[PATCH v5 21/23] arm64:ilp32: change COMPAT_ELF_PLATFORM to report a a subplatform for ILP32

From: Yury Norov
Date: Tue Sep 29 2015 - 18:20:57 EST

From: Philipp Tomsich <philipp.tomsich@xxxxxxxxxxxxxxxxxxxxx>

To make life for tools (such as gdb) easier when dealing with ILP32 processes,
we report a proper subarchitecture for ILP32 in the ELF auxiliary vectors.

Signed-off-by: Philipp Tomsich <philipp.tomsich@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Christoph Muellner <christoph.muellner@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx>

diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index 9a854f9..8ef8fc5 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -163,9 +163,9 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,

#ifdef __AARCH64EB__
-#define COMPAT_ELF_PLATFORM ("v8b")
+#define COMPAT_ELF_PLATFORM (is_ilp32_compat_task() ? "aarch64_be:ilp32" : "v8b")
-#define COMPAT_ELF_PLATFORM ("v8l")
+#define COMPAT_ELF_PLATFORM (is_ilp32_compat_task() ? "aarch64:ilp32" : "v8l")

#define COMPAT_ELF_ET_DYN_BASE (2 * TASK_SIZE_32 / 3)

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