[PATCH v2, resend] arm: properly range check immediate operands of VSHL and VQSHL

["Jan Beulich" <JBeulich at suse dot com>]

These two, other than VQSHLU, didn't have their immediates properly range
checked so far.

(Re-sending unchanged from the original v2 due to never having got an
answer to https://sourceware.org/ml/binutils/2013-04/msg00121.html.)

gas/
2015-01-08  Jan Beulich <jbeulich@suse.com>

	* gas/config/tc-arm.c (do_neon_shl_imm): Check immediate range.
	(do_neon_qshl_imm): Likewise.

gas/testsuite/
2015-01-08  Jan Beulich <jbeulich@suse.com>

	* gas/arm/neon-addressing-bad.s: Add test for invalid VSHL,
	VQSHL, and VQSHLU immediates.
	* gas/arm/neon-addressing-bad.l: Update accordingly. 

--- 2015-01-08/gas/config/tc-arm.c	2015-01-07 09:38:02.000000000 +0100
+++ 2015-01-08/gas/config/tc-arm.c	2015-01-08 12:45:59.000000000 +0100
@@ -14102,8 +14102,12 @@ do_neon_shl_imm (void)
     {
       enum neon_shape rs = neon_select_shape (NS_DDI, NS_QQI, NS_NULL);
       struct neon_type_el et = neon_check_type (2, rs, N_EQK, N_KEY | N_I_ALL);
+      int imm = inst.operands[2].imm;
+
+      constraint (imm < 0 || (unsigned)imm >= et.size,
+		  _("immediate out of range for shift"));
       NEON_ENCODE (IMMED, inst);
-      neon_imm_shift (FALSE, 0, neon_quad (rs), et, inst.operands[2].imm);
+      neon_imm_shift (FALSE, 0, neon_quad (rs), et, imm);
     }
   else
     {
@@ -14134,10 +14138,12 @@ do_neon_qshl_imm (void)
     {
       enum neon_shape rs = neon_select_shape (NS_DDI, NS_QQI, NS_NULL);
       struct neon_type_el et = neon_check_type (2, rs, N_EQK, N_SU_ALL | N_KEY);
+      int imm = inst.operands[2].imm;
 
+      constraint (imm < 0 || (unsigned)imm >= et.size,
+		  _("immediate out of range for shift"));
       NEON_ENCODE (IMMED, inst);
-      neon_imm_shift (TRUE, et.type == NT_unsigned, neon_quad (rs), et,
-		      inst.operands[2].imm);
+      neon_imm_shift (TRUE, et.type == NT_unsigned, neon_quad (rs), et, imm);
     }
   else
     {
--- 2015-01-08/gas/testsuite/gas/arm/neon-addressing-bad.l	2013-10-04 10:37:17.000000000 +0200
+++ 2015-01-08/gas/testsuite/gas/arm/neon-addressing-bad.l	2015-01-08 12:45:59.000000000 +0100
@@ -25,3 +25,15 @@
 [^:]*:29: Error: r15 not allowed here -- `vst1.8 {Q1},R0'
 [^:]*:30: Error: r15 not allowed here -- `vst1.8 {D0},\[PC\]'
 [^:]*:31: Error: r15 not allowed here -- `vst1.8 {D0},\[PC,#0\]'
+[^:]*:34: Error: immediate out of range for shift -- `vshl.i8 d0,d0,#8'
+[^:]*:36: Error: immediate out of range for shift -- `vshl.i16 d0,d0,#16'
+[^:]*:38: Error: immediate out of range for shift -- `vshl.i32 d0,d0,#32'
+[^:]*:40: Error: .* -- `vshl.i64 d0,d0,#64'
+[^:]*:43: Error: immediate out of range for shift -- `vqshl.s8 d0,d0,#8'
+[^:]*:45: Error: immediate out of range for shift -- `vqshl.s16 d0,d0,#16'
+[^:]*:47: Error: immediate out of range for shift -- `vqshl.s32 d0,d0,#32'
+[^:]*:49: Error: .* -- `vqshl.s64 d0,d0,#64'
+[^:]*:52: Error: immediate out of range for shift -- `vqshlu.s8 d0,d0,#8'
+[^:]*:54: Error: immediate out of range for shift -- `vqshlu.s16 d0,d0,#16'
+[^:]*:56: Error: immediate out of range for shift -- `vqshlu.s32 d0,d0,#32'
+[^:]*:58: Error: .* -- `vqshlu.s64 d0,d0,#64'
--- 2015-01-08/gas/testsuite/gas/arm/neon-addressing-bad.s	2013-10-04 10:37:17.000000000 +0200
+++ 2015-01-08/gas/testsuite/gas/arm/neon-addressing-bad.s	2015-01-08 12:45:59.000000000 +0100
@@ -29,3 +29,30 @@ VST1.8 {D0}, R0
 VST1.8 {Q1}, R0
 VST1.8 {D0}, [PC]
 VST1.8 {D0}, [PC, #0]
+
+VSHL.I8		d0, d0, #7
+VSHL.I8		d0, d0, #8
+VSHL.I16	d0, d0, #15
+VSHL.I16	d0, d0, #16
+VSHL.I32	d0, d0, #31
+VSHL.I32	d0, d0, #32
+VSHL.I64	d0, d0, #63
+VSHL.I64	d0, d0, #64
+
+VQSHL.S8	d0, d0, #7
+VQSHL.S8	d0, d0, #8
+VQSHL.S16	d0, d0, #15
+VQSHL.S16	d0, d0, #16
+VQSHL.S32	d0, d0, #31
+VQSHL.S32	d0, d0, #32
+VQSHL.S64	d0, d0, #63
+VQSHL.S64	d0, d0, #64
+
+VQSHLU.S8	d0, d0, #7
+VQSHLU.S8	d0, d0, #8
+VQSHLU.S16	d0, d0, #15
+VQSHLU.S16	d0, d0, #16
+VQSHLU.S32	d0, d0, #31
+VQSHLU.S32	d0, d0, #32
+VQSHLU.S64	d0, d0, #63
+VQSHLU.S64	d0, d0, #64

Attachment: binutils-master-arm-vshift-immediate.patch
Description: Text document