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| author | Peter Maydell <peter.maydell@linaro.org> | 2023-04-24 16:39:09 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2023-05-02 15:47:41 +0100 |
| commit | 2b67d0ff971cb232c6d3cbb2cc44d9e2b7a7aac2 (patch) | |
| tree | d6715df48e1aa12ef4cc7dc5c92cedbb66eac23b /target/arm | |
| parent | 7f3a3d3dc433dc06c0adb480729af80f9c8e3739 (diff) | |
| download | qemu-2b67d0ff971cb232c6d3cbb2cc44d9e2b7a7aac2.zip qemu-2b67d0ff971cb232c6d3cbb2cc44d9e2b7a7aac2.tar.gz qemu-2b67d0ff971cb232c6d3cbb2cc44d9e2b7a7aac2.tar.bz2 | |
target/arm: Add compile time asserts to load/store_cpu_field macros
Add some compile-time asserts to the load_cpu_field() and store_cpu_field()
macros that the struct field being accessed is the expected size. This
lets us catch cases where we incorrectly tried to do a 32-bit load
from a 64-bit struct field.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230424153909.1419369-3-peter.maydell@linaro.org
Diffstat (limited to 'target/arm')
| -rw-r--r-- | target/arm/translate-a32.h | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/target/arm/translate-a32.h b/target/arm/translate-a32.h index 99eea85..48a1537 100644 --- a/target/arm/translate-a32.h +++ b/target/arm/translate-a32.h @@ -59,7 +59,12 @@ static inline TCGv_i32 load_cpu_offset(int offset) return tmp; } -#define load_cpu_field(name) load_cpu_offset(offsetof(CPUARMState, name)) +/* Load from a 32-bit field to a TCGv_i32 */ +#define load_cpu_field(name) \ + ({ \ + QEMU_BUILD_BUG_ON(sizeof_field(CPUARMState, name) != 4); \ + load_cpu_offset(offsetof(CPUARMState, name)); \ + }) /* Load from the low half of a 64-bit field to a TCGv_i32 */ #define load_cpu_field_low32(name) \ @@ -70,9 +75,13 @@ static inline TCGv_i32 load_cpu_offset(int offset) void store_cpu_offset(TCGv_i32 var, int offset, int size); -#define store_cpu_field(var, name) \ - store_cpu_offset(var, offsetof(CPUARMState, name), \ - sizeof_field(CPUARMState, name)) +#define store_cpu_field(val, name) \ + ({ \ + QEMU_BUILD_BUG_ON(sizeof_field(CPUARMState, name) != 4 \ + && sizeof_field(CPUARMState, name) != 1); \ + store_cpu_offset(val, offsetof(CPUARMState, name), \ + sizeof_field(CPUARMState, name)); \ + }) #define store_cpu_field_constant(val, name) \ store_cpu_field(tcg_constant_i32(val), name) |