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authorFurquan Shaikh <furquan@google.com>2014-08-27 21:40:23 -0700
committerPatrick Georgi <pgeorgi@google.com>2015-03-21 13:35:33 +0100
commit02efc9413b076d869da86017eff188741d114991 (patch)
tree0f3ca76d93cf7ed8619777c4a220f75ad1885703 /payloads/libpayload
parent68cb88e0559108e934cfae49531c8f3295b868a3 (diff)
downloadcoreboot-02efc9413b076d869da86017eff188741d114991.tar.xz
libpayload arm64: Initialize exception stack
Initialize exception stack to be able to handle exceptions properly BUG=chrome-os-partner:31634 BRANCH=None TEST=test_exc successfully generates and handles exceptions on ryu Change-Id: I19163fae080b9ac3297a7ffe404446e427bf9a1c Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 99157687c5178c3b3eb79f5589343db1b2b4cc86 Original-Change-Id: I4dc83ff32c1665e22127bf0b1e6d4c6b45c07a4a Original-Signed-off-by: Furquan Shaikh <furquan@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/214608 Original-Tested-by: Furquan Shaikh <furquan@chromium.org> Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org> Reviewed-on: http://review.coreboot.org/8782 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'payloads/libpayload')
-rw-r--r--payloads/libpayload/arch/arm64/head.S19
-rw-r--r--payloads/libpayload/arch/arm64/libpayload.ldscript5
2 files changed, 15 insertions, 9 deletions
diff --git a/payloads/libpayload/arch/arm64/head.S b/payloads/libpayload/arch/arm64/head.S
index 214c5d7253..349dfd43ee 100644
--- a/payloads/libpayload/arch/arm64/head.S
+++ b/payloads/libpayload/arch/arm64/head.S
@@ -38,24 +38,23 @@ ENTRY(_entry)
ldr x1, 1f
str x0, [x1]
- /* TODO: disable interrupts */
+ /* Setup exception stack */
+ ldr x1, 3f
+ msr SPSel, #1
+ isb
- /* TODO: Clear BSS */
+ mov sp, x1
/* Setup new stack */
ldr x1, 2f
- mov sp, x1
+ msr SPSel, #0
+ isb
- /* TODO: Save old stack pointer and link register */
+ mov sp, x1
/* Let's rock. */
bl start_main
- /* %r0 has the return value - pass it on unmolested */
-
- /* TODO: restore old stack pointer and link register */
-
- /* Return to the original context. */
ret
ENDPROC(_entry)
@@ -64,3 +63,5 @@ ENDPROC(_entry)
.quad cb_header_ptr
2:
.quad _stack
+3:
+.quad _exc_stack
diff --git a/payloads/libpayload/arch/arm64/libpayload.ldscript b/payloads/libpayload/arch/arm64/libpayload.ldscript
index 41a2e89faa..1b4395f7b6 100644
--- a/payloads/libpayload/arch/arm64/libpayload.ldscript
+++ b/payloads/libpayload/arch/arm64/libpayload.ldscript
@@ -82,6 +82,11 @@ SECTIONS
. += STACK_SIZE;
. = ALIGN(16);
_stack = .;
+
+ _exc_estack = .;
+ . += STACK_SIZE;
+ . = ALIGN(16);
+ _exc_stack = .;
}
_end = .;