[Qemu-devel] [PATCH] target-i386: Fix segment cache dump

[Tobias Markus]

When in Long Mode, cpu_x86_seg_cache() logs "DS16" because the Default
operation size bit (D/B bit) is not set for Long Mode Data Segments
since there are only Data Segments in Long Mode and no explicit
16/32/64-bit Descriptors.
This patch fixes this by checking the Long Mode Active bit of the hidden
flags variable and logging "DS" if it is set, i.e. in Long Mode all Data
Segments are logged as "DS".

Signed-off-by: Tobias Markus <address@hidden>
---
Note that alternatively, Data Segments in Long Mode could be logged as
"DS64" to avoid confusion about the missing 64 postfix. (But that would
be, strictly speaking, wrong because there are only DSs and no
DS16/32/64 in Long Mode.)
PS: This is my first contribution to an Open Source Project and I would
be very happy about constructive feedback, especially about possible
wrong word wrapping.
 target-i386/helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target-i386/helper.c b/target-i386/helper.c
index bf3e2ac..a8facdf 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -147,7 +147,7 @@ cpu_x86_dump_seg_cache(CPUX86State *env, FILE *f,
fprintf_function cpu_fprintf,
             cpu_fprintf(f, " [%c%c", (sc->flags & DESC_C_MASK) ? 'C' : '-',
                         (sc->flags & DESC_R_MASK) ? 'R' : '-');
         } else {
-            cpu_fprintf(f, (sc->flags & DESC_B_MASK) ? "DS  " : "DS16");
+            cpu_fprintf(f, (sc->flags & DESC_B_MASK || env->hflags &
HF_LMA_MASK) ? "DS  " : "DS16");
             cpu_fprintf(f, " [%c%c", (sc->flags & DESC_E_MASK) ? 'E' : '-',
                         (sc->flags & DESC_W_MASK) ? 'W' : '-');
         }
-- 
1.8.3.4