elf: Add optional function ptr to load_elf() to parse ELF notes

This patch adds an optional function pointer, 'elf_note_fn', to
load_elf() which causes load_elf() to additionally parse any
ELF program headers of type PT_NOTE and check to see if the ELF
Note is of the type specified by the 'translate_opaque' arg.
If a matching ELF Note is found then the specfied function pointer
is called to process the ELF note.

Passing a NULL function pointer results in ELF Notes being skipped.

The first consumer of this functionality is the PVHboot support
which needs to read the XEN_ELFNOTE_PHYS32_ENTRY ELF Note while
loading the uncompressed kernel binary in order to discover the
boot entry address for the x86/HVM direct boot ABI.

Signed-off-by: Liam Merwick <liam.merwick@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index ac6dd7f6ab..d1b1d3caa4 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -135,8 +135,8 @@ static void machine_hppa_init(MachineState *machine)
         exit(1);
     }
 
-    size = load_elf(firmware_filename, NULL,
-                    NULL, &firmware_entry, &firmware_low, &firmware_high,
+    size = load_elf(firmware_filename, NULL, NULL, NULL,
+                    &firmware_entry, &firmware_low, &firmware_high,
                     true, EM_PARISC, 0, 0);
 
     /* Unfortunately, load_elf sign-extends reading elf32.  */
@@ -165,7 +165,7 @@ static void machine_hppa_init(MachineState *machine)
 
     /* Load kernel */
     if (kernel_filename) {
-        size = load_elf(kernel_filename, &cpu_hppa_to_phys,
+        size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys,
                         NULL, &kernel_entry, &kernel_low, &kernel_high,
                         true, EM_PARISC, 0, 0);