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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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3
Kernel/Process.h
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@ -9,6 +9,7 @@
#include <VirtualFileSystem/VirtualFileSystem.h>
#include <VirtualFileSystem/UnixTypes.h>
#include "TTY.h"
#include "Syscall.h"
class FileDescriptor;
class PageDirectory;
@ -132,7 +133,7 @@ public:
void sys$sigreturn() NORETURN;
pid_t sys$spawn(const char* path, const char** args, const char** envp);
pid_t sys$waitpid(pid_t, int* wstatus, int options);
void* sys$mmap(void*, size_t size);
void* sys$mmap(const Syscall::SC_mmap_params*);
int sys$munmap(void*, size_t size);
int sys$set_mmap_name(void*, size_t, const char*);
int sys$get_dir_entries(int fd, void*, size_t);