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authorRichard Henderson <richard.henderson@linaro.org>2023-08-02 14:29:40 -0700
committerRichard Henderson <richard.henderson@linaro.org>2023-08-08 13:24:27 -0700
commit2d708164e0475064e0e2167bd73e8570e22df1e0 (patch)
treef17712dd84f0ac07f6640ceee314fca2259bfe81 /linux-user/aarch64/target_mman.h
parentc8fb5cf97da11af11def1e910920c9ead03c304a (diff)
linux-user: Define TASK_UNMAPPED_BASE in $guest/target_mman.h
Provide default values that are as close as possible to the values used by the guest's kernel. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'linux-user/aarch64/target_mman.h')
-rw-r--r--linux-user/aarch64/target_mman.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/linux-user/aarch64/target_mman.h b/linux-user/aarch64/target_mman.h
index f721295fe1..4d3eecfb26 100644
--- a/linux-user/aarch64/target_mman.h
+++ b/linux-user/aarch64/target_mman.h
@@ -4,6 +4,16 @@
#define TARGET_PROT_BTI 0x10
#define TARGET_PROT_MTE 0x20
+/*
+ * arch/arm64/include/asm/processor.h:
+ *
+ * TASK_UNMAPPED_BASE DEFAULT_MAP_WINDOW / 4
+ * DEFAULT_MAP_WINDOW DEFAULT_MAP_WINDOW_64
+ * DEFAULT_MAP_WINDOW_64 UL(1) << VA_BITS_MIN
+ * VA_BITS_MIN 48 (unless explicitly configured smaller)
+ */
+#define TASK_UNMAPPED_BASE (1ull << (48 - 2))
+
#include "../generic/target_mman.h"
#endif