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-rw-r--r--arch/loongarch/include/asm/elf.h301
1 files changed, 301 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/elf.h b/arch/loongarch/include/asm/elf.h
new file mode 100644
index 000000000000..f3960b18a90e
--- /dev/null
+++ b/arch/loongarch/include/asm/elf.h
@@ -0,0 +1,301 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#ifndef _ASM_ELF_H
+#define _ASM_ELF_H
+
+#include <linux/auxvec.h>
+#include <linux/fs.h>
+#include <uapi/linux/elf.h>
+
+#include <asm/current.h>
+#include <asm/vdso.h>
+
+/* The ABI of a file. */
+#define EF_LOONGARCH_ABI_LP64_SOFT_FLOAT 0x1
+#define EF_LOONGARCH_ABI_LP64_SINGLE_FLOAT 0x2
+#define EF_LOONGARCH_ABI_LP64_DOUBLE_FLOAT 0x3
+
+#define EF_LOONGARCH_ABI_ILP32_SOFT_FLOAT 0x5
+#define EF_LOONGARCH_ABI_ILP32_SINGLE_FLOAT 0x6
+#define EF_LOONGARCH_ABI_ILP32_DOUBLE_FLOAT 0x7
+
+/* LoongArch relocation types used by the dynamic linker */
+#define R_LARCH_NONE 0
+#define R_LARCH_32 1
+#define R_LARCH_64 2
+#define R_LARCH_RELATIVE 3
+#define R_LARCH_COPY 4
+#define R_LARCH_JUMP_SLOT 5
+#define R_LARCH_TLS_DTPMOD32 6
+#define R_LARCH_TLS_DTPMOD64 7
+#define R_LARCH_TLS_DTPREL32 8
+#define R_LARCH_TLS_DTPREL64 9
+#define R_LARCH_TLS_TPREL32 10
+#define R_LARCH_TLS_TPREL64 11
+#define R_LARCH_IRELATIVE 12
+#define R_LARCH_MARK_LA 20
+#define R_LARCH_MARK_PCREL 21
+#define R_LARCH_SOP_PUSH_PCREL 22
+#define R_LARCH_SOP_PUSH_ABSOLUTE 23
+#define R_LARCH_SOP_PUSH_DUP 24
+#define R_LARCH_SOP_PUSH_GPREL 25
+#define R_LARCH_SOP_PUSH_TLS_TPREL 26
+#define R_LARCH_SOP_PUSH_TLS_GOT 27
+#define R_LARCH_SOP_PUSH_TLS_GD 28
+#define R_LARCH_SOP_PUSH_PLT_PCREL 29
+#define R_LARCH_SOP_ASSERT 30
+#define R_LARCH_SOP_NOT 31
+#define R_LARCH_SOP_SUB 32
+#define R_LARCH_SOP_SL 33
+#define R_LARCH_SOP_SR 34
+#define R_LARCH_SOP_ADD 35
+#define R_LARCH_SOP_AND 36
+#define R_LARCH_SOP_IF_ELSE 37
+#define R_LARCH_SOP_POP_32_S_10_5 38
+#define R_LARCH_SOP_POP_32_U_10_12 39
+#define R_LARCH_SOP_POP_32_S_10_12 40
+#define R_LARCH_SOP_POP_32_S_10_16 41
+#define R_LARCH_SOP_POP_32_S_10_16_S2 42
+#define R_LARCH_SOP_POP_32_S_5_20 43
+#define R_LARCH_SOP_POP_32_S_0_5_10_16_S2 44
+#define R_LARCH_SOP_POP_32_S_0_10_10_16_S2 45
+#define R_LARCH_SOP_POP_32_U 46
+#define R_LARCH_ADD8 47
+#define R_LARCH_ADD16 48
+#define R_LARCH_ADD24 49
+#define R_LARCH_ADD32 50
+#define R_LARCH_ADD64 51
+#define R_LARCH_SUB8 52
+#define R_LARCH_SUB16 53
+#define R_LARCH_SUB24 54
+#define R_LARCH_SUB32 55
+#define R_LARCH_SUB64 56
+#define R_LARCH_GNU_VTINHERIT 57
+#define R_LARCH_GNU_VTENTRY 58
+
+#ifndef ELF_ARCH
+
+/* ELF register definitions */
+
+/*
+ * General purpose have the following registers:
+ * Register Number
+ * GPRs 32
+ * ORIG_A0 1
+ * ERA 1
+ * BADVADDR 1
+ * CRMD 1
+ * PRMD 1
+ * EUEN 1
+ * ECFG 1
+ * ESTAT 1
+ * Reserved 5
+ */
+#define ELF_NGREG 45
+
+/*
+ * Floating point have the following registers:
+ * Register Number
+ * FPR 32
+ * FCC 1
+ * FCSR 1
+ */
+#define ELF_NFPREG 34
+
+typedef unsigned long elf_greg_t;
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+typedef double elf_fpreg_t;
+typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
+
+void loongarch_dump_regs64(u64 *uregs, const struct pt_regs *regs);
+
+#ifdef CONFIG_32BIT
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch elf32_check_arch
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_CLASS ELFCLASS32
+
+#define ELF_CORE_COPY_REGS(dest, regs) \
+ loongarch_dump_regs32((u32 *)&(dest), (regs));
+
+#endif /* CONFIG_32BIT */
+
+#ifdef CONFIG_64BIT
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch elf64_check_arch
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_CLASS ELFCLASS64
+
+#define ELF_CORE_COPY_REGS(dest, regs) \
+ loongarch_dump_regs64((u64 *)&(dest), (regs));
+
+#endif /* CONFIG_64BIT */
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_DATA ELFDATA2LSB
+#define ELF_ARCH EM_LOONGARCH
+
+#endif /* !defined(ELF_ARCH) */
+
+#define loongarch_elf_check_machine(x) ((x)->e_machine == EM_LOONGARCH)
+
+#define vmcore_elf32_check_arch loongarch_elf_check_machine
+#define vmcore_elf64_check_arch loongarch_elf_check_machine
+
+/*
+ * Return non-zero if HDR identifies an 32bit ELF binary.
