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base: add initial r0 register to crt0.s for arm

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Issue #2451
This commit is contained in:
Alexander Boettcher 2017-07-04 16:41:07 +02:00 committed by Christian Helmuth
parent 782b457476
commit c22b60f0c4
1 changed files with 6 additions and 0 deletions
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6
repos/base/src/lib/startup/spec/arm/crt0.s
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@ -28,6 +28,8 @@
/* make initial value of some registers available to higher-level code */ /* make initial value of some registers available to higher-level code */
ldr r4, =__initial_sp ldr r4, =__initial_sp
str sp, [r4] str sp, [r4]
ldr r4, =__initial_r0
str r0, [r4]
/* /*
* Install initial temporary environment that is replaced later by the * Install initial temporary environment that is replaced later by the
@ -66,3 +68,7 @@
.global __initial_sp .global __initial_sp
__initial_sp: __initial_sp:
.space 4 .space 4
/* initial value of the R0 register */
.global __initial_r0
__initial_r0:
.space 4