8 Jan
2019
8 Jan
'19
11:30 a.m.
On 1/8/19 9:25 PM, Will Deacon wrote:
An mmap/mprotect flag?
I'm not aware of any precedent for arch-specific mmap/mprotect flags, but it looks like PowerPC adds its own PROT bit for "Strong Access Ordering" so something similar might be do-able for GP on arm64.
However, if we anticipate that pages are either GP or !GP for the lifetime of the mapping, I think your suggestions below relating to encoding this in the ELF make more sense.
Even if the main usage is via ELF, you need the flag for ld.so to use when mmap'ing the file.
r~