sh: Provide a FLAT_PLAT_INIT() definition.

SH needs this in order to make sure that r4 has a sane value at process
entry time, which the libc expects has already been taken care of.

Fixes random crashes in flat binaries.

Signed-off-by: Takashi YOSHII <yoshii.takashi@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/sh/include/asm/flat.h b/arch/sh/include/asm/flat.h
index 0cc800299e06..d3b2b4f109e3 100644
--- a/arch/sh/include/asm/flat.h
+++ b/arch/sh/include/asm/flat.h
@@ -21,4 +21,11 @@
 #define flat_get_relocate_addr(rel)             (rel)
 #define flat_set_persistent(relval, p)          ({ (void)p; 0; })
 
+#define FLAT_PLAT_INIT(_r) \
+  do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \
+       _r->regs[4]=0; _r->regs[5]=0; _r->regs[6]=0; _r->regs[7]=0; \
+       _r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \
+       _r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; \
+       _r->sr = SR_FD; } while (0)
+
 #endif /* __ASM_SH_FLAT_H */