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This kernel feature is required for enabling BPF_KPROBE_OVERRIDE. Define override_function_with_return() and regs_set_return_value() functions, and fix compile errors in syscall_wrapper.h. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
14 lines
365 B
C
14 lines
365 B
C
// SPDX-License-Identifier: GPL-2.0+
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#include <asm/ptrace.h>
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#include <linux/error-injection.h>
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#include <linux/kprobes.h>
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void override_function_with_return(struct pt_regs *regs)
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{
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/*
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* Emulate 'br 14'. 'regs' is captured by kprobes on entry to some
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* kernel function.
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*/
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regs->psw.addr = regs->gprs[14];
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}
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NOKPROBE_SYMBOL(override_function_with_return);
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