From e5bb165bed7be4176914672d25ff8e286b6fba49 Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <nsz@port70.net>
Date: Mon, 24 Feb 2014 23:16:29 +0100
Subject: mips: add mips-sf subarch support (soft-float)

Userspace emulated floating-point (gcc -msoft-float) is not compatible
with the default mips abi (assumes an FPU or in kernel emulation of it).
Soft vs hard float abi should not be mixed, __mips_soft_float is checked
in musl's configure script and there is no runtime check. The -sf subarch
does not save/restore floating-point registers in setjmp/longjmp and only
provides dummy fenv implementation.
---
 arch/mips/bits/fenv.h | 5 +++++
 arch/mips/reloc.h     | 8 +++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

(limited to 'arch/mips')

diff --git a/arch/mips/bits/fenv.h b/arch/mips/bits/fenv.h
index b2a6db9a..589e71c1 100644
--- a/arch/mips/bits/fenv.h
+++ b/arch/mips/bits/fenv.h
@@ -1,3 +1,7 @@
+#ifdef __mips_soft_float
+#define FE_ALL_EXCEPT 0
+#define FE_TONEAREST  0
+#else
 #define FE_INEXACT    4
 #define FE_UNDERFLOW  8
 #define FE_OVERFLOW   16
@@ -10,6 +14,7 @@
 #define FE_TOWARDZERO 1
 #define FE_UPWARD     2
 #define FE_DOWNWARD   3
+#endif
 
 typedef unsigned short fexcept_t;
 
diff --git a/arch/mips/reloc.h b/arch/mips/reloc.h
index 07fa10a7..4ca81257 100644
--- a/arch/mips/reloc.h
+++ b/arch/mips/reloc.h
@@ -8,7 +8,13 @@
 #define ENDIAN_SUFFIX ""
 #endif
 
-#define LDSO_ARCH "mips" ENDIAN_SUFFIX
+#ifdef __mips_soft_float
+#define FP_SUFFIX "-sf"
+#else
+#define FP_SUFFIX ""
+#endif
+
+#define LDSO_ARCH "mips" ENDIAN_SUFFIX FP_SUFFIX
 
 #define IS_COPY(x) ((x)==R_MIPS_COPY)
 #define IS_PLT(x) 1
-- 
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