gcc/gcc/testsuite
H.J. Lu 7799a85590 x86: Add -mindirect-branch=
Add -mindirect-branch= option to convert indirect call and jump to call
and return thunks.  The default is 'keep', which keeps indirect call and
jump unmodified.  'thunk' converts indirect call and jump to call and
return thunk.  'thunk-inline' converts indirect call and jump to inlined
call and return thunk.  'thunk-extern' converts indirect call and jump to
external call and return thunk provided in a separate object file.  You
can control this behavior for a specific function by using the function
attribute indirect_branch.

2 kinds of thunks are geneated.  Memory thunk where the function address
is at the top of the stack:

__x86_indirect_thunk:
	call L2
L1:
	pause
	lfence
	jmp L1
L2:
	lea 8(%rsp), %rsp|lea 4(%esp), %esp
	ret

Indirect jmp via memory, "jmp mem", is converted to

	push memory
	jmp __x86_indirect_thunk

Indirect call via memory, "call mem", is converted to

	jmp L2
L1:
	push [mem]
	jmp __x86_indirect_thunk
L2:
	call L1

Register thunk where the function address is in a register, reg:

__x86_indirect_thunk_reg:
	call	L2
L1:
	pause
	lfence
	jmp	L1
L2:
	movq	%reg, (%rsp)|movl    %reg, (%esp)
	ret

where reg is one of (r|e)ax, (r|e)dx, (r|e)cx, (r|e)bx, (r|e)si, (r|e)di,
(r|e)bp, r8, r9, r10, r11, r12, r13, r14 and r15.

Indirect jmp via register, "jmp reg", is converted to

	jmp __x86_indirect_thunk_reg

Indirect call via register, "call reg", is converted to

	call __x86_indirect_thunk_reg

gcc/

	Backport from mainline
	* config/i386/i386-opts.h (indirect_branch): New.
	* config/i386/i386-protos.h (ix86_output_indirect_jmp): Likewise.
	* config/i386/i386.c (ix86_using_red_zone): Disallow red-zone
	with local indirect jump when converting indirect call and jump.
	(ix86_set_indirect_branch_type): New.
	(ix86_set_current_function): Call ix86_set_indirect_branch_type.
	(indirectlabelno): New.
	(indirect_thunk_needed): Likewise.
	(indirect_thunk_bnd_needed): Likewise.
	(indirect_thunks_used): Likewise.
	(indirect_thunks_bnd_used): Likewise.
	(INDIRECT_LABEL): Likewise.
	(indirect_thunk_name): Likewise.
	(output_indirect_thunk): Likewise.
	(output_indirect_thunk_function): Likewise.
	(ix86_output_indirect_branch_via_reg): Likewise.
	(ix86_output_indirect_branch_via_push): Likewise.
	(ix86_output_indirect_branch): Likewise.
	(ix86_output_indirect_jmp): Likewise.
	(ix86_code_end): Call output_indirect_thunk_function if needed.
	(ix86_output_call_insn): Call ix86_output_indirect_branch if
	needed.
	(ix86_handle_fndecl_attribute): Handle indirect_branch.
	(ix86_attribute_table): Add indirect_branch.
	* config/i386/i386.h (machine_function): Add indirect_branch_type
	and has_local_indirect_jump.
	* config/i386/i386.md (indirect_jump): Set has_local_indirect_jump
	to true.
	(tablejump): Likewise.
	(*indirect_jump): Use ix86_output_indirect_jmp.
	(*tablejump_1): Likewise.
	(simple_return_indirect_internal): Likewise.
	* config/i386/i386.opt (mindirect-branch=): New option.
	(indirect_branch): New.
	(keep): Likewise.
	(thunk): Likewise.
	(thunk-inline): Likewise.
	(thunk-extern): Likewise.
	* doc/extend.texi: Document indirect_branch function attribute.
	* doc/invoke.texi: Document -mindirect-branch= option.

gcc/testsuite/

	Backport from mainline
	* gcc.target/i386/indirect-thunk-1.c: New test.
	* gcc.target/i386/indirect-thunk-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-attr-8.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-bnd-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-extern-7.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-1.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-2.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-3.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-4.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-5.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-6.c: Likewise.
	* gcc.target/i386/indirect-thunk-inline-7.c: Likewise.

