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| author | Nathan Lynch <nathan_lynch@mentor.com> | 2015-03-25 19:13:16 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-03-27 23:20:45 +0100 |
| commit | 1713ce7c43755fe8b0f31ea317513129bf784909 (patch) | |
| tree | f082086f181ac7ce03324da1d9e2b629c08f6518 /arch/arm/include/asm/elf.h | |
| parent | Linux 4.0-rc1 (diff) | |
| download | linux-1713ce7c43755fe8b0f31ea317513129bf784909.tar.xz linux-1713ce7c43755fe8b0f31ea317513129bf784909.zip | |
ARM: 8329/1: miscellaneous vdso infrastructure, preparation
Define the layout of the data structure shared between kernel and
userspace.
Track the vdso address in the mm_context; needed for communicating
AT_SYSINFO_EHDR to the ELF loader.
Add declarations for arm_install_vdso; implementation is in a
following patch.
Define AT_SYSINFO_EHDR, and, if CONFIG_VDSO=y, report the vdso shared
object address via the ELF auxiliary vector.
Note - this adds the AT_SYSINFO_EHDR in a new user-visible header
asm/auxvec.h; this is consistent with other architectures.
Signed-off-by: Nathan Lynch <nathan_lynch@mentor.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/elf.h')
| -rw-r--r-- | arch/arm/include/asm/elf.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h index afb9cafd3786..ac3f17fb4c8d 100644 --- a/arch/arm/include/asm/elf.h +++ b/arch/arm/include/asm/elf.h @@ -1,7 +1,9 @@ #ifndef __ASMARM_ELF_H #define __ASMARM_ELF_H +#include <asm/auxvec.h> #include <asm/hwcap.h> +#include <asm/vdso_datapage.h> /* * ELF register definitions.. @@ -130,6 +132,13 @@ extern unsigned long arch_randomize_brk(struct mm_struct *mm); #define arch_randomize_brk arch_randomize_brk #ifdef CONFIG_MMU +#ifdef CONFIG_VDSO +#define ARCH_DLINFO \ +do { \ + NEW_AUX_ENT(AT_SYSINFO_EHDR, \ + (elf_addr_t)current->mm->context.vdso); \ +} while (0) +#endif #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 struct linux_binprm; int arch_setup_additional_pages(struct linux_binprm *, int); |