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| author | Vincenzo Frascino <vincenzo.frascino@arm.com> | 2019-04-15 11:49:34 +0200 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2019-04-23 19:01:31 +0200 |
| commit | 0d747f6585954d7285a3995058e7dfeae7236cf9 (patch) | |
| tree | 6e0ceb723e3d0d5cbc41d993c3419f58f50cde04 /arch/arm64/include/asm | |
| parent | ACPI/IORT: Reject platform device creation on NUMA node mapping failure (diff) | |
| download | linux-0d747f6585954d7285a3995058e7dfeae7236cf9.tar.xz linux-0d747f6585954d7285a3995058e7dfeae7236cf9.zip | |
arm64: compat: Alloc separate pages for vectors and sigpage
For AArch32 tasks, we install a special "[vectors]" page that contains
the sigreturn trampolines and kuser helpers, which is mapped at a fixed
address specified by the kuser helpers ABI.
Having the sigreturn trampolines in the same page as the kuser helpers
makes it impossible to disable the kuser helpers independently.
Follow the Arm implementation, by moving the signal trampolines out of
the "[vectors]" page and into their own "[sigpage]".
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
[will: tweaked comments and fixed sparse warning]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/elf.h | 6 | ||||
| -rw-r--r-- | arch/arm64/include/asm/signal32.h | 2 |
2 files changed, 3 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h index 6adc1a90e7e6..355d120b78cb 100644 --- a/arch/arm64/include/asm/elf.h +++ b/arch/arm64/include/asm/elf.h @@ -214,10 +214,10 @@ typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG]; set_thread_flag(TIF_32BIT); \ }) #define COMPAT_ARCH_DLINFO -extern int aarch32_setup_vectors_page(struct linux_binprm *bprm, - int uses_interp); +extern int aarch32_setup_additional_pages(struct linux_binprm *bprm, + int uses_interp); #define compat_arch_setup_additional_pages \ - aarch32_setup_vectors_page + aarch32_setup_additional_pages #endif /* CONFIG_COMPAT */ diff --git a/arch/arm64/include/asm/signal32.h b/arch/arm64/include/asm/signal32.h index 81abea0b7650..58e288aaf0ba 100644 --- a/arch/arm64/include/asm/signal32.h +++ b/arch/arm64/include/asm/signal32.h @@ -20,8 +20,6 @@ #ifdef CONFIG_COMPAT #include <linux/compat.h> -#define AARCH32_KERN_SIGRET_CODE_OFFSET 0x500 - int compat_setup_frame(int usig, struct ksignal *ksig, sigset_t *set, struct pt_regs *regs); int compat_setup_rt_frame(int usig, struct ksignal *ksig, sigset_t *set, |