/****************************************************************************//* * linux/fs/binfmt_flat.c * * Copyright (C) 2000-2003 David McCullough <davidm@snapgear.com> * Copyright (C) 2002 Greg Ungerer <gerg@snapgear.com> * Copyright (C) 2002 SnapGear, by Paul Dale <pauli@snapgear.com> * Copyright (C) 2000, 2001 Lineo, by David McCullough <davidm@lineo.com> * based heavily on: * * linux/fs/binfmt_aout.c: * Copyright (C) 1991, 1992, 1996 Linus Torvalds * linux/fs/binfmt_flat.c for 2.0 kernel * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> * JAN/99 -- coded full program relocation (gerg@snapgear.com) */ #include <linux/export.h>#include <linux/kernel.h>#include <linux/sched.h>#include <linux/mm.h>#include <linux/mman.h>#include <linux/errno.h>#include <linux/signal.h>#include <linux/string.h>#include <linux/fs.h>#include <linux/file.h>#include <linux/stat.h>#include <linux/fcntl.h>#include <linux/ptrace.h>#include <linux/user.h>#include <linux/slab.h>#include <linux/binfmts.h>#include <linux/personality.h>#include <linux/init.h>#include <linux/flat.h>#include <linux/syscalls.h> #include <asm/byteorder.h>#include <asm/uaccess.h>#include <asm/unaligned.h>#include <asm/cacheflush.h>#include <asm/page.h> /****************************************************************************/ #if 0#define DEBUG 1#endif #ifdef DEBUG#define DBG_FLT(a...) printk(a)#else#define DBG_FLT(a...)#endif /* * User data (data section and bss) needs to be aligned. * We pick 0x20 here because it is the max value elf2flt has always * used in producing FLAT files, and because it seems to be large * enough to make all the gcc alignment related tests happy. */#define FLAT_DATA_ALIGN (0x20) /* * User data (stack) also needs to be aligned. * Here we can be a bit looser than the data sections since this * needs to only meet arch ABI requirements. */#define FLAT_STACK_ALIGN max_t(unsigned long, sizeof(void *), ARCH_SLAB_MINALIGN) #define RELOC_FAILED 0xff00ff01 /* Relocation incorrect somewhere */#define UNLOADED_LIB 0x7ff000ff /* Placeholder for unused library */ struct lib_info { struct { unsigned long start_code; /* Start of text segment */ unsigned long start_data; /* Start of data segment */ unsigned long start_brk; /* End of data segment */ unsigned long text_len; /* Length of text segment */ unsigned long entry; /* Start address for this module */ unsigned long build_date; /* When this one was compiled */ short loaded; /* Has this library been loaded? */ } lib_list[MAX_SHARED_LIBS];}; #ifdef CONFIG_BINFMT_SHARED_FLATstatic int load_flat_shared_library(int id, struct lib_info *p);#endif static int load_flat_binary(struct linux_binprm *);static int flat_core_dump(struct coredump_params *cprm); static struct linux_binfmt flat_format = { .module = THIS_MODULE, .load_binary = load_flat_binary, .core_dump = flat_core_dump, .min_coredump = PAGE_SIZE}; /****************************************************************************//* * Routine writes a core dump image in the current directory. * Currently only a stub-function. */ static int flat_core_dump(struct coredump_params *cprm){ printk("Process %s:%d received signr %d and should have core dumped\n", current->comm, current->pid, (int) cprm->siginfo->si_signo); return(1);} /****************************************************************************//* * create_flat_tables() parses the env- and arg-strings in new user * memory and creates the pointer tables from them, and puts their * addresses on the "stack", returning the new stack pointer value. */ static unsigned long create_flat_tables( unsigned long pp, struct linux_binprm * bprm){ unsigned long *argv,*envp; unsigned long * sp; char * p = (char*)pp; int argc = bprm->argc; int envc = bprm->envc; char uninitialized_var(dummy); sp = (unsigned long *)p; sp -= (envc + argc + 2) + 1 + (flat_argvp_envp_on_stack() ? 