2  * Copyright (c) 2013-2019, Intel Corporation
33 #include "intel-pt.h"
36 /* A psb packet contains a unique 2-byte repeating pattern.
59 	return truncate(pointer + alignment - 1, alignment);  in align()
68 				  const struct pt_config *config)  in pt_find_psb()  argument
73 	if (!pos || !config)  in pt_find_psb()
76 	begin = config->begin;  in pt_find_psb()
77 	end = config->end;  in pt_find_psb()
100 	 * We're right after the psb payload and within the buffer.  in pt_find_psb()
103 	pos -= ptps_psb;  in pt_find_psb()
105 	/* Check if we're still inside the buffer. */  in pt_find_psb()
109 	/* Check that this is indeed a psb packet we're at. */  in pt_find_psb()
113 	errcode = pt_pkt_read_psb(pos, config);  in pt_find_psb()
125 	 * This will result in -pte_eos when we actually try to read from @pos.  in pt_sync_within_bounds()
131 		const struct pt_config *config)  in pt_sync_set()  argument
136 	if (!sync || !pos || !config)  in pt_sync_set()
137 		return -pte_internal;  in pt_sync_set()
139 	begin = config->begin;  in pt_sync_set()
140 	end = config->end;  in pt_sync_set()
143 		return -pte_eos;  in pt_sync_set()
146 		return -pte_eos;  in pt_sync_set()
148 	/* Check that this is indeed a psb packet we're at. */  in pt_sync_set()
150 		return -pte_nosync;  in pt_sync_set()
152 	errcode = pt_pkt_read_psb(pos, config);  in pt_sync_set()
162 		    const struct pt_config *config)  in pt_sync_forward()  argument
166 	if (!sync || !pos || !config)  in pt_sync_forward()
167 		return -pte_internal;  in pt_sync_forward()
170 	begin = config->begin;  in pt_sync_forward()
171 	end = config->end;  in pt_sync_forward()
174 		return -pte_internal;  in pt_sync_forward()
186 			return -pte_eos;  in pt_sync_forward()
194 		current = pt_find_psb(pos, config);  in pt_sync_forward()
210 		    const struct pt_config *config)  in pt_sync_backward()  argument
214 	if (!sync || !pos || !config)  in pt_sync_backward()
215 		return -pte_internal;  in pt_sync_backward()
217 	begin = config->begin;  in pt_sync_backward()
218 	end = config->end;  in pt_sync_backward()
221 		return -pte_internal;  in pt_sync_backward()
231 		pos -= sizeof(uint64_t);  in pt_sync_backward()
233 			return -pte_eos;  in pt_sync_backward()
241 		next = pt_find_psb(next, config);  in pt_sync_backward()