diff options
Diffstat (limited to 'libgloss/xstormy16/crt0.s')
| -rw-r--r-- | libgloss/xstormy16/crt0.s | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/libgloss/xstormy16/crt0.s b/libgloss/xstormy16/crt0.s index 28f8c8a8d..39e00d236 100644 --- a/libgloss/xstormy16/crt0.s +++ b/libgloss/xstormy16/crt0.s @@ -22,8 +22,10 @@ _start: ;; port1 interrupt jmpf _int_port1 - .text # Reset code, set up memory and call main. + .section .rodata +2: .word __rdata + .text _int_reset: ;; Set up the stack pointer. mov r0,#__stack @@ -36,6 +38,24 @@ _int_reset: mov r2,#0 0: mov.w (r0++),r2 blt r0,r1,0b + + ;; Copy data from ROM into RAM. ROM area may be above 64k, + ;; but RAM may not. + mov r1,#__data + mov r3,#_edata + mov r4,#2b + mov.w r0,(r4++) + mov.w r2,(r4) + mov r8,r2 + ;; If _data == _rdata there's no need to copy anything. + bnz r0,r1,0f + bz r2,#0,1f +0: movf.w r2,(r0++) + bnz r0,#0,2f + add r8,#1 +2: mov.w (r1++),r2 + blt r1,r3,0b +1: ;; Call hardware init routine callf _hwinit ;; Call initialization routines |