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ARM: 7324/1: modpost: Fix section warnings for ARM for many compilers

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It turns out that many compilers don't show section warnings on ARM
currently because handling for ARM_CALL relocs are missing from
modpost.c.

Based on commit c2e26114 ([ARM] 3205/1: Handle new EABI relocations when
loading kernel modules) it seems that R_ARM_PC24, R_ARM_CALL and
R_ARM_JUMP24 can be handled the same way.

Note that at least Debian libc6-dev is missing defines for both
R_ARM_CALL and R_ARM_JUMP24 in /usr/include/elf.h. So for now
we need to define them in modpost.c if not defined.

Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: Anders Kaseorg <andersk@ksplice.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Tony Lindgren 2012-02-14 21:58:56 +01:00 committed by Russell King
parent 08a183f02b
commit 6e2e340b59
1 changed files with 9 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

9
scripts/mod/modpost.c
View file

@ -1494,6 +1494,13 @@ static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
return 0; return 0;
} }
#ifndef R_ARM_CALL
#define R_ARM_CALL 28
#endif
#ifndef R_ARM_JUMP24
#define R_ARM_JUMP24 29
#endif
static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r) static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
{ {
unsigned int r_typ = ELF_R_TYPE(r->r_info); unsigned int r_typ = ELF_R_TYPE(r->r_info);
@ -1505,6 +1512,8 @@ static int addend_arm_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
(elf->symtab_start + ELF_R_SYM(r->r_info)); (elf->symtab_start + ELF_R_SYM(r->r_info));
break; break;
case R_ARM_PC24: case R_ARM_PC24:
case R_ARM_CALL:
case R_ARM_JUMP24:
/* From ARM ABI: ((S + A) | T) - P */ /* From ARM ABI: ((S + A) | T) - P */
r->r_addend = (int)(long)(elf->hdr + r->r_addend = (int)(long)(elf->hdr +
sechdr->sh_offset + sechdr->sh_offset +