/arch/mips/kernel/binfmt_elfn32.c

http://github.com/mirrors/linux · C · 106 lines · 70 code · 15 blank · 21 comment · 0 complexity · e63c259f837c6a8611c5e2378a32e52a MD5 · raw file 

    

  1. // SPDX-License-Identifier: GPL-2.0
    2. 

  2. /*
    3. 

  3.  * Support for n32 Linux/MIPS ELF binaries.
    4. 

  4.  * Author: Ralf Baechle (ralf@linux-mips.org)
    5. 

  5.  *
    6. 

  6.  * Copyright (C) 1999, 2001 Ralf Baechle
    7. 

  7.  * Copyright (C) 1999, 2001 Silicon Graphics, Inc.
    8. 

  8.  *
    9. 

  9.  * Heavily inspired by the 32-bit Sparc compat code which is
    10. 

  10.  * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
    11. 

  11.  * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek	(jj@ultra.linux.cz)
    12. 

  12.  */
    13. 

  13. 

  14. #define ELF_ARCH		EM_MIPS
    15. 

  15. #define ELF_CLASS		ELFCLASS32
    16. 

  16. #ifdef __MIPSEB__
    17. 

  17. #define ELF_DATA		ELFDATA2MSB;
    18. 

  18. #else /* __MIPSEL__ */
    19. 

  19. #define ELF_DATA		ELFDATA2LSB;
    20. 

  20. #endif
    21. 

  21. 

  22. /* ELF register definitions */
    23. 

  23. #define ELF_NGREG	45
    24. 

  24. #define ELF_NFPREG	33
    25. 

  25. 

  26. typedef unsigned long elf_greg_t;
    27. 

  27. typedef elf_greg_t elf_gregset_t[ELF_NGREG];
    28. 

  28. 

  29. typedef double elf_fpreg_t;
    30. 

  30. typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
    31. 

  31. 

  32. /*
    33. 

  33.  * This is used to ensure we don't load something for the wrong architecture.
    34. 

  34.  */
    35. 

  35. #define elf_check_arch elfn32_check_arch
    36. 

  36. 

  37. #define TASK32_SIZE		0x7fff8000UL
    38. 

  38. #undef ELF_ET_DYN_BASE
    39. 

  39. #define ELF_ET_DYN_BASE		(TASK32_SIZE / 3 * 2)
    40. 

  40. 

  41. #include <asm/processor.h>
    42. 

  42. #include <linux/elfcore.h>
    43. 

  43. #include <linux/compat.h>
    44. 

  44. #include <linux/math64.h>
    45. 

  45. 

  46. #define elf_prstatus elf_prstatus32
    47. 

  47. struct elf_prstatus32
    48. 

  48. {
    49. 

  49. 	struct elf_siginfo pr_info;	/* Info associated with signal */
    50. 

  50. 	short	pr_cursig;		/* Current signal */
    51. 

  51. 	unsigned int pr_sigpend;	/* Set of pending signals */
    52. 

  52. 	unsigned int pr_sighold;	/* Set of held signals */
    53. 

  53. 	pid_t	pr_pid;
    54. 

  54. 	pid_t	pr_ppid;
    55. 

  55. 	pid_t	pr_pgrp;
    56. 

  56. 	pid_t	pr_sid;
    57. 

  57. 	struct old_timeval32 pr_utime; /* User time */
    58. 

  58. 	struct old_timeval32 pr_stime; /* System time */
    59. 

  59. 	struct old_timeval32 pr_cutime;/* Cumulative user time */
    60. 

  60. 	struct old_timeval32 pr_cstime;/* Cumulative system time */
    61. 

  61. 	elf_gregset_t pr_reg;	/* GP registers */
    62. 

  62. 	int pr_fpvalid;		/* True if math co-processor being used.  */
    63. 

  63. };
    64. 

  64. 

  65. #define elf_prpsinfo elf_prpsinfo32
    66. 

  66. struct elf_prpsinfo32
    67. 

  67. {
    68. 

  68. 	char	pr_state;	/* numeric process state */
    69. 

  69. 	char	pr_sname;	/* char for pr_state */
    70. 

  70. 	char	pr_zomb;	/* zombie */
    71. 

  71. 	char	pr_nice;	/* nice val */
    72. 

  72. 	unsigned int pr_flag;	/* flags */
    73. 

  73. 	__kernel_uid_t	pr_uid;
    74. 

  74. 	__kernel_gid_t	pr_gid;
    75. 

  75. 	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;
    76. 

  76. 	/* Lots missing */
    77. 

  77. 	char	pr_fname[16];	/* filename of executable */
    78. 

  78. 	char	pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
    79. 

  79. };
    80. 

  80. 

  81. #define elf_caddr_t	u32
    82. 

  82. #define init_elf_binfmt init_elfn32_binfmt
    83. 

  83. 

  84. #define jiffies_to_timeval jiffies_to_old_timeval32
    85. 

  85. static __inline__ void
    86. 

  86. jiffies_to_old_timeval32(unsigned long jiffies, struct old_timeval32 *value)
    87. 

  87. {
    88. 

  88. 	/*
    89. 

  89. 	 * Convert jiffies to nanoseconds and separate with
    90. 

  90. 	 * one divide.
    91. 

  91. 	 */
    92. 

  92. 	u64 nsec = (u64)jiffies * TICK_NSEC;
    93. 

  93. 	u32 rem;
    94. 

  94. 	value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
    95. 

  95. 	value->tv_usec = rem / NSEC_PER_USEC;
    96. 

  96. }
    97. 

  97. 

  98. #define ELF_CORE_EFLAGS EF_MIPS_ABI2
    99. 

  99. 

  100. #undef TASK_SIZE
    101. 

  101. #define TASK_SIZE TASK_SIZE32
    102. 

  102. 

  103. #undef ns_to_kernel_old_timeval
    104. 

  104. #define ns_to_kernel_old_timeval ns_to_old_timeval32
    105. 

  105. 

  106. #include "../../../fs/binfmt_elf.c"
    107.