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On x86 EFI follows the windows ABI, which expects 8-byte aligned long
long. The x86 sysv ELF ABI expects them to be 8-byte aligned when used
alone, but 4-byte aligned when they appear inside of structs:
struct S {
int i;
long long ll;
};
// _Static_assert(sizeof(struct S) == 12, "x86 sysv ABI");
_Static_assert(sizeof(struct S) == 16, "EFI/MS ABI");
To get the behavior we need when building with sysv ELF ABI we need to
pass '-malign-double' to the compiler as done by EDK2.
This in turn will make ubsan unhappy as the stack may not be properly
aligned on entry, so we have to tell the compiler explicitly to re-align
the stack on entry to efi_main.
This fixes loading EFI drivers on x86 that were previously always
rejected as the EFI_LOADED_IMAGE_PROTOCOL had a wrong memory layout.
See also: https://github.com/rhboot/shim/pull/516
There were a few remaining cases where we used arg_root instead of
the root directory file descriptor. Let's port those over to use the
root directory file descriptor as well.
To make it consistent with other env vars, e.g. $SYSTEMD_ESP_PATH or
$SYSTEMD_XBOOTLDR_PATH.
This is useful when the root is specified by a file descriptor, instead
of a path.
For consistency with other functions.
Unfortunately, va_start() requires that the previous argument is a
pointer, hence the order of the arguments in the internal function
cannot be changed.
The variable 'r' is usually used for storing return value of functional
call. Let's introduce another boolean to store the current loop status.
No functional change, just refactoring.
And make compress_xyz() return 0 on success, as we know which compression
algorithm is used when calling compress_blob().
Follow-up for 2360352ef02548723ac0c8eaf5ff6905eb9eeca5.
In that branch, 'root' is a non-root and absolute path.
Hence, delete_trailing_chars() does not make the path empty.
And, if the path contains redundant slashes at the end, that will be
dropped by path_simplify().
This is a followup to
413e8650b71d4404a7453403797f93d73d88c466
> tree-wide: Use "unmet" for condition checks, not "failed"
Since I noticed when running `systemctl status` on a recent
systemd still seeing
`Condition: start condition failed`
To recap the original rationale here for "unmet" is that it's
normal for some units to be conditional, so the term "failure"
here is too strong.
Unlikely, but even if find_esp() or friends called with unnormalized or
relative 'root', let's make the result path normalized and absolute.
Note, before 63105f33edad423691e2d53bf7071f99c83799ba, these functions
returned an absolute and normalized path. But the commit made the result
path simply concatenated with root.
Follow-up for 63105f33edad423691e2d53bf7071f99c83799ba.
When extension is not specified, image class is not necessary to be
specified. Let's use _IMAGE_CLASS_INVALID as an indicator that no
extension is specified.
