From: Yury Norov <ynorov@caviumnetworks.com>
To: <arnd@arndb.de>, <catalin.marinas@arm.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Cc: <schwidefsky@de.ibm.com>, <heiko.carstens@de.ibm.com>,
<ynorov@caviumnetworks.com>, <pinskia@gmail.com>,
<Prasun.Kapoor@caviumnetworks.com>, <schwab@suse.de>,
<Nathan_Lynch@mentor.com>, <agraf@suse.de>,
<klimov.linux@gmail.com>, <broonie@kernel.org>,
<jan.dakinevich@gmail.com>, <joseph@codesourcery.com>,
<christoph.muellner@theobroma-systems.com>
Subject: [PATCH v6 11/21] arm64: ilp32: introduce binfmt_ilp32.c
Date: Thu, 14 Jan 2016 20:23:08 +0300 [thread overview]
Message-ID: <1452792198-10718-12-git-send-email-ynorov@caviumnetworks.com> (raw)
In-Reply-To: <1452792198-10718-1-git-send-email-ynorov@caviumnetworks.com>
to handle ILP32 binaries
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
---
arch/arm64/kernel/Makefile | 1 +
arch/arm64/kernel/binfmt_ilp32.c | 91 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 92 insertions(+)
create mode 100644 arch/arm64/kernel/binfmt_ilp32.c
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index f1b798a..ad7158c 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -28,6 +28,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \
sys_compat.o entry32.o \
../../arm/kernel/opcodes.o binfmt_elf32.o
+arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o
arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o
arm64-obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o
diff --git a/arch/arm64/kernel/binfmt_ilp32.c b/arch/arm64/kernel/binfmt_ilp32.c
new file mode 100644
index 0000000..a934fd4
--- /dev/null
+++ b/arch/arm64/kernel/binfmt_ilp32.c
@@ -0,0 +1,91 @@
+/*
+ * Support for ILP32 Linux/aarch64 ELF binaries.
+ */
+
+#include <linux/elfcore-compat.h>
+#include <linux/time.h>
+
+#undef ELF_CLASS
+#define ELF_CLASS ELFCLASS32
+
+#undef elfhdr
+#undef elf_phdr
+#undef elf_shdr
+#undef elf_note
+#undef elf_addr_t
+#define elfhdr elf32_hdr
+#define elf_phdr elf32_phdr
+#define elf_shdr elf32_shdr
+#define elf_note elf32_note
+#define elf_addr_t Elf32_Addr
+
+/*
+ * Some data types as stored in coredump.
+ */
+#define user_long_t compat_long_t
+#define user_siginfo_t compat_siginfo_t
+#define copy_siginfo_to_user copy_siginfo_to_user32
+
+/*
+ * The machine-dependent core note format types are defined in elfcore-compat.h,
+ * which requires asm/elf.h to define compat_elf_gregset_t et al.
+ */
+#define elf_prstatus compat_elf_prstatus
+#define elf_prpsinfo compat_elf_prpsinfo
+
+/*
+ * Compat version of cputime_to_compat_timeval, perhaps this
+ * should be an inline in <linux/compat.h>.
+ */
+static void cputime_to_compat_timeval(const cputime_t cputime,
+ struct compat_timeval *value)
+{
+ struct timeval tv;
+ cputime_to_timeval(cputime, &tv);
+ value->tv_sec = tv.tv_sec;
+ value->tv_usec = tv.tv_usec;
+}
+
+#undef cputime_to_timeval
+#define cputime_to_timeval cputime_to_compat_timeval
+
+/* AARCH64 ILP32 EABI. */
+#undef elf_check_arch
+#define elf_check_arch(x) (((x)->e_machine == EM_AARCH64) \
+ && (x)->e_ident[EI_CLASS] == ELFCLASS32)
+
+#undef SET_PERSONALITY
+#define SET_PERSONALITY(ex) \
+do { \
+ set_thread_flag(TIF_32BIT_AARCH64); \
+ clear_thread_flag(TIF_32BIT); \
+} while (0)
+
+#undef ARCH_DLINFO
+#define ARCH_DLINFO \
+do { \
+ NEW_AUX_ENT(AT_SYSINFO_EHDR, \
+ (elf_addr_t)(long)current->mm->context.vdso); \
+} while (0)
+
+#ifdef __AARCH64EB__
+#define COMPAT_ELF_PLATFORM ("aarch64_be:ilp32")
+#else
+#define COMPAT_ELF_PLATFORM ("aarch64:ilp32")
+#endif
+
+#undef ELF_HWCAP
+#undef ELF_HWCAP2
+#define ELF_HWCAP ((u32) elf_hwcap)
+#define ELF_HWCAP2 ((u32) (elf_hwcap >> 32))
+
+/*
+ * Rename a few of the symbols that binfmt_elf.c will define.
+ * These are all local so the names don't really matter, but it
+ * might make some debugging less confusing not to duplicate them.
