diff options
Diffstat (limited to 'toolchain/uClibc/patches-0.9.32/950-detect_bx_availibility.patch')
| -rw-r--r-- | toolchain/uClibc/patches-0.9.32/950-detect_bx_availibility.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/toolchain/uClibc/patches-0.9.32/950-detect_bx_availibility.patch b/toolchain/uClibc/patches-0.9.32/950-detect_bx_availibility.patch new file mode 100644 index 000000000..24d5bcca6 --- /dev/null +++ b/toolchain/uClibc/patches-0.9.32/950-detect_bx_availibility.patch @@ -0,0 +1,49 @@ +The "use BX" option is now a suggestion that BX be used if available. +Use a macro to detect if BX is available at build time. If so, and +the user requested it be used, then use it. Otherwise, error out. + +Macro courtesy Khem RAJ: + http://lists.uclibc.org/pipermail/uclibc/2009-April/042301.html + +Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> +Cc: Khem Raj <raj.khem@gmail.com> +Cc: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> +Cc: Carmelo AMOROSO <carmelo.amoroso@st.com> +--- + extra/Configs/Config.arm | 4 +++- + libc/sysdeps/linux/arm/bits/arm_asm.h | 9 ++++++++- + 2 files changed, 11 insertions(+), 2 deletions(-) + +diff --git a/extra/Configs/Config.arm b/extra/Configs/Config.arm +index 227b90c..9aa9e56 100644 +--- a/extra/Configs/Config.arm ++++ b/extra/Configs/Config.arm +@@ -33,4 +33,6 @@ config COMPILE_IN_THUMB_MODE + config USE_BX + bool "Use BX in function return" + help +- Use BX instruction for THUMB aware architectures. ++ Say 'y' to use BX to return from functions on your thumb-aware ++ processor. Say 'y' if you need to use interworking. Say 'n' if not. ++ It is safe to say 'y' even if you're not doing interworking. +diff --git a/libc/sysdeps/linux/arm/bits/arm_asm.h b/libc/sysdeps/linux/arm/bits/arm_asm.h +index 1d87df6..921c9a3 100644 +--- a/libc/sysdeps/linux/arm/bits/arm_asm.h ++++ b/libc/sysdeps/linux/arm/bits/arm_asm.h +@@ -24,5 +24,12 @@ + #define THUMB1_ONLY 1 + #endif + +-#endif /* _ARM_ASM_H */ ++#if defined(__USE_BX__) ++# if ( defined (__ARM_ARCH_2__) || defined (__ARM_ARCH_3__) \ ++ || defined (__ARM_ARCH_3M__) || defined (__ARM_ARCH_4__) \ ++ ) ++# error Use of BX was requested, but is not available on the target processor. ++# endif /* ARCH level */ ++#endif /* __USE_BX__ */ + ++#endif /* _ARM_ASM_H */ +-- +1.7.1 + |