1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/patches/glibc/2.3.2/glibc-2.3.2-sh4-trapa.patch Sun May 27 21:15:46 2007 +0000
1.3 @@ -0,0 +1,55 @@
1.4 +http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/unix/sysv/linux/sh/sysdep.h.diff?r1=1.9&r2=1.10&cvsroot=glibc
1.5 +
1.6 +Ankur Sheth said:
1.7 +
1.8 +"This is actually a workaround for a bug in the sh4. The actual bug is
1.9 +documented here :
1.10 +http://documentation.renesas.com/eng/products/mpumcu/tu/tnsh7456ae.pdf
1.11 +Basically the cache & TLB should not be accessed for 4 (or was it 5?) cycles
1.12 +after isssuing a TRAPA instruction. I didn't run into any specific problem
1.13 +because of this bug, but it seems useful to have and the patch itself seems
1.14 +pretty harmless."
1.15 +
1.16 +
1.17 +===================================================================
1.18 +RCS file: /cvs/glibc/libc/sysdeps/unix/sysv/linux/sh/sysdep.h,v
1.19 +retrieving revision 1.9
1.20 +retrieving revision 1.10
1.21 +diff -u -r1.9 -r1.10
1.22 +--- libc/sysdeps/unix/sysv/linux/sh/sysdep.h 2003/09/01 04:05:21 1.9
1.23 ++++ libc/sysdeps/unix/sysv/linux/sh/sysdep.h 2003/10/15 04:36:32 1.10
1.24 +@@ -183,6 +183,13 @@
1.25 + # endif /* _LIBC_REENTRANT */
1.26 + #endif /* PIC */
1.27 +
1.28 ++# ifdef NEED_SYSCALL_INST_PAD
1.29 ++# define SYSCALL_INST_PAD \
1.30 ++ or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0
1.31 ++# else
1.32 ++# define SYSCALL_INST_PAD
1.33 ++# endif
1.34 ++
1.35 + #define SYSCALL_INST0 trapa #0x10
1.36 + #define SYSCALL_INST1 trapa #0x11
1.37 + #define SYSCALL_INST2 trapa #0x12
1.38 +@@ -195,19 +202,13 @@
1.39 + #define DO_CALL(syscall_name, args) \
1.40 + mov.l 1f,r3; \
1.41 + SYSCALL_INST##args; \
1.42 ++ SYSCALL_INST_PAD; \
1.43 + bra 2f; \
1.44 + nop; \
1.45 + .align 2; \
1.46 + 1: .long SYS_ify (syscall_name); \
1.47 + 2:
1.48 +
1.49 +-# ifdef NEED_SYSCALL_INST_PAD
1.50 +-# define SYSCALL_INST_PAD \
1.51 +- or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0
1.52 +-# else
1.53 +-# define SYSCALL_INST_PAD
1.54 +-# endif
1.55 +-
1.56 + #else /* not __ASSEMBLER__ */
1.57 +
1.58 + #define SYSCALL_INST_STR0 "trapa #0x10\n\t"