diff options
| -rw-r--r-- | bsps/sparc/shared/start/start.S | 36 |
1 files changed, 4 insertions, 32 deletions
diff --git a/bsps/sparc/shared/start/start.S b/bsps/sparc/shared/start/start.S index f7caacf0e4..369ef72a94 100644 --- a/bsps/sparc/shared/start/start.S +++ b/bsps/sparc/shared/start/start.S @@ -331,47 +331,19 @@ SYM(hard_reset): mov %sp, %fp ! Set frame pointer nop - /* - * Copy the initialized data to RAM - * - * FROM: _data_load_start - * TO: _data_start - * LENGTH: (__bss_start - _data_start) bytes - */ - - sethi %hi(_data_load_start),%g1 ! g1 = start of initialized data in ROM - or %g1,%lo(_data_load_start),%g1 - - sethi %hi(_data_start),%g3 ! g3 = start of initialized data in RAM - or %g3,%lo(_data_start),%g3 + /* clear the bss */ - sethi %hi(__bss_start), %g2 ! g2 = end of initialized data in RAM + sethi %hi(__bss_start), %g2 ! g2 = start of bss or %g2,%lo(__bss_start),%g2 - cmp %g1, %g3 - be 1f - nop - -copy_data: - ldd [%g1], %g4 - std %g4 , [%g3] ! copy this double word - add %g3, 8, %g3 ! bump the destination pointer - add %g1, 8, %g1 ! bump the source pointer - cmp %g3, %g2 ! Is the pointer past the end of dest? - bl copy_data - nop - - /* clear the bss */ -1: - sethi %hi(_end),%g3 or %g3,%lo(_end),%g3 ! g3 = end of bss mov %g0,%g1 ! so std has two zeros -zerobss: +.Lzerobss: std %g0,[%g2] add %g2,8,%g2 cmp %g2,%g3 - bleu,a zerobss + bleu,a .Lzerobss nop mov %g0, %o0 ! command line |