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fixed lsw[ix] / stsw[ix] potential exception bug - mtcrf workaround for Mac OS X 10.4 - use direct jump at page boundary 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1441 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-06-04 22:22:27 +00:00
parent 71be0fc3eb
commit 8dd4983c4e
1 changed files with 16 additions and 3 deletions
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19
target-ppc/translate.c
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@ -1370,6 +1370,8 @@ GEN_HANDLER(lswi, 0x1F, 0x15, 0x12, 0x00000001, PPC_INTEGER)
gen_op_load_gpr_T0(ra);
}
gen_op_set_T1(nb);
/* NIP cannot be restored if the memory exception comes from an helper */
gen_op_update_nip((ctx)->nip - 4);
op_ldsts(lswi, start);
}
@ -1388,6 +1390,8 @@ GEN_HANDLER(lswx, 0x1F, 0x15, 0x10, 0x00000001, PPC_INTEGER)
gen_op_add();
}
gen_op_load_xer_bc();
/* NIP cannot be restored if the memory exception comes from an helper */
gen_op_update_nip((ctx)->nip - 4);
op_ldstsx(lswx, rD(ctx->opcode), ra, rb);
}
@ -1404,6 +1408,8 @@ GEN_HANDLER(stswi, 0x1F, 0x15, 0x16, 0x00000001, PPC_INTEGER)
if (nb == 0)
nb = 32;
gen_op_set_T1(nb);
/* NIP cannot be restored if the memory exception comes from an helper */
gen_op_update_nip((ctx)->nip - 4);
op_ldsts(stsw, rS(ctx->opcode));
}
@ -1421,6 +1427,8 @@ GEN_HANDLER(stswx, 0x1F, 0x15, 0x14, 0x00000001, PPC_INTEGER)
gen_op_add();
}
gen_op_load_xer_bc();
/* NIP cannot be restored if the memory exception comes from an helper */
gen_op_update_nip((ctx)->nip - 4);
op_ldsts(stsw, rS(ctx->opcode));
}
@ -2123,7 +2131,8 @@ GEN_HANDLER(mftb, 0x1F, 0x13, 0x0B, 0x00000001, PPC_MISC)
}
/* mtcrf */
GEN_HANDLER(mtcrf, 0x1F, 0x10, 0x04, 0x00100801, PPC_MISC)
/* The mask should be 0x00100801, but Mac OS X 10.4 use an alternate form */
GEN_HANDLER(mtcrf, 0x1F, 0x10, 0x04, 0x00000801, PPC_MISC)
{
gen_op_load_gpr_T0(rS(ctx->opcode));
gen_op_store_cr(CRM(ctx->opcode));
@ -3312,10 +3321,14 @@ int gen_intermediate_code_internal (CPUState *env, TranslationBlock *tb,
ctx.exception != EXCP_TRAP)) {
RET_EXCP(ctxp, EXCP_TRACE, 0);
}
if (ctx.exception != EXCP_NONE)
break;
/* if we reach a page boundary, stop generation */
if ((ctx.nip & (TARGET_PAGE_SIZE - 1)) == 0) {
RET_EXCP(ctxp, EXCP_BRANCH, 0);
}
gen_op_b((long)ctx.tb, ctx.nip);
ctx.exception = EXCP_BRANCH;
break;
}
}
if (ctx.exception == EXCP_NONE) {
gen_op_b((unsigned long)ctx.tb, ctx.nip);