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misc: arch: streamline #[source] and Error

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This streamlines the code base to follow best practices for
error handling in Rust: Each error struct implements
std::error::Error (most due via thiserror::Error derive macro)
and sets its source accordingly.

This allows future work that nicely prints the error chains,
for example.

So far, the convention is that each error prints its
sub error as part of its Display::fmt() impl.

Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com
This commit is contained in:
Philipp Schuster
2025-05-19 09:46:53 +02:00
committed by Rob Bradford
parent 06f3049d24
commit 5db92f79bf
1 changed files with 4 additions and 4 deletions
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8
arch/src/lib.rs
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@@ -28,14 +28,14 @@ type GuestRegionMmap = vm_memory::GuestRegionMmap<vm_memory::bitmap::AtomicBitma
#[derive(Debug, Error)]
pub enum Error {
#[cfg(target_arch = "x86_64")]
#[error("Platform specific error (x86_64): {0:?}")]
PlatformSpecific(x86_64::Error),
#[error("Platform specific error (x86_64): {0}")]
PlatformSpecific(#[source] x86_64::Error),
#[cfg(target_arch = "aarch64")]
#[error("Platform specific error (aarch64): {0:?}")]
PlatformSpecific(aarch64::Error),
PlatformSpecific(#[source] aarch64::Error),
#[cfg(target_arch = "riscv64")]
#[error("Platform specific error (riscv64): {0:?}")]
PlatformSpecific(riscv64::Error),
PlatformSpecific(#[source] riscv64::Error),
#[error("The memory map table extends past the end of guest memory")]
MemmapTablePastRamEnd,
#[error("Error writing memory map table to guest memory")]