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authorVitaly Kuzmichev <vkuzmichev@mvista.com>2010-06-15 22:18:11 +0400
committerWolfgang Denk <wd@denx.de>2010-06-22 22:15:07 +0200
commita71da1b6c96205549ca2e7cf991e2340181bbfcf (patch)
tree4956c3b08860ad3467ac68d51ec2d2c1f190ab6d /arch/arm
parent96b35730a43160afa025ac405961737dbb0682b4 (diff)
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ARM: Align stack to 8 bytes
The ARM ABI requires that the stack be aligned to 8 bytes as it is noted in Procedure Call Standard for the ARM Architecture: http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042d/index.html Unaligned SP also causes the problem with variable-length arrays allocation when VLA address becomes less than stack pointer during aligning of this address, so the next 'push' in the stack overwrites first 4 bytes of VLA. Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com> Tested on tx25(mx25), imx27lite(mx27), qong(mx31) and trab(s3c2400) Tested-by: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/cpu/arm1136/start.S1
-rw-r--r--arch/arm/cpu/arm1176/start.S1
-rw-r--r--arch/arm/cpu/arm720t/start.S1
-rw-r--r--arch/arm/cpu/arm920t/start.S1
-rw-r--r--arch/arm/cpu/arm925t/start.S1
-rw-r--r--arch/arm/cpu/arm926ejs/start.S2
-rw-r--r--arch/arm/cpu/arm946es/start.S1
-rw-r--r--arch/arm/cpu/arm_cortexa8/start.S2
-rw-r--r--arch/arm/cpu/arm_intcm/start.S1
-rw-r--r--arch/arm/cpu/ixp/start.S1
-rw-r--r--arch/arm/cpu/lh7a40x/start.S1
-rw-r--r--arch/arm/cpu/pxa/start.S6
-rw-r--r--arch/arm/cpu/s3c44b0/start.S1
-rw-r--r--arch/arm/cpu/sa1100/start.S1
14 files changed, 15 insertions, 6 deletions
diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S
index 922d01c..41eb82d 100644
--- a/arch/arm/cpu/arm1136/start.S
+++ b/arch/arm/cpu/arm1136/start.S
@@ -185,6 +185,7 @@ stack_setup:
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
#endif /* CONFIG_PRELOADER */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
index a540edb..f98a7aa 100644
--- a/arch/arm/cpu/arm1176/start.S
+++ b/arch/arm/cpu/arm1176/start.S
@@ -276,6 +276,7 @@ stack_setup:
sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */
sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo */
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/arm720t/start.S b/arch/arm/cpu/arm720t/start.S
index 022b873..d6f2c16 100644
--- a/arch/arm/cpu/arm720t/start.S
+++ b/arch/arm/cpu/arm720t/start.S
@@ -172,6 +172,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/arm920t/start.S b/arch/arm/cpu/arm920t/start.S
index 779f192..e532f55 100644
--- a/arch/arm/cpu/arm920t/start.S
+++ b/arch/arm/cpu/arm920t/start.S
@@ -204,6 +204,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/arm925t/start.S b/arch/arm/cpu/arm925t/start.S
index 567e804..346615e 100644
--- a/arch/arm/cpu/arm925t/start.S
+++ b/arch/arm/cpu/arm925t/start.S
@@ -196,6 +196,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index 3b81151..cf40ce1 100644
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -196,7 +196,7 @@ stack_setup:
#endif
#endif /* CONFIG_PRELOADER */
sub sp, r0, #12 /* leave 3 words for abort-stack */
- bic sp, r0, #7 /* 8-byte align stack for ABI compliance */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/arm946es/start.S b/arch/arm/cpu/arm946es/start.S
index 627e3cb..8844d44 100644
--- a/arch/arm/cpu/arm946es/start.S
+++ b/arch/arm/cpu/arm946es/start.S
@@ -163,6 +163,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/arm_cortexa8/start.S b/arch/arm/cpu/arm_cortexa8/start.S
index 29dae2f..1e0a150 100644
--- a/arch/arm/cpu/arm_cortexa8/start.S
+++ b/arch/arm/cpu/arm_cortexa8/start.S
@@ -164,7 +164,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 @ leave 3 words for abort-stack
- and sp, sp, #~7 @ 8 byte alinged for (ldr/str)d
+ bic sp, sp, #7 @ 8-byte alignment for ABI compliance
/* Clear BSS (if any). Is below tx (watch load addr - need space) */
clear_bss:
diff --git a/arch/arm/cpu/arm_intcm/start.S b/arch/arm/cpu/arm_intcm/start.S
index bb1f003..328bae0 100644
--- a/arch/arm/cpu/arm_intcm/start.S
+++ b/arch/arm/cpu/arm_intcm/start.S
@@ -161,6 +161,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S
index 5ebce53..6efe333 100644
--- a/arch/arm/cpu/ixp/start.S
+++ b/arch/arm/cpu/ixp/start.S
@@ -289,6 +289,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/lh7a40x/start.S b/arch/arm/cpu/lh7a40x/start.S
index a1321b1..14a1fbe 100644
--- a/arch/arm/cpu/lh7a40x/start.S
+++ b/arch/arm/cpu/lh7a40x/start.S
@@ -178,6 +178,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S
index 3989fa6..e07c8c2 100644
--- a/arch/arm/cpu/pxa/start.S
+++ b/arch/arm/cpu/pxa/start.S
@@ -140,10 +140,8 @@ stack_setup:
#ifdef CONFIG_USE_IRQ
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif /* CONFIG_USE_IRQ */
- sub r0, r0, #12 /* leave 3 words for abort-stack */
- bic sp, r0, #7 /* NOTE: stack MUST be aligned to */
- /* 8 bytes in case we want to use */
- /* 64bit datatypes (eg. VSPRINTF64) */
+ sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
diff --git a/arch/arm/cpu/s3c44b0/start.S b/arch/arm/cpu/s3c44b0/start.S
index f5a3d3a..0063063 100644
--- a/arch/arm/cpu/s3c44b0/start.S
+++ b/arch/arm/cpu/s3c44b0/start.S
@@ -163,6 +163,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
ldr pc, _start_armboot
diff --git a/arch/arm/cpu/sa1100/start.S b/arch/arm/cpu/sa1100/start.S
index 278c500..deb4745 100644
--- a/arch/arm/cpu/sa1100/start.S
+++ b/arch/arm/cpu/sa1100/start.S
@@ -153,6 +153,7 @@ stack_setup:
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
clear_bss:
ldr r0, _bss_start /* find start of bss segment */
generated by cgit v1.1 at 2024-12-28 03:00:31 +0000