[PATCH] lib: sbi_illegal_insn: Emulate 'MZ'/c.li s4,-13 instruction

[Andreas Schwab]

On Nov 08 2023, Björn Töpel wrote:

> +static int compressed_insn(ulong insn, struct sbi_trap_regs *regs)
> +{
> +	/* Only handle 'MZ'/c.li s4,-13/0x5a3d */
> +	if (!misa_extension('C') && (insn & 0xffff) == 0x5a4d) {
> +		regs->s4 = -13;
> +		regs->mepc += 4;

By skipping 4 bytes execution will resume in the middle of the next insn
(the jump around the header).

-- 
Andreas Schwab, schwab at linux-m68k.org
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