2 : 0); sp = (unsigned long *) ((unsigned long)sp & -FLAT_STACK_ALIGN); argv = sp + 1 + (flat_argvp_envp_on_stack() ? 2 : 0); envp = argv + (argc + 1); if (flat_argvp_envp_on_stack()) { put_user((unsigned long) envp, sp + 2); put_user((unsigned long) argv, sp + 1); } put_user(argc, sp); current->mm->arg_start = (unsigned long) p; while (argc-->0) { put_user((unsigned long) p, argv++); do { get_user(dummy, p); p++; } while (dummy); } put_user((unsigned long) NULL, argv); current->mm->arg_end = current->mm->env_start = (unsigned long) p; while (envc-->0) { put_user((unsigned long)p, envp); envp++; do { get_user(dummy, p); p++; } while (dummy); } put_user((unsigned long) NULL, envp); current->mm->env_end = (unsigned long) p; return (unsigned long)sp;} /****************************************************************************/ #ifdef CONFIG_BINFMT_ZFLAT #include <linux/zlib.h> #define LBUFSIZE 4000 /* gzip flag byte */#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */#define ORIG_NAME 0x08 /* bit 3 set: original file name present */#define COMMENT 0x10 /* bit 4 set: file comment present */#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */#define RESERVED 0xC0 /* bit 6,7: reserved */ static int decompress_exec( struct linux_binprm *bprm, unsigned long offset, char *dst, long len, int fd){ unsigned char *buf; z_stream strm; loff_t fpos; int ret, retval; DBG_FLT("decompress_exec(offset=%x,buf=%x,len=%x)\n",(int)offset, (int)dst, (int)len); memset(&strm, 0, sizeof(strm)); strm.workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL); if (strm.workspace == NULL) { DBG_FLT("binfmt_flat: no memory for decompress workspace\n"); return -ENOMEM; } buf = kmalloc(LBUFSIZE, GFP_KERNEL); if (buf == NULL) { DBG_FLT("binfmt_flat: no memory for read buffer\n"); retval = -ENOMEM; goto out_free; } /* Read in first chunk of data and parse gzip header. */ fpos = offset; ret = kernel_read(bprm->file, offset, buf, LBUFSIZE); strm.next_in = buf; strm.avail_in = ret; strm.total_in = 0; fpos += ret; retval = -ENOEXEC; /* Check minimum size -- gzip header */ if (ret < 10) { DBG_FLT("binfmt_flat: file too small?\n"); goto out_free_buf; } /* Check gzip magic number */ if ((buf[0] != 037) || ((buf[1] != 0213) && (buf[1] != 0236))) { DBG_FLT("binfmt_flat: unknown compression magic?\n"); goto out_free_buf; } /* Check gzip method */ if (buf[2] != 8) { DBG_FLT("binfmt_flat: unknown compression method?\n"); goto out_free_buf; } /* Check gzip flags */ if ((buf[3] & ENCRYPTED) || (buf[3] & CONTINUATION) || (buf[3] & RESERVED)) { DBG_FLT("binfmt_flat: unknown flags?\n"); goto out_free_buf; } ret = 10; if (buf[3] & EXTRA_FIELD) { ret += 2 + buf[10] + (buf[11] << 8); if (unlikely(LBUFSIZE <= ret)) { DBG_FLT("binfmt_flat: buffer overflow (EXTRA)?\n"); goto out_free_buf; } } if (buf[3] & ORIG_NAME) { while (ret < LBUFSIZE && buf[ret++] != 0) ; if (unlikely(LBUFSIZE == ret)) { DBG_FLT("binfmt_flat: buffer overflow (ORIG_NAME)?\n"); goto out_free_buf; } } if (buf[3] & COMMENT) { while (ret < LBUFSIZE && buf[ret++] != 0) ; if (unlikely(LBUFSIZE == ret)) { DBG_FLT("binfmt_flat: buffer overflow (COMMENT)?\n"); goto out_free_buf; } } strm.next_in += ret; strm.avail_in -= ret; strm.next_out = dst; strm.avail_out = len; strm.total_out = 0; if (zlib_inflateInit2(&strm, -MAX_WBITS) != Z_OK) { DBG_FLT("binfmt_flat: zlib init failed?