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Subject[BFIN] Blackfin binfmt_flat patch
This should be applied on top of Luke's Blackfin patches.  It's a small 
enhancement for binfmt_flat; we didn't have enough space in the flat
format for each relocation to store enough data, so this adds a method
to keep data around and use it in a later reloc. This is the minimum
patch to get binfmt_flat working for normal apps on the Blackfin.

Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com>

fs/binfmt_flat.c | 7 +++++--
include/asm-h8300/flat.h | 3 ++-
include/asm-m32r/flat.h | 3 ++-
include/asm-m68knommu/flat.h | 3 ++-
include/asm-sh/flat.h | 3 ++-
include/asm-v850/flat.h | 4 +++-
6 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index a62fd40..c30565f 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -725,6 +725,7 @@ #endif
* __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;

@@ -732,6 +733,8 @@ #endif
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) {
@@ -740,8 +743,8 @@ #endif
}

/* Get the pointer's value. */
- addr = flat_get_addr_from_rp(rp, relval, flags);
- if (addr != 0) {
+ addr = flat_get_addr_from_rp(rp, relval, flags, &persistent);
+ if (addr != 0) {
/*
* Do the relocation. PIC relocs in the data section are
* already in target order
diff --git a/include/asm-h8300/flat.h b/include/asm-h8300/flat.h
index c20eee7..2a87350 100644
--- a/include/asm-h8300/flat.h
+++ b/include/asm-h8300/flat.h
@@ -9,6 +9,7 @@ #define flat_stack_align(sp) /* nothin
#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_reloc_valid(reloc, size) (
*/

#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)
diff --git a/include/asm-m32r/flat.h b/include/asm-m32r/flat.h
index 1b285f6..d851cf0 100644
--- a/include/asm-m32r/flat.h
+++ b/include/asm-m32r/flat.h
@@ -15,9 +15,10 @@ #define __ASM_M32R_FLAT_H
#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) \
diff --git a/include/asm-m68knommu/flat.h b/include/asm-m68knommu/flat.h
index 2d836ed..814b517 100644
--- a/include/asm-m68knommu/flat.h
+++ b/include/asm-m68knommu/flat.h
@@ -9,8 +9,9 @@ #define flat_stack_align(sp) /* nothin
#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__ */
diff --git a/include/asm-sh/flat.h b/include/asm-sh/flat.h
index f29072e..f3081bc 100644
--- a/include/asm-sh/flat.h
+++ b/include/asm-sh/flat.h
@@ -16,8 +16,9 @@ #define flat_stack_align(sp) /* nothin
#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 /* __ASM_SH_FLAT_H */
diff --git a/include/asm-v850/flat.h b/include/asm-v850/flat.h
index 3888f59..17f0ea5 100644
--- a/include/asm-v850/flat.h
+++ b/include/asm-v850/flat.h
@@ -25,6 +25,7 @@ #define flat_reloc_valid(reloc, size) ((
#define flat_stack_align(sp) /* nothing needed */
#define flat_argvp_envp_on_stack() 0
#define flat_old_ram_flag(flags) (flags)
+#define flat_set_persistent(relval, p) 0

/* We store the type of relocation in the top 4 bits of the `relval.' */

@@ -46,7 +47,8 @@ #define FLAT_V850_R_HI16S_LO16 2 /* High
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 flags)
+ unsigned long flags,
+ unsigned long *persistent)
{
short *srp = (short *)rp;
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