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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/mmu.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/mmu.h')
| -rw-r--r-- | arch/arm/include/asm/mmu.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/include/asm/mmu.h b/arch/arm/include/asm/mmu.h index 64fd15159b7d..a5b47421059d 100644 --- a/arch/arm/include/asm/mmu.h +++ b/arch/arm/include/asm/mmu.h @@ -11,6 +11,9 @@ typedef struct { #endif unsigned int vmalloc_seq; unsigned long sigpage; +#ifdef CONFIG_VDSO + unsigned long vdso; +#endif } mm_context_t; #ifdef CONFIG_CPU_HAS_ASID |