// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2021, The Linux Foundation. All rights reserved. * Copyright (c) 2023, Unisoc (Shanghai) Technologies Co., Ltd */ #include #include #include #include #include #include #include #include #include "../../mm/slab.h" #include struct ads_entry { char *name; void *addr; }; #define _ADS_ENTRY(index, symbol) \ [index] = { .name = #symbol, .addr = (void *)symbol } #define ADS_ENTRY(index, symbol) _ADS_ENTRY(index, symbol) #define _ADS_PER_CPU_ENTRY(index, symbol) \ [index] = { .name = #symbol, .addr = (void *)&symbol } #define ADS_PER_CPU_ENTRY(index, symbol) _ADS_PER_CPU_ENTRY(index, symbol) /* * This module maintains static array of symbol and address information. * Add all required core kernel symbols and their addresses into ads_entries[] array, * so that vendor modules can query and to find address of non-exported symbol. */ static const struct ads_entry ads_entries[ADS_END] = { ADS_ENTRY(ADS_SDATA, _sdata), ADS_ENTRY(ADS_BSS_END, __bss_stop), ADS_ENTRY(ADS_PER_CPU_START, __per_cpu_start), ADS_ENTRY(ADS_PER_CPU_END, __per_cpu_end), ADS_ENTRY(ADS_TEXT, _text), ADS_ENTRY(ADS_SEND, _end), ADS_ENTRY(ADS_LINUX_BANNER, linux_banner), ADS_ENTRY(ADS_TOTAL_CMA, &totalcma_pages), ADS_ENTRY(ADS_SLAB_CACHES, &slab_caches), ADS_ENTRY(ADS_SLAB_MUTEX, &slab_mutex), }; /* * ads_per_cpu_entries array contains all the per_cpu variable address information. */ static const struct ads_entry ads_per_cpu_entries[ADS_DEBUG_PER_CPU_END] = { #ifdef CONFIG_ARM64 ADS_PER_CPU_ENTRY(ADS_IRQ_STACK_PTR, irq_stack_ptr), #endif #ifdef CONFIG_X86 ADS_PER_CPU_ENTRY(ADS_IRQ_STACK_PTR, hardirq_stack_ptr), #endif }; /* * android_debug_symbol - Provide address inforamtion of debug symbol. * @symbol: Index of debug symbol array. * * Return address of core kernel symbol on success and a negative errno will be * returned in error cases. * */ void *android_debug_symbol(enum android_debug_symbol symbol) { if (symbol >= ADS_END) return ERR_PTR(-EINVAL); return ads_entries[symbol].addr; } EXPORT_SYMBOL_NS_GPL(android_debug_symbol, MINIDUMP); /* * android_debug_per_cpu_symbol - Provide address inforamtion of per cpu debug symbol. * @symbol: Index of per cpu debug symbol array. * * Return address of core kernel symbol on success and a negative errno will be * returned in error cases. * */ void *android_debug_per_cpu_symbol(enum android_debug_per_cpu_symbol symbol) { if (symbol >= ADS_DEBUG_PER_CPU_END) return ERR_PTR(-EINVAL); return ads_per_cpu_entries[symbol].addr; } EXPORT_SYMBOL_NS_GPL(android_debug_per_cpu_symbol, MINIDUMP);