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/* Copyright 2019 SiFive Inc. */
/* SPDX-License-Identifier: Apache-2.0 */
#include <metal/init.h>
/*
* These function pointers are created by the linker script
* in the .init_array section. The arrays defined by these
* and end points are the set of functions defined by instances
* of METAL_CONSTRUCTOR() and METAL_DESTRUCTOR().
*/
extern metal_constructor_t metal_constructors_start;
extern metal_constructor_t metal_constructors_end;
extern metal_destructor_t metal_destructors_start;
extern metal_destructor_t metal_destructors_end;
void metal_init(void) {
/* Make sure the constructors only run once */
static int init_done = 0;
if (init_done) {
return;
}
init_done = 1;
if (&metal_constructors_end <= &metal_constructors_start) {
return;
}
metal_constructor_t *funcptr = &metal_constructors_start;
while (funcptr != &metal_constructors_end) {
metal_constructor_t func = *funcptr;
func();
funcptr += 1;
}
}
void metal_fini(void) {
/* Make sure the destructors only run once */
static int fini_done = 0;
if (fini_done) {
return;
}
fini_done = 1;
if (&metal_destructors_end <= &metal_destructors_start) {
return;
}
metal_destructor_t *funcptr = &metal_destructors_start;
while (funcptr != &metal_destructors_end) {
metal_destructor_t func = *funcptr;
func();
funcptr += 1;
}
}
/*
* metal_init_run() and metal_fini_run() are marked weak so that users
* can redefine them for their own purposes, including to no-ops
* in the case that users don't want the metal constructors or
* destructors to run.
*/
void metal_init_run(void) __attribute__((weak));
void metal_init_run(void) { metal_init(); }
void metal_fini_run(void) __attribute__((weak));
void metal_fini_run(void) { metal_fini(); }
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