 0 expects too high a hypervisor start address.\n");
#else
if ( value > __HYPERVISOR_COMPAT_VIRT_START )
panic("Domain 0 expects too high a hypervisor start address.\n");
HYPERVISOR_COMPAT_VIRT_START(d) =
max_t(unsigned int, m2p_compat_vstart, value);
#endif
}
static int xc_dom_load_elf_symtab(struct xc_dom_image *dom,
struct elf_binary *elf, int load)
{
struct elf_binary syms;
const elf_shdr *shdr, *shdr2;
xen_vaddr_t symtab, maxaddr;
char *hdr;
size_t size;
int h, count, type, i, tables = 0;
if ( elf_swap(elf) )
{
xc_dom_printf("%s: non-native byte order, bsd symtab not supported\n",
__FUNCTION__);
return 0;
}
if ( load )
{
if ( !dom->bsd_symtab_start )
return 0;
size = dom->kernel_seg.vend - dom->bsd_symtab_start;
hdr = xc_dom_vaddr_to_ptr(dom, dom->bsd_symtab_start);
*(int *)hdr = size - sizeof(int);
}
else
{
size = sizeof(int) + elf_size(elf, elf->ehdr) +
elf_shdr_count(elf) * elf_size(elf, shdr);
hdr = xc_dom_malloc(dom, size);
if ( hdr == NULL )
return 0;
dom->bsd_symtab_start = elf_round_up(&syms, dom->kernel_seg.vend);
}
memcpy(hdr + sizeof(int),
elf->image,
elf_size(elf, elf->ehdr));
memcpy(hdr + sizeof(int) + elf_size(elf, elf->ehdr),
elf->image + elf_uval(elf, elf->ehdr, e_shoff),
elf_shdr_count(elf) * elf_size(elf, shdr));
if ( elf_64bit(elf) )
{
Elf64_Ehdr *ehdr = (Elf64_Ehdr *)(hdr + sizeof(int));
ehdr->e_phoff = 0;
ehdr->e_phentsize = 0;
ehdr->e_phnum = 0;
ehdr->e_shoff = elf_size(elf, elf->ehdr);
ehdr->e_shstrndx = SHN_UNDEF;
}
else
{
Elf32_Ehdr *ehdr = (Elf32_Ehdr *)(hdr + sizeof(int));
ehdr->e_phoff = 0;
ehdr->e_phentsize = 0;
ehdr->e_phnum = 0;
ehdr->e_shoff = elf_size(elf, elf->ehdr);
ehdr->e_shstrndx = SHN_UNDEF;
}
if ( elf_init(&syms, hdr + sizeof(int), size - sizeof(int)) )
return -1;
if ( xc_dom_logfile )
elf_set_logfile(&syms, xc_dom_logfile, 1);
symtab = dom->bsd_symtab_start + sizeof(int);
maxaddr = elf_round_up(&syms, symtab + elf_size(&syms, syms.ehdr) +
elf_shdr_count(&syms) * elf_size(&syms, shdr));
xc_dom_printf("%s/%s: bsd_symtab_start=%" PRIx64 ", kernel.end=0x%" PRIx64
" -- symtab=0x%" PRIx64 ", maxaddr=0x%" PRIx64 "\n",
__FUNCTION__, load ? "load" : "parse",
dom->bsd_symtab_start, dom->kernel_seg.vend,
symtab, maxaddr);
count = elf_shdr_count(&syms);
for ( h = 0; h < count; h++ )
{
shdr = elf_shdr_by_index(&syms, h);
type = elf_uval(&syms, shdr, sh_type);
if ( type == SHT_STRTAB )
{
/* Look for a strtab @i linked to symtab @h. */
for ( i = 0; i < count; i++ )
{
shdr2 = elf_shdr_by_index(&syms, i);
if ( (elf_uval(&syms, shdr2, sh_type) == SHT_SYMTAB) &&
(elf_uval(&syms, shdr2, sh_link) == h) )
break;
}
/* Skip symtab @h if we found no corresponding strtab @i. */
if ( i == count )
{
if ( elf_64bit(&syms) )
*(Elf64_Off*)(&shdr->e64.sh_offset) = 0;
else
*(Elf32_Off*)(&shdr->e32.sh_offset) = 0;
continue;
}
}
if ( (type == SHT_STRTAB) || (type == SHT_SYMTAB) )
{
/* Mangled to be based on ELF header location. */
if ( elf_64bit(&syms) )
*(Elf64_Off*)(&shdr->e64.sh_offset) = maxaddr - symtab;
else
