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PowerPC emulation bugfixes:

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- don't generate multiple exit_tb at the end of conditional branches
- disable TRACE exception as it is not correct for embedded PowerPC.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2679 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
j_mayer 2007-04-16 07:18:42 +00:00
parent 95d1f3edd5
commit 08e46e54ea
1 changed files with 7 additions and 5 deletions
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12
target-ppc/translate.c
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@ -2806,11 +2806,11 @@ static inline void gen_bcond(DisasContext *ctx, int type)
#endif #endif
gen_op_btest_T1(ctx->nip); gen_op_btest_T1(ctx->nip);
gen_op_reset_T0(); gen_op_reset_T0();
}
no_test: no_test:
if (ctx->singlestep_enabled) if (ctx->singlestep_enabled)
gen_op_debug(); gen_op_debug();
gen_op_exit_tb(); gen_op_exit_tb();
}
ctx->exception = EXCP_BRANCH; ctx->exception = EXCP_BRANCH;
} }
@ -4725,7 +4725,7 @@ GEN_HANDLER(wrteei, 0x1F, 0x03, 0x05, 0x000EFC01, PPC_EMB_COMMON)
#endif #endif
} }
/* PPC 440 specific instructions */ /* PowerPC 440 specific instructions */
/* dlmzb */ /* dlmzb */
GEN_HANDLER(dlmzb, 0x1F, 0x0E, 0x02, 0x00000000, PPC_440_SPEC) GEN_HANDLER(dlmzb, 0x1F, 0x0E, 0x02, 0x00000000, PPC_440_SPEC)
{ {
@ -5838,6 +5838,7 @@ static inline int gen_intermediate_code_internal (CPUState *env,
handler->count++; handler->count++;
#endif #endif
/* Check trace mode exceptions */ /* Check trace mode exceptions */
#if 0 // XXX: buggy on embedded PowerPC
if (unlikely((msr_be && ctx.exception == EXCP_BRANCH) || if (unlikely((msr_be && ctx.exception == EXCP_BRANCH) ||
/* Check in single step trace mode /* Check in single step trace mode
* we need to stop except if: * we need to stop except if:
@ -5852,6 +5853,7 @@ static inline int gen_intermediate_code_internal (CPUState *env,
ctx.exception != EXCP_TRAP))) { ctx.exception != EXCP_TRAP))) {
RET_EXCP(ctxp, EXCP_TRACE, 0); RET_EXCP(ctxp, EXCP_TRACE, 0);
} }
#endif
/* if we reach a page boundary or are single stepping, stop /* if we reach a page boundary or are single stepping, stop
* generation * generation
*/ */