gcc_3.4.4: updated thumb patches

The four previous thumb related patch files have been combined into one
and simplified.  Additional problems with call_via_rX functions being
called via the PLT have been fixed (the functions can no longer be called
this way - they are hidden).  Unnecessary adds of exports of these
functions from libgcc have been removed.

1 files changed, 156 insertions, 0 deletions

diff --git a/packages/gcc/gcc-3.4.4/gcc34-thumb-support.patch b/packages/gcc/gcc-3.4.4/gcc34-thumb-support.patch
new file mode 100644
index 0000000000..a4f156f8db
--- /dev/null
+++ b/packages/gcc/gcc-3.4.4/gcc34-thumb-support.patch
@@ -0,0 +1,156 @@
+# This patch contains various fixes for the thumb code handling in GCC 3.4.4
+#
+# Most of these are minor fixes to code which is either missing (Linux thumb
+# div0, thumb clear instruction cache) or uses the wrong return mechanism
+# (libffi)
+#
+# There is also a significant design problem with the _call_via_rx code -
+# it cannot be in a shared library because a call via PLT simply won't
+# work (for _call_via_ip) and is very inefficient anyway.
+#
+# This is fixed in uclibc simply by incorporating the code into crti.S
+# (an extra 30 bytes for the 15 functions) even though not all link units
+# require all the code - there is so little of it.  That doesn't work with
+# the crti.asm here because it is linked with libgcc.a which already defines
+# these symbols
+#
+--- gcc-3.4.4/gcc/config/arm/t-linux.orig	2005-08-09 08:55:02.181797492 -0700
++++ gcc-3.4.4/gcc/config/arm/t-linux	2005-08-09 08:58:22.766419486 -0700
+@@ -7,6 +7,7 @@
+ LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx \
+ 	_negdf2 _addsubdf3 _muldivdf3 _cmpdf2 _unorddf2 _fixdfsi _fixunsdfsi \
+ 	_truncdfsf2 _negsf2 _addsubsf3 _muldivsf3 _cmpsf2 _unordsf2 \
++	_call_via_rX \
+ 	_fixsfsi _fixunssfsi
+ 
+ # MULTILIB_OPTIONS = mhard-float/msoft-float
+--- gcc-3.4.4/.pc/gcc34-thumb-support.patch/gcc/config/arm/lib1funcs.asm	2004-01-15 08:56:34.000000000 -0800
++++ gcc-3.4.4/gcc/config/arm/lib1funcs.asm	2005-09-21 21:32:03.376927755 -0700
+@@ -811,13 +811,18 @@
+ 
+ /* Constants taken from <asm/unistd.h> and <asm/signal.h> */
+ #define SIGFPE	8
++#if !defined __thumb__
+ #define __NR_SYSCALL_BASE	0x900000
++#else
++#define __NR_SYSCALL_BASE	0
++#endif
+ #define __NR_getpid			(__NR_SYSCALL_BASE+ 20)
+ #define __NR_kill			(__NR_SYSCALL_BASE+ 37)
+ 
+ 	.code	32
+ 	FUNC_START div0
+ 
++#if ! defined __thumb__
+ 	stmfd	sp!, {r1, lr}
+ 	swi	__NR_getpid
+ 	cmn	r0, #1000
+@@ -825,6 +830,28 @@
+ 	mov	r1, #SIGFPE
+ 	swi	__NR_kill
+ 	RETLDM	r1
++#else
++	push	{r1, r7, lr}
++	mov	r7, #__NR_getpid
++	swi	0
++	@ above the compare is with -1000, but the standard syscall
++	@ macro checks for -1..-125
++	add	r0, #125
++	bcs	90f
++	sub	r0, #125
++	mov	r1, #SIGFPE
++	mov	r7, #__NR_kill
++	swi	0
++90:	
++#if __ARM_ARCH__ > 4
++	pop	{r1, r7, pc}
++#else
++	@ on 4T that won't work
++	pop	{r1, r7}
++	pop	{r3}
++	bx	r3
++#endif
++#endif
+ 
+ 	FUNC_END div0
+ 	
+@@ -845,14 +872,14 @@
+    code here switches to the correct mode before executing the function.  */
+ 	
+ 	.text
+-	.align 0
++	.align 1
+         .force_thumb
+ 
+ .macro call_via register
+ 	THUMB_FUNC_START _call_via_\register
++	.hidden	SYM (_call_via_\register)
+ 
+ 	bx	\register
+-	nop
+ 
+ 	SIZE	(_call_via_\register)
+ .endm
+@@ -903,6 +930,7 @@
+ 	.code	16
+ 
+ 	THUMB_FUNC_START _interwork_call_via_\register
++	.hidden	SYM (_interwork_call_via_\register)
+ 
+ 	bx	pc
+ 	nop
+--- gcc-3.4.4/.pc/gcc34-thumb-support.patch/gcc/config/arm/linux-gas.h	2003-06-19 14:47:06.000000000 -0700
++++ gcc-3.4.4/gcc/config/arm/linux-gas.h	2005-09-20 16:09:55.027862200 -0700
+@@ -56,6 +56,7 @@
+ 
+ /* Clear the instruction cache from `beg' to `end'.  This makes an
+    inline system call to SYS_cacheflush.  */
++#if !defined(__thumb__)
+ #define CLEAR_INSN_CACHE(BEG, END)					\
+ {									\
+   register unsigned long _beg __asm ("a1") = (unsigned long) (BEG);	\
+@@ -65,3 +66,18 @@
+ 		    : "=r" (_beg)					\
+ 		    : "0" (_beg), "r" (_end), "r" (_flg));		\
+ }
++#else
++#define CLEAR_INSN_CACHE(BEG, END)					\
++{									\
++  register unsigned long _beg __asm ("a1") = (unsigned long) (BEG);	\
++  register unsigned long _end __asm ("a2") = (unsigned long) (END);	\
++  register unsigned long _flg __asm ("a3") = 0;				\
++  register unsigned long _swi __asm ("a4") = 0xf0002;			\
++  __asm __volatile ("push	{r7}\n"					\
++		"	mov	r7,a4\n"				\
++		"	swi	0	@ sys_cacheflush\n"		\
++		"	pop	{r7}\n"					\
++		    : "=r" (_beg)					\
++		    : "0" (_beg), "r" (_end), "r" (_flg), "r" (_swi));	\
++}
++#endif
+--- gcc-3.4.4/.pc/gcc34-thumb-support.patch/libffi/src/arm/sysv.S	2003-10-21 12:01:55.000000000 -0700
++++ gcc-3.4.4/libffi/src/arm/sysv.S	2005-09-20 16:09:55.027862200 -0700
+@@ -41,6 +41,14 @@
+ #define ENTRY(x) .globl CNAME(x); .type CNAME(x),%function; CNAME(x):
+ #endif
+ 	
++/* Get the correct return instruction */
++#if defined(__ARM_ARCH_4T__) || defined(__ARM_ARCH_5__) \
++	|| defined(__ARM_ARCH_5T__) || defined(__ARM_ARCH_5TE__)
++#define RET bx r
++#else
++#define RET mov pc,
++#endif
++
+ .text
+ 
+ 	# a1:   ffi_prep_args
+@@ -66,7 +74,7 @@
+ 
+ 	# And call
+ 	mov   lr, pc
+-	mov   pc, ip
++	RET   ip
+ 
+ 	# move first 4 parameters in registers
+ 	ldr   a1, [sp, #0]