diff options
Diffstat (limited to 'libgloss/rl78/crt0.S')
| -rw-r--r-- | libgloss/rl78/crt0.S | 66 |
1 files changed, 28 insertions, 38 deletions
diff --git a/libgloss/rl78/crt0.S b/libgloss/rl78/crt0.S index d5a07df90..fbba093a3 100644 --- a/libgloss/rl78/crt0.S +++ b/libgloss/rl78/crt0.S @@ -147,55 +147,45 @@ _start: ;; block move to initialize .data - ;; we're copying from 00:[_romdatastart] to 0F:[_datastart] - ;; and our data is not in the mirrored area. mov es, #0 - - sel rb0 ; bank 0 - movw hl, #__datastart - movw de, #__romdatastart - sel rb1 ; bank 1 - movw ax, #__romdatacopysize - shrw ax,1 -1: + movw bc, #__romdatacopysize +1: + movw ax, bc cmpw ax, #0 bz $1f - decw ax - sel rb0 ; bank 0 - movw ax, es:[de] - movw [hl], ax - incw de - incw de - incw hl - incw hl - sel rb1 + decw bc + decw bc + movw ax, es:__romdatastart[bc] + movw __datastart[bc], ax br $1b -1: - sel rb0 ; bank 0 +1: + + mov es, #0 + movw bc, #__romsaddrcopysize +1: + movw ax, bc + cmpw ax, #0 + bz $1f + decw bc + decw bc + movw ax, es:__romsaddrstart[bc] + movw __saddrstart[bc], ax + br $1b +1: ;; block fill to .bss - sel rb0 ; bank 0 - movw hl, #__bssstart + movw bc, #__bsssize movw ax, #0 - sel rb1 ; bank 1 - movw ax, #__bsssize - shrw ax,1 -1: - cmpw ax, #0 +1: + cmpw ax, bc bz $1f - decw ax - sel rb0 ; bank 0 - movw [hl], ax - incw hl - incw hl - sel rb1 + movw __bssstart[bc], ax + decw bc + decw bc br $1b -1: - sel rb0 ; bank 0 - - +1: call !!__rl78_init |