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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/nios2/include/asm/elf.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */

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/*

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 * Copyright (C) 2011 Tobias Klauser <[email protected]>

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 */

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#ifndef _ASM_NIOS2_ELF_H

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#define _ASM_NIOS2_ELF_H

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#include <uapi/asm/elf.h>

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/*

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 * This is used to ensure we don't load something for the wrong architecture.

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 */

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#define elf_check_arch(x) ((x)->e_machine == EM_ALTERA_NIOS2)

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#define ELF_PLAT_INIT(_r, load_addr)

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#define CORE_DUMP_USE_REGSET

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#define ELF_EXEC_PAGESIZE	4096

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/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical

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   use of this is to invoke "./ld.so someprog" to test out a new version of

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   the loader.  We need to make sure that it is out of the way of the program

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   that it will "exec", and that there is sufficient room for the brk.  */

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#define ELF_ET_DYN_BASE		0xD0000000UL

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/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is

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   now struct_user_regs, they are different) */

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#define ARCH_HAS_SETUP_ADDITIONAL_PAGES	1

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struct linux_binprm;

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extern int arch_setup_additional_pages(struct linux_binprm *bprm,

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	int uses_interp);

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#define ELF_CORE_COPY_REGS(pr_reg, regs)				\

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{ do {									\

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	/* Bleech. */							\

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	pr_reg[0]  = regs->r8;						\

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	pr_reg[1]  = regs->r9;						\

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	pr_reg[2]  = regs->r10;						\

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	pr_reg[3]  = regs->r11;						\

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	pr_reg[4]  = regs->r12;						\

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	pr_reg[5]  = regs->r13;						\

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	pr_reg[6]  = regs->r14;						\

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	pr_reg[7]  = regs->r15;						\

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	pr_reg[8]  = regs->r1;						\

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	pr_reg[9]  = regs->r2;						\

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	pr_reg[10] = regs->r3;						\

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	pr_reg[11] = regs->r4;						\

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	pr_reg[12] = regs->r5;						\

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	pr_reg[13] = regs->r6;						\

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	pr_reg[14] = regs->r7;						\

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	pr_reg[15] = regs->orig_r2;					\

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	pr_reg[16] = regs->ra;						\

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	pr_reg[17] = regs->fp;						\

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	pr_reg[18] = regs->sp;						\

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	pr_reg[19] = regs->gp;						\

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	pr_reg[20] = regs->estatus;					\

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	pr_reg[21] = regs->ea;						\

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	pr_reg[22] = regs->orig_r7;					\

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	{								\

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		struct switch_stack *sw = ((struct switch_stack *)regs) - 1; \

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		pr_reg[23] = sw->r16;					\

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		pr_reg[24] = sw->r17;					\

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		pr_reg[25] = sw->r18;					\

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		pr_reg[26] = sw->r19;					\

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		pr_reg[27] = sw->r20;					\

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		pr_reg[28] = sw->r21;					\

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		pr_reg[29] = sw->r22;					\

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		pr_reg[30] = sw->r23;					\

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		pr_reg[31] = sw->fp;					\

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		pr_reg[32] = sw->gp;					\

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		pr_reg[33] = sw->ra;					\

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	}								\

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} while (0); }

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/* This yields a mask that user programs can use to figure out what

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   instruction set this cpu supports.  */

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#define ELF_HWCAP	(0)

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/* This yields a string that ld.so will use to load implementation

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   specific libraries for optimization.  This is more specific in

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   intent than poking at uname or /proc/cpuinfo.  */

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#define ELF_PLATFORM  (NULL)

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#endif /* _ASM_NIOS2_ELF_H */

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