Commit f9720205 authored by Bernd Schmidt's avatar Bernd Schmidt Committed by Bryan Wu
Browse files

Binfmt_flat: Add minimum support for the Blackfin relocations 



Add minimum support for the Blackfin relocations, since we don't have
enough space in each reloc.  The idea is to store a value with one
relocation so that subsequent ones can access it.

Actually, this patch is required for Blackfin.  Currently if BINFMT_FLAT is
enabled, git-tree kernel will fail to compile.

Signed-off-by: default avatarBernd Schmidt <bernd.schmidt@analog.com>
Signed-off-by: default avatarBryan Wu <bryan.wu@analog.com>
Cc: David McCullough <davidm@snapgear.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Cc: Miles Bader <miles.bader@necel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent f778089c

fs/binfmt_flat.c

+4 −1
Original line number Diff line number Diff line
@@ -742,6 +742,7 @@ static int load_flat_file(struct linux_binprm * bprm, 
	 * __start to address 4 so that is okay).

	 */

	if (rev > OLD_FLAT_VERSION) {

		unsigned long persistent = 0;

		for (i=0; i < relocs; i++) {

			unsigned long addr, relval;
@@ -749,6 +750,8 @@ static int load_flat_file(struct linux_binprm * bprm, 
			   relocated (of course, the address has to be

			   relocated first).  */

			relval = ntohl(reloc[i]);

			if (flat_set_persistent (relval, &persistent))

				continue;

			addr = flat_get_relocate_addr(relval);

			rp = (unsigned long *) calc_reloc(addr, libinfo, id, 1);

			if (rp == (unsigned long *)RELOC_FAILED) {
@@ -757,7 +760,7 @@ static int load_flat_file(struct linux_binprm * bprm, 
			}



			/* Get the pointer's value.  */

			addr = flat_get_addr_from_rp(rp, relval, flags);

			addr = flat_get_addr_from_rp(rp, relval, flags, &persistent);

			if (addr != 0) {

				/*

				 * Do the relocation.  PIC relocs in the data section are

include/asm-h8300/flat.h

+2 −1
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ 
#define	flat_argvp_envp_on_stack()		1

#define	flat_old_ram_flag(flags)		1

#define	flat_reloc_valid(reloc, size)		((reloc) <= (size))

#define	flat_set_persistent(relval, p)		0



/*

 * on the H8 a couple of the relocations have an instruction in the
@@ -18,7 +19,7 @@ 
 */



#define	flat_get_relocate_addr(rel)		(rel)

#define flat_get_addr_from_rp(rp, relval, flags) \

#define flat_get_addr_from_rp(rp, relval, flags, persistent) \

        (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-m32r/flat.h

+2 −1
Original line number Diff line number Diff line
@@ -15,9 +15,10 @@ 
#define	flat_stack_align(sp)		(*sp += (*sp & 3 ? (4 - (*sp & 3)): 0))

#define	flat_argvp_envp_on_stack()		0

#define	flat_old_ram_flag(flags)		(flags)

#define	flat_set_persistent(relval, p)		0

#define	flat_reloc_valid(reloc, size)		\

	(((reloc) - textlen_for_m32r_lo16_data) <= (size))

#define flat_get_addr_from_rp(rp, relval, flags) \

#define flat_get_addr_from_rp(rp, relval, flags, persistent) \

	m32r_flat_get_addr_from_rp(rp, relval, (text_len) )



#define flat_put_addr_at_rp(rp, addr, relval) \

include/asm-m68knommu/flat.h

+2 −1
Original line number Diff line number Diff line
@@ -9,8 +9,9 @@ 
#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, flags)	get_unaligned(rp)

#define	flat_get_addr_from_rp(rp, relval, flags, p)	get_unaligned(rp)

#define	flat_put_addr_at_rp(rp, val, relval)	put_unaligned(val,rp)

#define	flat_get_relocate_addr(rel)		(rel)

#define	flat_set_persistent(relval, p)		0



#endif /* __M68KNOMMU_FLAT_H__ */

include/asm-sh/flat.h

+2 −1
Original line number Diff line number Diff line
@@ -16,8 +16,9 @@ 
#define	flat_argvp_envp_on_stack()		0

#define	flat_old_ram_flag(flags)		(flags)

#define	flat_reloc_valid(reloc, size)		((reloc) <= (size))

#define	flat_get_addr_from_rp(rp, relval, flags)	get_unaligned(rp)

#define	flat_get_addr_from_rp(rp, relval, flags, p)	get_unaligned(rp)

#define	flat_put_addr_at_rp(rp, val, relval)	put_unaligned(val,rp)

#define	flat_get_relocate_addr(rel)		(rel)

#define	flat_set_persistent(relval, p)		0



#endif /* __ASM_SH_FLAT_H */

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