From 58bb5081cba130f12c26d8e4d5e9416a0272f07e Mon Sep 17 00:00:00 2001 From: Rander Wang Date: Tue, 19 Sep 2023 12:24:08 +0300 Subject: [PATCH] ASoC: SOF: Xtensa: dump ar registers to restore call stack MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit On Xtensa platform ar0 is for caller address and ar1 is for stack address. The ar register dump can be used to rebuild call stack with FW elf file by debug tools. Signed-off-by: Rander Wang Reviewed-by: Péter Ujfalusi Reviewed-by: Kai Vehmanen Reviewed-by: Pierre-Louis Bossart Reviewed-by: Guennadi Liakhovetski Signed-off-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20230919092416.4137-2-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown --- sound/soc/sof/xtensa/core.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/sound/soc/sof/xtensa/core.c b/sound/soc/sof/xtensa/core.c index bebbe3a2865c4..7c91a919eadc7 100644 --- a/sound/soc/sof/xtensa/core.c +++ b/sound/soc/sof/xtensa/core.c @@ -132,6 +132,17 @@ static void xtensa_stack(struct snd_sof_dev *sdev, const char *level, void *oops buf, sizeof(buf), false); dev_printk(level, sdev->dev, "0x%08x: %s\n", stack_ptr + i * 4, buf); } + + if (!xoops->plat_hdr.numaregs) + return; + + dev_printk(level, sdev->dev, "AR registers:\n"); + /* the number of ar registers is a multiple of 4 */ + for (i = 0; i < xoops->plat_hdr.numaregs; i += 4) { + hex_dump_to_buffer(xoops->ar + i, 16, 16, 4, + buf, sizeof(buf), false); + dev_printk(level, sdev->dev, "%#x: %s\n", i * 4, buf); + } } const struct dsp_arch_ops sof_xtensa_arch_ops = { -- 2.30.2