ppc: add missing symbols for building with a newer toolchain

SVN-Revision: 18179

1 files changed, 226 insertions, 0 deletions

diff --git a/target/linux/generic-2.6/patches-2.6.31/031-ppc_gcc_build_fix.patch b/target/linux/generic-2.6/patches-2.6.31/031-ppc_gcc_build_fix.patch
new file mode 100644
index 0000000..3151eee
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.31/031-ppc_gcc_build_fix.patch
@@ -0,0 +1,226 @@
+GCC 4.4.x looks to be adding support for generating out-of-line register
+saves/restores based on:
+
+http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html
+
+This breaks the kernel build as we'd have to link with libgcc to get the
+implementation of the register save/restores.
+
+To workaround this issue, we just stole the save/restore code from gcc
+and simplified it down for our needs (integer only).  We only do this if
+PPC32 as gcc makes believe the linker on ppc64 will deal with this and
+only if CONFIG_CC_OPTIMIZE_FOR_SIZE is set (thus -Os).
+
+Signed-off-by: Kumar Gala <[EMAIL PROTECTED]>
+---
+
+If someone using cutting edge toolchains for ppc64 could test and make
+sure if we enable CONFIG_CC_OPTIMIZE_FOR_SIZE things work that would be
+nice.
+
+- k
+
+ arch/powerpc/kernel/misc_32.S   |   77 +++++++++++++++++++++++++++
+ arch/powerpc/kernel/ppc_ksyms.c |  111 +++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 188 insertions(+), 0 deletions(-)
+
+--- a/arch/powerpc/kernel/misc_32.S
++++ b/arch/powerpc/kernel/misc_32.S
+@@ -813,3 +813,80 @@ relocate_new_kernel_end:
+ relocate_new_kernel_size:
+ 	.long relocate_new_kernel_end - relocate_new_kernel
+ #endif
++
++#if defined(CONFIG_PPC32) && defined(CONFIG_CC_OPTIMIZE_FOR_SIZE)
++/* Routines for saving integer registers, called by the compiler.  */
++/* Called with r11 pointing to the stack header word of the caller of the */
++/* function, just beyond the end of the integer save area.  */
++
++_GLOBAL(_savegpr_14)   stw     14,-72(11)      /* save gp registers */
++_GLOBAL(_savegpr_15)   stw     15,-68(11)
++_GLOBAL(_savegpr_16)   stw     16,-64(11)
++_GLOBAL(_savegpr_17)   stw     17,-60(11)
++_GLOBAL(_savegpr_18)   stw     18,-56(11)
++_GLOBAL(_savegpr_19)   stw     19,-52(11)
++_GLOBAL(_savegpr_20)   stw     20,-48(11)
++_GLOBAL(_savegpr_21)   stw     21,-44(11)
++_GLOBAL(_savegpr_22)   stw     22,-40(11)
++_GLOBAL(_savegpr_23)   stw     23,-36(11)
++_GLOBAL(_savegpr_24)   stw     24,-32(11)
++_GLOBAL(_savegpr_25)   stw     25,-28(11)
++_GLOBAL(_savegpr_26)   stw     26,-24(11)
++_GLOBAL(_savegpr_27)   stw     27,-20(11)
++_GLOBAL(_savegpr_28)   stw     28,-16(11)
++_GLOBAL(_savegpr_29)   stw     29,-12(11)
++_GLOBAL(_savegpr_30)   stw     30,-8(11)
++_GLOBAL(_savegpr_31)   stw     31,-4(11)
++                       blr
++
++/* Routines for restoring integer registers, called by the compiler.  */
