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Add a process spawn syscall and use it to start a proc.

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Also add a skeleton VirtualMemory manager to be used per process.
This commit is contained in:
Drew Galbraith 2023-05-30 20:55:03 -07:00
parent 5bcf1f4e4a
commit 3c3341a90f
7 changed files with 125 additions and 6 deletions
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17
zion/syscall/syscall.cpp
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@ -4,6 +4,9 @@
#include "debug/debug.h"
#include "include/zcall.h"
#include "loader/elf_loader.h"
#include "scheduler/process.h"
#include "scheduler/process_manager.h"
#include "scheduler/scheduler.h"
#define EFER 0xC0000080
@ -53,7 +56,16 @@ void InitSyscall() {
SetMSR(LSTAR, reinterpret_cast<uint64_t>(syscall_enter));
}
extern "C" void SyscallHandler(uint64_t call_id, char* message) {
uint64_t ProcessSpawn(ZProcessSpawnReq* req) {
dbgln("Proc spawn: %u:%u", req->elf_base, req->elf_size);
SharedPtr<Process> proc = MakeShared<Process>();
gProcMan->InsertProcess(proc);
uint64_t entry = LoadElfProgram(proc->cr3(), req->elf_base, req->elf_size);
proc->CreateThread(entry);
return 0;
}
extern "C" uint64_t SyscallHandler(uint64_t call_id, char* message) {
Thread& thread = gScheduler->CurrentThread();
switch (call_id) {
case Z_THREAD_EXIT:
@ -63,7 +75,10 @@ extern "C" void SyscallHandler(uint64_t call_id, char* message) {
case Z_DEBUG_PRINT:
dbgln("[%u.%u] [Debug] %s", thread.pid(), thread.tid(), message);
break;
case Z_PROCESS_SPAWN:
return ProcessSpawn(reinterpret_cast<ZProcessSpawnReq*>(message));
default:
panic("Unhandled syscall number: %u", call_id);
}
return 1;
}