*(Elf32_Off*)(&shdr->e32.sh_offset) = maxaddr - symtab;
size = elf_uval(&syms, shdr, sh_size);
maxaddr = elf_round_up(&syms, maxaddr + size);
tables++;
xc_dom_printf("%s: h=%d %s, size=0x%zx, maxaddr=0x%" PRIx64 "\n",
__FUNCTION__, h,
type == SHT_SYMTAB ? "symtab" : "strtab",
size, maxaddr);
if ( load )
{
shdr2 = elf_shdr_by_index(elf, h);
memcpy((void*)elf_section_start(&syms, shdr),
elf_section_start(elf, shdr2),
size);
}
}
/* Name is NULL. */
if ( elf_64bit(&syms) )
*(Elf64_Half*)(&shdr->e64.sh_name) = 0;
else
*(Elf32_Word*)(&shdr->e32.sh_name) = 0;
}
if ( tables == 0 )
{
xc_dom_printf("%s: no symbol table present\n", __FUNCTION__);
dom->bsd_symtab_start = 0;
return 0;
}
if ( !load )
dom->kernel_seg.vend = maxaddr;
return 0;
}
[XEN_ELFNOTE_PADDR_OFFSET] = { "PADDR_OFFSET", 0},
[XEN_ELFNOTE_HV_START_LOW] = { "HV_START_LOW", 0},
[XEN_ELFNOTE_XEN_VERSION] = { "XEN_VERSION", 1},
[XEN_ELFNOTE_GUEST_OS] = { "GUEST_OS", 1},
[XEN_ELFNOTE_GUEST_VERSION] = { "GUEST_VERSION", 1},
[XEN_ELFNOTE_LOADER] = { "LOADER", 1},
[XEN_ELFNOTE_PAE_MODE] = { "PAE_MODE", 1},
[XEN_ELFNOTE_FEATURES] = { "FEATURES", 1},
[XEN_ELFNOTE_BSD_SYMTAB] = { "BSD_SYMTAB", 1},
[XEN_ELFNOTE_SUSPEND_CANCEL] = { "SUSPEND_CANCEL", 0 },
};
/* *INDENT-ON* */
const char *str = NULL;
uint64_t val = 0;
int type = elf_uval(elf, note, type);
if ( (type >= sizeof(note_desc) / sizeof(note_desc[0])) ||
(note_desc[type].name == NULL) )
{
elf_msg(elf, "%s: unknown xen elf note (0x%x)\n",
__FUNCTION__, type);
return 0;
}
if ( note_desc[type].str )
{
str = elf_note_desc(elf, note);
elf_msg(elf, "%s: %s = \"%s\"\n", __FUNCTION__,
note_desc[type].name, str);
parms->elf_notes[type].type = XEN_ENT_STR;
[XEN_ELFNOTE_GUEST_OS] = { "GUEST_OS", 1},
[XEN_ELFNOTE_GUEST_VERSION] = { "GUEST_VERSION", 1},
[XEN_ELFNOTE_LOADER] = { "LOADER", 1},
[XEN_ELFNOTE_PAE_MODE] = { "PAE_MODE", 1},
[XEN_ELFNOTE_FEATURES] = { "FEATURES", 1},
[XEN_ELFNOTE_SUPPORTED_FEATURES] = { "SUPPORTED_FEATURES", 0},
[XEN_ELFNOTE_BSD_SYMTAB] = { "BSD_SYMTAB", 1},
[XEN_ELFNOTE_SUSPEND_CANCEL] = { "SUSPEND_CANCEL", 0 },
[XEN_ELFNOTE_MOD_START_PFN] = { "MOD_START_PFN", 0 },
};
/* *INDENT-ON* */
const char *str = NULL;
uint64_t val = 0;
unsigned int i;
unsigned type = elf_uval(elf, note, type);
if ( (type >= sizeof(note_desc) / sizeof(note_desc[0])) ||
(note_desc[type].name == NULL) )
{
elf_msg(elf, "%s: unknown xen elf note (0x%x)\n",
__FUNCTION__, type);
return 0;
}
if ( note_desc[type].str )
{
str = elf_strval(elf, elf_note_desc(elf, note));
if (str == NULL)
/* elf_strval will mark elf broken if it fails so no need to log */
return 0;
static int print_notes(struct elf_binary *elf, const elf_note *start, const elf_note *end)
{
const elf_note *note;
int notes_found = 0;
for ( note = start; note < end; note = elf_note_next(elf, note) )
{
if (0 != strcmp(elf_note_name(elf, note), "Xen"))
continue;
notes_found++;
switch(elf_uval(elf, note, type))
{
case XEN_ELFNOTE_INFO:
print_string_note("INFO", elf , note);
break;
case XEN_ELFNOTE_ENTRY:
print_numeric_note("ENTRY", elf , note);
