Gabriel Schine
53 linhas
1.9 KiB
Markdown
53 linhas
1.9 KiB
Markdown
# Process
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## NAME
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process - Process abstraction
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## SYNOPSIS
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A magenta process is an instance of a program in the traditional
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sense: a set of instructions which will be executed by one or more
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threads, along with a collection of resources.
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## DESCRIPTION
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The process object is a container of the following resources:
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+ [Handles](../handles.md)
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+ [Virtual Memory Address Regions](vm_address_region.md)
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+ [Threads](thread.md)
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In general, it is associated with code which it is executing until it is
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forcefully terminated or the program exits.
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Processes are owned by [jobs](job.md) and allow an application that is
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composed by more than one process to be treated as a single entity, from the
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perspective of resource and permission limits, as well as lifetime control.
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### Lifetime
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A process is created via `sys_process_create()` which take no parameters.
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The process starts destruction when main thread terminates or the last handle
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is closed. [⚠ not implemented].
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Next, the main binary is loaded into the process via `sys_process_load()` and
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its execution begins with `sys_process_start()`.
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## SYSCALLS
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+ [process_create](../syscalls/process_create.md) - create a new process within a job
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+ [process_read_memory](../syscalls/process_read_memory.md) - read from a process's address space
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+ [process_start](../syscalls/process_start.md) - cause a new process to start executing
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+ [process_write_memory](../syscalls/process_write_memory.md) - write to a process's address space
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+ [process_exit](../syscalls/process_exit.md) - exit the current process
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<br>
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+ [job_create](../syscalls/job_create.md) - create a new job within a parent job
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<br>
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+ [vmar_map](../syscalls/vmar_map.md) - Map memory into an address space range
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+ [vmar_protect](../syscalls/vmar_protect.md) - Change permissions on an address space range
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+ [vmar_unmap](../syscalls/vmar_unmap.md) - Unmap memory from an address space range
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