change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/arch/arm/kernel/unwind.c
..
..
@@ -300,6 +300,29 @@
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 	return URC_OK;
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 }
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+static unsigned long unwind_decode_uleb128(struct unwind_ctrl_block *ctrl)
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+{
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+	unsigned long bytes = 0;
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+	unsigned long insn;
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+	unsigned long result = 0;
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+
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+	/*
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+	 * unwind_get_byte() will advance `ctrl` one instruction at a time, so
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+	 * loop until we get an instruction byte where bit 7 is not set.
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+	 *
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+	 * Note: This decodes a maximum of 4 bytes to output 28 bits data where
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+	 * max is 0xfffffff: that will cover a vsp increment of 1073742336, hence
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+	 * it is sufficient for unwinding the stack.
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+	 */
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+	do {
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+		insn = unwind_get_byte(ctrl);
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+		result |= (insn & 0x7f) << (bytes * 7);
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+		bytes++;
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+	} while (!!(insn & 0x80) && (bytes != sizeof(result)));
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+
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+	return result;
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+}
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+
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 /*
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  * Execute the current unwind instruction.
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  */
..
..
@@ -353,7 +376,7 @@
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 		if (ret)
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 			goto error;
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 	} else if (insn == 0xb2) {
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-		unsigned long uleb128 = unwind_get_byte(ctrl);
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+		unsigned long uleb128 = unwind_decode_uleb128(ctrl);
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 		ctrl->vrs[SP] += 0x204 + (uleb128 << 2);
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 	} else {