1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <inttypes.h> 4 #include <stdio.h> 5 #include <string.h> 6 #include "debug.h" 7 #include "symbol.h" 8 #include "callchain.h" 9 #include "record.h" 10 11 /* On arm64, kernel text segment starts at high memory address, 12 * for example 0xffff 0000 8xxx xxxx. Modules start at a low memory 13 * address, like 0xffff 0000 00ax xxxx. When only small amount of 14 * memory is used by modules, gap between end of module's text segment 15 * and start of kernel text segment may reach 2G. 16 * Therefore do not fill this gap and do not assign it to the kernel dso map. 17 */ 18 19 #define SYMBOL_LIMIT (1 << 12) /* 4K */ 20 21 void arch__symbols__fixup_end(struct symbol *p, struct symbol *c) 22 { 23 if ((strchr(p->name, '[') && strchr(c->name, '[') == NULL) || 24 (strchr(p->name, '[') == NULL && strchr(c->name, '['))) 25 /* Limit range of last symbol in module and kernel */ 26 p->end += SYMBOL_LIMIT; 27 else 28 p->end = c->start; 29 pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end); 30 } 31 32 void arch__add_leaf_frame_record_opts(struct record_opts *opts) 33 { 34 opts->sample_user_regs |= sample_reg_masks[PERF_REG_ARM64_LR].mask; 35 } 36