++/* Called with r11 pointing to the stack header word of the caller of the */
++/* function, just beyond the end of the integer restore area.  */
++
++_GLOBAL(_restgpr_14)   lwz     14,-72(11)      /* restore gp registers */
++_GLOBAL(_restgpr_15)   lwz     15,-68(11)
++_GLOBAL(_restgpr_16)   lwz     16,-64(11)
++_GLOBAL(_restgpr_17)   lwz     17,-60(11)
++_GLOBAL(_restgpr_18)   lwz     18,-56(11)
++_GLOBAL(_restgpr_19)   lwz     19,-52(11)
++_GLOBAL(_restgpr_20)   lwz     20,-48(11)
++_GLOBAL(_restgpr_21)   lwz     21,-44(11)
++_GLOBAL(_restgpr_22)   lwz     22,-40(11)
++_GLOBAL(_restgpr_23)   lwz     23,-36(11)
++_GLOBAL(_restgpr_24)   lwz     24,-32(11)
++_GLOBAL(_restgpr_25)   lwz     25,-28(11)
++_GLOBAL(_restgpr_26)   lwz     26,-24(11)
++_GLOBAL(_restgpr_27)   lwz     27,-20(11)
++_GLOBAL(_restgpr_28)   lwz     28,-16(11)
++_GLOBAL(_restgpr_29)   lwz     29,-12(11)
++_GLOBAL(_restgpr_30)   lwz     30,-8(11)
++_GLOBAL(_restgpr_31)   lwz     31,-4(11)
++                       blr
++
++/* Routines for restoring integer registers, called by the compiler.  */
++/* Called with r11 pointing to the stack header word of the caller of the */
++/* function, just beyond the end of the integer restore area.  */
++
++_GLOBAL(_restgpr_14_x) lwz     14,-72(11)      /* restore gp registers */
++_GLOBAL(_restgpr_15_x) lwz     15,-68(11)
++_GLOBAL(_restgpr_16_x) lwz     16,-64(11)
++_GLOBAL(_restgpr_17_x) lwz     17,-60(11)
++_GLOBAL(_restgpr_18_x) lwz     18,-56(11)
++_GLOBAL(_restgpr_19_x) lwz     19,-52(11)
++_GLOBAL(_restgpr_20_x) lwz     20,-48(11)
++_GLOBAL(_restgpr_21_x) lwz     21,-44(11)
++_GLOBAL(_restgpr_22_x) lwz     22,-40(11)
++_GLOBAL(_restgpr_23_x) lwz     23,-36(11)
++_GLOBAL(_restgpr_24_x) lwz     24,-32(11)
++_GLOBAL(_restgpr_25_x) lwz     25,-28(11)
++_GLOBAL(_restgpr_26_x) lwz     26,-24(11)
++_GLOBAL(_restgpr_27_x) lwz     27,-20(11)
++_GLOBAL(_restgpr_28_x) lwz     28,-16(11)
++_GLOBAL(_restgpr_29_x) lwz     29,-12(11)
++_GLOBAL(_restgpr_30_x) lwz     30,-8(11)
++_GLOBAL(_restgpr_31_x) lwz     0,4(11)
++                       lwz     31,-4(11)
++                       mtlr    0
++                       mr      1,11
++                       blr
++#endif
+--- a/arch/powerpc/kernel/ppc_ksyms.c
++++ b/arch/powerpc/kernel/ppc_ksyms.c
+@@ -188,3 +188,114 @@ EXPORT_SYMBOL(__mtdcr);
+ EXPORT_SYMBOL(__mfdcr);
+ #endif
+ EXPORT_SYMBOL(empty_zero_page);
++
++#if defined(CONFIG_PPC32) && defined(CONFIG_CC_OPTIMIZE_FOR_SIZE)
++void _savegpr_14(void);
++void _savegpr_15(void);
++void _savegpr_16(void);
++void _savegpr_17(void);
++void _savegpr_18(void);
++void _savegpr_19(void);
++void _savegpr_20(void);
++void _savegpr_21(void);
++void _savegpr_22(void);
++void _savegpr_23(void);
++void _savegpr_24(void);
++void _savegpr_25(void);
++void _savegpr_26(void);
