forked from haiwan/sledge
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.4 KiB
56 lines
1.4 KiB
#pragma once
|
|
|
|
#include <assert.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <ucontext.h>
|
|
#include <unistd.h>
|
|
|
|
#include "software_interrupt.h"
|
|
|
|
/*
|
|
* This file contains the common dependencies of the architecture-dependent code.
|
|
*
|
|
* While all of the content in this file could alternatively be placed in context.h
|
|
* above the conditional preprocessor includes, IDEs generally assume each file includes
|
|
* their own dependent headers directly and form a clean independent subtree that
|
|
* can be walked to resolve all symbols when the file is active
|
|
*/
|
|
|
|
typedef uint64_t reg_t;
|
|
|
|
/* Register context saved and restored on user-level, direct context switches. */
|
|
typedef enum
|
|
{
|
|
ureg_rsp = 0,
|
|
ureg_rip = 1,
|
|
ureg_count
|
|
} ureg_t;
|
|
|
|
/* The enum is compared directly in assembly, so maintain integral values! */
|
|
typedef enum
|
|
{
|
|
arch_context_unused = 0,
|
|
arch_context_fast = 1,
|
|
arch_context_slow = 2,
|
|
arch_context_running = 3
|
|
} arch_context_t;
|
|
|
|
|
|
struct arch_context {
|
|
arch_context_t variant;
|
|
reg_t regs[ureg_count];
|
|
mcontext_t mctx;
|
|
};
|
|
|
|
/*
|
|
* This is the slowpath switch to a preempted sandbox!
|
|
* SIGUSR1 on the current thread and restore mcontext there!
|
|
*/
|
|
extern __thread struct arch_context worker_thread_base_context;
|
|
|
|
/* Cannot be inlined because called in assembly */
|
|
void __attribute__((noinline)) __attribute__((noreturn)) arch_context_restore_preempted(void);
|
|
|
|
extern __thread volatile bool worker_thread_is_switching_context;
|