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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-11-04 21:04:39 +0100 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-11-22 16:35:07 +0100 |
commit | f1738ed619ed01199535410887a81c6ac99e482c (patch) | |
tree | 2578ed634fd96ffc933ec3470e2d06ff82cd8e5a /cpukit/score/cpu/m32c/rtems/score | |
parent | score: Inline _API_extensions_Run_postswitch() (diff) | |
download | rtems-f1738ed619ed01199535410887a81c6ac99e482c.tar.bz2 |
score: PR1607: Add and use CPU_SIZEOF_POINTER
Add and use new CPU port define CPU_SIZEOF_POINTER. It must be an
integer literal that can be used by the assembler. This value will be
used to calculate offsets of structure members. These offsets will be
used in assembler code.
The size of a pointer is part of the application binary interface (ABI)
and thus independent of the actual programming language. The compiler
will provide defines to determine the current ABI. We use these defines
to select the appropriate CPU_SIZEOF_POINTER value.
Static assertions in the new file "cpukit/score/src/percpuasm.c" will
ensure that the value of CPU_SIZEOF_POINTER is consistent with the
current compiler settings. Also the offset values used by assembler
code are verfied.
Diffstat (limited to 'cpukit/score/cpu/m32c/rtems/score')
-rw-r--r-- | cpukit/score/cpu/m32c/rtems/score/cpu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/cpukit/score/cpu/m32c/rtems/score/cpu.h b/cpukit/score/cpu/m32c/rtems/score/cpu.h index c1d1db876d..d83e93d009 100644 --- a/cpukit/score/cpu/m32c/rtems/score/cpu.h +++ b/cpukit/score/cpu/m32c/rtems/score/cpu.h @@ -575,6 +575,12 @@ typedef struct { */ #define CPU_STACK_MINIMUM_SIZE (2048L) +#ifdef __m32cm_cpu__ + #define CPU_SIZEOF_POINTER 4 +#else + #define CPU_SIZEOF_POINTER 2 +#endif + /** * CPU's worst alignment requirement for data types on a byte boundary. This * alignment does not take into account the requirements for the stack. |