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Start working on memory-mapped files.

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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
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10
LibC/mman.cpp
View file

@ -1,12 +1,14 @@
#include "mman.h"
#include "errno.h"
#include <mman.h>
#include <errno.h>
#include <stdio.h>
#include <Kernel/Syscall.h>
extern "C" {
void* mmap(void* addr, size_t size)
void* mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset)
{
int rc = Syscall::invoke(Syscall::SC_mmap, (dword)addr, (dword)size);
Syscall::SC_mmap_params params { (dword)addr, size, prot, flags, fd, offset };
int rc = Syscall::invoke(Syscall::SC_mmap, (dword)&params);
__RETURN_WITH_ERRNO(rc, (void*)rc, (void*)-1);
}