uclibc_0.9.28: fix thumb support to allow thumb uclibc

This, together with the fixes in gcc and binutils, allows a system to
be build with thumb libgcc and libuClibc (etc).  ucslugc is changed to
release 2 and to use thumb compilation of these modules.

1 files changed, 78 insertions, 7 deletions

diff --git a/packages/uclibc/uclibc-0.9.28/thumb-mov-pc-bx.patch b/packages/uclibc/uclibc-0.9.28/thumb-mov-pc-bx.patch
index 86713a7678..44191695e7 100644
--- a/packages/uclibc/uclibc-0.9.28/thumb-mov-pc-bx.patch
+++ b/packages/uclibc/uclibc-0.9.28/thumb-mov-pc-bx.patch
@@ -15,15 +15,15 @@
 # so this is safe.  See gcc lib1asmfuncs for a more exact test.
 #
 --- uClibc-0.9.28/.pc/thumb-mov-pc-bx.patch/ldso/ldso/arm/dl-startup.h	2005-08-17 15:49:41.000000000 -0700
-+++ uClibc-0.9.28/ldso/ldso/arm/dl-startup.h	2005-09-08 09:34:22.918316874 -0700
-@@ -8,6 +8,7 @@
++++ uClibc-0.9.28/ldso/ldso/arm/dl-startup.h	2005-09-16 23:38:34.266546180 -0700
+@@ -4,6 +4,7 @@
+  * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org>
+  */
+ 
++#if defined(__arm__)
+ asm(
      "	.text\n"
      "	.globl	_start\n"
-     "	.type	_start,%function\n"
-+    "	.arm\n"
- 	"_start:\n"
- 	"	@ at start time, all the args are on the stack\n"
- 	"	mov	r0, sp\n"
 @@ -40,7 +41,11 @@
  	"	ldr	r0, .L_FINI_PROC\n"
  	"	ldr	r0, [sl, r0]\n"
@@ -36,6 +36,77 @@
  	".L_GET_GOT:\n"
  	"	.word	_GLOBAL_OFFSET_TABLE_ - .L_GOT_GOT - 4\n"
  	".L_SKIP_ARGS:\n"
+@@ -51,6 +56,70 @@
+     "	.size	_start,.-_start\n"
+ 	".previous\n"
+ );
++#else
++asm(
++    "	.text\n"
++    "	.arm\n"
++    "	.globl	_start\n"
++    "	.type	_start,%function\n"
++	"_start:\n"
++	"	@ dumb: can't persuade the linker to make the start address\n"
++	"	@ odd, so use an arm function and change to thumb (_dl_start\n"
++	"	@ is thumb)\n"
++	"	adr	r0, __dl_thumb_start+1\n"
++	"	bx	r0\n"
++	"\n\n"
++    "	.thumb\n"
++    "	.globl	__dl_thumb_start\n"
++    "	.thumb_func\n"
++    "	.type	__dl_thumb_start,%function\n"
++	"__dl_thumb_start:\n"
++	"	@ at start time, all the args are on the stack\n"
++	"	mov	r0, sp\n"
++	"	bl	_dl_start\n"
++	"	@ returns user entry point in r0\n"
++	"	mov	r6, r0\n"
++	"	@ we are PIC code, so get global offset table\n"
++	"	ldr	r7, .L_GET_GOT\n"
++	".L_GOT_GOT:\n"
++	"	add	r7, pc\n"
++	"	@ See if we were run as a command with the executable file\n"
++	"	@ name as an extra leading argument.\n"
++	"	ldr	r4, .L_SKIP_ARGS\n"
++	"	ldr	r4, [r7, r4]\n"
++	"	@ get the original arg count\n"
++	"	ldr	r1, [sp]\n"
++	"	@ subtract _dl_skip_args from it\n"
++	"	sub	r1, r1, r4\n"
++	"	@ adjust the stack pointer to skip them\n"
++	"	lsl	r4, r4, #2\n"
++	"	add	sp, r4\n"
++	"	@ get the argv address\n"
++	"	add	r2, sp, #4\n"
++	"	@ store the new argc in the new stack location\n"
++	"	str	r1, [sp]\n"
++	"	@ compute envp\n"
++	"	lsl	r3, r1, #2\n"
++	"	add	r3, r3, r2\n"
++	"	add	r3, #4\n"
++	"\n\n"
++	"	@ load the finalizer function\n"
++	"	ldr	r0, .L_FINI_PROC\n"
++	"	ldr	r0, [r7, r0]\n"
++	"	@ jump to the user_s entry point\n"
++	"	bx	r6\n"
++	"\n\n"
++	".L_GET_GOT:\n"
++	"	.word	_GLOBAL_OFFSET_TABLE_ - .L_GOT_GOT - 4\n"
++	".L_SKIP_ARGS:\n"
++	"	.word	_dl_skip_args(GOTOFF)\n"
++	".L_FINI_PROC:\n"
++	"	.word	_dl_fini(GOT)\n"
++	"\n\n"
++    "	.size	_start,.-_start\n"
++	".previous\n"
++);
++#endif
+ 
+ 
+ /* Get a pointer to the argv array.  On many platforms this can be just
 --- uClibc-0.9.28/.pc/thumb-mov-pc-bx.patch/ldso/ldso/arm/dl-sysdep.h	2005-08-17 15:49:41.000000000 -0700
 +++ uClibc-0.9.28/ldso/ldso/arm/dl-sysdep.h	2005-09-07 20:10:35.923583424 -0700
 @@ -85,7 +85,19 @@