diff options
Diffstat (limited to 'packages/gcc/gcc-3.4.6/gcc34-thumb-support.patch')
| -rw-r--r-- | packages/gcc/gcc-3.4.6/gcc34-thumb-support.patch | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/packages/gcc/gcc-3.4.6/gcc34-thumb-support.patch b/packages/gcc/gcc-3.4.6/gcc34-thumb-support.patch new file mode 100644 index 0000000000..a4f156f8db --- /dev/null +++ b/packages/gcc/gcc-3.4.6/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] |