Commit fa09c392 authored Jun 08, 2022 by Francis Laniel Committed by Greg Kroah-Hartman Aug 25, 2022

arm64: Do not forget syscall when starting a new thread.



[ Upstream commit de6921856f99c11d3986c6702d851e1328d4f7f6 ]

Enable tracing of the execve*() system calls with the
syscalls:sys_exit_execve tracepoint by removing the call to
forget_syscall() when starting a new thread and preserving the value of
regs->syscallno across exec.

Signed-off-by: Francis Laniel <flaniel@linux.microsoft.com>
Link: https://lore.kernel.org/r/20220608162447.666494-2-flaniel@linux.microsoft.com


Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent c5940c08

arch/arm64/include/asm/processor.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -184,8 +184,9 @@ void tls_preserve_current_state(void);

		static inline void start_thread_common(struct pt_regs *regs, unsigned long pc)
		{
		s32 previous_syscall = regs->syscallno;
		memset(regs, 0, sizeof(*regs));
		forget_syscall(regs);
		regs->syscallno = previous_syscall;
		regs->pc = pc;

		if (system_uses_irq_prio_masking())