diff options
Diffstat (limited to 'target/i386/tcg/sysemu/bpt_helper.c')
| -rw-r--r-- | target/i386/tcg/sysemu/bpt_helper.c | 47 |
1 files changed, 29 insertions, 18 deletions
diff --git a/target/i386/tcg/sysemu/bpt_helper.c b/target/i386/tcg/sysemu/bpt_helper.c index 9bdf7e170b..805118c6b5 100644 --- a/target/i386/tcg/sysemu/bpt_helper.c +++ b/target/i386/tcg/sysemu/bpt_helper.c @@ -234,10 +234,30 @@ void breakpoint_handler(CPUState *cs) } } +target_ulong helper_get_dr(CPUX86State *env, int reg) +{ + if (reg >= 4 && reg < 6) { + if (env->cr[4] & CR4_DE_MASK) { + raise_exception_ra(env, EXCP06_ILLOP, GETPC()); + } else { + reg += 2; + } + } + + return env->dr[reg]; +} + void helper_set_dr(CPUX86State *env, int reg, target_ulong t0) { - switch (reg) { - case 0: case 1: case 2: case 3: + if (reg >= 4 && reg < 6) { + if (env->cr[4] & CR4_DE_MASK) { + raise_exception_ra(env, EXCP06_ILLOP, GETPC()); + } else { + reg += 2; + } + } + + if (reg < 4) { if (hw_breakpoint_enabled(env->dr[7], reg) && hw_breakpoint_type(env->dr[7], reg) != DR7_TYPE_IO_RW) { hw_breakpoint_remove(env, reg); @@ -246,25 +266,16 @@ void helper_set_dr(CPUX86State *env, int reg, target_ulong t0) } else { env->dr[reg] = t0; } - return; - case 4: - if (env->cr[4] & CR4_DE_MASK) { - break; + } else { + if (t0 & DR_RESERVED_MASK) { + raise_exception_err_ra(env, EXCP0D_GPF, 0, GETPC()); } - /* fallthru */ - case 6: - env->dr[6] = t0 | DR6_FIXED_1; - return; - case 5: - if (env->cr[4] & CR4_DE_MASK) { - break; + if (reg == 6) { + env->dr[6] = t0 | DR6_FIXED_1; + } else { + cpu_x86_update_dr7(env, t0); } - /* fallthru */ - case 7: - cpu_x86_update_dr7(env, t0); - return; } - raise_exception_err_ra(env, EXCP06_ILLOP, 0, GETPC()); } /* Check if Port I/O is trapped by a breakpoint. */ |