mirror of
https://github.com/RGBCube/serenity
synced 2025-05-31 11:38:11 +00:00
8accc92c3c
This is quite cool! The syscall entry point plumbs the register dump down to sys$fork(), which uses it to set up the child process's TSS in order to resume execution right after the int 0x80 fork() call. :^) This works pretty well, although there is some problem with the kernel alias mappings used to clone the parent process's regions. If I disable the MM::release_page_directory() code, there's no problem. Probably there's a premature freeing of a physical page somehow.
150 lines
3.3 KiB
C++
150 lines
3.3 KiB
C++
#include "unistd.h"
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#include "string.h"
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#include "errno.h"
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#include <Kernel/Syscall.h>
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extern "C" {
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pid_t fork()
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{
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return Syscall::invoke(Syscall::PosixFork);
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}
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uid_t getuid()
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{
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return Syscall::invoke(Syscall::PosixGetuid);
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}
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gid_t getgid()
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{
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return Syscall::invoke(Syscall::PosixGetgid);
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}
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pid_t getpid()
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{
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return Syscall::invoke(Syscall::PosixGetpid);
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}
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pid_t setsid()
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{
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return Syscall::invoke(Syscall::PosixSetsid);
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}
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pid_t tcgetpgrp(int fd)
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{
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return Syscall::invoke(Syscall::PosixTcgetpgrp, (dword)fd);
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}
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int tcsetpgrp(int fd, pid_t pgid)
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{
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return Syscall::invoke(Syscall::PosixTcsetpgrp, (dword)fd, (dword)pgid);
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}
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int setpgid(pid_t pid, pid_t pgid)
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{
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return Syscall::invoke(Syscall::PosixSetpgid, (dword)pid, (dword)pgid);
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}
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pid_t getpgid(pid_t pid)
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{
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return Syscall::invoke(Syscall::PosixGetpgid, (dword)pid);
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}
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pid_t getpgrp()
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{
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return Syscall::invoke(Syscall::PosixGetpgrp);
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}
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int open(const char* path, int options)
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{
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int rc = Syscall::invoke(Syscall::PosixOpen, (dword)path, (dword)options);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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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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int rc = Syscall::invoke(Syscall::PosixRead, (dword)fd, (dword)buf, (dword)count);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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ssize_t write(int fd, const void* buf, size_t count)
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{
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int rc = Syscall::invoke(Syscall::PosixWrite, (dword)fd, (dword)buf, (dword)count);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int ttyname_r(int fd, char* buffer, size_t size)
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{
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int rc = Syscall::invoke(Syscall::PosixTtynameR, (dword)fd, (dword)buffer, (dword)size);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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static char ttyname_buf[32];
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char* ttyname(int fd)
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{
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if (ttyname_r(fd, ttyname_buf, sizeof(ttyname_buf)) < 0)
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return nullptr;
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return ttyname_buf;
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}
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int close(int fd)
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{
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int rc = Syscall::invoke(Syscall::PosixClose, fd);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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pid_t waitpid(pid_t waitee, int* wstatus, int options)
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{
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int rc = Syscall::invoke(Syscall::PosixWaitpid, waitee, (dword)wstatus);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int lstat(const char* path, struct stat* statbuf)
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{
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int rc = Syscall::invoke(Syscall::PosixLstat, (dword)path, (dword)statbuf);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int stat(const char* path, struct stat* statbuf)
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{
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int rc = Syscall::invoke(Syscall::PosixStat, (dword)path, (dword)statbuf);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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int chdir(const char* path)
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{
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int rc = Syscall::invoke(Syscall::PosixChdir, (dword)path);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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char* getcwd(char* buffer, size_t size)
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{
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int rc = Syscall::invoke(Syscall::PosixGetcwd, (dword)buffer, (dword)size);
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__RETURN_WITH_ERRNO(rc, buffer, nullptr);
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}
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int sleep(unsigned seconds)
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{
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return Syscall::invoke(Syscall::Sleep, (dword)seconds);
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}
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int gethostname(char* buffer, size_t size)
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{
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int rc = Syscall::invoke(Syscall::PosixGethostname, (dword)buffer, (dword)size);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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ssize_t readlink(const char* path, char* buffer, size_t size)
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{
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int rc = Syscall::invoke(Syscall::PosixReadlink, (dword)path, (dword)buffer, (dword)size);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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off_t lseek(int fd, off_t offset, int whence)
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{
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int rc = Syscall::invoke(Syscall::PosixLseek, (dword)fd, (dword)offset, (dword)whence);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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}
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