arm64: ELF definitions

This patch adds definitions for the ELF format, including personality
personality setting and EXEC_PAGESIZE. The are only two hwcap
definitions for 64-bit applications - HWCAP_FP and HWCAP_ASIMD.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

5 files changed, 305 insertions, 0 deletions

diff --git a/arch/arm64/include/asm/auxvec.h b/arch/arm64/include/asm/auxvec.h
new file mode 100644
index 000000000000..22d6d8885854
--- /dev/null
+++ b/arch/arm64/include/asm/auxvec.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_AUXVEC_H
+#define __ASM_AUXVEC_H
+
+/* vDSO location */
+#define AT_SYSINFO_EHDR 33
+
+#endif
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
new file mode 100644
index 000000000000..cf284649dfcb
--- /dev/null
+++ b/arch/arm64/include/asm/elf.h
@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_ELF_H
+#define __ASM_ELF_H
+
+#include <asm/hwcap.h>
+
+/*
+ * ELF register definitions..
+ */
+#include <asm/ptrace.h>
+#include <asm/user.h>
+
+typedef unsigned long elf_greg_t;
+typedef unsigned long elf_freg_t[3];
+
+#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+typedef struct user_fp elf_fpregset_t;
+
+#define EM_AARCH64              183
+
+/*
+ * AArch64 static relocation types.
+ */
+
+/* Miscellaneous. */
+#define R_ARM_NONE                      0
+#define R_AARCH64_NONE                  256
+
+/* Data. */
+#define R_AARCH64_ABS64                 257
+#define R_AARCH64_ABS32                 258
+#define R_AARCH64_ABS16                 259
+#define R_AARCH64_PREL64                260
+#define R_AARCH64_PREL32                261
+#define R_AARCH64_PREL16                262
+
+/* Instructions. */
+#define R_AARCH64_MOVW_UABS_G0          263
+#define R_AARCH64_MOVW_UABS_G0_NC       264
+#define R_AARCH64_MOVW_UABS_G1          265
+#define R_AARCH64_MOVW_UABS_G1_NC       266
+#define R_AARCH64_MOVW_UABS_G2          267
+#define R_AARCH64_MOVW_UABS_G2_NC       268
+#define R_AARCH64_MOVW_UABS_G3          269
+
+#define R_AARCH64_MOVW_SABS_G0          270
+#define R_AARCH64_MOVW_SABS_G1          271
+#define R_AARCH64_MOVW_SABS_G2          272
+
+#define R_AARCH64_LD_PREL_LO19          273
+#define R_AARCH64_ADR_PREL_LO21         274
+#define R_AARCH64_ADR_PREL_PG_HI21      275
+#define R_AARCH64_ADR_PREL_PG_HI21_NC   276
+#define R_AARCH64_ADD_ABS_LO12_NC       277
+#define R_AARCH64_LDST8_ABS_LO12_NC     278
+
+#define R_AARCH64_TSTBR14               279
+#define R_AARCH64_CONDBR19              280
+#define R_AARCH64_JUMP26                282
+#define R_AARCH64_CALL26                283
+#define R_AARCH64_LDST16_ABS_LO12_NC    284
+#define R_AARCH64_LDST32_ABS_LO12_NC    285
+#define R_AARCH64_LDST64_ABS_LO12_NC    286
+#define R_AARCH64_LDST128_ABS_LO12_NC   299
+
+#define R_AARCH64_MOVW_PREL_G0          287
+#define R_AARCH64_MOVW_PREL_G0_NC       288
+#define R_AARCH64_MOVW_PREL_G1          289
+#define R_AARCH64_MOVW_PREL_G1_NC       290
+#define R_AARCH64_MOVW_PREL_G2          291
+#define R_AARCH64_MOVW_PREL_G2_NC       292
+#define R_AARCH64_MOVW_PREL_G3          293
+
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_CLASS       ELFCLASS64
+#define ELF_DATA        ELFDATA2LSB
+#define ELF_ARCH        EM_AARCH64
+
+#define ELF_PLATFORM_SIZE       16
+#define ELF_PLATFORM            ("aarch64")
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x)               ((x)->e_machine == EM_AARCH64)
+
+#define elf_read_implies_exec(ex,stk)   (stk != EXSTACK_DISABLE_X)
+
+#define CORE_DUMP_USE_REGSET
+#define ELF_EXEC_PAGESIZE       PAGE_SIZE
+
+/*
+ * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
+ * use of this is to invoke "./ld.so someprog" to test out a new version of
+ * the loader.  We need to make sure that it is out of the way of the program
+ * that it will "exec", and that there is sufficient room for the brk.
+ */
+extern unsigned long randomize_et_dyn(unsigned long base);
+#define ELF_ET_DYN_BASE (randomize_et_dyn(2 * TASK_SIZE_64 / 3))
+
+/*
+ * When the program starts, a1 contains a pointer to a function to be
+ * registered with atexit, as per the SVR4 ABI.  A value of 0 means we have no
+ * such handler.
+ */
+#define ELF_PLAT_INIT(_r, load_addr)    (_r)->regs[0] = 0
+
+#define SET_PERSONALITY(ex)             clear_thread_flag(TIF_32BIT);
+
+#define ARCH_DLINFO                                                     \
