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>, <linux-doc@vger.kernel.org>,
<linux-arch@vger.kernel.org>, <libc-alpha@sourceware.org>
Cc: <schwidefsky@de.ibm.com>, <heiko.carstens@de.ibm.com>,
<ynorov@caviumnetworks.com>, <pinskia@gmail.com>,
<broonie@kernel.org>, <joseph@codesourcery.com>,
<christoph.muellner@theobroma-systems.com>,
<bamvor.zhangjian@huawei.com>, <szabolcs.nagy@arm.com>,
<klimov.linux@gmail.com>, <Nathan_Lynch@mentor.com>,
<agraf@suse.de>, <Prasun.Kapoor@caviumnetworks.com>,
<kilobyte@angband.pl>, <geert@linux-m68k.org>,
<philipp.tomsich@theobroma-systems.com>,
<manuel.montezelo@gmail.com>, <linyongting@huawei.com>,
<maxim.kuvyrkov@linaro.org>, <davem@davemloft.net>
Subject: [PATCH 11/19] arm64: ilp32: introduce binfmt_ilp32.c
Date: Sat, 18 Jun 2016 02:54:20 +0300 [thread overview]
Message-ID: <1466207668-10549-12-git-send-email-ynorov@caviumnetworks.com> (raw)
In-Reply-To: <1466207668-10549-1-git-send-email-ynorov@caviumnetworks.com>
to handle ILP32 binaries
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
---
arch/arm64/include/asm/elf.h | 6 +++
arch/arm64/kernel/Makefile | 1 +
arch/arm64/kernel/binfmt_ilp32.c | 96 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 103 insertions(+)
create mode 100644 arch/arm64/kernel/binfmt_ilp32.c
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index a967726..4dcbcec 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -174,10 +174,16 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,
#define COMPAT_ELF_ET_DYN_BASE (2 * TASK_SIZE_32 / 3)
+#ifndef USE_AARCH64_GREG
/* AArch32 registers. */
#define COMPAT_ELF_NGREG 18
typedef unsigned int compat_elf_greg_t;
typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
+#else /* AArch64 registers for AARCH64/ILP32 */
+#define COMPAT_ELF_NGREG ELF_NGREG
+#define compat_elf_greg_t elf_greg_t
+#define compat_elf_gregset_t elf_gregset_t
+#endif
/* AArch32 EABI. */
#define EF_ARM_EABI_MASK 0xff000000
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 60d59cb..bcdd4b2 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_ARM64_MODULE_PLTS) += module-plts.o
diff --git a/arch/arm64/kernel/binfmt_ilp32.c b/arch/arm64/kernel/binfmt_ilp32.c
new file mode 100644
index 0000000..416b3f5
--- /dev/null
+++ b/arch/arm64/kernel/binfmt_ilp32.c
@@ -0,0 +1,96 @@
+/*
+ * Support for ILP32 Linux/aarch64 ELF binaries.
+ */
+#define USE_AARCH64_GREG
+
+#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)
+
+#undef ELF_PLATFORM
+#ifdef __AARCH64EB__
+#define ELF_PLATFORM ("aarch64_be:ilp32")
+#else
+#define ELF_PLATFORM ("aarch64:ilp32")
+#endif
+
+#undef ELF_ET_DYN_BASE
+#define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE
+
+#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"
--
2.7.4
next prev parent reply other threads:[~2016-06-17 23:55 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-17 23:54 [RFC nowrap: PATCH v7 00/19] ILP32 for ARM64 Yury Norov
2016-06-17 23:54 ` [PATCH 01/19] compat ABI: use non-compat openat and open_by_handle_at variants Yury Norov
2016-06-27 7:47 ` Andreas Schwab
2016-08-15 14:30 ` Yury Norov
2016-08-25 15:52 ` Arnd Bergmann
2016-08-29 8:43 ` Yury Norov
2016-06-17 23:54 ` [PATCH 02/19] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option Yury Norov
2016-06-17 23:54 ` [PATCH 03/19] arm64: ilp32: add documentation on the ILP32 ABI for ARM64 Yury Norov
2016-06-17 23:54 ` [PATCH 04/19] arm64: ensure the kernel is compiled for LP64 Yury Norov
2016-06-17 23:54 ` [PATCH 05/19] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2016-08-11 7:35 ` Zhangjian (Bamvor)
2016-08-11 8:53 ` Arnd Bergmann
2016-08-11 14:50 ` Catalin Marinas
2016-08-11 15:16 ` Arnd Bergmann
2016-08-11 16:30 ` Catalin Marinas
2016-08-11 20:29 ` Arnd Bergmann
2016-08-12 14:36 ` Catalin Marinas
2016-08-13 15:17 ` Yury Norov
2016-08-15 9:38 ` Catalin Marinas
2016-06-17 23:54 ` [PATCH 06/19] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 Yury Norov
2016-06-17 23:54 ` [PATCH 07/19] thread: move thread bits accessors to separated file Yury Norov
2016-06-17 23:54 ` [PATCH 08/19] arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) Yury Norov
2016-06-21 10:23 ` Zhangjian (Bamvor)
2016-06-21 11:34 ` Andreas Schwab
2016-06-21 15:47 ` Arnd Bergmann
2016-06-17 23:54 ` [PATCH 09/19] arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64 Yury Norov
2016-06-17 23:54 ` [PATCH 10/19] arm64: introduce binfmt_elf32.c Yury Norov
2016-06-17 23:54 ` Yury Norov [this message]
2016-06-17 23:54 ` [PATCH 12/19] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Yury Norov
2016-06-27 4:47 ` zhouchengming
2016-06-27 4:49 ` [PATCH] ilp32: fix {GET,SET}SIGMASK request for ptrace zhouchengming
2016-06-27 5:39 ` Yury Norov
2016-06-27 10:30 ` zhouchengming
2016-08-13 14:52 ` Yury Norov
2016-06-17 23:54 ` [PATCH 13/19] arm64: ilp32: share aarch32 syscall handlers Yury Norov
2016-06-17 23:54 ` [PATCH 14/19] arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Yury Norov
2016-06-20 12:48 ` Yury Norov
2016-06-17 23:54 ` [PATCH 15/19] arm64: signal: share lp64 signal routines to ilp32 Yury Norov
2016-06-17 23:54 ` [PATCH 16/19] arm64: signal32: move ilp32 and aarch32 common code to separated file Yury Norov
2016-06-17 23:54 ` [PATCH 17/19] arm64: ilp32: introduce ilp32-specific handlers for sigframe and ucontext Yury Norov
2016-06-17 23:54 ` [PATCH 18/19] arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov
2016-06-20 14:54 ` Andreas Schwab
2016-08-13 14:54 ` Yury Norov
2016-06-17 23:54 ` [PATCH 19/19] arm64:ilp32: add ARM64_ILP32 to Kconfig Yury Norov
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