From 2607bee41906da4f47d98a92749c11533396838c Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sun, 29 Jan 2006 21:02:08 +0000
Subject: Patch by Joseph S. Myers to add support for ARM EABI

---
 libc/sysdeps/linux/arm/mmap64.S | 34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

(limited to 'libc/sysdeps/linux/arm/mmap64.S')

diff --git a/libc/sysdeps/linux/arm/mmap64.S b/libc/sysdeps/linux/arm/mmap64.S
index 784d73440..d0be0380e 100644
--- a/libc/sysdeps/linux/arm/mmap64.S
+++ b/libc/sysdeps/linux/arm/mmap64.S
@@ -29,6 +29,36 @@
 .type mmap64,%function
 .align 4
 mmap64:
+
+#ifdef __ARM_EABI__
+#ifdef __ARMEB__
+# define LOW_OFFSET      8 + 4
+/* The initial + 4 is for the stack postdecrement.  */
+# define HIGH_OFFSET 4 + 8 + 0
+#else
+# define LOW_OFFSET      8 + 0
+# define HIGH_OFFSET 4 + 8 + 4
+#endif
+	ldr	ip, [sp, $LOW_OFFSET]
+	str	r5, [sp, #-4]!
+	ldr	r5, [sp, $HIGH_OFFSET]
+	str	r4, [sp, #-4]!
+	movs	r4, ip, lsl $20		@ check that offset is page-aligned
+	mov	ip, ip, lsr $12
+	moveqs	r4, r5, lsr $12		@ check for overflow
+	bne	.Linval
+	ldr	r4, [sp, $8]		@ load fd
+	orr	r5, ip, r5, lsl $20	@ compose page offset
+	DO_CALL (mmap2)
+	cmn	r0, $4096
+	ldmfd	sp!, {r4, r5}
+	movcc	pc, lr
+	b	__syscall_error
+.Linval:
+	mov	r0, $-EINVAL
+	ldmfd	sp!, {r4, r5}
+	b	__syscall_error
+#else
 	stmfd	sp!, {r4, r5, lr}
 	ldr	r5, [sp, $16]
 	ldr	r4, [sp, $12]
@@ -40,7 +70,7 @@ mmap64:
 	movs	ip, ip, lsr $12
 	bne	.Linval			@ check for overflow
 	mov	ip, r0
-	swi	__NR_mmap2
+	DO_CALL (mmap2)
 	cmn	r0, $4096
 	ldmccfd	sp!, {r4, r5, pc}
 	cmn	r0, $ENOSYS
@@ -60,7 +90,7 @@ mmap64:
 
 __error:
 	b	__syscall_error
-
+#endif
 .size mmap64,.-mmap64
 
 #endif
-- 
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