++void _savegpr_27(void);
++void _savegpr_28(void);
++void _savegpr_29(void);
++void _savegpr_30(void);
++void _savegpr_31(void);
++void _restgpr_14(void);
++void _restgpr_15(void);
++void _restgpr_16(void);
++void _restgpr_17(void);
++void _restgpr_18(void);
++void _restgpr_19(void);
++void _restgpr_20(void);
++void _restgpr_21(void);
++void _restgpr_22(void);
++void _restgpr_23(void);
++void _restgpr_24(void);
++void _restgpr_25(void);
++void _restgpr_26(void);
++void _restgpr_27(void);
++void _restgpr_28(void);
++void _restgpr_29(void);
++void _restgpr_30(void);
++void _restgpr_31(void);
++void _restgpr_14_x(void);
++void _restgpr_15_x(void);
++void _restgpr_16_x(void);
++void _restgpr_17_x(void);
++void _restgpr_18_x(void);
++void _restgpr_19_x(void);
++void _restgpr_20_x(void);
++void _restgpr_21_x(void);
++void _restgpr_22_x(void);
++void _restgpr_23_x(void);
++void _restgpr_24_x(void);
++void _restgpr_25_x(void);
++void _restgpr_26_x(void);
++void _restgpr_27_x(void);
++void _restgpr_28_x(void);
++void _restgpr_29_x(void);
++void _restgpr_30_x(void);
++void _restgpr_31_x(void);
++EXPORT_SYMBOL(_savegpr_14);
++EXPORT_SYMBOL(_savegpr_15);
++EXPORT_SYMBOL(_savegpr_16);
++EXPORT_SYMBOL(_savegpr_17);
++EXPORT_SYMBOL(_savegpr_18);
++EXPORT_SYMBOL(_savegpr_19);
++EXPORT_SYMBOL(_savegpr_20);
++EXPORT_SYMBOL(_savegpr_21);
++EXPORT_SYMBOL(_savegpr_22);
++EXPORT_SYMBOL(_savegpr_23);
++EXPORT_SYMBOL(_savegpr_24);
++EXPORT_SYMBOL(_savegpr_25);
++EXPORT_SYMBOL(_savegpr_26);
++EXPORT_SYMBOL(_savegpr_27);
++EXPORT_SYMBOL(_savegpr_28);
++EXPORT_SYMBOL(_savegpr_29);
++EXPORT_SYMBOL(_savegpr_30);
++EXPORT_SYMBOL(_savegpr_31);
++EXPORT_SYMBOL(_restgpr_14);
++EXPORT_SYMBOL(_restgpr_15);
++EXPORT_SYMBOL(_restgpr_16);
++EXPORT_SYMBOL(_restgpr_17);
++EXPORT_SYMBOL(_restgpr_18);
++EXPORT_SYMBOL(_restgpr_19);
++EXPORT_SYMBOL(_restgpr_20);
++EXPORT_SYMBOL(_restgpr_21);
++EXPORT_SYMBOL(_restgpr_22);
++EXPORT_SYMBOL(_restgpr_23);
++EXPORT_SYMBOL(_restgpr_24);
++EXPORT_SYMBOL(_restgpr_25);
++EXPORT_SYMBOL(_restgpr_26);
++EXPORT_SYMBOL(_restgpr_27);
++EXPORT_SYMBOL(_restgpr_28);
++EXPORT_SYMBOL(_restgpr_29);
++EXPORT_SYMBOL(_restgpr_30);
++EXPORT_SYMBOL(_restgpr_31);
++EXPORT_SYMBOL(_restgpr_14_x);
++EXPORT_SYMBOL(_restgpr_15_x);
++EXPORT_SYMBOL(_restgpr_16_x);
++EXPORT_SYMBOL(_restgpr_17_x);
++EXPORT_SYMBOL(_restgpr_18_x);
++EXPORT_SYMBOL(_restgpr_19_x);
++EXPORT_SYMBOL(_restgpr_20_x);
++EXPORT_SYMBOL(_restgpr_21_x);
++EXPORT_SYMBOL(_restgpr_22_x);
++EXPORT_SYMBOL(_restgpr_23_x);
++EXPORT_SYMBOL(_restgpr_24_x);
++EXPORT_SYMBOL(_restgpr_25_x);
++EXPORT_SYMBOL(_restgpr_26_x);
++EXPORT_SYMBOL(_restgpr_27_x);
++EXPORT_SYMBOL(_restgpr_28_x);
++EXPORT_SYMBOL(_restgpr_29_x);
++EXPORT_SYMBOL(_restgpr_30_x);
++EXPORT_SYMBOL(_restgpr_31_x);
++#endif /* CONFIG_PPC32 && CONFIG_CC_OPTIMIZE_FOR_SIZE */