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[kernel] Add process_create syscall

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New syscall creates a process (and thus a new virtual address space) but
does not create any threads in it.
This commit is contained in:
Justin C. Miller
2021-01-20 18:39:14 -08:00
parent 521df1f4b7
commit 452457412b
4 changed files with 36 additions and 8 deletions
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7
src/drivers/nulldrv/main.cpp
View File

@@ -101,11 +101,16 @@ main(int argc, const char **argv)
_syscall_system_log(message);
_syscall_system_log("main thread waiting on child");
result = _syscall_object_wait(child, -1ull, &out);
if (result != j6_status_ok)
return result;
_syscall_system_log("main thread creating a new process");
j6_handle_t child_proc = j6_handle_invalid;
result = _syscall_process_create(&child_proc);
if (result != j6_status_ok)
return result;
_syscall_system_log("main testing irqs");

8
src/include/syscalls.inc
View File

@@ -8,7 +8,9 @@ SYSCALL(0x09, object_wait, j6_handle_t, j6_signal_t, j6_signal_t *)
SYSCALL(0x0a, object_signal, j6_handle_t, j6_signal_t)
SYSCALL(0x0b, object_close, j6_handle_t)
SYSCALL(0x10, process_exit, int64_t)
SYSCALL(0x10, process_create, j6_handle_t *)
SYSCALL(0x11, process_start, j6_handle_t *, uintptr_t)
SYSCALL(0x17, process_exit, int64_t)
SYSCALL(0x18, thread_create, void *, j6_handle_t *)
SYSCALL(0x19, thread_exit, int64_t)
@@ -26,6 +28,6 @@ SYSCALL(0x2b, endpoint_sendrecv, j6_handle_t, j6_tag_t *, size_t *, void *)
SYSCALL(0x30, vma_create, j6_handle_t *, size_t, uint32_t)
SYSCALL(0x31, vma_create_map, j6_handle_t *, size_t, uintptr_t, uint32_t)
SYSCALL(0x32, vma_map, j6_handle_t, uintptr_t)
SYSCALL(0x33, vma_unmap, j6_handle_t)
SYSCALL(0x32, vma_map, j6_handle_t, j6_handle_t, uintptr_t)
SYSCALL(0x33, vma_unmap, j6_handle_t, j6_handle_t)
SYSCALL(0x34, vma_resize, j6_handle_t, size_t *)

15
src/kernel/syscalls/process.cpp
View File

@@ -3,9 +3,24 @@
#include "log.h"
#include "objects/process.h"
#include "syscalls/helpers.h"
namespace syscalls {
j6_status_t
process_create(j6_handle_t *handle)
{
process *child = construct_handle<process>(handle);
log::debug(logs::syscall, "Process %llx created", child->koid());
return j6_status_ok;
}
j6_status_t
process_start(j6_handle_t *handle, uintptr_t entrypoint)
{
return j6_err_nyi;
}
j6_status_t
process_exit(int64_t status)
{

14
src/kernel/syscalls/vm_area.cpp
View File

@@ -28,22 +28,28 @@ vma_create_map(j6_handle_t *handle, size_t size, uintptr_t base, uint32_t flags)
}
j6_status_t
vma_map(j6_handle_t handle, uintptr_t base)
vma_map(j6_handle_t handle, j6_handle_t proc, uintptr_t base)
{
vm_area *a = get_handle<vm_area>(handle);
if (!a) return j6_err_invalid_arg;
process::current().space().add(base, a);
process *p = get_handle<process>(proc);
if (!p) return j6_err_invalid_arg;
p->space().add(base, a);
return j6_status_ok;
}
j6_status_t
vma_unmap(j6_handle_t handle)
vma_unmap(j6_handle_t handle, j6_handle_t proc)
{
vm_area *a = get_handle<vm_area>(handle);
if (!a) return j6_err_invalid_arg;
process::current().space().remove(a);
process *p = get_handle<process>(proc);
if (!p) return j6_err_invalid_arg;
p->space().remove(a);
return j6_status_ok;
}