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Add getgid() and getpid() syscalls. Prep for LibC.

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This commit is contained in:
Andreas Kling 2018-10-22 13:55:11 +02:00
parent bae59609e3
commit 85bcf2ed0f
Notes: sideshowbarker 2024-07-19 18:45:18 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/85bcf2ed0f0
5 changed files with 34 additions and 13 deletions
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2
AK/Types.h
View file

@ -1,6 +1,6 @@
#pragma once
#ifdef SERENITY_KERNEL
#if defined(SERENITY_KERNEL) || defined(SERENITY_LIBC)
typedef unsigned char byte;
typedef unsigned short word;
typedef unsigned int dword;

4
Kernel/Syscall.cpp
View file

@ -77,6 +77,10 @@ DWORD handle(DWORD function, DWORD arg1, DWORD arg2, DWORD arg3)
return current->sys$kill((pid_t)arg1, (int)arg2);
case Syscall::PosixGetuid:
return current->sys$getuid();
case Syscall::PosixGetgid:
return current->sys$getgid();
case Syscall::PosixGetpid:
return current->sys$getpid();
case Syscall::PosixExit:
current->sys$exit((int)arg1);
ASSERT_NOT_REACHED();

28
Kernel/Syscall.h
View file

@ -1,9 +1,11 @@
#pragma once
#define DO_SYSCALL_A0(function) Syscall::invoke((DWORD)(function))
#define DO_SYSCALL_A1(function, arg1) Syscall::invoke((DWORD)(function), (DWORD)(arg1))
#define DO_SYSCALL_A2(function, arg1, arg2) Syscall::invoke((DWORD)(function), (DWORD)(arg1), (DWORD)(arg2))
#define DO_SYSCALL_A3(function, arg1, arg2, arg3) Syscall::invoke((DWORD)(function), (DWORD)(arg1), (DWORD)(arg2), (DWORD)arg3)
#include <AK/Types.h>
#define DO_SYSCALL_A0(function) Syscall::invoke((dword)(function))
#define DO_SYSCALL_A1(function, arg1) Syscall::invoke((dword)(function), (dword)(arg1))
#define DO_SYSCALL_A2(function, arg1, arg2) Syscall::invoke((dword)(function), (dword)(arg1), (dword)(arg2))
#define DO_SYSCALL_A3(function, arg1, arg2, arg3) Syscall::invoke((dword)(function), (dword)(arg1), (dword)(arg2), (dword)arg3)
namespace Syscall {
@ -18,34 +20,36 @@ enum Function {
PosixKill = 0x1989,
PosixGetuid = 0x1990,
PosixExit = 0x1991,
PosixGetgid = 0x1992,
PosixGetpid = 0x1993,
};
void initialize();
inline DWORD invoke(DWORD function)
inline dword invoke(dword function)
{
DWORD result;
dword result;
asm volatile("int $0x80":"=a"(result):"a"(function));
return result;
}
inline DWORD invoke(DWORD function, DWORD arg1)
inline dword invoke(dword function, dword arg1)
{
DWORD result;
dword result;
asm volatile("int $0x80":"=a"(result):"a"(function),"d"(arg1));
return result;
}
inline DWORD invoke(DWORD function, DWORD arg1, DWORD arg2)
inline dword invoke(dword function, dword arg1, dword arg2)
{
DWORD result;
dword result;
asm volatile("int $0x80":"=a"(result):"a"(function),"d"(arg1),"c"(arg2));
return result;
}
inline DWORD invoke(DWORD function, DWORD arg1, DWORD arg2, DWORD arg3)
inline dword invoke(dword function, dword arg1, dword arg2, dword arg3)
{
DWORD result;
dword result;
asm volatile("int $0x80":"=a"(result):"a"(function),"d"(arg1),"c"(arg2),"b"(arg3));
return result;
}

10
Kernel/Task.cpp
View file

@ -551,6 +551,16 @@ uid_t Task::sys$getuid()
return m_uid;
}
gid_t Task::sys$getgid()
{
return m_gid;
}
pid_t Task::sys$getpid()
{
return m_pid;
}
bool Task::acceptsMessageFrom(Task& peer)
{
return !ipc.msg.isValid() && (ipc.src == IPC::Handle::Any || ipc.src == peer.handle());

3
Kernel/Task.h
View file

@ -77,6 +77,8 @@ public:
void setState(State s) { m_state = s; }
uid_t sys$getuid();
gid_t sys$getgid();
pid_t sys$getpid();
int sys$open(const char* path, size_t pathLength);
int sys$close(int fd);
int sys$read(int fd, void* outbuf, size_t nread);
@ -118,6 +120,7 @@ private:
void (*m_entry)() { nullptr };
pid_t m_pid { 0 };
uid_t m_uid { 0 };
gid_t m_gid { 0 };
DWORD m_ticks { 0 };
DWORD m_ticksLeft { 0 };
IPC::Handle m_handle { 0 };