arm: Add IT insns for thumb mode

These are ignored by the assembler in ARM mode, so by
default this has no effect on generated code.

10 files changed, 29 insertions, 11 deletions

diff --git a/ports/ChangeLog.arm b/ports/ChangeLog.arm
index fe0fd46803..33a1f57f71 100644
--- a/ports/ChangeLog.arm
+++ b/ports/ChangeLog.arm
@@ -26,6 +26,17 @@
 	* sysdeps/unix/sysv/linux/arm/nptl/unwind-resume.c
 	(_Unwind_Resume): Likewise.
 
+	* ports/sysdeps/arm/arm-mcount.S: Always use unified syntax and
+	always add IT markup.
+	* sysdeps/unix/sysv/linux/arm/mmap64.S (__mmap64): Likewise.
+	* sysdeps/arm/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Add IT markup.
+	* sysdeps/unix/arm/sysdep.S (__syscall_error): Likewise.
+	* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Likewise.
+	* sysdeps/unix/sysv/linux/arm/mmap.S (__mmap): Likewise.
+	* sysdeps/unix/sysv/linux/arm/syscall.S (syscall): Likewise.
+	* sysdeps/unix/sysv/linux/arm/sysdep.h (PSEUDO_RET): Likewise.
+	* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Likewise.
+
 2013-02-27  Roland McGrath  <roland@hack.frob.com>
 
 	* sysdeps/arm/sysdep.h (CFI_SECTIONS): New macro.
diff --git a/ports/sysdeps/arm/arm-mcount.S b/ports/sysdeps/arm/arm-mcount.S
index 6c24271396..679d042ba4 100644
--- a/ports/sysdeps/arm/arm-mcount.S
+++ b/ports/sysdeps/arm/arm-mcount.S
@@ -24,8 +24,8 @@
 
 #ifdef __thumb2__
 	.thumb
-	.syntax unified
 #endif
+	.syntax unified
 
 
 /* Use an assembly stub with a special ABI.  The calling lr has been
@@ -77,15 +77,10 @@ ENTRY(_mcount)
 	cfi_rel_offset (r3, 12)
 	cfi_rel_offset (fp, 16)
 	cfi_rel_offset (lr, 20)
-#ifdef __thumb2__
 	movs r0, fp
 	ittt ne
 	ldrne r0, [r0, #-4]
-#else
-	movs fp, fp
-	ldrne r0, [fp, #-4]
-#endif
-	movnes r1, lr
+	movsne r1, lr
 	blne __mcount_internal
 #ifdef __thumb2__
 	ldmia sp!, {r0, r1, r2, r3, fp, pc}
diff --git a/ports/sysdeps/arm/dl-tlsdesc.S b/ports/sysdeps/arm/dl-tlsdesc.S
index 66759923b0..7b4c8dfcb5 100644
--- a/ports/sysdeps/arm/dl-tlsdesc.S
+++ b/ports/sysdeps/arm/dl-tlsdesc.S
@@ -116,6 +116,7 @@ _dl_tlsdesc_dynamic:
 	ldr	r3, [r1]
 	ldr	r2, [r0, r3, lsl #3]
 	cmn	r2, #1
+	ittt	ne
 	ldrne	r3, [r1, #4]
 	addne	r3, r2, r3
 	rsbne	r0, r4, r3
diff --git a/ports/sysdeps/unix/arm/sysdep.S b/ports/sysdeps/unix/arm/sysdep.S
index 99bca9fab1..40e4d80eca 100644
--- a/ports/sysdeps/unix/arm/sysdep.S
+++ b/ports/sysdeps/unix/arm/sysdep.S
@@ -31,8 +31,9 @@ __syscall_error:
 	/* We translate the system's EWOULDBLOCK error into EAGAIN.
 	   The GNU C library always defines EWOULDBLOCK==EAGAIN.
 	   EWOULDBLOCK_sys is the original number.  */
-	cmp r0, $EWOULDBLOCK_sys /* Is it the old EWOULDBLOCK?  */
-	moveq r0, $EAGAIN	/* Yes; translate it to EAGAIN.  */
+	cmp	r0, $EWOULDBLOCK_sys /* Is it the old EWOULDBLOCK?  */
+	it	eq
+	moveq	r0, $EAGAIN	/* Yes; translate it to EAGAIN.  */
 #endif
 
 #ifndef IS_IN_rtld
diff --git a/ports/sysdeps/unix/sysv/linux/arm/clone.S b/ports/sysdeps/unix/sysv/linux/arm/clone.S
index de25db1609..732a3ffd01 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/clone.S
+++ b/ports/sysdeps/unix/sysv/linux/arm/clone.S
@@ -33,6 +33,7 @@
 ENTRY(__clone)
 	@ sanity check args
 	cmp	r0, #0
+	ite	ne
 	cmpne	r1, #0
 	moveq	r0, #-EINVAL
 	beq	PLTJMP(syscall_error)
@@ -78,8 +79,9 @@ PSEUDO_END (__clone)
 	sub	pc, r0, #31
 	mov	r1, r0
 	tst	ip, #CLONE_VM
-	movne	r0, #-1
 	ldr	r7, =SYS_ify(getpid)
+	ite	ne
+	movne	r0, #-1
 	swieq	0x0
 	str	r0, [r1, #PID_OFFSET]
 	str	r0, [r1, #TID_OFFSET]
diff --git a/ports/sysdeps/unix/sysv/linux/arm/mmap.S b/ports/sysdeps/unix/sysv/linux/arm/mmap.S
index fa8a2b86c8..68560b065e 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/mmap.S
+++ b/ports/sysdeps/unix/sysv/linux/arm/mmap.S
@@ -51,6 +51,7 @@ ENTRY (__mmap)
 	cfi_restore (r5)
 
 	cmn	r0, $4096
+	it	cc
 	RETINSTR(cc, lr)
 	b	PLTJMP(syscall_error)
 
diff --git a/ports/sysdeps/unix/sysv/linux/arm/mmap64.S b/ports/sysdeps/unix/sysv/linux/arm/mmap64.S
index 2eafd1b413..dcbab3aed6 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/mmap64.S
+++ b/ports/sysdeps/unix/sysv/linux/arm/mmap64.S
@@ -17,6 +17,8 @@
 
 #include <sysdep.h>
 
+	.syntax unified
+
 #define	EINVAL		22
 
 #ifdef __ARMEB__
@@ -42,7 +44,8 @@ ENTRY (__mmap64)
 	cfi_remember_state
 	movs	r4, ip, lsl $20		@ check that offset is page-aligned
 	mov	ip, ip, lsr $12
-	moveqs	r4, r5, lsr $12		@ check for overflow
+	it	eq
+	movseq	r4, r5, lsr $12		@ check for overflow
 	bne	.Linval
 	ldr	r4, [sp, $8]		@ load fd
 	orr	r5, ip, r5, lsl $20	@ compose page offset
@@ -52,6 +55,7 @@ ENTRY (__mmap64)
 	cfi_adjust_cfa_offset (-8)
 	cfi_restore (r4)
 	cfi_restore (r5)
+	it	cc
 	RETINSTR(cc, lr)
 	b	PLTJMP(syscall_error)
 
diff --git a/ports/sysdeps/unix/sysv/linux/arm/syscall.S b/ports/sysdeps/unix/sysv/linux/arm/syscall.S
index c6dd57d698..665ecb4de0 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/syscall.S
+++ b/ports/sysdeps/unix/sysv/linux/arm/syscall.S
@@ -42,6 +42,7 @@ ENTRY (syscall)
 	cfi_restore (r6)
 	cfi_restore (r7)
 	cmn	r0, #4096
+	it	cc
 	RETINSTR(cc, lr)
 	b	PLTJMP(syscall_error)
 PSEUDO_END (syscall)
diff --git a/ports/sysdeps/unix/sysv/linux/arm/sysdep.h b/ports/sysdeps/unix/sysv/linux/arm/sysdep.h
index f9b3443c14..f40cb95e87 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/sysdep.h
+++ b/ports/sysdeps/unix/sysv/linux/arm/sysdep.h
@@ -64,6 +64,7 @@
 	cmn	r0, $4096;
 
 #define PSEUDO_RET					\
+	it	cc;					\
 	RETINSTR(cc, lr);				\
 	b	PLTJMP(SYSCALL_ERROR)
 #undef ret
diff --git a/ports/sysdeps/unix/sysv/linux/arm/vfork.S b/ports/sysdeps/unix/sysv/linux/arm/vfork.S
index 4f84c57f22..ae931f79c6 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/vfork.S
+++ b/ports/sysdeps/unix/sysv/linux/arm/vfork.S
@@ -51,6 +51,7 @@ ENTRY (__vfork)
 	RESTORE_PID
 #endif
 	cmn	a1, #4096
+	it	cc
 	RETINSTR(cc, lr)
 
 	b	PLTJMP(SYSCALL_ERROR)