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authorAurelien Jacquiot <a-jacquiot@ti.com>2011-02-23 13:04:59 +0100
committerBernd Schmidt <bernds@codesourcery.com>2011-03-05 18:10:15 +0100
commit46d6a24872b7fa2717f8f71b5e0598a14d38e1f6 (patch)
tree886cf5a54ef7fd260acf2dd7d1722acea1c62186 /libc/sysdeps/linux/c6x/crt1.S
parent817f685f4c65ed1af6eef79749b1f158eedd5bfc (diff)
The C6X port
This adds support for the TI C6X family of processors. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Signed-off-by: Bernd Schmidt <bernds@codesourcery.com>
Diffstat (limited to 'libc/sysdeps/linux/c6x/crt1.S')
-rw-r--r--libc/sysdeps/linux/c6x/crt1.S67
1 files changed, 67 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/c6x/crt1.S b/libc/sysdeps/linux/c6x/crt1.S
new file mode 100644
index 000000000..810f39557
--- /dev/null
+++ b/libc/sysdeps/linux/c6x/crt1.S
@@ -0,0 +1,67 @@
+;
+; Port of uClibc for TMS320C6000 DSP architecture
+;
+; Copyright (C) 2010 Texas Instruments Incorporated
+; Mark Salter <msalter@redhat.com>
+;
+; This program is free software; you can redistribute it and/or modify it
+; under the terms of the GNU Library General Public License as published by
+; the Free Software Foundation; either version 2 of the License, or (at your
+; option) any later version.
+;
+; This program is distributed in the hope that it will be useful, but WITHOUT
+; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+; FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
+; for more details.
+;
+; You should have received a copy of the GNU Library General Public License
+; along with this program; if not, write to the Free Software Foundation,
+; Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+;
+
+ .text
+
+ ;; On entry, the dynamic linker
+ ;;
+ ;; 0(sp) pad0
+ ;; 4(sp) pad1
+ ;; 8(sp) argc
+ ;; 12(sp) argv[0]
+ ;; ...
+ ;; (4*(argc+3))(sp) NULL
+ ;; (4*(argc+4))(sp) envp[0]
+ ;; ...
+ ;; NULL
+
+ ;; Register values are unspecified, except:
+ ;;
+ ;; A4 --> pointer to rtld fini rountine
+ ;; B14 --> pointer to application DSBT table
+
+ .global _start
+_start:
+ .global _c_int00
+_c_int00:
+ ;; Things to do:
+ ;;
+ ;; * call __uClibc_main(
+ ;; int (*main)(int, char **, char **), A4
+ ;; int argc, B4
+ ;; char **argv, A6
+ ;; void (*app_init)(void), B6
+ ;; void (*app_fini)(void), A8
+ ;; void (*rtld_fini)(void), B8
+ ;; void *stack_end) A10
+
+ MV .D2X A4,B8 ; rtld_fini
+
+ LDW .D2T1 *+B14($GOT(main)), A4
+ LDW .D2T2 *+B14($GOT(_init)), B6
+ B .S2 __uClibc_main
+|| LDW .D2T1 *+B14($GOT(_fini)), A8
+
+ LDW .D2T2 *+B15(8),B4 ; argc
+ ADDAW .D1X B15,3,A6 ; **argv
+ MV .D1X B15,A10 ; stack_end
+|| ZERO .L1 A15 ; clear FP
+ NOP 2