^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/arch/arm/lib/backtrace-clang.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2019 Nathan Huckleberry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kern_levels.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/assembler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) .text
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /* fp is 0 or stack frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define frame r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define sv_fp r5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define sv_pc r6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define mask r7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define sv_lr r8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define loglvl r9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) ENTRY(c_backtrace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #if !defined(CONFIG_FRAME_POINTER) || !defined(CONFIG_PRINTK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) ret lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) ENDPROC(c_backtrace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Clang does not store pc or sp in function prologues so we don't know exactly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * where the function starts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * We can treat the current frame's lr as the saved pc and the preceding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * frame's lr as the current frame's lr, but we can't trace the most recent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * call. Inserting a false stack frame allows us to reference the function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * called last in the stacktrace.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * If the call instruction was a bl we can look at the callers branch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * instruction to calculate the saved pc. We can recover the pc in most cases,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * but in cases such as calling function pointers we cannot. In this case,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * default to using the lr. This will be some address in the function, but will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * not be the function start.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * Unfortunately due to the stack frame layout we can't dump r0 - r3, but these
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * are less frequently saved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * Stack frame layout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * <larger addresses>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * saved lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * frame=> saved fp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * optionally saved caller registers (r4 - r10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * optionally saved arguments (r0 - r3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * <top of stack frame>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * <smaller addresses>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * Functions start with the following code sequence:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * corrected pc => stmfd sp!, {..., fp, lr}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * add fp, sp, #x
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * stmfd sp!, {r0 - r3} (optional)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * The diagram below shows an example stack setup for dump_stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * The frame for c_backtrace has pointers to the code of dump_stack. This is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * why the frame of c_backtrace is used to for the pc calculation of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * dump_stack. This is why we must move back a frame to print dump_stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * The stored locals for dump_stack are in dump_stack's frame. This means that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * to fully print dump_stack's frame we need both the frame for dump_stack (for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * locals) and the frame that was called by dump_stack (for pc).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * To print locals we must know where the function start is. If we read the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * function prologue opcodes we can determine which variables are stored in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * stack frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * To find the function start of dump_stack we can look at the stored LR of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * show_stack. It points at the instruction directly after the bl dump_stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * We can then read the offset from the bl opcode to determine where the branch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * takes us. The address calculated must be the start of dump_stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * c_backtrace frame dump_stack:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * {[LR] } ============| ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * {[FP] } =======| | bl c_backtrace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * | |=> ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * {[R4-R10]} |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * {[R0-R3] } | show_stack:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * dump_stack frame | ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * {[LR] } =============| bl dump_stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * {[FP] } <=======| |=> ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * {[R4-R10]}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * {[R0-R3] }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) stmfd sp!, {r4 - r9, fp, lr} @ Save an extra register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) @ to ensure 8 byte alignment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) movs frame, r0 @ if frame pointer is zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) beq no_frame @ we have no stack frames
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) mov loglvl, r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) tst r1, #0x10 @ 26 or 32-bit mode?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) moveq mask, #0xfc000003
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) movne mask, #0 @ mask for 32-bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * Switches the current frame to be the frame for dump_stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) add frame, sp, #24 @ switch to false frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) for_each_frame: tst frame, mask @ Check for address exceptions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) bne no_frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * sv_fp is the stack frame with the locals for the current considered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * sv_pc is the saved lr frame the frame above. This is a pointer to a code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * address within the current considered function, but it is not the function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * start. This value gets updated to be the function start later if it is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 1001: ldr sv_pc, [frame, #4] @ get saved 'pc'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 1002: ldr sv_fp, [frame, #0] @ get saved fp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) teq sv_fp, mask @ make sure next frame exists
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) beq no_frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * sv_lr is the lr from the function that called the current function. This is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * a pointer to a code address in the current function's caller. sv_lr-4 is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * the instruction used to call the current function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * This sv_lr can be used to calculate the function start if the function was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * called using a bl instruction. If the function start can be recovered sv_pc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * is overwritten with the function start.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * If the current function was called using a function pointer we cannot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * recover the function start and instead continue with sv_pc as an arbitrary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * value within the current function. If this is the case we cannot print
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * registers for the current function, but the stacktrace is still printed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * properly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 1003: ldr sv_lr, [sv_fp, #4] @ get saved lr from next frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) ldr r0, [sv_lr, #-4] @ get call instruction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) ldr r3, .Lopcode+4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) and r2, r3, r0 @ is this a bl call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) teq r2, r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) bne finished_setup @ give up if it's not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) and r0, #0xffffff @ get call offset 24-bit int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) lsl r0, r0, #8 @ sign extend offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) asr r0, r0, #8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) ldr sv_pc, [sv_fp, #4] @ get lr address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) add sv_pc, sv_pc, #-4 @ get call instruction address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) add sv_pc, sv_pc, #8 @ take care of prefetch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) add sv_pc, sv_pc, r0, lsl #2@ find function start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) finished_setup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) bic sv_pc, sv_pc, mask @ mask PC/LR for the mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * Print the function (sv_pc) and where it was called from (sv_lr).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 1004: mov r0, sv_pc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) mov r1, sv_lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) mov r2, frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) bic r1, r1, mask @ mask PC/LR for the mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) mov r3, loglvl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) bl dump_backtrace_entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * Test if the function start is a stmfd instruction to determine which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * registers were stored in the function prologue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * If we could not recover the sv_pc because we were called through a function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * pointer the comparison will fail and no registers will print. Unwinding will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * continue as if there had been no registers stored in this frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 1005: ldr r1, [sv_pc, #0] @ if stmfd sp!, {..., fp, lr}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ldr r3, .Lopcode @ instruction exists,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) teq r3, r1, lsr #11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ldr r0, [frame] @ locals are stored in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) @ the preceding frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) subeq r0, r0, #4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) mov r2, loglvl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) bleq dump_backtrace_stm @ dump saved registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * If we are out of frames or if the next frame is invalid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) teq sv_fp, #0 @ zero saved fp means
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) beq no_frame @ no further frames
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) cmp sv_fp, frame @ next frame must be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) mov frame, sv_fp @ above the current frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) bhi for_each_frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 1006: adr r0, .Lbad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) mov r1, loglvl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) mov r2, frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) bl printk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) no_frame: ldmfd sp!, {r4 - r9, fp, pc}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) ENDPROC(c_backtrace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) .pushsection __ex_table,"a"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) .align 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) .long 1001b, 1006b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) .long 1002b, 1006b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) .long 1003b, 1006b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) .long 1004b, 1006b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) .long 1005b, 1006b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) .popsection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) .Lbad: .asciz "%sBacktrace aborted due to bad frame pointer <%p>\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) .align
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) .Lopcode: .word 0xe92d4800 >> 11 @ stmfd sp!, {... fp, lr}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) .word 0x0b000000 @ bl if these bits are set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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