Lines Matching +full:bl +full:- +full:code +full:- +full:offset

1 // SPDX-License-Identifier: GPL-2.0-only
15 #include <asm/debug-monitors.h>
33 	 * Carefully read and modify the code with aarch64_insn_*() which uses  in ftrace_modify_code()
39 			return -EFAULT;  in ftrace_modify_code()
42 			return -EINVAL;  in ftrace_modify_code()
45 		return -EPERM;  in ftrace_modify_code()
68 	struct plt_entry *plt = mod->arch.ftrace_trampolines;  in get_ftrace_plt()
82  * Due to the limited range of 'BL' instructions, modules may be placed too far
92 	unsigned long pc = rec->ip;  in ftrace_find_callable_addr()
93 	long offset = (long)*addr - (long)pc;  in ftrace_find_callable_addr()  local
97 	 * When the target is within range of the 'BL' instruction, use 'addr'  in ftrace_find_callable_addr()
98 	 * as-is and branch to that directly.  in ftrace_find_callable_addr()
100 	if (offset >= -SZ_128M && offset < SZ_128M)  in ftrace_find_callable_addr()
104 	 * When the target is outside of the range of a 'BL' instruction, we  in ftrace_find_callable_addr()
106 	 * only when module PLT support is built-in.  in ftrace_find_callable_addr()
113 	 * dealing with an out-of-range condition, we can assume it  in ftrace_find_callable_addr()
118 	 * retains its validity throughout the remainder of this code.  in ftrace_find_callable_addr()
144 	unsigned long pc = rec->ip;  in ftrace_make_call()
148 		return -EINVAL;  in ftrace_make_call()
160 	unsigned long pc = rec->ip;  in ftrace_modify_call()
164 		return -EINVAL;  in ftrace_modify_call()
166 		return -EINVAL;  in ftrace_modify_call()
177  * All instrumented functions follow the AAPCS, so x0-x8 and x19-x30 are live,
178  * and x9-x18 are free for our use.
180  * At runtime we want to be able to swing a single NOP <-> BL to enable or
181  * disable the ftrace call. The BL requires us to save the original LR value,
186  * +----------+------------+------------+
188  * | NOP      | NOP        | BL <entry> |
194  * Note: ftrace_process_locs() has pre-adjusted rec->ip to be the address of
195  * the BL.
199 	unsigned long pc = rec->ip - AARCH64_INSN_SIZE;  in ftrace_init_nop()
216 	unsigned long pc = rec->ip;  in ftrace_make_nop()
236 		return -EINVAL;  in ftrace_make_nop()
270 	if (unlikely(atomic_read(&current->tracing_graph_pause)))  in prepare_ftrace_return()