4
0
mirror of git://sourceware.org/git/newlib-cygwin.git synced 2025-01-19 12:59:21 +08:00
Tamar Christina 430b529111 Fix AArch32 semihosting SYS_EXIT call on semihosting v1.
The current SYS_EXIT has a bug that when making the call it always uses
the v2 calling convention.  This is undefined behavior according to the
semihosting specification:
https://developer.arm.com/docs/100863/latest/semihosting-operations/sys_exit-0x18

This patch fixes it by making sure v1 passes the argument directly in the register instead
of in a block. And for v2 it does the same if the v2 extension isn't supported.

The sequence generated now is

   12424:       ebfffecd        bl      11f60 <_has_ext_exit_extended>
   12428:       e3500000        cmp     r0, #0
   1242c:       11a0500d        movne   r5, sp
   12430:       059d5000        ldreq   r5, [sp]
   12434:       e1a00004        mov     r0, r4
   12438:       e1a01005        mov     r1, r5
   1243c:       ef00f000        svc     0x0000f000

Signed-off-by: Tamar Christina <tamar.christina@arm.com>
2018-07-11 17:18:04 +02:00
2016-06-23 15:54:55 -04:00
2016-06-23 15:54:55 -04:00
2015-03-09 20:53:11 +01:00
2016-06-23 15:54:55 -04:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2018-07-06 10:46:43 +02:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2010-01-09 21:11:32 +00:00
2014-02-05 13:17:47 +00:00
2010-01-09 21:11:32 +00:00
2010-01-09 21:11:32 +00:00
2016-06-23 15:54:55 -04:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00
2016-03-22 10:25:20 +01:00

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.
Description
No description provided
Readme 153 MiB
Languages
C 61.5%
Makefile 19.6%
C++ 10.4%
Assembly 4.9%
M4 1%
Other 2.4%