From-SVN: r256732
2018-01-16 02:59:42 -08:00
..
ada
brig.dg
c-c++-common re PR c++/83553 (compiler removes body of the for-loop, although there is a case label inside) 2017-12-23 09:43:10 +01:00
config
g++.dg backport: re PR c++/83713 (ICE in do_narrow at gcc/convert.c:474) 2018-01-09 08:53:14 +00:00
g++.old-deja Use relative line number for subsequent dg directives 2017-04-19 06:55:33 +00:00
gcc.c-torture re PR rtl-optimization/83565 (RTL combine pass yields wrong rotate result) 2018-01-12 10:20:42 +00:00
gcc.dg [arm] PR target/82975: Guard against reg_renumber being NULL in arm.h 2018-01-08 18:42:50 +00:00
gcc.misc-tests
gcc.target x86: Add -mindirect-branch= 2018-01-16 02:59:42 -08:00
gcc.test-framework Use relative line number for subsequent dg directives 2017-04-19 06:55:33 +00:00
gfortran.dg backport: re PR libfortran/83811 (fortran 'e' format broken for single digit exponents) 2018-01-14 21:44:50 +00:00
gfortran.fortran-torture S/390: PR80464: Split MEM->GPR vector moves 2017-04-25 11:18:52 +00:00
gnat.dg decl.c (gnat_to_gnu_field): Do not set the alignment of the enclosing record type if it is not already set. 2017-12-14 17:05:43 +00:00
go.dg
go.go-torture/execute
go.test Backport correct Go MIPS architecture names from trunk. 2017-10-09 16:59:38 +00:00
jit.dg
lib Adapt Solaris 12 references 2017-11-21 09:31:12 +00:00
obj-c++.dg Use relative line number for subsequent dg directives 2017-04-19 06:55:33 +00:00
objc
objc-obj-c++-shared
objc.dg Use relative line number for subsequent dg directives 2017-04-19 06:55:33 +00:00
selftests
.gitattributes
ChangeLog x86: Add -mindirect-branch= 2018-01-16 02:59:42 -08:00
ChangeLog-1993-2007
ChangeLog-2008
ChangeLog-2009
ChangeLog-2010
ChangeLog-2011
ChangeLog-2012
ChangeLog-2013
ChangeLog-2014
ChangeLog-2015
ChangeLog-2016
ChangeLog.graphite
ChangeLog.jit
ChangeLog.ptr
ChangeLog.tree-ssa
README
README.compat
README.gcc

README

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

This is a collection of tests for GCC. For further information about
the C testsuite, see README.gcc.

The driver that runs this testsuite is called DejaGnu and you will
need a current DejaGnu snapshot, which is available from
ftp://gcc.gnu.org/pub/gcc/infrastructure, for example.

These tests are included "as is". If any of them fails, do not report
a bug.  Bug reports for DejaGnu can go to bug-dejagnu@gnu.org.
Discussion and comments about this testsuite should be sent to
gcc@gcc.gnu.org; additions and changes to should go to sent to
gcc-patches@gcc.gnu.org.

The entire testsuite is invoked by `make check` at the top level of
the GCC tree. `make check-g++` runs the C++ testsuite only.

STRUCTURE OF THE G++ TESTSUITE

  g++.dg tests:

  All new tests should be placed in an appropriate subdirectory of g++.dg.

  g++.old-deja tests:

  g++.benjamin	Tests by Benjamin Koz
  g++.bob
  g++.brendan	Tests by Brendan Kehoe
  g++.bugs
  g++.eh  	Tests for exception handling
  g++.ext  	Tests for g++ extensions
  g++.gb  	Tests by Gerald Baumgartner
  g++.jason	Tests by Jason Merill
  g++.jeff	Tests by Jeffrey A Law
  g++.martin	Tests by Martin v. Löwis
  g++.mike	Tests by Mike Stump
  g++.niklas	Tests by Niklas Hallqvist
  g++.ns  	Tests for namespaces
  g++.other
  g++.pt  	Tests for templates
  g++.rfg
  g++.robertl	Tests from gcc-bugs@gcc.gnu.org, gathered by Robert Lipe
	
Finally, some random last minute notes by Mike Stump <mrs@cygnus.com>, on
how to run tests (in the GCC 2.7 era):

	runtest --tool g++ --srcdir ./testsuite

where 

	runtest	Is the name used to invoke DejaGnu.   If DejaGnu is not
		install this will be the relative path name for runtest.

	--tool	This tells DejaGnu which tool you are testing. It is
		mainly used to find the testsuite directories for a
		particular tool when several testsuites are in the
		same directory. (like the gcc and g++ testsuites)

	--srcdir This points to the top level of the directory
		containing the sources of the testsuite. This is
		./testsuite if you are in the directory that has the
		testsuite directory.


Copyright (C) 1998-2017 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
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