[PATCH 07/27] [AARCH64] Use PTR_* macros in dl-trampoline.S

Yury Norov
2016-06-21T06:46:28Z

From: Andrew Pinski <apinski@cavium.com>

Use the PTR_* macros in dl-trampoline.S so it can be used for
both ILP32 and LP64. Also add a comment about what was an magic number
(the size of the rela relocation entries).

* sysdeps/aarch64/dl-trampoline.S (ip0l): New define.
(RELA_SIZE): New define.
(_dl_runtime_resolve): Use PTR_REG, PTR_SIZE.
(_dl_runtime_profile): Likewise. Use RELA_SIZE and ip0l.

Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
---
sysdeps/aarch64/dl-trampoline.S | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/sysdeps/aarch64/dl-trampoline.S b/sysdeps/aarch64/dl-trampoline.S
index 947a515..63ef6f7 100644
--- a/sysdeps/aarch64/dl-trampoline.S
+++ b/sysdeps/aarch64/dl-trampoline.S
@@ -22,9 +22,13 @@
#include "dl-link.h"

#define ip0 x16
+#define ip0l PTR_REG (16)
#define ip1 x17
#define lr x30

+/* RELA relocatons are 3 pointers */
+#define RELA_SIZE (PTR_SIZE * 3)
+
.text
.globl _dl_runtime_resolve
.type _dl_runtime_resolve, #function
@@ -79,7 +83,7 @@ _dl_runtime_resolve:
cfi_rel_offset (q1, 80+7*16)

/* Get pointer to linker struct. */
- ldr x0, [ip0, #-8]
+ ldr PTR_REG (0), [ip0, #-PTR_SIZE]

/* Prepare to call _dl_fixup(). */
ldr x1, [sp, 80+8*16] /* Recover &PLTGOT[n] */
@@ -87,7 +91,7 @@ _dl_runtime_resolve:
sub x1, x1, ip0
add x1, x1, x1, lsl #1
lsl x1, x1, #3
- sub x1, x1, #192
+ sub x1, x1, #(RELA_SIZE<<3)
lsr x1, x1, #3

/* Call fixup routine. */
@@ -191,7 +195,7 @@ _dl_runtime_profile:
stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_SP]

/* Get pointer to linker struct. */
- ldr x0, [ip0, #-8]
+ ldr PTR_REG (0), [ip0, #-PTR_SIZE]

/* Prepare to call _dl_profile_fixup(). */
ldr x1, [x29, OFFSET_PLTGOTN] /* Recover &PLTGOT[n] */
@@ -199,7 +203,7 @@ _dl_runtime_profile:
sub x1, x1, ip0
add x1, x1, x1, lsl #1
lsl x1, x1, #3
- sub x1, x1, #192
+ sub x1, x1, #(RELA_SIZE<<3)
lsr x1, x1, #3

stp x0, x1, [x29, #OFFSET_SAVED_CALL_X0]
@@ -210,8 +214,8 @@ _dl_runtime_profile:
add x4, x29, #OFFSET_FS /* address of framesize */
bl _dl_profile_fixup

- ldr ip0, [x29, #OFFSET_FS] /* framesize == 0 */
- cmp ip0, #0
+ ldr ip0l, [x29, #OFFSET_FS] /* framesize == 0 */
+ cmp ip0l, #0
bge 1f
cfi_remember_state

@@ -243,7 +247,7 @@ _dl_runtime_profile:
1:
/* The new frame size is in ip0. */

- sub x1, x29, ip0
+ sub PTR_REG (1), PTR_REG (29), ip0l
and sp, x1, #0xfffffffffffffff0

str x0, [x29, #OFFSET_T1]
--
2.7.4