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

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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>
This commit is contained in:
Liam Merwick 2019-01-15 12:18:03 +00:00 • committed by Paolo Bonzini
parent d455ebc4f8
commit 4366e1db16
41 changed files with 113 additions and 70 deletions
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7
hw/microblaze/boot.c
View file

@ -142,13 +142,14 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
#endif
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&entry, &low, &high,
big_endian, EM_MICROBLAZE, 0, 0);
base32 = entry;
if (base32 == 0xc0000000) {
kernel_size = load_elf(kernel_filename, translate_kernel_address,
NULL, &entry, NULL, NULL,
kernel_size = load_elf(kernel_filename, NULL,
translate_kernel_address, NULL,
&entry, NULL, NULL,
big_endian, EM_MICROBLAZE, 0, 0);
}
/* Always boot into physical ram. */