dev/kinst/trampoline.c

75 	struct trampchunk *chunk;
93 	 * Allocate virtual memory for the trampoline chunk. The returned
101 		KINST_LOG("trampoline chunk allocation failed: %d", error);
111 	/* Allocate a tracker for this chunk. */
112 	chunk = malloc(sizeof(*chunk), M_KINST, M_WAITOK);
113 	chunk->addr = (void *)trampaddr;
114 	BIT_FILL(KINST_TRAMPS_PER_CHUNK, &chunk->free);
116 	TAILQ_INSERT_HEAD(&kinst_trampchunks, chunk, next);
118 	return (chunk);
122 kinst_trampchunk_free(struct trampchunk *chunk)
126 	TAILQ_REMOVE(&kinst_trampchunks, chunk, next);
127 	kmem_unback(kernel_object, (vm_offset_t)chunk->addr,
129 	(void)vm_map_remove(kernel_map, (vm_offset_t)chunk->addr,
130 	    (vm_offset_t)(chunk->addr + KINST_TRAMPCHUNK_SIZE));
131 	free(chunk, M_KINST);
137 	struct trampchunk *chunk;
143 	TAILQ_FOREACH(chunk, &kinst_trampchunks, next) {
144 		/* All trampolines from this chunk are already allocated. */
145 		if ((off = BIT_FFS(KINST_TRAMPS_PER_CHUNK, &chunk->free)) == 0)
151 	if (chunk == NULL) {
155 		if ((chunk = kinst_trampchunk_alloc()) == NULL) {
176 	BIT_CLR(KINST_TRAMPS_PER_CHUNK, off, &chunk->free);
177 	tramp = chunk->addr + off * KINST_TRAMP_SIZE;
195 	struct trampchunk *chunk;
203 	TAILQ_FOREACH(chunk, &kinst_trampchunks, next) {
205 			if (chunk->addr + off * KINST_TRAMP_SIZE == tramp) {
208 				    &chunk->free);
211 				    &chunk->free))
212 					kinst_trampchunk_free(chunk);
217 	panic("%s: did not find trampoline chunk for %p", __func__, tramp);
322 	struct trampchunk *chunk, *tmp;
341 	TAILQ_FOREACH_SAFE(chunk, &kinst_trampchunks, next, tmp)
342 		kinst_trampchunk_free(chunk);
345 	struct trampchunk *chunk, *tmp;
348 	TAILQ_FOREACH_SAFE(chunk, &kinst_trampchunks, next, tmp)
349 		kinst_trampchunk_free(chunk);