一个2.4.21版本的嵌入式linux内核
源代码在线查看： binfmt_elf32.c
/* * Support for 32-bit Linux/MIPS ELF binaries. * * Copyright (C) 1999, 2001 Ralf Baechle * Copyright (C) 1999, 2001 Silicon Graphics, Inc. * * Heavily inspired by the 32-bit Sparc compat code which is * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com) * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@ultra.linux.cz) */ #define ELF_ARCH EM_MIPS #define ELF_CLASS ELFCLASS32 #ifdef __MIPSEB__ #define ELF_DATA ELFDATA2MSB; #else /* __MIPSEL__ */ #define ELF_DATA ELFDATA2LSB; #endif /* ELF register definitions */ #define ELF_NGREG 45 #define ELF_NFPREG 33 typedef unsigned int 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]; /* * This is used to ensure we don't load something for the wrong architecture. */ #define elf_check_arch(hdr) \ ({ \ int __res = 1; \ struct elfhdr *__h = (hdr); \ \ if (__h->e_machine != EM_MIPS) \ __res = 0; \ if (__h->e_ident[EI_CLASS] != ELFCLASS32) \ __res = 0; \ if ((__h->e_flags & EF_MIPS_ABI2) != 0) \ __res = 0; \ if (((__h->e_flags & EF_MIPS_ABI) != 0) && \ ((__h->e_flags & EF_MIPS_ABI) != EF_MIPS_ABI_O32)) \ __res = 0; \ \ __res; \ }) #define TASK32_SIZE 0x80000000UL #undef ELF_ET_DYN_BASE #define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2) #include #include #include #include struct timeval32 { int tv_sec, tv_usec; }; #define elf_prstatus elf_prstatus32 struct elf_prstatus32 { struct elf_siginfo pr_info; /* Info associated with signal */ short pr_cursig; /* Current signal */ unsigned int pr_sigpend; /* Set of pending signals */ unsigned int pr_sighold; /* Set of held signals */ pid_t pr_pid; pid_t pr_ppid; pid_t pr_pgrp; pid_t pr_sid; struct timeval32 pr_utime; /* User time */ struct timeval32 pr_stime; /* System time */ struct timeval32 pr_cutime; /* Cumulative user time */ struct timeval32 pr_cstime; /* Cumulative system time */ elf_gregset_t pr_reg; /* GP registers */ int pr_fpvalid; /* True if math co-processor being used. */ }; #define elf_prpsinfo elf_prpsinfo32 struct elf_prpsinfo32 { char pr_state; /* numeric process state */ char pr_sname; /* char for pr_state */ char pr_zomb; /* zombie */ char pr_nice; /* nice val */ unsigned int pr_flag; /* flags */ u16 pr_uid; u16 pr_gid; pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; /* Lots missing */ char pr_fname[16]; /* filename of executable */ char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ }; #define elf_addr_t u32 #define elf_caddr_t u32 #define init_elf_binfmt init_elf32_binfmt #undef CONFIG_BINFMT_ELF #ifdef CONFIG_BINFMT_ELF32 #define CONFIG_BINFMT_ELF CONFIG_BINFMT_ELF32 #endif #undef CONFIG_BINFMT_ELF_MODULE #ifdef CONFIG_BINFMT_ELF32_MODULE #define CONFIG_BINFMT_ELF_MODULE CONFIG_BINFMT_ELF32_MODULE #endif MODULE_DESCRIPTION("Binary format loader for compatibility with 32bit Linux/MIPS binaries"); MODULE_AUTHOR("Ralf Baechle (ralf@oss.sgi.com)"); #undef MODULE_DESCRIPTION #undef MODULE_AUTHOR #include "../../../fs/binfmt_elf.c"
