Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
29 lines
780 B
C
29 lines
780 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Generic return hook for LoongArch.
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*/
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#include <linux/kprobes.h>
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#include <linux/rethook.h>
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#include "rethook.h"
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/* This is called from arch_rethook_trampoline() */
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unsigned long __used arch_rethook_trampoline_callback(struct pt_regs *regs)
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{
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return rethook_trampoline_handler(regs, 0);
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}
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NOKPROBE_SYMBOL(arch_rethook_trampoline_callback);
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void arch_rethook_prepare(struct rethook_node *rhn, struct pt_regs *regs, bool mcount)
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{
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rhn->frame = 0;
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rhn->ret_addr = regs->regs[1];
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/* replace return addr with trampoline */
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regs->regs[1] = (unsigned long)arch_rethook_trampoline;
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}
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NOKPROBE_SYMBOL(arch_rethook_prepare);
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/* ASM function that handles the rethook must not be probed itself */
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NOKPROBE_SYMBOL(arch_rethook_trampoline);
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