[PATCH] H8/300: pic support

From: Yoshinori Sato <ysato@users.sourceforge.jp>

- add PIC binary support

arch/h8300/kernel/signal.c

@@ -192,6 +192,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *usc, void *fp,
 	regs->er1 = context.sc_er1;
 	regs->er2 = context.sc_er2;
 	regs->er3 = context.sc_er3;
+	regs->er5 = context.sc_er5;
 	regs->ccr = (regs->ccr & 0x10)|(context.sc_ccr & 0xef);
 	regs->pc = context.sc_pc;
 	regs->orig_er0 = -1;		/* disable syscall checks */
@@ -308,6 +309,7 @@ static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
 	sc->sc_er1 = regs->er1;
 	sc->sc_er2 = regs->er2;
 	sc->sc_er3 = regs->er3;
+	sc->sc_er5 = regs->er5;
 	sc->sc_ccr = regs->ccr;
 	sc->sc_pc = regs->pc;
 }
@@ -384,6 +386,7 @@ static void setup_frame (int sig, struct k_sigaction *ka,
 			   ? current_thread_info()->exec_domain->signal_invmap[sig]
 		          : sig);
 	regs->er1 = (unsigned long)&(frame->sc);
+	regs->er5 = current->mm->start_data;	/* GOT base */
 
 	return;
 
@@ -435,6 +438,7 @@ static void setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
 		     : sig);
 	regs->er1 = (unsigned long)&(frame->info);
 	regs->er2 = (unsigned long)&frame->uc;
+	regs->er5 = current->mm->start_data;	/* GOT base */
 
 	return;
 

fs/binfmt_flat.c

@@ -723,7 +723,7 @@ static int load_flat_file(struct linux_binprm * bprm,
 				return -ENOEXEC;
 
 			/* Get the pointer's value.  */
-			addr = flat_get_addr_from_rp(rp, relval);
+			addr = flat_get_addr_from_rp(rp, relval, flags);
 			if (addr != 0) {
 				/*
 				 * Do the relocation.  PIC relocs in the data section are

include/asm-h8300/flat.h

@@ -18,7 +18,8 @@
  */
 
 #define	flat_get_relocate_addr(rel)		(rel)
-#define flat_get_addr_from_rp(rp, relval)       (get_unaligned(rp) & 0x0ffffff)
+#define flat_get_addr_from_rp(rp, relval, flags) \
+        (get_unaligned(rp) & ((flags & FLAT_FLAG_GOTPIC) ? 0xffffffff: 0x00ffffff))
 #define flat_put_addr_at_rp(rp, addr, rel) \
 	put_unaligned (((*(char *)(rp)) << 24) | ((addr) & 0x00ffffff), rp)
 

include/asm-h8300/processor.h

@@ -23,12 +23,12 @@
 #include <asm/ptrace.h>
 #include <asm/current.h>
 
-extern inline unsigned long rdusp(void) {
+static inline unsigned long rdusp(void) {
 	extern unsigned int	sw_usp;
 	return(sw_usp);
 }
 
-extern inline void wrusp(unsigned long usp) {
+static inline void wrusp(unsigned long usp) {
 	extern unsigned int	sw_usp;
 	sw_usp = usp;
 }
@@ -61,9 +61,15 @@ struct thread_struct {
 	} breakinfo;
 };
 
-#define INIT_THREAD  { \
-	sizeof(init_stack) + (unsigned long) init_stack, 0, \
-	PS_S,  0, {(unsigned short *)-1, 0}, \
+#define INIT_THREAD  {						\
+	.ksp  = sizeof(init_stack) + (unsigned long)init_stack, \
+	.usp  = 0,						\
+	.ccr  = PS_S,						\
+	.esp0 = 0,						\
+	.breakinfo = {						\
+		.addr = (unsigned short *)-1,			\
+		.inst = 0					\
+	}							\
 }
 
 /*
@@ -78,6 +84,7 @@ do {							        \
 	set_fs(USER_DS);           /* reads from user space */  \
   	(_regs)->pc = (_pc);				        \
 	(_regs)->ccr &= 0x00;	   /* clear kernel flag */      \
+	(_regs)->er5 = current->mm->start_data;	/* GOT base */  \
 	wrusp((unsigned long)(_usp) - sizeof(unsigned long)*3);	\
 } while(0)
 #endif
@@ -88,6 +95,7 @@ do {							        \
 	(_regs)->pc = (_pc);				        \
 	(_regs)->ccr = 0x00;	   /* clear kernel flag */      \
 	(_regs)->exr = 0x78;       /* enable all interrupts */  \
+	(_regs)->er5 = current->mm->start_data;	/* GOT base */  \
 	/* 14 = space for retaddr(4), vector(4), er0(4) and ext(2) on stack */ \
 	wrusp(((unsigned long)(_usp)) - 14);                    \
 } while(0)

include/asm-m68knommu/flat.h

@@ -9,7 +9,7 @@
 #define	flat_argvp_envp_on_stack()		1
 #define	flat_old_ram_flag(flags)		(flags)
 #define	flat_reloc_valid(reloc, size)		((reloc) <= (size))
-#define	flat_get_addr_from_rp(rp, relval)	get_unaligned(rp)
+#define	flat_get_addr_from_rp(rp, relval, flags)	get_unaligned(rp)
 #define	flat_put_addr_at_rp(rp, val, relval)	put_unaligned(val,rp)
 #define	flat_get_relocate_addr(rel)		(rel)
 

include/asm-sh/flat.h

@@ -16,7 +16,7 @@
 #define	flat_argvp_envp_on_stack()		1
 #define	flat_old_ram_flag(flags)		(flags)
 #define	flat_reloc_valid(reloc, size)		((reloc) <= (size))
-#define	flat_get_addr_from_rp(rp, relval)	get_unaligned(rp)
+#define	flat_get_addr_from_rp(rp, relval, flags)	get_unaligned(rp)
 #define	flat_put_addr_at_rp(rp, val, relval)	put_unaligned(val,rp)
 #define	flat_get_relocate_addr(rel)		(rel)
 

include/asm-v850/flat.h

@@ -45,7 +45,8 @@ flat_get_relocate_addr (unsigned long relval)
    RELVAL is the raw relocation-table entry from which RP is derived.
    For the v850, RP should always be half-word aligned.  */
 static inline unsigned long flat_get_addr_from_rp (unsigned long *rp,
-						   unsigned long relval)
+						   unsigned long relval,
+						   unsigned long flags)
 {
 	short *srp = (short *)rp;