Refactor - Improve syscall errors

[codecov-commenter]

Codecov Report

Merging #536 (4422db1) into main (ae16614) will decrease coverage by 1.14%. The diff coverage is 75.55%.

@@            Coverage Diff             @@
##             main     #536      +/-   ##
==========================================
- Coverage   89.55%   88.41%   -1.14%     
==========================================
  Files          24       24              
  Lines       10094    10258     +164     
==========================================
+ Hits         9040     9070      +30     
- Misses       1054     1188     +134     

Files	Coverage Δ
src/elf.rs	87.57% <ø> (ø)
src/interpreter.rs	98.81% <ø> (ø)
src/jit.rs	91.49% <ø> (ø)
src/memory_region.rs	94.10% <ø> (ø)
src/program.rs	82.97% <100.00%> (+2.39%)	:arrow_up:
src/vm.rs	83.97% <ø> (-1.93%)	:arrow_down:
src/syscalls.rs	22.01% <16.66%> (-77.99%)	:arrow_down:
src/error.rs	67.92% <67.30%> (-32.08%)	:arrow_down: