diff mbox

[04/27,AARCH64] Add PTR_REG, PTR_LOG_SIZE, and PTR_SIZE. Use it in LDST_PCREL and LDST_GLOBAL.

Message ID 1466485631-3532-6-git-send-email-ynorov@caviumnetworks.com
State New, archived
Headers

Commit Message

Yury Norov June 21, 2016, 5:06 a.m. UTC 
  From: Andrew Pinski <apinski@cavium.com>

This patch adds a few extra macros which are useful for ILP32 and updates
PTR_MANGLE and PTR_DEMANGLE to use the some of the new macros.

* sysdeps/aarch64/sysdep.h (PTR_REG): New macro.
(PTR_LOG_SIZE): New macro.
(PTR_SIZE): New macro.
(LDST_PCREL): Use arguments as register numbers rather register names.
Use PTR_REG for the register when loading.
* sysdeps/unix/sysv/linux/aarch64/sysdep.h (PTR_MANGLE): Add a comment
about that the arguments are register numbers rather register names.
(PTR_DEMANGLE): Likewise.
* sysdeps/aarch64/__longjmp.S (__longjmp): Update calls to PTR_DEMANGLE.
* sysdeps/aarch64/setjmp.S (__sigsetjmp): Update calls to PTR_MANGLE.

Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
---
 sysdeps/aarch64/__longjmp.S              |  4 ++--
 sysdeps/aarch64/setjmp.S                 |  4 ++--
 sysdeps/aarch64/sysdep.h                 | 28 ++++++++++++++++++----------
 sysdeps/unix/sysv/linux/aarch64/sysdep.h |  8 ++++++--
 4 files changed, 28 insertions(+), 16 deletions(-)

Comments

Andreas Schwab June 21, 2016, 7:54 a.m. UTC | #1 
Yury Norov <ynorov@caviumnetworks.com> writes:

> diff --git a/sysdeps/aarch64/sysdep.h b/sysdeps/aarch64/sysdep.h
> index 4cb028f..f2ea821 100644
> --- a/sysdeps/aarch64/sysdep.h
> +++ b/sysdeps/aarch64/sysdep.h
> @@ -23,10 +23,16 @@
>  
>  #ifdef __LP64__
>  #define AARCH64_R(NAME)		R_AARCH64_ ## NAME
> +#define PTR_REG(n)	x##n
> +#define PTR_LOG_SIZE	3
>  #else
>  #define AARCH64_R(NAME)		R_AARCH64_P32_ ## NAME
> +#define PTR_REG(n)	w##n
> +#define PTR_LOG_SIZE	2
>  #endif
>  
> +#define PTR_SIZE	(1<<PTR_LOG_SIZE)
> +
>  #ifdef	__ASSEMBLER__
>  
>  /* Syntactic details of assembler.  */
> @@ -87,16 +93,18 @@
>  # define L(name)         .L##name
>  #endif
>  
> -/* Load or store to/from a pc-relative EXPR into/from R, using T.  */
> -#define LDST_PCREL(OP, R, T, EXPR)  \
> -	adrp	T, EXPR;	    \
> -	OP	R, [T, #:lo12:EXPR];\
> -
> -/* Load or store to/from a got-relative EXPR into/from R, using T.  */
> -#define LDST_GLOBAL(OP, R, T, EXPR)     \
> -	adrp	T, :got:EXPR;		\
> -	ldr	T, [T, #:got_lo12:EXPR];\
> -	OP	R, [T];
> +/* Load or store to/from a pc-relative EXPR into/from R, using T.
> +   Note R and T are register numbers and not register names.  */
> +#define LDST_PCREL(OP, R, T, EXPR)			\
> +	adrp	x##T, EXPR;				\
> +	OP	PTR_REG (R), [x##T, #:lo12:EXPR];	\
> +
> +/* Load or store to/from a got-relative EXPR into/from R, using T.
> +   Note R and T are register numbers and not register names.  */
> +#define LDST_GLOBAL(OP, R, T,  EXPR)			\
> +	adrp	x##T, :got:EXPR;			\
> +	ldr	PTR_REG (T), [x##T, #:got_lo12:EXPR];	\
> +	OP	x##R, [x##T];

I think this needs to be PTR_REG(x).

Andreas.
Yury Norov June 21, 2016, 8:36 a.m. UTC | #2 
On Tue, Jun 21, 2016 at 09:54:47AM +0200, Andreas Schwab wrote:
> Yury Norov <ynorov@caviumnetworks.com> writes:
> 
> > diff --git a/sysdeps/aarch64/sysdep.h b/sysdeps/aarch64/sysdep.h
> > index 4cb028f..f2ea821 100644
> > --- a/sysdeps/aarch64/sysdep.h
> > +++ b/sysdeps/aarch64/sysdep.h
> > @@ -23,10 +23,16 @@
> >  
> >  #ifdef __LP64__
> >  #define AARCH64_R(NAME)		R_AARCH64_ ## NAME
> > +#define PTR_REG(n)	x##n
> > +#define PTR_LOG_SIZE	3
> >  #else
> >  #define AARCH64_R(NAME)		R_AARCH64_P32_ ## NAME
> > +#define PTR_REG(n)	w##n
> > +#define PTR_LOG_SIZE	2
> >  #endif
> >  
> > +#define PTR_SIZE	(1<<PTR_LOG_SIZE)
> > +
> >  #ifdef	__ASSEMBLER__
> >  
> >  /* Syntactic details of assembler.  */
> > @@ -87,16 +93,18 @@
> >  # define L(name)         .L##name
> >  #endif
> >  
> > -/* Load or store to/from a pc-relative EXPR into/from R, using T.  */
> > -#define LDST_PCREL(OP, R, T, EXPR)  \
> > -	adrp	T, EXPR;	    \
> > -	OP	R, [T, #:lo12:EXPR];\
> > -
> > -/* Load or store to/from a got-relative EXPR into/from R, using T.  */
> > -#define LDST_GLOBAL(OP, R, T, EXPR)     \
> > -	adrp	T, :got:EXPR;		\
> > -	ldr	T, [T, #:got_lo12:EXPR];\
> > -	OP	R, [T];
> > +/* Load or store to/from a pc-relative EXPR into/from R, using T.
> > +   Note R and T are register numbers and not register names.  */
> > +#define LDST_PCREL(OP, R, T, EXPR)			\
> > +	adrp	x##T, EXPR;				\
> > +	OP	PTR_REG (R), [x##T, #:lo12:EXPR];	\
> > +
> > +/* Load or store to/from a got-relative EXPR into/from R, using T.
> > +   Note R and T are register numbers and not register names.  */
> > +#define LDST_GLOBAL(OP, R, T,  EXPR)			\
> > +	adrp	x##T, :got:EXPR;			\
> > +	ldr	PTR_REG (T), [x##T, #:got_lo12:EXPR];	\
> > +	OP	x##R, [x##T];
> 
> I think this needs to be PTR_REG(x).
> 
> Andreas.

Hi Andreas,

Thanks a lot for review. I will handle your comments and send new
version soon, maybe tomorrow.
Andreas Schwab June 21, 2016, 9:13 a.m. UTC | #3 
Andreas Schwab <schwab@suse.de> writes:

>> +/* Load or store to/from a got-relative EXPR into/from R, using T.
>> +   Note R and T are register numbers and not register names.  */
>> +#define LDST_GLOBAL(OP, R, T,  EXPR)			\
>> +	adrp	x##T, :got:EXPR;			\
>> +	ldr	PTR_REG (T), [x##T, #:got_lo12:EXPR];	\
>> +	OP	x##R, [x##T];
>
> I think this needs to be PTR_REG(x).

I mean PTR_REG(R), of course.

Andreas.
diff mbox

Patch

diff --git a/sysdeps/aarch64/__longjmp.S b/sysdeps/aarch64/__longjmp.S
index 65116be..58332be 100644
--- a/sysdeps/aarch64/__longjmp.S
+++ b/sysdeps/aarch64/__longjmp.S
@@ -53,7 +53,7 @@  ENTRY (__longjmp)
 	ldp	x27, x28, [x0, #JB_X27<<3]
 #ifdef PTR_DEMANGLE
 	ldp	x29,  x4, [x0, #JB_X29<<3]
-	PTR_DEMANGLE (x30, x4, x3, x2)
+	PTR_DEMANGLE (30, 4, 3, 2)
 #else
 	ldp	x29, x30, [x0, #JB_X29<<3]
 #endif
@@ -98,7 +98,7 @@  ENTRY (__longjmp)
 	cfi_same_value(d15)
 #ifdef PTR_DEMANGLE
 	ldr	x4, [x0, #JB_SP<<3]
-	PTR_DEMANGLE (x5, x4, x3, x2)
+	PTR_DEMANGLE (5, 4, 3, 2)
 #else
 	ldr	x5, [x0, #JB_SP<<3]
 #endif
diff --git a/sysdeps/aarch64/setjmp.S b/sysdeps/aarch64/setjmp.S
index 22f4368..da83f19 100644
--- a/sysdeps/aarch64/setjmp.S
+++ b/sysdeps/aarch64/setjmp.S
@@ -42,7 +42,7 @@  ENTRY (__sigsetjmp)
 	stp	x27, x28, [x0, #JB_X27<<3]
 
 #ifdef PTR_MANGLE
-	PTR_MANGLE (x4, x30, x3, x2)
+	PTR_MANGLE (4, 30, 3, 2)
 	stp	x29,  x4, [x0, #JB_X29<<3]
 #else
 	stp	x29, x30, [x0, #JB_X29<<3]
@@ -57,7 +57,7 @@  ENTRY (__sigsetjmp)
 	stp	d14, d15, [x0, #JB_D14<<3]
 #ifdef PTR_MANGLE
 	mov	x4, sp
-	PTR_MANGLE (x5, x4, x3, x2)
+	PTR_MANGLE (5, 4, 3, 2)
 	str	x5, [x0, #JB_SP<<3]
 #else
 	mov	x2,  sp
diff --git a/sysdeps/aarch64/sysdep.h b/sysdeps/aarch64/sysdep.h
index 4cb028f..f2ea821 100644
--- a/sysdeps/aarch64/sysdep.h
+++ b/sysdeps/aarch64/sysdep.h
@@ -23,10 +23,16 @@ 
 
 #ifdef __LP64__
 #define AARCH64_R(NAME)		R_AARCH64_ ## NAME
+#define PTR_REG(n)	x##n
+#define PTR_LOG_SIZE	3
 #else
 #define AARCH64_R(NAME)		R_AARCH64_P32_ ## NAME
+#define PTR_REG(n)	w##n
+#define PTR_LOG_SIZE	2
 #endif
 
+#define PTR_SIZE	(1<<PTR_LOG_SIZE)
+
 #ifdef	__ASSEMBLER__
 
 /* Syntactic details of assembler.  */
@@ -87,16 +93,18 @@ 
 # define L(name)         .L##name
 #endif
 
-/* Load or store to/from a pc-relative EXPR into/from R, using T.  */
-#define LDST_PCREL(OP, R, T, EXPR)  \
-	adrp	T, EXPR;	    \
-	OP	R, [T, #:lo12:EXPR];\
-
-/* Load or store to/from a got-relative EXPR into/from R, using T.  */
-#define LDST_GLOBAL(OP, R, T, EXPR)     \
-	adrp	T, :got:EXPR;		\
-	ldr	T, [T, #:got_lo12:EXPR];\
-	OP	R, [T];
+/* Load or store to/from a pc-relative EXPR into/from R, using T.
+   Note R and T are register numbers and not register names.  */
+#define LDST_PCREL(OP, R, T, EXPR)			\
+	adrp	x##T, EXPR;				\
+	OP	PTR_REG (R), [x##T, #:lo12:EXPR];	\
+
+/* Load or store to/from a got-relative EXPR into/from R, using T.
+   Note R and T are register numbers and not register names.  */
+#define LDST_GLOBAL(OP, R, T,  EXPR)			\
+	adrp	x##T, :got:EXPR;			\
+	ldr	PTR_REG (T), [x##T, #:got_lo12:EXPR];	\
+	OP	x##R, [x##T];
 
 /* Since C identifiers are not normally prefixed with an underscore
    on this system, the asm identifier `syscall_error' intrudes on the
diff --git a/sysdeps/unix/sysv/linux/aarch64/sysdep.h b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
index a397e50..1ffabc2 100644
--- a/sysdeps/unix/sysv/linux/aarch64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
@@ -250,12 +250,14 @@ 
      (!defined SHARED && (IS_IN (libc) \
 			  || IS_IN (libpthread))))
 # ifdef __ASSEMBLER__
+/* Note, dst, src, guard, and tmp are all register numbers rather than
+   register names so they will work with both ILP32 and LP64. */
 #  define PTR_MANGLE(dst, src, guard, tmp)                                \
   LDST_PCREL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard_local)); \
   PTR_MANGLE2 (dst, src, guard)
 /* Use PTR_MANGLE2 for efficiency if guard is already loaded.  */
 #  define PTR_MANGLE2(dst, src, guard)\
-  eor dst, src, guard
+  eor x##dst, x##src, x##guard
 #  define PTR_DEMANGLE(dst, src, guard, tmp)\
   PTR_MANGLE (dst, src, guard, tmp)
 #  define PTR_DEMANGLE2(dst, src, guard)\
@@ -268,12 +270,14 @@  extern uintptr_t __pointer_chk_guard_local attribute_relro attribute_hidden;
 # endif
 #else
 # ifdef __ASSEMBLER__
+/* Note, dst, src, guard, and tmp are all register numbers rather than
+   register names so they will work with both ILP32 and LP64. */
 #  define PTR_MANGLE(dst, src, guard, tmp)                             \
   LDST_GLOBAL (ldr, guard, tmp, C_SYMBOL_NAME(__pointer_chk_guard));   \
   PTR_MANGLE2 (dst, src, guard)
 /* Use PTR_MANGLE2 for efficiency if guard is already loaded.  */
 #  define PTR_MANGLE2(dst, src, guard)\
-  eor dst, src, guard
+  eor x##dst, x##src, x##guard
 #  define PTR_DEMANGLE(dst, src, guard, tmp)\
   PTR_MANGLE (dst, src, guard, tmp)
 #  define PTR_DEMANGLE2(dst, src, guard)\