Re: [musl] Add PAGESIZE definition for LoongArch

[lixing <lixing@loongson.cn>]

在 2024/5/6 下午8:36, Rich Felker 写道:
> On Mon, May 06, 2024 at 05:05:36PM +0800, lixing wrote:
>> Hi, Rich,
>>
>>   arch/loongarch64/bits/limits.h | 1 +
>>   1 file changed, 1 insertion(+)
>>   create mode 100644 arch/loongarch64/bits/limits.h
>>
>> diff --git a/arch/loongarch64/bits/limits.h b/arch/loongarch64/bits/limits.h
>> new file mode 100644
>> index 00000000..5cd9aad6
>> --- /dev/null
>> +++ b/arch/loongarch64/bits/limits.h
>> @@ -0,0 +1 @@
>> +#define PAGESIZE 16384
> Can you explain why you want this change? I would be very hesitant to
> merge it. Defining PAGESIZE for an arch is a contract that the
> application-facing runtime page size (i.e. mmap granularity) can
> *never*, now or in the future, be anything other than the value you
> define this macro as having.

when I debuging "indent" program error, the  caculation of relro_start 
and relro_end in function kernel_mapped_dso get wrong value. It seems 
the PAGE_SIZE value is 0 and it come from libc.page_size, but the 
libc.page_size initialized until __dls3. Is there any other way to make 
the PAGE_SIZE correct at the before __dls3 ?

Also, if the xmalloc low and high address aparted by the  protect page 
in a  loop,  it seems to trigger SIGSEGV when the loop meet the protect 
page. Can this situation happen?

> Rich