[PATCH 08/27] [AARCH64] Use PTR_* in start.S

Yury Norov
2016-06-21T05:10:57Z

From: Andrew Pinski <apinski@cavium.com>

To support ILP32 without much sources changes, this changes
sysdeps/aarch64/start.S to use the PTR_* macros which was defined
earlier.

* sysdeps/aarch64/start.S: Include sysdep.h
(_start): Use PTR_REG, PTR_SIZE macros.

Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
---
sysdeps/aarch64/start.S | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/sysdeps/aarch64/start.S b/sysdeps/aarch64/start.S
index efe2474..9198c57 100644
--- a/sysdeps/aarch64/start.S
+++ b/sysdeps/aarch64/start.S
@@ -16,6 +16,8 @@
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */

+#include <sysdep.h>
+
/* This is the canonical entry point, usually the first thing in the text
segment.

@@ -25,7 +27,7 @@

At this entry point, most registers' values are unspecified, except:

- x0 Contains a function pointer to be registered with `atexit'.
+ x0/w0 Contains a function pointer to be registered with `atexit'.
This is how the dynamic linker arranges to have DT_FINI
functions called for shared libraries that have been loaded
before this code runs.
@@ -52,26 +54,26 @@ _start:
mov x5, x0

/* Load argc and a pointer to argv */
- ldr x1, [sp, #0]
- add x2, sp, #8
+ ldr PTR_REG (1), [sp, #0]
+ add x2, sp, #PTR_SIZE

/* Setup stack limit in argument register */
mov x6, sp

#ifdef SHARED
adrp x0, :got:main
- ldr x0, [x0, #:got_lo12:main]
+ ldr PTR_REG (0), [x0, #:got_lo12:main]

adrp x3, :got:__libc_csu_init
- ldr x3, [x3, #:got_lo12:__libc_csu_init]
+ ldr PTR_REG (3), [x3, #:got_lo12:__libc_csu_init]

adrp x4, :got:__libc_csu_fini
- ldr x4, [x4, #:got_lo12:__libc_csu_fini]
+ ldr PTR_REG (4), [x4, #:got_lo12:__libc_csu_fini]
#else
/* Set up the other arguments in registers */
- ldr x0, =main
- ldr x3, =__libc_csu_init
- ldr x4, =__libc_csu_fini
+ ldr PTR_REG (0), =main
+ ldr PTR_REG (3), =__libc_csu_init
+ ldr PTR_REG (4), =__libc_csu_fini
#endif

/* __libc_start_main (main, argc, argv, init, fini, rtld_fini,
--
2.7.4