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target-mips: fix semihosting for microMIPS R6 

In semihosting mode the SDBBP 1 instructions should trigger UHI syscall,
but in QEMU this does not happen for recently added microMIPS R6.
Consequently bare metal microMIPS R6 programs supporting UHI will not run.

Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Leon Alrae 2015-08-03 13:01:19 +01:00
parent e95edefbd0
commit 060ebfef1a
1 changed files with 7 additions and 3 deletions
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10
target-mips/translate.c
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@ -13278,10 +13278,14 @@ static void gen_pool16c_r6_insn(DisasContext *ctx)
break; break;
case R6_SDBBP16: case R6_SDBBP16:
/* SDBBP16 */ /* SDBBP16 */
if (ctx->hflags & MIPS_HFLAG_SBRI) { if (is_uhi(extract32(ctx->opcode, 6, 4))) {
generate_exception(ctx, EXCP_RI); gen_helper_do_semihosting(cpu_env);
} else { } else {
generate_exception(ctx, EXCP_DBp); if (ctx->hflags & MIPS_HFLAG_SBRI) {
generate_exception(ctx, EXCP_RI);
} else {
generate_exception(ctx, EXCP_DBp);
}
} }
break; break;
} }