diff mbox series

[06/24] linux-user: Populate more bits in mmap_flags_tbl

Message ID 20230630132159.376995-7-richard.henderson@linaro.org
State New
Headers show
Series linux-user: mmap range fixes | expand

Commit Message

Richard Henderson June 30, 2023, 1:21 p.m. UTC 
Fix translation of TARGET_MAP_SHARED and TARGET_MAP_PRIVATE,
which are types not single bits.  Add TARGET_MAP_SHARED_VALIDATE,
TARGET_MAP_SYNC, TARGET_MAP_NONBLOCK, TARGET_MAP_POPULATE,
TARGET_MAP_FIXED_NOREPLACE, and TARGET_MAP_UNINITIALIZED.

Update strace to match.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/strace.c  | 23 ++++++++++-------------
 linux-user/syscall.c | 18 ++++++++++++++++--
 2 files changed, 26 insertions(+), 15 deletions(-)

Comments

Alex Bennée July 3, 2023, 9:42 a.m. UTC | #1 
Richard Henderson <richard.henderson@linaro.org> writes:

> Fix translation of TARGET_MAP_SHARED and TARGET_MAP_PRIVATE,
> which are types not single bits.  Add TARGET_MAP_SHARED_VALIDATE,
> TARGET_MAP_SYNC, TARGET_MAP_NONBLOCK, TARGET_MAP_POPULATE,
> TARGET_MAP_FIXED_NOREPLACE, and TARGET_MAP_UNINITIALIZED.
>
> Update strace to match.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
diff mbox series

Patch

diff --git a/linux-user/strace.c b/linux-user/strace.c
index 566396d051..af5c5f135b 100644
--- a/linux-user/strace.c
+++ b/linux-user/strace.c
@@ -1094,28 +1094,25 @@  UNUSED static const struct flags mmap_prot_flags[] = {
 };
 
 UNUSED static const struct flags mmap_flags[] = {
-    FLAG_TARGET(MAP_SHARED),
-    FLAG_TARGET(MAP_PRIVATE),
+    FLAG_TARGET_MASK(MAP_SHARED, MAP_TYPE),
+    FLAG_TARGET_MASK(MAP_PRIVATE, MAP_TYPE),
+    FLAG_TARGET_MASK(MAP_SHARED_VALIDATE, MAP_TYPE),
     FLAG_TARGET(MAP_ANONYMOUS),
     FLAG_TARGET(MAP_DENYWRITE),
-    FLAG_TARGET(MAP_FIXED),
-    FLAG_TARGET(MAP_GROWSDOWN),
     FLAG_TARGET(MAP_EXECUTABLE),
-#ifdef MAP_LOCKED
+    FLAG_TARGET(MAP_FIXED),
+    FLAG_TARGET(MAP_FIXED_NOREPLACE),
+    FLAG_TARGET(MAP_GROWSDOWN),
+    FLAG_TARGET(MAP_HUGETLB),
     FLAG_TARGET(MAP_LOCKED),
-#endif
-#ifdef MAP_NONBLOCK
     FLAG_TARGET(MAP_NONBLOCK),
-#endif
     FLAG_TARGET(MAP_NORESERVE),
-#ifdef MAP_POPULATE
     FLAG_TARGET(MAP_POPULATE),
-#endif
-#if defined(TARGET_MAP_UNINITIALIZED) && TARGET_MAP_UNINITIALIZED != 0
+    FLAG_TARGET(MAP_STACK),
+    FLAG_TARGET(MAP_SYNC),
+#if TARGET_MAP_UNINITIALIZED != 0
     FLAG_TARGET(MAP_UNINITIALIZED),
 #endif
-    FLAG_TARGET(MAP_HUGETLB),
-    FLAG_TARGET(MAP_STACK),
     FLAG_END,
 };
 
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index f2cb101d83..459a2d8bc7 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6002,9 +6002,16 @@  static const StructEntry struct_termios_def = {
     .print = print_termios,
 };
 
+/* If the host does not provide these bits, they may be safely discarded. */
+#ifndef MAP_UNINITIALIZED
+#define MAP_UNINITIALIZED 0
+#endif
+
 static const bitmask_transtbl mmap_flags_tbl[] = {
-    { TARGET_MAP_SHARED, TARGET_MAP_SHARED, MAP_SHARED, MAP_SHARED },
-    { TARGET_MAP_PRIVATE, TARGET_MAP_PRIVATE, MAP_PRIVATE, MAP_PRIVATE },
+    { TARGET_MAP_TYPE, TARGET_MAP_SHARED, MAP_TYPE, MAP_SHARED },
+    { TARGET_MAP_TYPE, TARGET_MAP_PRIVATE, MAP_TYPE, MAP_PRIVATE },
+    { TARGET_MAP_TYPE, TARGET_MAP_SHARED_VALIDATE,
+      MAP_TYPE, MAP_SHARED_VALIDATE },
     { TARGET_MAP_FIXED, TARGET_MAP_FIXED, MAP_FIXED, MAP_FIXED },
     { TARGET_MAP_ANONYMOUS, TARGET_MAP_ANONYMOUS,
       MAP_ANONYMOUS, MAP_ANONYMOUS },
@@ -6022,6 +6029,13 @@  static const bitmask_transtbl mmap_flags_tbl[] = {
        Recognize it for the target insofar as we do not want to pass
        it through to the host.  */
     { TARGET_MAP_STACK, TARGET_MAP_STACK, 0, 0 },
+    { TARGET_MAP_SYNC, TARGET_MAP_SYNC, MAP_SYNC, MAP_SYNC },
+    { TARGET_MAP_NONBLOCK, TARGET_MAP_NONBLOCK, MAP_NONBLOCK, MAP_NONBLOCK },
+    { TARGET_MAP_POPULATE, TARGET_MAP_POPULATE, MAP_POPULATE, MAP_POPULATE },
+    { TARGET_MAP_FIXED_NOREPLACE, TARGET_MAP_FIXED_NOREPLACE,
+      MAP_FIXED_NOREPLACE, MAP_FIXED_NOREPLACE },
+    { TARGET_MAP_UNINITIALIZED, TARGET_MAP_UNINITIALIZED,
+      MAP_UNINITIALIZED, MAP_UNINITIALIZED },
     { 0, 0, 0, 0 }
 };