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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-02-02 17:33:19 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-02-03 15:22:37 +0000 |
| commit | 757b435aaabe5e76fc8c85f767061c70a98c0218 (patch) | |
| tree | e1643fb64a908e081762ea6094258eeee8cd5ea7 /arch/arm64/Kconfig.debug | |
| parent | 965861d66fad6ce07bd5c5ecbe6514bc50b8fc11 (diff) | |
| download | lwn-757b435aaabe5e76fc8c85f767061c70a98c0218.tar.gz lwn-757b435aaabe5e76fc8c85f767061c70a98c0218.zip | |
efi: arm64: Add vmlinux debug link to the Image binary
When building with debugging symbols, take the absolute path to the
vmlinux binary and add it to the special PE/COFF debug table entry.
This allows a debug EFI build to find the vmlinux binary, which is
very helpful in debugging, given that the offset where the Image is
first loaded by EFI is highly unpredictable.
On implementations of UEFI that choose to implement it, this
information is exposed via the EFI debug support table, which is a UEFI
configuration table that is accessible both by the firmware at boot time
and by the OS at runtime, and lists all PE/COFF images loaded by the
system.
The format of the NB10 Codeview entry is based on the definition used
by EDK2, which is our primary reference when it comes to the use of
PE/COFF in the context of UEFI firmware.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[will: use realpath instead of shell invocation, as discussed on list]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig.debug')
| -rw-r--r-- | arch/arm64/Kconfig.debug | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug index d1ebd46872fd..f7f38b1aab14 100644 --- a/arch/arm64/Kconfig.debug +++ b/arch/arm64/Kconfig.debug @@ -95,6 +95,14 @@ config DEBUG_ALIGN_RODATA If in doubt, say N. +config DEBUG_EFI + depends on EFI && DEBUG_INFO + bool "UEFI debugging" + help + Enable this option to include EFI specific debugging features into + the kernel that are only useful when using a debug build of the + UEFI firmware + source "drivers/hwtracing/coresight/Kconfig" endmenu |