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fix(shim): repair x86_64 shim verification by using the SYSV calling convention

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Alex Zenla
2025-11-02 05:57:24 -05:00
parent cc37c2b26a
commit f0628f77e2
1 changed files with 7 additions and 0 deletions
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7
src/integrations/shim.rs
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@@ -134,6 +134,13 @@ pub enum ShimVerificationOutput {
#[unsafe_protocol(ShimSupport::SHIM_LOCK_GUID)]
struct ShimLockProtocol {
/// Verify the data in `buffer` with the size `buffer_size` to determine if it is valid.
/// NOTE: On x86_64, this function uses SYSV calling conventions. On aarch64 it uses the
/// efiapi calling convention. This is truly wild, but you can verify it yourself by
/// looking at: https://github.com/rhboot/shim/blob/15.8/shim.h#L207-L212
/// There is no calling convention declared like there should be.
#[cfg(target_arch = "x86_64")]
pub shim_verify: unsafe extern "sysv64" fn(buffer: *const c_void, buffer_size: u32) -> Status,
#[cfg(target_arch = "aarch64")]
pub shim_verify: unsafe extern "efiapi" fn(buffer: *const c_void, buffer_size: u32) -> Status,
/// Unused function that is defined by the shim.
_generate_header: *mut c_void,