[PATCH] gdb: Improve syscall entry/return tracking on Linux

[Pedro Alves]

On 10/09/2015 06:57 PM, Josh Stone wrote:
> On 10/09/2015 03:48 AM, Pedro Alves wrote:

>> no-mmu / uclinux systems don't have fork.  I'm not sure whether
>> fork returns ENOSYS or SYS_fork isn't even defined there.
>> Maybe just switch to vfork so we can keep catch syscall
>> coverage on those systems?
> 
> In kernel/fork.c I see that lacking CONFIG_MMU returns EINVAL.
> 
> But it appears a few archs don't implement fork/vfork syscalls at all,
> only clone.  

Ah, yeah.  Even on x86 glibc doesn't really implement fork
with the fork syscall.

> Maybe I should use CLONE_VFORK for broadest coverage?

That does sound the best.

Thanks,
Pedro Alves