riscv: Fix fp alignment bug in perf_callchain_user()

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[ Upstream commit 22ab08955e ]

The standard RISC-V calling convention said:
	"The stack grows downward and the stack pointer is always
	kept 16-byte aligned".

So perf_callchain_user() should check whether 16-byte aligned for fp.

Link: https://riscv.org/wp-content/uploads/2015/01/riscv-calling.pdf

Fixes: dbeb90b0c1 ("riscv: Add perf callchain support")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Cc: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/r/20240708032847.2998158-2-ruanjinjie@huawei.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Jinjie Ruan 2024-07-08 11:28:46 +08:00 • committed by Greg Kroah-Hartman

parent fb38951469

commit 518bd425d2

1 changed files with 1 additions and 1 deletions

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arch/riscv/kernel/perf_callchain.c

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