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authorFelix Fietkau <nbd@openwrt.org>2015-07-08 12:06:03 +0000
committerFelix Fietkau <nbd@openwrt.org>2015-07-08 12:06:03 +0000
commitb33bf4f876441772322a7e066ec5e0d7af740235 (patch)
tree452c8cf901f3323f15c91611700660854e2451cd /toolchain
parent2bf72251224f65511e6c088e5b5635243f448c5a (diff)
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musl: add powerpc soft-float support
Signed-off-by: Felix Fietkau <nbd@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46267 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'toolchain')
-rw-r--r--toolchain/musl/patches/010-Add-PowerPC-soft-float-support.patch141
1 files changed, 141 insertions, 0 deletions
diff --git a/toolchain/musl/patches/010-Add-PowerPC-soft-float-support.patch b/toolchain/musl/patches/010-Add-PowerPC-soft-float-support.patch
new file mode 100644
index 0000000000..7dfb7ed019
--- /dev/null
+++ b/toolchain/musl/patches/010-Add-PowerPC-soft-float-support.patch
@@ -0,0 +1,141 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Wed, 8 Jul 2015 13:56:37 +0200
+Subject: [PATCH] Add PowerPC soft-float support
+
+Some PowerPC CPUs (e.g. Freescale MPC85xx) have a completely different
+instruction set for floating point operations (SPE).
+Executing regular PowerPC floating point instructions results in
+"Illegal instruction" errors.
+
+Until support for SPE FPU is added, make it possible to run these
+devices in soft-float mode.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+ create mode 100644 src/fenv/powerpc-sf/fenv.sub
+ create mode 100644 src/setjmp/powerpc-sf/longjmp.s
+ create mode 100644 src/setjmp/powerpc-sf/longjmp.sub
+ create mode 100644 src/setjmp/powerpc-sf/setjmp.s
+ create mode 100644 src/setjmp/powerpc-sf/setjmp.sub
+
+--- a/configure
++++ b/configure
+@@ -498,6 +498,10 @@ trycppif "_MIPSEL || __MIPSEL || __MIPSE
+ trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf
+ fi
+
++if test "$ARCH" = "powerpc" ; then
++trycppif _SOFT_FLOAT "$t" && SUBARCH=${SUBARCH}-sf
++fi
++
+ test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \
+ && SUBARCH=${SUBARCH}el
+
+--- /dev/null
++++ b/src/fenv/powerpc-sf/fenv.sub
+@@ -0,0 +1 @@
++../fenv.c
+--- /dev/null
++++ b/src/setjmp/powerpc-sf/longjmp.s
+@@ -0,0 +1,47 @@
++ .global _longjmp
++ .global longjmp
++ .type _longjmp,@function
++ .type longjmp,@function
++_longjmp:
++longjmp:
++# void longjmp(jmp_buf env, int val);
++# put val into return register and restore the env saved in setjmp
++# if val(r4) is 0, put 1 there.
++ # 0) move old return address into r0
++ lwz 0, 0(3)
++ # 1) put it into link reg
++ mtlr 0
++ #2 ) restore stack ptr
++ lwz 1, 4(3)
++ #3) restore control reg
++ lwz 0, 8(3)
++ mtcr 0
++ #4) restore r14-r31
++ lwz 14, 12(3)
++ lwz 15, 16(3)
++ lwz 16, 20(3)
++ lwz 17, 24(3)
++ lwz 18, 28(3)
++ lwz 19, 32(3)
++ lwz 20, 36(3)
++ lwz 21, 40(3)
++ lwz 22, 44(3)
++ lwz 23, 48(3)
++ lwz 24, 52(3)
++ lwz 25, 56(3)
++ lwz 26, 60(3)
++ lwz 27, 64(3)
++ lwz 28, 68(3)
++ lwz 29, 72(3)
++ lwz 30, 76(3)
++ lwz 31, 80(3)
++ #5) put val into return reg r3
++ mr 3, 4
++
++ #6) check if return value is 0, make it 1 in that case
++ cmpwi cr7, 4, 0
++ bne cr7, 1f
++ li 3, 1
++1:
++ blr
++
+--- /dev/null
++++ b/src/setjmp/powerpc-sf/longjmp.sub
+@@ -0,0 +1 @@
++longjmp.s
+--- /dev/null
++++ b/src/setjmp/powerpc-sf/setjmp.s
+@@ -0,0 +1,43 @@
++ .global ___setjmp
++ .hidden ___setjmp
++ .global __setjmp
++ .global _setjmp
++ .global setjmp
++ .type __setjmp,@function
++ .type _setjmp,@function
++ .type setjmp,@function
++___setjmp:
++__setjmp:
++_setjmp:
++setjmp:
++ # 0) store IP int 0, then into the jmpbuf pointed to by r3 (first arg)
++ mflr 0
++ stw 0, 0(3)
++ # 1) store reg1 (SP)
++ stw 1, 4(3)
++ # 2) store cr
++ mfcr 0
++ stw 0, 8(3)
++ # 3) store r14-31
++ stw 14, 12(3)
++ stw 15, 16(3)
++ stw 16, 20(3)
++ stw 17, 24(3)
++ stw 18, 28(3)
++ stw 19, 32(3)
++ stw 20, 36(3)
++ stw 21, 40(3)
++ stw 22, 44(3)
++ stw 23, 48(3)
++ stw 24, 52(3)
++ stw 25, 56(3)
++ stw 26, 60(3)
++ stw 27, 64(3)
++ stw 28, 68(3)
++ stw 29, 72(3)
++ stw 30, 76(3)
++ stw 31, 80(3)
++ # 4) set return value to 0
++ li 3, 0
++ # 5) return
++ blr
+--- /dev/null
++++ b/src/setjmp/powerpc-sf/setjmp.sub
+@@ -0,0 +1 @@
++setjmp.s