Re: [PATCH] riscv: add support for static PIE

[Andreas Schwab <schwab@suse.de>]

On Jan 22 2024, Adhemerval Zanella Netto wrote:

> On 22/01/24 06:35, Andreas Schwab wrote:
>> On Jan 18 2024, Adhemerval Zanella Netto wrote:
>> 
>>> Otherwise the startup code will trigger an invalid memory access (since the
>>> stack protector is not yet initialized):
>>>
>>> $ gdb ./elf/ldconfig
>>> [...]
>>> (gdb) r
>>> [...]
>>> (gdb) disas
>>> Dump of assembler code for function memset:
>>>    0x00007ffff7f6e3ec <+0>:     addi    sp,sp,-32
>>>    0x00007ffff7f6e3ee <+2>:     auipc   a7,0x89
>>>    0x00007ffff7f6e3f2 <+6>:     ld      a7,2018(a7) # 0x7ffff7ff7bd0
>>> => 0x00007ffff7f6e3f6 <+10>:    ld      a5,0(a7)
>> 
>> I don't see that with -fstack-protector-strong.
>> 
>
> It happens with -fstack-protector-all, which although it does not make much
> sense to be used it is still supported.

I think it can be part of a separate commit.  Care to provide one?

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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"And now for something completely different."