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authorDavid McCullough <davidm@snapgear.com>2001-01-29 15:02:05 +0000
committerDavid McCullough <davidm@snapgear.com>2001-01-29 15:02:05 +0000
commite9e69bd628e4495c975bb82dc3aabc536ae97329 (patch)
tree87766426bc73ba3c5388c18fe8acaf57b4d8a633 /libc/sysdeps/linux/m68k/crt0.S
parent5a2610fbeb4667ffac25551f5484b629707b996e (diff)
uClibc working with 2.0.x and 2.4.x m68k uClinux kernels, the PIC
stuff in crt0.S may not be quite right yet.
Diffstat (limited to 'libc/sysdeps/linux/m68k/crt0.S')
-rw-r--r--libc/sysdeps/linux/m68k/crt0.S40
1 files changed, 16 insertions, 24 deletions
diff --git a/libc/sysdeps/linux/m68k/crt0.S b/libc/sysdeps/linux/m68k/crt0.S
index 1c64ea960..c2e8a6c60 100644
--- a/libc/sysdeps/linux/m68k/crt0.S
+++ b/libc/sysdeps/linux/m68k/crt0.S
@@ -17,10 +17,14 @@ License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
+/*
+ * NOTE: this file works for PIC and non-PIC code. Be very careful how
+ * you modify it !
+ */
.global _start
.global __main
.global _end
-/* .global __data_start */
+ .global _sdata
.bss
.global environ
@@ -32,30 +36,22 @@ _start: /* renamed from __start */
nop
nop
- movea.l %d5, %a5
-
- lea __bss_start(%a5), %a0
- lea end(%a5), %a1
-
- /* Copy 0 to %a0 until %a0 == %a1 */
- /*
- From my understanding of linux/fs/binfmt_flat.c for uClinux,
- this is not necessary anymore. The loader will clear out
- the BSS for us. - jgraves@deltamobile.com
-
-L1:
- movel #0, %a0@+
- cmpal %a0, %a1
- bhi L1
- */
+ movea.l %d5, %a5 /* uClinux passes in data segment here */
move.l 8(%sp), %d5
- move.l %d5, environ(%a5)
+
+ lea.l _sdata, %a1 /* set environ to point to the right place */
+ lea.l environ, %a0
+ sub.l %a1, %a0
+ move.l %d5, %a5@(%a0)
- bsr main
+ lea main-.-8, %a0 /* call main */
+ jsr %pc@(%a0)
move.l %d0,%sp@-
- bsr exit /* Invoke exit() routine */
+
+ lea exit-.-8, %a0 /* call the exit routine */
+ jsr %pc@(%a0)
#ifdef NO_LIBGCC
/* If that didn't kill us, ... */
@@ -68,8 +64,4 @@ __main:
rts
#else
- .global _cleanup
-_cleanup:
- rts /* nothing to clean up */
-
#endif /* NO_LIBGCC */