On Fri, Dec 9, 2011 at 2:47 PM, Ian Lance Taylor <i...@google.com> wrote:
> "H.J. Lu" <hongjiu...@intel.com> writes:
>
>> Some my Linux system, system call numbers are defined as
>>
>> #define __NR_x32_rt_sigaction                 __NR_X32_SYSCALL(0)
>>
>> and
>>
>> __NR_X32_SYSCALL(0) is expanded to (0x40000000 | (512 + 0)).  This patch
>> tries to deal with by checking '^// unknowndefine SYS_[a-z]' and uses
>> "${CC} -E" to extract the real number.  Tested on Linux/x86-64.  OK
>> to install?
>
> This patch might be a little simpler.  Does it solve the problem?
>
It doesn't work. I didn't define all system call numbers which are mapped to
sys_ni_syscall in kernel.  If you use them, you will get a compile
time error since those __NR_XXXX aren't defined.  I used

+    ${CC} -E unknown-syscalls.c | \
+      grep "^const SYS_.*=" | \
+      grep -v __NR_ >> ${OUT}

to filter them out.

-- 
H.J.

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