arm920t fix constant error in start.S
Code in cpu/arm920t/start.S will die with a compilation error if
CONFIG_STACKSIZE + CFG_MALLOC_LEN works out to an invalid constant for
the ARM sub instruction. Change the code so that each is subtracted
independently to avoid the error.
Signed-off-by: Andrew Dyer <adyer@righthandtech.com>
diff --git a/cpu/arm920t/start.S b/cpu/arm920t/start.S
index 62231f8..5d0fec6 100644
--- a/cpu/arm920t/start.S
+++ b/cpu/arm920t/start.S
@@ -315,7 +315,8 @@
sub sp, sp, #S_FRAME_SIZE
stmia sp, {r0 - r12} @ Calling r0-r12
ldr r2, _armboot_start
- sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r2, r2, #(CONFIG_STACKSIZE)
+ sub r2, r2, #(CFG_MALLOC_LEN)
sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
ldmia r2, {r2 - r3} @ get pc, cpsr
add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
@@ -348,7 +349,8 @@
.macro get_bad_stack
ldr r13, _armboot_start @ setup our mode stack
- sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r13, r13, #(CONFIG_STACKSIZE)
+ sub r13, r13, #(CFG_MALLOC_LEN)
sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr / spsr