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target-s390x: fix exception for invalid operation code

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When an operation code is not recognized (ie invalid instruction) an
operation exception should be generated instead of a specification
exception. The latter is for valid opcode, with invalid operands or
modifiers.

This give a very basic GDB support in the guest, as it uses the invalid
opcode 0x0001 to generate a trap.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aurelien Jarno 2015-06-03 23:09:41 +02:00 • committed by Alexander Graf
parent a1c7610a68
commit 111d7f4a69
1 changed files with 1 additions and 1 deletions
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2
target-s390x/translate.c
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@ -320,7 +320,7 @@ static void gen_program_exception(DisasContext *s, int code)
static inline void gen_illegal_opcode(DisasContext *s)
{
gen_program_exception(s, PGM_SPECIFICATION);
gen_program_exception(s, PGM_OPERATION);
}
#ifndef CONFIG_USER_ONLY