| 1 | #ifndef _LTTNG_WRAPPER_KALLSYMS_H |
| 2 | #define _LTTNG_WRAPPER_KALLSYMS_H |
| 3 | |
| 4 | /* |
| 5 | * wrapper/kallsyms.h |
| 6 | * |
| 7 | * wrapper around kallsyms_lookup_name. Implements arch-dependent code for |
| 8 | * arches where the address of the start of the function body is different |
| 9 | * from the pointer which can be used to call the function, e.g. ARM THUMB2. |
| 10 | * |
| 11 | * Copyright (C) 2011 Avik Sil (avik.sil@linaro.org) |
| 12 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 13 | * |
| 14 | * This library is free software; you can redistribute it and/or |
| 15 | * modify it under the terms of the GNU Lesser General Public |
| 16 | * License as published by the Free Software Foundation; only |
| 17 | * version 2.1 of the License. |
| 18 | * |
| 19 | * This library is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | * Lesser General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU Lesser General Public |
| 25 | * License along with this library; if not, write to the Free Software |
| 26 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 27 | */ |
| 28 | |
| 29 | #include <linux/kallsyms.h> |
| 30 | |
| 31 | static inline |
| 32 | unsigned long kallsyms_lookup_funcptr(const char *name) |
| 33 | { |
| 34 | unsigned long addr; |
| 35 | |
| 36 | addr = kallsyms_lookup_name(name); |
| 37 | #ifdef CONFIG_ARM |
| 38 | #ifdef CONFIG_THUMB2_KERNEL |
| 39 | if (addr) |
| 40 | addr |= 1; /* set bit 0 in address for thumb mode */ |
| 41 | #endif |
| 42 | #endif |
| 43 | return addr; |
| 44 | } |
| 45 | #endif /* _LTTNG_WRAPPER_KALLSYMS_H */ |