/* 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, \
}
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 */
