From: Bernd Schmidt Date: Wed, 3 Oct 2007 15:41:43 +0000 (+0800) Subject: Binfmt_flat: Add minimum support for the Blackfin relocations X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9720205d1f847cb59e197e851b5276425363f6b;p=linux-2.6 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: Bernd Schmidt Signed-off-by: Bryan Wu Cc: David McCullough Cc: Greg Ungerer Cc: Miles Bader Signed-off-by: Andrew Morton --- diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index 861141b4f6..34e9b06a74 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -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 diff --git a/include/asm-h8300/flat.h b/include/asm-h8300/flat.h index c20eee767d..2a873508a9 100644 --- a/include/asm-h8300/flat.h +++ b/include/asm-h8300/flat.h @@ -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) diff --git a/include/asm-m32r/flat.h b/include/asm-m32r/flat.h index 1b285f65ca..d851cf0c4a 100644 --- a/include/asm-m32r/flat.h +++ b/include/asm-m32r/flat.h @@ -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) \ diff --git a/include/asm-m68knommu/flat.h b/include/asm-m68knommu/flat.h index 2d836edc43..814b5174a8 100644 --- a/include/asm-m68knommu/flat.h +++ b/include/asm-m68knommu/flat.h @@ -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__ */ diff --git a/include/asm-sh/flat.h b/include/asm-sh/flat.h index 0d5cc04ab0..dc4f5950da 100644 --- a/include/asm-sh/flat.h +++ b/include/asm-sh/flat.h @@ -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 */ diff --git a/include/asm-v850/flat.h b/include/asm-v850/flat.h index 3888f59d68..17f0ea5666 100644 --- a/include/asm-v850/flat.h +++ b/include/asm-v850/flat.h @@ -25,6 +25,7 @@ #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 @@ flat_get_relocate_addr (unsigned long relval) 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;