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cb8a2ef084
The kernel CONFIG_UNWINDER_ORC option enables the ORC unwinder, which is similar in concept to a DWARF unwinder. The difference is that the format of the ORC data is much simpler than DWARF, which in turn allows the ORC unwinder to be much simpler and faster. The ORC data consists of unwind tables which are generated by objtool. After analyzing all the code paths of a .o file, it determines information about the stack state at each instruction address in the file and outputs that information to the .orc_unwind and .orc_unwind_ip sections. The per-object ORC sections are combined at link time and are sorted and post-processed at boot time. The unwinder uses the resulting data to correlate instruction addresses with their stack states at run time. Most of the logic are similar with x86, in order to get ra info before ra is saved into stack, add ra_reg and ra_offset into orc_entry. At the same time, modify some arch-specific code to silence the objtool warnings. Co-developed-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Jinyang He <hejinyang@loongson.cn> Co-developed-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __ASM_EXCEPTION_H
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#define __ASM_EXCEPTION_H
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#include <asm/ptrace.h>
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#include <linux/kprobes.h>
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extern void *exception_table[];
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void show_registers(struct pt_regs *regs);
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asmlinkage void cache_parity_error(void);
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asmlinkage void noinstr do_ade(struct pt_regs *regs);
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asmlinkage void noinstr do_ale(struct pt_regs *regs);
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asmlinkage void noinstr do_bce(struct pt_regs *regs);
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asmlinkage void noinstr do_bp(struct pt_regs *regs);
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asmlinkage void noinstr do_ri(struct pt_regs *regs);
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asmlinkage void noinstr do_fpu(struct pt_regs *regs);
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asmlinkage void noinstr do_fpe(struct pt_regs *regs, unsigned long fcsr);
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asmlinkage void noinstr do_lsx(struct pt_regs *regs);
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asmlinkage void noinstr do_lasx(struct pt_regs *regs);
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asmlinkage void noinstr do_lbt(struct pt_regs *regs);
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asmlinkage void noinstr do_watch(struct pt_regs *regs);
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asmlinkage void noinstr do_syscall(struct pt_regs *regs);
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asmlinkage void noinstr do_reserved(struct pt_regs *regs);
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asmlinkage void noinstr do_vint(struct pt_regs *regs, unsigned long sp);
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asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
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unsigned long write, unsigned long address);
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asmlinkage void handle_ade(void);
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asmlinkage void handle_ale(void);
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asmlinkage void handle_bce(void);
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asmlinkage void handle_sys(void);
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asmlinkage void handle_bp(void);
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asmlinkage void handle_ri(void);
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asmlinkage void handle_fpu(void);
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asmlinkage void handle_fpe(void);
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asmlinkage void handle_lsx(void);
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asmlinkage void handle_lasx(void);
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asmlinkage void handle_lbt(void);
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asmlinkage void handle_watch(void);
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asmlinkage void handle_reserved(void);
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asmlinkage void handle_vint(void);
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asmlinkage void noinstr handle_loongarch_irq(struct pt_regs *regs);
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#endif /* __ASM_EXCEPTION_H */
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