+do {                                                                    \
+        NEW_AUX_ENT(AT_SYSINFO_EHDR,                                    \
+                    (elf_addr_t)current->mm->context.vdso);             \
+} while (0)
+
+#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
+struct linux_binprm;
+extern int arch_setup_additional_pages(struct linux_binprm *bprm,
+                                       int uses_interp);
+
+/* 1GB of VA */
+#ifdef CONFIG_COMPAT
+#define STACK_RND_MASK                  (test_thread_flag(TIF_32BIT) ? \
+                                                0x7ff >> (PAGE_SHIFT - 12) : \
+                                                0x3ffff >> (PAGE_SHIFT - 12))
+#else
+#define STACK_RND_MASK                  (0x3ffff >> (PAGE_SHIFT - 12))
+#endif
+
+struct mm_struct;
+extern unsigned long arch_randomize_brk(struct mm_struct *mm);
+#define arch_randomize_brk arch_randomize_brk
+
+#ifdef CONFIG_COMPAT
+#define EM_ARM                          40
+#define COMPAT_ELF_PLATFORM             ("v8l")
+
+#define COMPAT_ELF_ET_DYN_BASE          (randomize_et_dyn(2 * TASK_SIZE_32 / 3))
+
+/* 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];
+
+/* AArch32 EABI. */
+#define EF_ARM_EABI_MASK                0xff000000
+#define compat_elf_check_arch(x)        (((x)->e_machine == EM_ARM) && \
+                                         ((x)->e_flags & EF_ARM_EABI_MASK))
+
+#define compat_start_thread             compat_start_thread
+#define COMPAT_SET_PERSONALITY(ex)      set_thread_flag(TIF_32BIT);
+#define COMPAT_ARCH_DLINFO
+extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
+                                      int uses_interp);
+#define compat_arch_setup_additional_pages \
+                                        aarch32_setup_vectors_page
+
+#endif /* CONFIG_COMPAT */
+
+#endif
diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
new file mode 100644
index 000000000000..f8190ba45a3e
--- /dev/null
+++ b/arch/arm64/include/asm/hwcap.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_HWCAP_H
+#define __ASM_HWCAP_H
+
+/*
+ * HWCAP flags - for elf_hwcap (in kernel) and AT_HWCAP
+ */
+#define HWCAP_FP                (1 << 0)
+#define HWCAP_ASIMD             (1 << 1)
+
+#define COMPAT_HWCAP_HALF       (1 << 1)
+#define COMPAT_HWCAP_THUMB      (1 << 2)
+#define COMPAT_HWCAP_FAST_MULT  (1 << 4)
+#define COMPAT_HWCAP_VFP        (1 << 6)
+#define COMPAT_HWCAP_EDSP       (1 << 7)
+#define COMPAT_HWCAP_NEON       (1 << 12)
+#define COMPAT_HWCAP_VFPv3      (1 << 13)
+#define COMPAT_HWCAP_TLS        (1 << 15)
+#define COMPAT_HWCAP_VFPv4      (1 << 16)
+#define COMPAT_HWCAP_IDIVA      (1 << 17)
+#define COMPAT_HWCAP_IDIVT      (1 << 18)
+#define COMPAT_HWCAP_IDIV       (COMPAT_HWCAP_IDIVA|COMPAT_HWCAP_IDIVT)
+
+#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
+/*
+ * This yields a mask that user programs can use to figure out what
+ * instruction set this cpu supports.
+ */
+#define ELF_HWCAP               (elf_hwcap)
+#define COMPAT_ELF_HWCAP        (COMPAT_HWCAP_HALF|COMPAT_HWCAP_THUMB|\
+                                 COMPAT_HWCAP_FAST_MULT|COMPAT_HWCAP_EDSP|\
+                                 COMPAT_HWCAP_TLS|COMPAT_HWCAP_VFP|\
+                                 COMPAT_HWCAP_VFPv3|COMPAT_HWCAP_VFPv4|\
+                                 COMPAT_HWCAP_NEON|COMPAT_HWCAP_IDIV)
+
+extern unsigned int elf_hwcap;
+#endif
+
+#endif
diff --git a/arch/arm64/include/asm/param.h b/arch/arm64/include/asm/param.h
new file mode 100644
index 000000000000..8e3a281d448a
--- /dev/null
+++ b/arch/arm64/include/asm/param.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_PARAM_H
+#define __ASM_PARAM_H
+
+#define EXEC_PAGESIZE   65536
+
+#include <asm-generic/param.h>
+
+#endif
diff --git a/arch/arm64/include/asm/shmparam.h b/arch/arm64/include/asm/shmparam.h
new file mode 100644
index 000000000000..4df608a8459e
--- /dev/null
+++ b/arch/arm64/include/asm/shmparam.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_SHMPARAM_H
+#define __ASM_SHMPARAM_H
+
+/*
+ * For IPC syscalls from compat tasks, we need to use the legacy 16k
+ * alignment value. Since we don't have aliasing D-caches, the rest of
+ * the time we can safely use PAGE_SIZE.
+ */
+#define COMPAT_SHMLBA   0x4000
+
+#include <asm-generic/shmparam.h>
+
+#endif /* __ASM_SHMPARAM_H */