+ */
+#define elf_format compat_elf_format
+#define init_elf_binfmt init_compat_elf_binfmt
+#define exit_elf_binfmt exit_compat_elf_binfmt
+
+#include "../../../fs/binfmt_elf.c"
--
2.5.0
next prev parent reply other threads:[~2016-01-14 17:26 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-14 17:22 [RFC5 PATCH v6 00/21] ILP32 for ARM64 Yury Norov
2016-01-14 17:22 ` [PATCH v6 01/21] arm64: ilp32: add documentation on the ILP32 ABI " Yury Norov
2016-01-14 17:22 ` [PATCH v6 02/21] arm64: ensure the kernel is compiled for LP64 Yury Norov
2016-01-14 17:23 ` [PATCH v6 03/21] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2016-01-14 17:23 ` [PATCH v6 04/21] arm64: change some CONFIG_COMPAT over to use CONFIG_AARCH32_EL0 instead Yury Norov
2016-01-14 17:23 ` [PATCH v6 05/21] arm64: compat: change config dependences to aarch32 Yury Norov
2016-01-14 17:23 ` [PATCH v6 06/21] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 Yury Norov
2016-01-14 17:23 ` [PATCH v6 07/21] thread: move thread bits accessors to separated file Yury Norov
2016-01-14 17:23 ` [PATCH v6 08/21] arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) Yury Norov
2016-01-14 17:23 ` [PATCH v6 09/21] arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64 Yury Norov
2016-01-14 17:23 ` [PATCH v6 10/21] arm64: introduce binfmt_elf32.c Yury Norov
2016-01-14 17:23 ` Yury Norov [this message]
2016-01-14 17:23 ` [PATCH v6 12/21] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Yury Norov
2016-01-14 17:23 ` [PATCH v6 13/21] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Yury Norov
2016-01-14 17:23 ` [PATCH v6 14/21] arm64: signal: wrap struct ucontext, fp and lr with struct sigframe Yury Norov
2016-01-14 17:23 ` [PATCH v6 15/21] arm64: signal: share lp64 signal routines to ilp32 Yury Norov
2016-01-14 17:23 ` [PATCH v6 16/21] arm64: signal32: move ilp32 and aarch32 common code to separated file Yury Norov
2016-01-14 17:23 ` [PATCH v6 17/21] arm64: ilp32: introduce ilp32-specific handlers for sigframe Yury Norov
2016-02-29 8:27 ` Andreas Schwab
2016-01-14 17:23 ` [PATCH v6 18/21] arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov
2016-01-14 17:23 ` [PATCH v6 19/21] arm64:ilp32: add ARM64_ILP32 to Kconfig Yury Norov
2016-01-14 17:23 ` [PATCH v6 20/21] all: s390: make compat wrappers the generic solution Yury Norov
2016-01-14 18:11 ` Yury Norov
2016-01-15 12:46 ` Heiko Carstens
2016-01-19 17:52 ` Yury Norov
2016-01-20 8:16 ` Heiko Carstens
2016-01-20 12:17 ` Yury Norov
2016-01-14 17:23 ` [PATCH v6 21/21] arm64: ilp32: wrap syscalls to remove top 32-bit vulnerability Yury Norov
2016-01-18 13:18 ` [RFC5 PATCH v6 00/21] ILP32 for ARM64 Zhangjian (Bamvor)
2016-01-18 13:26 ` Andreas Schwab
2016-01-18 13:41 ` Bamvor Zhang Jian
2016-01-29 9:59 ` Zhangjian (Bamvor)
2016-01-29 17:09 ` Yury Norov
2016-01-30 4:15 ` Zhangjian (Bamvor)
2016-02-18 22:35 ` Yury Norov
2016-02-19 8:23 ` Arnd Bergmann
2016-02-19 12:59 ` Yury Norov
2016-02-19 14:06 ` Arnd Bergmann
2016-02-29 15:39 ` Yury Norov
2016-02-29 16:00 ` Andreas Schwab
2016-02-29 16:30 ` Arnd Bergmann
2016-02-25 10:50 ` Andreas Schwab
2016-02-25 20:28 ` Yury Norov
2016-03-18 10:28 ` Zhangjian (Bamvor)
2016-03-18 15:49 ` Yury Norov
2016-03-18 15:55 ` Alexander Graf
2016-03-18 16:46 ` Yury Norov
2016-03-20 8:12 ` Zhangjian (Bamvor)
2016-03-21 11:23 ` Zhangjian (Bamvor)
2016-03-21 18:43 ` Yury Norov
2016-03-22 1:49 ` Yury Norov
2016-03-21 9:07 ` Andreas Schwab
2016-03-21 9:43 ` Arnd Bergmann
2016-03-21 10:52 ` Andreas Schwab
2016-03-21 17:02 ` Arnd Bergmann
2016-03-26 12:36 ` Zhangjian (Bamvor)
2016-03-29 10:58 ` Arnd Bergmann
2016-03-29 12:01 ` Yury Norov
2016-03-29 12:42 ` Arnd Bergmann
2016-03-29 13:21 ` Zhangjian (Bamvor)
2016-03-29 13:27 ` Arnd Bergmann
2016-03-29 15:54 ` Joseph Myers
2016-03-29 19:30 ` Arnd Bergmann
2016-03-29 20:15 ` Joseph Myers
2016-03-29 20:24 ` Arnd Bergmann
2016-03-29 21:00 ` Joseph Myers
2016-03-29 21:39 ` Arnd Bergmann
2016-03-31 7:35 ` Zhangjian (Bamvor)
2016-03-21 18:40 ` Yury Norov
2016-03-26 13:08 ` Zhangjian (Bamvor)
2016-03-26 13:45 ` Zhangjian (Bamvor)
2016-03-26 22:46 ` Yury Norov
-- strict thread matches above, loose matches on Subject: below --
2016-01-07 23:34 [RFC4 " Yury Norov
2016-01-07 23:34 ` [PATCH v6 11/21] arm64: ilp32: introduce binfmt_ilp32.c Yury Norov
2016-01-07 23:45 ` Yury Norov
2016-01-08 9:08 ` Arnd Bergmann
2016-01-12 16:46 ` Yury Norov
2016-01-12 23:05 ` Arnd Bergmann
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