[Minios-devel] [UNIKRAFT PATCH 0/3] lib/syscall_shim: Improvements towards musl integration

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

This patch series introduces 3 improvements/fixes to the way how
system calls can be implemented and registered to the system call
shim library:
 1) Introduces low-level variants of UK_SYSCALL_DEFINE and
    UK_SYSCALL_R_DEFINE that allow to implement own libc-style wrappers:
    UK_LLSYSCALL_DEFINE, UK_LLSYSCALL_R_DEFINE. These variants are
    needed whenever the signutare of libc-style wrappers does not match
    with the underlying Linux system call signature.
 2) Introduces an option to disable generating libc-style wrappers.
    This is needed whenever a libC library is providing own wrappers
    and bases its implementations to lib/syscall_shim (e.g., musl).
 3) UK_SYSCALL_R_DEFINE and UK_LLSYSCALL_R_DEFINE do no longer set the
    return type just to long. They use the user-given return type instead.
    This is done for convenience reasons because it reduces
    typecasting of return values on raw system call implementations.

Simon Kuenzer (3):
  lib/syscall_shim: UK_LLSYSCALL_(R_)_DEFINE variants
  lib/syscall_shim: Option to disable libc-style wrapper functions
  lib/syscall_shim: `UK_(LL)SYSCALL_R_DEFINE()`: Use given return type

 doc/guides/developers-app.rst         |  55 +++++++++--
 lib/syscall_shim/Config.uk            |   6 ++
 lib/syscall_shim/include/uk/syscall.h | 137 +++++++++++++++++++++-----
 3 files changed, 163 insertions(+), 35 deletions(-)

-- 
2.20.1


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