efi-boot-shim.git/include/compiler.h, branch rolling

compiler.h: minor ALIGN_... fixes

2025-02-24T20:22:28+00:00

This fixes some minor errors with the testing of how ALIGN() and similar are defined, and makes an explicit "ALIGN_UP()" macro to complement the existing ALIGN_DOWN() macro. Signed-off-by: Peter Jones

includes: work around CLANG_PREREQ() double-definition

2024-12-17T18:35:41+00:00

Right now when doing test builds with clang, we wind up getting an error from two different definitions of CLANG_PREREQ() in the headers. It might be that we can just rip one of these out, but for now I'm just making one of them conditional. Signed-off-by: Peter Jones

pe-relocate: Avoid __builtin_add_overflow() on GCC < 5

2024-01-22T19:17:20+00:00

GCC 4 doesn't have __builtin_add_overflow() and friends, so this results in a compiler error. On platforms using that version, do the arithmetic without it. Signed-off-by: Peter Jones

Add primitives for overflow-checked arithmetic operations.

2023-12-05T18:17:19+00:00

We need to do arithmetic on untrusted values sometimes, so this patch adds the following primitives as macros that wrap the compiler builtins. bool checked_add(TYPE addend0, TYPE addend1, TYPE *sum) bool checked_sub(TYPE minuend, TYPE subtrahend, TYPE *difference) bool checked_mul(TYPE factor0, TYPE factor1, TYPE *product) And also the following primitive which returns True if divisor is 0 and False otherwise: bool checked_div(TYPE dividend, TYPE divisor, TYPE *quotient) Signed-off-by: Peter Jones

shim: Flush the memory region from i-cache before execution

2022-10-04T17:53:11+00:00

We've seen crashes in early GRUB code on an ARM Cortex-A72-based platform that point at seemingly harmless instructions. Flushing the i-cache of those instructions prior to executing has been shown to avoid the problem, which has parallels with this story: https://www.mail-archive.com/osv-dev@googlegroups.com/msg06203.html Add a cache flushing utility function and provide an implementation using a GCC intrinsic. This will need to be extended to support other compilers. Note that this intrinsic is a no-op for x86 platforms. This fixes issue #498. Signed-off-by: dann frazier

Give the Coverity scanner some more GCC blinders...

2022-05-23T20:49:53+00:00

Coverity complains: CID 373676 (#3 of 3): Unrecoverable parse warning (PARSE_ERROR) 1. arguments_provided_for_attribute: attribute "__malloc__" does not take arguments This is, of course, just plain wrong. Even so, I'm tired of looking at it, so this patch wraps the #define we use for that attribute in a check to see if it's being built by Coverity. Signed-off-by: Peter Jones

Fix compilation for older gcc

2021-03-10T21:41:32+00:00

Signed-off-by: Alex Burmashev

Consolidate most of our standard lib functions to lib

2021-03-10T20:54:20+00:00

Signed-off-by: Peter Jones

compiler.h: fix a typo and add some more function attribute macros

2021-02-25T15:15:14+00:00

This fixes the ifndef guard on NONNULL and __CONCAT3 and adds definitions for: - __CONCAT() for a##b with the intermediate tokenization step - ALLOCFUNC for __malloc__ - DEPRECATED for __deprecated__ - PURE for __pure__ - RETURNS_NONNULL for __nonnull__ Signed-off-by: Peter Jones

Make sure MIN() and MAX() are always defined.

2021-02-16T08:12:48+00:00

Signed-off-by: Peter Jones