diff options
| author | John Bowler <jbowler@nslu2-linux.org> | 2005-08-14 06:07:44 +0000 |
|---|---|---|
| committer | OpenEmbedded Project <openembedded-devel@lists.openembedded.org> | 2005-08-14 06:07:44 +0000 |
| commit | 98318c22a913b1500564268e3c499dc57cc036e0 (patch) | |
| tree | f45374265f144b31b15051b7b229120039fa23ee /packages/uclibc/uclibc-0.9.27/thumb-static-main.patch | |
| parent | cc49ea85bdc9b42f77b3c01f950b179e56bf8f2f (diff) | |
Fix uclibc thumb support - with these patches and by disabling the ARM
specific string asm in uclibc it is possible to run at least some thumb
executables on ucslugc. The changes can be incorporated into other
distros by setting thumb-interwork in OVERRIDES - the changes do change
the way ARM code executes (necessarily). (Changes have also been submitted
as bug 385 to uclibc.org).
Diffstat (limited to 'packages/uclibc/uclibc-0.9.27/thumb-static-main.patch')
| -rw-r--r-- | packages/uclibc/uclibc-0.9.27/thumb-static-main.patch | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/packages/uclibc/uclibc-0.9.27/thumb-static-main.patch b/packages/uclibc/uclibc-0.9.27/thumb-static-main.patch new file mode 100644 index 0000000000..5b82f39bbf --- /dev/null +++ b/packages/uclibc/uclibc-0.9.27/thumb-static-main.patch @@ -0,0 +1,60 @@ +# This patch almost works, it allows a statically linked application +# to be compiled with a thumb main and to have this work from a +# non-thumb uClibc build. However it stops the same thing working +# in the dynamically linked case (because the value of 'main' doesn't +# have the low bit set when loaded - something must be wrong with the +# relocation for STT_ARM_TFUNC?) At present it is not included for +# this reason. +--- uClibc-0.9.27/libc/misc/internals/__uClibc_main.c 2005-08-13 18:04:09.078682965 -0700 ++++ uClibc-0.9.27/libc/misc/internals/__uClibc_main.c 2005-08-13 18:07:38.159839613 -0700 +@@ -32,6 +32,13 @@ + /* + * Prototypes. + */ ++#if (defined __arm__ || defined __thumb__) && defined __THUMB_INTERWORK__ && defined __linux__ ++/* Because when linking statically the GNU linker provides no glue for ++ * main, so if main is thumb and we are arm or vice versa the static ++ * link fails. ++ */ ++# define main __arm_main ++#endif + extern int main(int argc, char **argv, char **envp); + extern void weak_function _stdio_init(void); + extern int *weak_const_function __errno_location(void); +--- uClibc-0.9.27/libc/sysdeps/linux/arm/Makefile 2005-01-11 23:59:21.000000000 -0800 ++++ uClibc-0.9.27/libc/sysdeps/linux/arm/Makefile 2005-08-13 18:08:08.953777353 -0700 +@@ -25,7 +25,7 @@ + CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o + + SSRC=__longjmp.S vfork.S clone.S setjmp.S bsd-setjmp.S \ +- bsd-_setjmp.S sigrestorer.S mmap64.S ++ bsd-_setjmp.S sigrestorer.S mmap64.S mainglue.S + SOBJS=$(patsubst %.S,%.o, $(SSRC)) + + CSRC=brk.c syscall.c ioperm.c sigaction.c +--- uClibc-0.9.27/.pc/thumb-static-main.patch/libc/sysdeps/linux/arm/mainglue.S 2005-08-13 18:20:44.181300825 -0700 ++++ uClibc-0.9.27/libc/sysdeps/linux/arm/mainglue.S 2005-08-13 19:11:05.031390937 -0700 +@@ -0,0 +1,23 @@ ++/* ++ * Apparently the GNU linker doesn't generate the 'glue' code ++ * required for ARM/thumb interwork for the 'main' function - ++ * presumably glibc doesn't need it, but uClibc does. ++ * ++ * We can't provide this stuff, because the linker expects to ++ * have generated the glue code itself and asserts if the code ++ * is not in memory (because it has been read from a pre-existing ++ * definition), therefore we must avoid the glue - so we make ++ * __uClibc_main call __arm_main and define it here (in arm ++ * code). ++ */ ++#if defined __THUMB_INTERWORK__ ++ .text ++ .arm ++ .global __arm_main ++ .type __arm_main, %function ++__arm_main: ++ ldr ip, [pc] ++ bx ip ++ .word main ++ .size __arm_main,.-__arm_main ++#endif |