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https://github.com/RGBCube/serenity
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Lots of hacking:
- Turn Keyboard into a CharacterDevice (85,1) at /dev/keyboard. - Implement MM::unmapRegionsForTask() and MM::unmapRegion() - Save SS correctly on interrupt. - Add a simple Spawn syscall for launching another process. - Move a bunch of IO syscall debug output behind DEBUG_IO. - Have ASSERT do a "cli" immediately when failing. This makes the output look proper every time. - Implement a bunch of syscalls in LibC. - Add a simple shell ("sh"). All it can do now is read a line of text from /dev/keyboard and then try launching the specified executable by calling spawn(). There are definitely bugs in here, but we're moving on forward.
This commit is contained in:
parent
72514c8b97
commit
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29 changed files with 276 additions and 32 deletions
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@ -1,6 +1,8 @@
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OBJS = \
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stdio.o \
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unistd.o \
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string.o \
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process.o \
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entry.o
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LIBRARY = LibC.a
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12
LibC/process.cpp
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12
LibC/process.cpp
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#include "process.h"
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#include <Kernel/Syscall.h>
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extern "C" {
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int spawn(const char* path)
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{
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return Syscall::invoke(Syscall::Spawn, (dword)path);
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}
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}
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8
LibC/process.h
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8
LibC/process.h
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#pragma once
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extern "C" {
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int spawn(const char* path);
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}
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@ -141,7 +141,8 @@ extern "C" {
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int putchar(int ch)
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{
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return ch;
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Syscall::invoke(Syscall::PutCharacter, ch);
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return (byte)ch;
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}
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int printf(const char* fmt, ...)
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14
LibC/string.cpp
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14
LibC/string.cpp
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@ -0,0 +1,14 @@
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#include "string.h"
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extern "C" {
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size_t strlen(const char* str)
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{
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size_t len = 0;
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while (*(str++))
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++len;
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return len;
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}
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}
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10
LibC/string.h
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10
LibC/string.h
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@ -0,0 +1,10 @@
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#pragma once
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#include "types.h"
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extern "C" {
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size_t strlen(const char*);
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}
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@ -6,9 +6,16 @@ typedef unsigned int dword;
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typedef unsigned short word;
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typedef unsigned char byte;
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typedef signed int signed_dword;
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typedef signed short signed_word;
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typedef signed char signed_byte;
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typedef dword uid_t;
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typedef dword gid_t;
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typedef dword pid_t;
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typedef dword size_t;
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typedef signed_dword ssize_t;
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}
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@ -1,4 +1,5 @@
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#include "unistd.h"
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#include "string.h"
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#include <Kernel/Syscall.h>
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extern "C" {
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return Syscall::invoke(Syscall::PosixGetpid);
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}
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int open(const char* path)
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{
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size_t length = strlen(path);
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return Syscall::invoke(Syscall::PosixOpen, (dword)path, (dword)length);
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}
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ssize_t read(int fd, void* buf, size_t count)
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{
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return Syscall::invoke(Syscall::PosixRead, (dword)fd, (dword)buf, (dword)count);
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}
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int close(int fd)
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{
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return Syscall::invoke(Syscall::PosixClose, fd);
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}
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}
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@ -7,6 +7,9 @@ extern "C" {
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uid_t getuid();
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gid_t getgid();
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pid_t getpid();
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int open(const char* path);
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ssize_t read(int fd, void* buf, size_t count);
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int close(int fd);
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}
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