diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-05-29 13:18:56 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-06-08 10:33:38 +0200 |
| commit | 57f8dbdbe94a502301f51809e8b282b02df43370 (patch) | |
| tree | a02f1bc3f03e72d5d12f4669fe200a0955ef7922 /target/i386/tcg/sysemu | |
| parent | 330e6adc1acd2a235a96b502b3dd15ba6e77c228 (diff) | |
| download | qemu-57f8dbdbe94a502301f51809e8b282b02df43370.zip qemu-57f8dbdbe94a502301f51809e8b282b02df43370.tar.gz qemu-57f8dbdbe94a502301f51809e8b282b02df43370.tar.bz2 | |
target/i386: implement DR7.GD
DR7.GD triggers a #DB exception on any access to debug registers.
The GD bit is cleared so that the #DB handler itself can access
the debug registers.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/tcg/sysemu')
| -rw-r--r-- | target/i386/tcg/sysemu/bpt_helper.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/target/i386/tcg/sysemu/bpt_helper.c b/target/i386/tcg/sysemu/bpt_helper.c index 4d96a48..c1d5fce 100644 --- a/target/i386/tcg/sysemu/bpt_helper.c +++ b/target/i386/tcg/sysemu/bpt_helper.c @@ -238,6 +238,12 @@ target_ulong helper_get_dr(CPUX86State *env, int reg) } } + if (env->dr[7] & DR7_GD) { + env->dr[7] &= ~DR7_GD; + env->dr[6] |= DR6_BD; + raise_exception_ra(env, EXCP01_DB, GETPC()); + } + return env->dr[reg]; } @@ -251,6 +257,12 @@ void helper_set_dr(CPUX86State *env, int reg, target_ulong t0) } } + if (env->dr[7] & DR7_GD) { + env->dr[7] &= ~DR7_GD; + env->dr[6] |= DR6_BD; + raise_exception_ra(env, EXCP01_DB, GETPC()); + } + if (reg < 4) { if (hw_breakpoint_enabled(env->dr[7], reg) && hw_breakpoint_type(env->dr[7], reg) != DR7_TYPE_IO_RW) { |