Module signal 

Linux RISC-V 64 signal syscalls and signal handling

Implements POSIX signals with Linux-compatible semantics, integrated with Scarlet’s event system for cross-ABI signal delivery.

Structs

SignalMask

Signal mask for blocking signals

SignalState

Signal handler state for a task

Enums

LinuxSignal

Linux signal numbers (POSIX standard)

SignalAction

Signal action types

Functions

deliver_signal_to_task

Deliver a signal to a task’s signal state

get_next_pending_signal

Check if task has pending signals and return the next one to handle

handle_event_to_signal

Handle incoming event and convert to signal if needed

handle_fatal_signal_immediately

Handle fatal signals that should terminate immediately This is a simplified implementation for basic signal handling

is_fatal_signal

Check if a signal should be handled immediately (cannot be blocked/ignored)

process_control_to_signal

Convert Scarlet ProcessControlType to Linux signal

process_pending_signals_with_state

Process pending signals for a task with explicit signal state Returns true if a signal was handled and execution should be interrupted

setup_signal_handler 🔒

Enhanced signal handler setup with proper context saving

sys_rt_sigaction

Linux rt_sigaction system call implementation

sys_rt_sigprocmask

Linux rt_sigprocmask system call implementation

sys_tkill

Linux sys_tkill - Send a signal to a specific thread