diff options
Diffstat (limited to 'poky/meta/recipes-support/db/db/arm-thumb-mutex_db5.patch')
| -rw-r--r-- | poky/meta/recipes-support/db/db/arm-thumb-mutex_db5.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/poky/meta/recipes-support/db/db/arm-thumb-mutex_db5.patch b/poky/meta/recipes-support/db/db/arm-thumb-mutex_db5.patch new file mode 100644 index 000000000..6a8eada60 --- /dev/null +++ b/poky/meta/recipes-support/db/db/arm-thumb-mutex_db5.patch @@ -0,0 +1,50 @@ +Original patch submitted by jbowler@nslu2-linux.org on 2005-11-17: + +db: fix thumb uclibc operation in 4.3.29 + - uclibc thumb builds were using libpthread to implement mutexes, the + - uclibc version seems to be a stub (at least on thumb). This commit + - fixes the ARM/gcc-assembly mutex implementation so that it has thumb + - support and the resultant db4 works (tested on LE Thumb uclibc) + +Upstream-Status: Inappropriate [embedded specific] + +Author: jbowler@nslu2-linux.org + +Index: db-6.0.30/src/dbinc/mutex_int.h +=================================================================== +--- db-6.0.30.orig/src/dbinc/mutex_int.h ++++ db-6.0.30/src/dbinc/mutex_int.h +@@ -474,6 +474,25 @@ typedef unsigned char tsl_t; + + #ifdef LOAD_ACTUAL_MUTEX_CODE + /* gcc/arm: 0 is clear, 1 is set. */ ++#if defined __thumb__ ++#define MUTEX_SET(tsl) ({ \ ++ int __r, __p; \ ++ __asm__ volatile( \ ++ ".align 2\n\t" \ ++ "bx pc\n\t" \ ++ "nop\n\t" \ ++ ".arm\n\t" \ ++ "swpb %0, %2, [%3]\n\t" \ ++ "eor %0, %0, #1\n\t" \ ++ "orr %1, pc, #1\n\t" \ ++ "bx %1\n\t" \ ++ ".force_thumb" \ ++ : "=&r" (__r), "=r" (__p) \ ++ : "r" (1), "r" (tsl) \ ++ ); \ ++ __r & 1; \ ++}) ++#else + #define MUTEX_SET(tsl) ({ \ + int __r; \ + __asm__ volatile( \ +@@ -484,6 +503,7 @@ typedef unsigned char tsl_t; + ); \ + __r & 1; \ + }) ++#endif + + #define MUTEX_UNSET(tsl) (*(volatile tsl_t *)(tsl) = 0) + #define MUTEX_INIT(tsl) (MUTEX_UNSET(tsl), 0) |
