munmap and sceKernelMunmap over a range in which no page is mapped
failed: munmap returned EINVAL and sceKernelMunmap let the registry's
exception escape. Both now return 0. The console returns 0 for
sceKernelMunmap of a range it just unmapped and of a never-mapped
address, and EINVAL only for a zero length, as measured by prosper's
console oracle (kernelx.golden.tsv, kx_fmem_unmap_again,
kx_fmem_munmap_unmapped).
The other half of #3196, a range with an unmapped page in the middle, is
already fixed on main by 04ed61957; the test covers both.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
9d96752fcd