+ */
+#define elf32_check_arch(hdr) \
+({ \
+ int __res = 1; \
+ struct elfhdr *__h = (hdr); \
+ \
+ if (!loongarch_elf_check_machine(__h)) \
+ __res = 0; \
+ if (__h->e_ident[EI_CLASS] != ELFCLASS32) \
+ __res = 0; \
+ \
+ __res; \
+})
+
+/*
+ * Return non-zero if HDR identifies an 64bit ELF binary.
+ */
+#define elf64_check_arch(hdr) \
+({ \
+ int __res = 1; \
+ struct elfhdr *__h = (hdr); \
+ \
+ if (!loongarch_elf_check_machine(__h)) \
+ __res = 0; \
+ if (__h->e_ident[EI_CLASS] != ELFCLASS64) \
+ __res = 0; \
+ \
+ __res; \
+})
+
+#ifdef CONFIG_32BIT
+
+#define SET_PERSONALITY2(ex, state) \
+do { \
+ current->thread.vdso = &vdso_info; \
+ \
+ loongarch_set_personality_fcsr(state); \
+ \
+ if (personality(current->personality) != PER_LINUX) \
+ set_personality(PER_LINUX); \
+} while (0)
+
+#endif /* CONFIG_32BIT */
+
+#ifdef CONFIG_64BIT
+
+#define SET_PERSONALITY2(ex, state) \
+do { \
+ unsigned int p; \
+ \
+ clear_thread_flag(TIF_32BIT_REGS); \
+ clear_thread_flag(TIF_32BIT_ADDR); \
+ \
+ current->thread.vdso = &vdso_info; \
+ loongarch_set_personality_fcsr(state); \
+ \
+ p = personality(current->personality); \
+ if (p != PER_LINUX32 && p != PER_LINUX) \
+ set_personality(PER_LINUX); \
+} while (0)
+
+#endif /* CONFIG_64BIT */
+
+#define CORE_DUMP_USE_REGSET
+#define ELF_EXEC_PAGESIZE PAGE_SIZE
+
+/*
+ * This yields a mask that user programs can use to figure out what
+ * instruction set this cpu supports. This could be done in userspace,
+ * but it's not easy, and we've already done it here.
+ */
+
+#define ELF_HWCAP (elf_hwcap)
+extern unsigned int elf_hwcap;
+#include <asm/hwcap.h>
+
+/*
+ * This yields a string that ld.so will use to load implementation
+ * specific libraries for optimization. This is more specific in
+ * intent than poking at uname or /proc/cpuinfo.
+ */
+
+#define ELF_PLATFORM __elf_platform
+extern const char *__elf_platform;
+
+#define ELF_PLAT_INIT(_r, load_addr) do { \
+ _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \
+ _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \
+ _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \
+ _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \
+ _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \
+ _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \
+ _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \
+ _r->regs[29] = _r->regs[30] = _r->regs[31] = 0; \
+} while (0)
+
+/*
+ * 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.
+ */
+
+#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
+
+/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
+#define ARCH_DLINFO \
+do { \
+ NEW_AUX_ENT(AT_SYSINFO_EHDR, \
+ (unsigned long)current->mm->context.vdso); \
+} while (0)
+
+#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
+struct linux_binprm;
+extern int arch_setup_additional_pages(struct linux_binprm *bprm,
+ int uses_interp);
+
+struct arch_elf_state {
+ int fp_abi;
+ int interp_fp_abi;
+};
+
+#define LOONGARCH_ABI_FP_ANY (0)
+
+#define INIT_ARCH_ELF_STATE { \
+ .fp_abi = LOONGARCH_ABI_FP_ANY, \
+ .interp_fp_abi = LOONGARCH_ABI_FP_ANY, \
+}
+
+#define elf_read_implies_exec(ex, exec_stk) (exec_stk == EXSTACK_DEFAULT)
+
+extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf,
+ bool is_interp, struct arch_elf_state *state);
+
+extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr,
+ struct arch_elf_state *state);
+
+extern void loongarch_set_personality_fcsr(struct arch_elf_state *state);
+
+#endif /* _ASM_ELF_H */
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