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998b17d444
LoongArch defines UPROBE_SWBP_INSN as a function call and this breaks
arch_uprobe_trampoline() which uses it to initialize a static variable.
Add the new "__builtin_constant_p" helper, __emit_break(), and redefine
the current users of larch_insn_gen_break() to use it.
Fixes: ff474a78ce ("uprobe: Add uretprobe syscall to speed up return probe")
Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://lore.kernel.org/all/20240614174822.GA1185149@thelio-3990X/
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Tested-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
36 lines
954 B
C
36 lines
954 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __ASM_LOONGARCH_UPROBES_H
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#define __ASM_LOONGARCH_UPROBES_H
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#include <asm/inst.h>
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typedef u32 uprobe_opcode_t;
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#define MAX_UINSN_BYTES 8
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#define UPROBE_XOL_SLOT_BYTES MAX_UINSN_BYTES
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#define UPROBE_SWBP_INSN __emit_break(BRK_UPROBE_BP)
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#define UPROBE_SWBP_INSN_SIZE LOONGARCH_INSN_SIZE
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#define UPROBE_XOLBP_INSN __emit_break(BRK_UPROBE_XOLBP)
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struct arch_uprobe {
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unsigned long resume_era;
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u32 insn[2];
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u32 ixol[2];
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bool simulate;
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};
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struct arch_uprobe_task {
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unsigned long saved_trap_nr;
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};
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#ifdef CONFIG_UPROBES
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bool uprobe_breakpoint_handler(struct pt_regs *regs);
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bool uprobe_singlestep_handler(struct pt_regs *regs);
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#else /* !CONFIG_UPROBES */
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static inline bool uprobe_breakpoint_handler(struct pt_regs *regs) { return false; }
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static inline bool uprobe_singlestep_handler(struct pt_regs *regs) { return false; }
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#endif /* CONFIG_UPROBES */
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#endif /* __ASM_LOONGARCH_UPROBES_H */
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