From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/mips/include/asm/stacktrace.h | 89 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 arch/mips/include/asm/stacktrace.h (limited to 'arch/mips/include/asm/stacktrace.h') diff --git a/arch/mips/include/asm/stacktrace.h b/arch/mips/include/asm/stacktrace.h new file mode 100644 index 000000000..8ad25c25b --- /dev/null +++ b/arch/mips/include/asm/stacktrace.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_STACKTRACE_H +#define _ASM_STACKTRACE_H + +#include +#include +#include + +#ifdef CONFIG_KALLSYMS +extern int raw_show_trace; +extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, + unsigned long pc, unsigned long *ra); +extern unsigned long unwind_stack_by_address(unsigned long stack_page, + unsigned long *sp, + unsigned long pc, + unsigned long *ra); +#else +#define raw_show_trace 1 +static inline unsigned long unwind_stack(struct task_struct *task, + unsigned long *sp, unsigned long pc, unsigned long *ra) +{ + return 0; +} +#endif + +#define STR_PTR_LA __stringify(PTR_LA) +#define STR_LONG_S __stringify(LONG_S) +#define STR_LONG_L __stringify(LONG_L) +#define STR_LONGSIZE __stringify(LONGSIZE) + +#define STORE_ONE_REG(r) \ + STR_LONG_S " $" __stringify(r)",("STR_LONGSIZE"*"__stringify(r)")(%1)\n\t" + +static __always_inline void prepare_frametrace(struct pt_regs *regs) +{ +#ifndef CONFIG_KALLSYMS + /* + * Remove any garbage that may be in regs (specially func + * addresses) to avoid show_raw_backtrace() to report them + */ + memset(regs, 0, sizeof(*regs)); +#endif + __asm__ __volatile__( + ".set push\n\t" + ".set noat\n\t" + /* Store $1 so we can use it */ + STR_LONG_S " $1,"STR_LONGSIZE"(%1)\n\t" + /* Store the PC */ + "1: " STR_PTR_LA " $1, 1b\n\t" + STR_LONG_S " $1,%0\n\t" + STORE_ONE_REG(2) + STORE_ONE_REG(3) + STORE_ONE_REG(4) + STORE_ONE_REG(5) + STORE_ONE_REG(6) + STORE_ONE_REG(7) + STORE_ONE_REG(8) + STORE_ONE_REG(9) + STORE_ONE_REG(10) + STORE_ONE_REG(11) + STORE_ONE_REG(12) + STORE_ONE_REG(13) + STORE_ONE_REG(14) + STORE_ONE_REG(15) + STORE_ONE_REG(16) + STORE_ONE_REG(17) + STORE_ONE_REG(18) + STORE_ONE_REG(19) + STORE_ONE_REG(20) + STORE_ONE_REG(21) + STORE_ONE_REG(22) + STORE_ONE_REG(23) + STORE_ONE_REG(24) + STORE_ONE_REG(25) + STORE_ONE_REG(26) + STORE_ONE_REG(27) + STORE_ONE_REG(28) + STORE_ONE_REG(29) + STORE_ONE_REG(30) + STORE_ONE_REG(31) + /* Restore $1 */ + STR_LONG_L " $1,"STR_LONGSIZE"(%1)\n\t" + ".set pop\n\t" + : "=m" (regs->cp0_epc) + : "r" (regs->regs) + : "memory"); +} + +#endif /* _ASM_STACKTRACE_H */ -- cgit v1.2.3