break;
case XEN_ELFNOTE_HYPERCALL_PAGE:
print_numeric_note("HYPERCALL_PAGE", elf , note);
break;
case XEN_ELFNOTE_VIRT_BASE:
print_numeric_note("VIRT_BASE", elf , note);
break;
case XEN_ELFNOTE_PADDR_OFFSET:
print_numeric_note("PADDR_OFFSET", elf , note);
break;
case XEN_ELFNOTE_XEN_VERSION:
print_string_note("XEN_VERSION", elf , note);
break;
case XEN_ELFNOTE_GUEST_OS:
print_string_note("GUEST_OS", elf , note);
break;
case XEN_ELFNOTE_GUEST_VERSION:
print_string_note("GUEST_VERSION", elf , note);
break;
case XEN_ELFNOTE_LOADER:
print_string_note("LOADER", elf , note);
break;
case XEN_ELFNOTE_PAE_MODE:
print_string_note("PAE_MODE", elf , note);
break;
case XEN_ELFNOTE_FEATURES:
print_string_note("FEATURES", elf , note);
break;
case XEN_ELFNOTE_HV_START_LOW:
print_numeric_note("HV_START_LOW", elf , note);
break;
case XEN_ELFNOTE_SUSPEND_CANCEL:
print_numeric_note("SUSPEND_CANCEL", elf, note);
break;
case XEN_ELFNOTE_L1_MFN_VALID:
print_l1_mfn_valid_note("L1_MFN_VALID", elf , note);
break;
default:
printf("unknown note type %#x\n",
(int)elf_uval(elf, note, type));
break;
}
}
return notes_found;
}
int main(int argc, char **argv)
{
const char *f;
int fd,h,size,usize,count;
void *image,*tmp;
struct stat st;
struct elf_binary elf;
const elf_shdr *shdr;
int notes_found = 0;
if (argc != 2)
{
fprintf(stderr, "Usage: readnotes <elfimage>\n");
return 1;
}
f = argv[1];
fd = open(f, O_RDONLY);
if (fd == -1)
{
fprintf(stderr, "Unable to open %s: %s\n", f, strerror(errno));
return 1;
}
if (fstat(fd, &st) == -1)
{
fprintf(stderr, "Unable to determine size of %s: %s\n",
f, strerror(errno));
return 1;
}
image = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (image == MAP_FAILED)
{
fprintf(stderr, "Unable to map %s: %s\n", f, strerror(errno));
return 1;
}
size = st.st_size;
usize = xc_dom_check_gzip(image, st.st_size);
if (usize)
{
tmp = malloc(usize);
xc_dom_do_gunzip(image, st.st_size, tmp, usize);
image = tmp;
size = usize;
}
if (0 != elf_init(&elf, image, size))
{
fprintf(stderr, "File %s is not an ELF image\n", f);
return 1;
}
elf_set_logfile(&elf, stderr, 0);
count = elf_phdr_count(&elf);
for ( h=0; h < count; h++)
{
const elf_phdr *phdr;
phdr = elf_phdr_by_index(&elf, h);
if (elf_uval(&elf, phdr, p_type) != PT_NOTE)
continue;
/* Some versions of binutils do not correctly set
* p_offset for note segments.
*/
if (elf_uval(&elf, phdr, p_offset) == 0)
continue;
notes_found = print_notes(&elf,
elf_segment_start(&elf, phdr),
elf_segment_end(&elf, phdr));
}
if ( notes_found == 0 )
{
count = elf_shdr_count(&elf);
for ( h=0; h < count; h++)
{
const elf_shdr *shdr;
shdr = elf_shdr_by_index(&elf, h);
if (elf_uval(&elf, shdr, sh_type) != SHT_NOTE)
continue;
notes_found = print_notes(&elf,
elf_section_start(&elf, shdr),
elf_section_end(&elf, shdr));
if ( notes_found )
fprintf(stderr, "using notes from SHT_NOTE section\n");
}
}
shdr = elf_shdr_by_name(&elf, "__xen_guest");
if (shdr)
printf("__xen_guest: %s\n", (char*)elf_section_start(&elf, shdr));
return 0;
}