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Start working on memory-mapped files.

First of all, change sys$mmap to take a struct SC_mmap_params since our
sycsall calling convention can't handle more than 3 arguments.

This exposed a bug in Syscall::invoke() needing to use clobber lists.
It was a bit confusing to debug. :^)
This commit is contained in:
Andreas Kling 2018-11-08 11:37:01 +01:00
parent 41a751c90c
commit fdbd9f1e27
14 changed files with 82 additions and 26 deletions

View file

@ -31,7 +31,7 @@ void setgrent()
perror("open /etc/group");
}
assert(__grdb_stream);
__grdb_entry = (struct group_with_strings*)mmap(nullptr, getpagesize());
__grdb_entry = (struct group_with_strings*)mmap(nullptr, getpagesize(), PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
set_mmap_name(__grdb_entry, getpagesize(), "setgrent");
}
}