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Groups > linux.kernel > #1372042
| From | Yury Norov <ynorov@caviumnetworks.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 18/25] arm64: ilp32: introduce binfmt_ilp32.c |
| Date | 2016-04-06 00:30 +0200 |
| Message-ID | <rkHDZ-2qu-33@gated-at.bofh.it> (permalink) |
| References | <rkHkD-2hR-23@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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 6bc9738..9dfdf86 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..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
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[RFC6 PATCH v6 00/21] ILP32 for ARM64 Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:10 +0200
[PATCH 17/25] arm64: introduce binfmt_elf32.c Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 21/25] arm64: signal: share lp64 signal routines to ilp32 Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 09/25] arm64: ensure the kernel is compiled for LP64 Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 23/25] arm64: ilp32: introduce ilp32-specific handlers for sigframe and ucontext Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 13/25] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 22/25] arm64: signal32: move ilp32 and aarch32 common code to separated file Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 06/25] compat ABI: use non-compat openat and open_by_handle_at variants Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 15/25] arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 03/25] all: s390: move wrapper infrastructure to generic headers Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 11/25] arm64: change some CONFIG_COMPAT over to use CONFIG_AARCH32_EL0 instead Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 12/25] arm64: compat: change config dependences to aarch32 Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 14/25] thread: move thread bits accessors to separated file Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 10/25] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
Re: [PATCH 10/25] arm64: rename COMPAT to AARCH32_EL0 in Kconfig "Zhangjian (Bamvor)" <bamvor.zhangjian@huawei.com> - 2016-04-14 05:30 +0200
[PATCH 24/25] arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
Re: [PATCH 24/25] arm64:ilp32: add vdso-ilp32 and use for signal return "Zhangjian (Bamvor)" <bamvor.zhangjian@huawei.com> - 2016-04-13 11:30 +0200
Re: [PATCH 24/25] arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov <ynorov@caviumnetworks.com> - 2016-04-13 18:00 +0200
[PATCH 07/25] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 05/25] all: wrap needed syscalls in generic unistd Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 08/25] arm64: ilp32: add documentation on the ILP32 ABI for ARM64 Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 19/25] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 25/25] arm64:ilp32: add ARM64_ILP32 to Kconfig Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 04/25] all: s390: move compat_wrappers.c from arch/s390/kernel to kernel/ Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:20 +0200
[PATCH 18/25] arm64: ilp32: introduce binfmt_ilp32.c Yury Norov <ynorov@caviumnetworks.com> - 2016-04-06 00:30 +0200
Re: [RFC6 PATCH v6 00/21] ILP32 for ARM64 Geert Uytterhoeven <geert@linux-m68k.org> - 2016-04-06 09:00 +0200
Re: [RFC6 PATCH v6 00/21] ILP32 for ARM64 Geert Uytterhoeven <geert@linux-m68k.org> - 2016-04-07 14:30 +0200
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