[PATCH v2 0/2] Introduce asinfo tool

[Dmitry V. Levin]

On Fri, Jul 28, 2017 at 02:47:23PM +0300, Edgar Kaziakhmedov wrote:
> On Fri, 28 Jul 2017 13:26:41 +0300
> "Dmitry V. Levin" <ldv at altlinux.org> wrote:
> 
> > On Fri, Jul 28, 2017 at 08:33:57AM +0300, Edgar Kaziakhmedov wrote:
> > [...]
> > > Actually, I am not quite sure about ARM architectures, am I right
> > > there or not. (I mean ABI modes). Because, according to the current
> > > syscallent.h file in arm dir, there is not support for subcall in
> > > ARM EABI, is it correct? Because, in the kernel there is place for
> > > these subcalls.  
> > 
> > That's simple.  If you have a look at the kernel, you'll see the
> > following:
> > 
> > $ grep -Fw oabi arch/arm/tools/syscall.tbl
> > # <num>	<abi>	<name>			[<entry
> > point>			[<oabi compat entry point>]] #  common
> > point>	- for system calls shared between oabi and eabi (may
> > point>	have compat)
> > #  oabi   - for oabi-only system calls (may have compat)
> > # For each syscall number, "common" is mutually exclusive with oabi
> > and eabi 13	oabi	time			sys_time
> > 22	oabi	umount			sys_oldumount
> > 25	oabi	stime			sys_stime
> > 27	oabi	alarm			sys_alarm
> > 30	oabi	utime			sys_utime
> > 76	oabi	getrlimit		sys_old_getrlimit
> > 82	oabi	select			sys_old_select
> > 89	oabi	readdir			sys_old_readdir
> > 90	oabi	mmap			sys_old_mmap
> > 102	oabi	socketcall
> > sys_socketcall		sys_oabi_socketcall 113
> > oabi	syscall			sys_syscall 117
> > oabi	ipc			sys_ipc
> > sys_oabi_ipc
> > 
> > In other words, socketcall and ipc are implemented for oabi only,
> > on eabi they return ENOSYS.
> 
> Yes, sure, however, am I right, that syscallent.h will be the same in
> sense of first 398 syscalls for ARM OABI and for ARM EABI?
> I'd say, that it'd be convinient to add #ifdef directive to syscalls,
> that are purposed for just OABI mode, and in case of EABI fill them as
> zero.

Why do you think it would be more convenient if, say, ipc syscall called
on arm eabi would be printed as "syscall_117" rather than "ipc"?


-- 
ldv
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