Fix register layout in o32 core dumps on 64-bit systems.

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/kernel/binfmt_elfo32.c

@@ -98,7 +98,7 @@ struct elf_prpsinfo32
 #define init_elf_binfmt init_elf32_binfmt
 
 #define jiffies_to_timeval jiffies_to_compat_timeval
-static __inline__ void
+static inline void
 jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
 {
 	/*
@@ -113,21 +113,26 @@ jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)
 #undef ELF_CORE_COPY_REGS
 #define ELF_CORE_COPY_REGS(_dest,_regs) elf32_core_copy_regs(_dest,_regs);
 
-void elf32_core_copy_regs(elf_gregset_t _dest, struct pt_regs *_regs)
+void elf32_core_copy_regs(elf_gregset_t grp, struct pt_regs *regs)
 {
 	int i;
 
-	memset(_dest, 0, sizeof(elf_gregset_t));
-
-	/* XXXKW the 6 is from EF_REG0 in gdb/gdb/mips-linux-tdep.c, include/asm-mips/reg.h */
-	for (i=6; i<38; i++)
-		_dest[i] = (elf_greg_t) _regs->regs[i-6];
-	_dest[i++] = (elf_greg_t) _regs->lo;
-	_dest[i++] = (elf_greg_t) _regs->hi;
-	_dest[i++] = (elf_greg_t) _regs->cp0_epc;
-	_dest[i++] = (elf_greg_t) _regs->cp0_badvaddr;
-	_dest[i++] = (elf_greg_t) _regs->cp0_status;
-	_dest[i++] = (elf_greg_t) _regs->cp0_cause;
+	for (i = 0; i < EF_R0; i++)
+		grp[i] = 0;
+	grp[EF_R0] = 0;
+	for (i = 1; i <= 31; i++)
+		grp[EF_R0 + i] = (elf_greg_t) regs->regs[i];
+	grp[EF_R26] = 0;
+	grp[EF_R27] = 0;
+	grp[EF_LO] = (elf_greg_t) regs->lo;
+	grp[EF_HI] = (elf_greg_t) regs->hi;
+	grp[EF_CP0_EPC] = (elf_greg_t) regs->cp0_epc;
+	grp[EF_CP0_BADVADDR] = (elf_greg_t) regs->cp0_badvaddr;
+	grp[EF_CP0_STATUS] = (elf_greg_t) regs->cp0_status;
+	grp[EF_CP0_CAUSE] = (elf_greg_t) regs->cp0_cause;
+#ifdef EF_UNUSED0
+	grp[EF_UNUSED0] = 0;
+#endif
 }
 
 MODULE_DESCRIPTION("Binary format loader for compatibility with o32 Linux/MIPS binaries");