[PATCH v2 0/2] Introduce asinfo tool

[Dmitry V. Levin]

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 - for system calls shared between oabi and eabi (may 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.


-- 
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