Re: [PATCH 1/3] MIPS: kernel: Support extracting off-line stack traces from user-space with perf
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: 2021-02-01 11:01:25
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lkml
On Tue, Dec 29, 2020 at 08:55:59PM +0800, Tiezhu Yang wrote:
quoted hunk ↗ jump to hunk
+++ b/arch/mips/include/uapi/asm/perf_regs.h@@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _ASM_MIPS_PERF_REGS_H +#define _ASM_MIPS_PERF_REGS_H + +enum perf_event_mips_regs { + PERF_REG_MIPS_PC, + PERF_REG_MIPS_R1, + PERF_REG_MIPS_R2, + PERF_REG_MIPS_R3, + PERF_REG_MIPS_R4, + PERF_REG_MIPS_R5, + PERF_REG_MIPS_R6, + PERF_REG_MIPS_R7, + PERF_REG_MIPS_R8, + PERF_REG_MIPS_R9, + PERF_REG_MIPS_R10, + PERF_REG_MIPS_R11, + PERF_REG_MIPS_R12, + PERF_REG_MIPS_R13, + PERF_REG_MIPS_R14, + PERF_REG_MIPS_R15, + PERF_REG_MIPS_R16, + PERF_REG_MIPS_R17, + PERF_REG_MIPS_R18, + PERF_REG_MIPS_R19, + PERF_REG_MIPS_R20, + PERF_REG_MIPS_R21, + PERF_REG_MIPS_R22, + PERF_REG_MIPS_R23, + PERF_REG_MIPS_R24, + PERF_REG_MIPS_R25, + /* + * 26 and 27 are k0 and k1, they are always clobbered thus not + * stored. + */
haveing this hole here make all code more complicated. Does it hurt to have R26 and R27 in the list ? Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]