\n"); goto out_free_buf; } while ((ret = zlib_inflate(&strm, Z_NO_FLUSH)) == Z_OK) { ret = kernel_read(bprm->file, fpos, buf, LBUFSIZE); if (ret <= 0) break; len -= ret; strm.next_in = buf; strm.avail_in = ret; strm.total_in = 0; fpos += ret; } if (ret < 0) { DBG_FLT("binfmt_flat: decompression failed (%d), %s\n", ret, strm.msg); goto out_zlib; } retval = 0;out_zlib: zlib_inflateEnd(&strm);out_free_buf: kfree(buf);out_free: kfree(strm.workspace); return retval;} #endif /* CONFIG_BINFMT_ZFLAT */ /****************************************************************************/ static unsigned longcalc_reloc(unsigned long r, struct lib_info *p, int curid, int internalp){ unsigned long addr; int id; unsigned long start_brk; unsigned long start_data; unsigned long text_len; unsigned long start_code; #ifdef CONFIG_BINFMT_SHARED_FLAT if (r == 0) id = curid; /* Relocs of 0 are always self referring */ else { id = (r >> 24) & 0xff; /* Find ID for this reloc */ r &= 0x00ffffff; /* Trim ID off here */ } if (id >= MAX_SHARED_LIBS) { printk("BINFMT_FLAT: reference 0x%x to shared library %d", (unsigned) r, id); goto failed; } if (curid != id) { if (internalp) { printk("BINFMT_FLAT: reloc address 0x%x not in same module " "(%d != %d)", (unsigned) r, curid, id); goto failed; } else if ( ! p->lib_list[id].loaded && IS_ERR_VALUE(load_flat_shared_library(id, p))) { printk("BINFMT_FLAT: failed to load library %d", id); goto failed; } /* Check versioning information (i.e. time stamps) */ if (p->lib_list[id].build_date && p->lib_list[curid].build_date && p->lib_list[curid].build_date < p->lib_list[id].build_date) { printk("BINFMT_FLAT: library %d is younger than %d", id, curid); goto failed; } }#else id = 0;#endif start_brk = p->lib_list[id].start_brk; start_data = p->lib_list[id].start_data; start_code = p->lib_list[id].start_code; text_len = p->lib_list[id].text_len; if (!flat_reloc_valid(r, start_brk - start_data + text_len)) { printk("BINFMT_FLAT: reloc outside program 0x%x (0 - 0x%x/0x%x)", (int) r,(int)(start_brk-start_data+text_len),(int)text_len); goto failed; } if (r < text_len) /* In text segment */ addr = r + start_code; else /* In data segment */ addr = r - text_len + start_data; /* Range checked already above so doing the range tests is redundant...*/ return(addr); failed: printk(", killing %s!\n", current->comm); send_sig(SIGSEGV, current, 0); return RELOC_FAILED;} /****************************************************************************/ void old_reloc(unsigned long rl){#ifdef DEBUG char *segment[] = { "TEXT", "DATA", "BSS", "*UNKNOWN*" };#endif flat_v2_reloc_t r; unsigned long *ptr; r.value = rl;#if defined(CONFIG_COLDFIRE) ptr = (unsigned long *) (current->mm->start_code + r.reloc.offset);#else ptr = (unsigned long *) (current->mm->start_data + r.reloc.offset);#endif #ifdef DEBUG printk("Relocation of variable at DATASEG+%x " "(address %p, currently %x) into segment %s\n", r.reloc.offset, ptr, (int)*ptr, segment[r.reloc.type]);#endif switch (r.reloc.type) { case OLD_FLAT_RELOC_TYPE_TEXT: *ptr += current->mm->start_code; break; case OLD_FLAT_RELOC_TYPE_DATA: *ptr += current->mm->start_data; break; case OLD_FLAT_RELOC_TYPE_BSS: *ptr += current->mm->end_data; break; default: printk("BINFMT_FLAT: Unknown relocation type=%x\n", r.reloc.type); break; } #ifdef DEBUG printk("Relocation became %x\n", (int)*ptr);#endif} /****************************************************************************/ static int load_flat_file(struct linux_binprm * bprm, struct lib_info *libinfo, int id, unsigned long *extra_stack){ struct flat_hdr * hdr; unsigned long textpos = 0, datapos = 0, result; unsigned long realdatastart = 0; unsigned long text_len, data_len, bss_len, stack_len, flags; unsigned long full_data; unsigned long len, memp = 0; unsigned long memp_size, extra, rlim; unsigned long *reloc = 0, *rp; struct inode *inode; int i, rev, relocs = 0; loff_t fpos; unsigned long start_code, end_code; int ret; hdr = ((struct flat_hdr *) bprm->buf); /* exec-header */ inode = file_inode(bprm->file); text_len = ntohl(hdr->data_start); data_len = ntohl(hdr->data_end) - ntohl(hdr->data_start); bss_len = ntohl(hdr->bss_end) - ntohl(hdr->data_end); stack_len = ntohl(hdr->stack_size); if (extra_stack) { stack_len += *extra_stack; *extra_stack = stack_len; } relocs = ntohl(hdr->reloc_count); flags = ntohl(hdr->flags); rev = ntohl(hdr->rev); full_data = data_len + relocs * sizeof(unsigned long); if (strncmp(hdr->magic, "bFLT", 4)) { /* * Previously, here was a printk to tell people * "BINFMT_FLAT: bad header magic". * But for the kernel which also use ELF FD-PIC format, this * error message is confusing. * because a lot of people do not manage to produce good */ ret = -ENOEXEC; goto err; } if (flags & FLAT_FLAG_KTRACE) printk("BINFMT_FLAT: Loading file: %s\n", bprm->filename); if (rev != FLAT_VERSION && rev != OLD_FLAT_VERSION) { printk("BINFMT_FLAT: bad flat file version 0x%x (supported " "0x%lx and 0x%lx)\n", rev, FLAT_VERSION, OLD_FLAT_VERSION); ret = -ENOEXEC; goto err; } /* Don't allow old format executables to use shared libraries */ if (rev == OLD_FLAT_VERSION && id != 0) { printk("BINFMT_FLAT: shared libraries are not available before rev 0x%x\n", (int) FLAT_VERSION); ret = -ENOEXEC; goto err; } /* * fix up the flags for the older format, there were all kinds * of endian hacks, this only works for the simple cases */ if (rev == OLD_FLAT_VERSION && flat_old_ram_flag(flags)) flags = FLAT_FLAG_RAM; #ifndef CONFIG_BINFMT_ZFLAT if (flags & (FLAT_FLAG_GZIP|FLAT_FLAG_GZDATA)) { printk("Support for ZFLAT executables is not enabled.\n"); ret = -ENOEXEC;Lines 1–500 of 953. 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/****************************************************************************/ /* * linux/fs/binfmt_flat.c * * Copyright (C) 2000-2003 David McCullough <davidm@snapgear.com> * Copyright (C) 2002 Greg Ungerer <gerg@snapgear.com> * Copyright (C) 2002 SnapGear, by Paul Dale <pauli@snapgear.com> * Copyright (C) 2000, 2001 Lineo, by David McCullough <davidm@lineo.com> * based heavily on: * * linux/fs/binfmt_aout.c: * Copyright (C) 1991, 1992, 1996 Linus Torvalds * linux/fs/binfmt_flat.c for 2.0 kernel * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> * JAN/99 -- coded full program relocation (gerg@snapgear.com) */ #include <linux/export.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/mm.h> #include <linux/mman.h> #include <linux/errno.h> #include <linux/signal.h> #include <linux/string.h> #include <linux/fs.h> #include <linux/file.h> #include <linux/stat.h> #include <linux/fcntl.h> #include <linux/ptrace.h> #include <linux/user.h> #include <linux/slab.h> #include <linux/binfmts.h> #include <linux/personality.h> #include <linux/init.h> #include <linux/flat.h> #include <linux/syscalls.h> #include <asm/byteorder.h> #include <asm/uaccess.h> #include <asm/unaligned.h> #include <asm/cacheflush.h> #include <asm/page.h> /****************************************************************************/ #if 0 #define DEBUG 1 #endif #ifdef DEBUG #define DBG_FLT(a...) printk(a) #else #define DBG_FLT(a...) #endif /* * User data (data section and bss) needs to be aligned. * We pick 0x20 here because it is the max value elf2flt has always * used in producing FLAT files, and because it seems to be large * enough to make all the gcc alignment related tests happy. */ #define FLAT_DATA_ALIGN (0x20) /* * User data (stack) also needs to be aligned. * Here we can be a bit looser than the data sections since this * needs to only meet arch ABI requirements. */ #define FLAT_STACK_ALIGN max_t(unsigned long, sizeof(void *), ARCH_SLAB_MINALIGN) #define RELOC_FAILED 0xff00ff01 /* Relocation incorrect somewhere */ #define UNLOADED_LIB 0x7ff000ff /* Placeholder for unused library */ struct lib_info { struct { unsigned long start_code; /* Start of text segment */ unsigned long start_data; /* Start of data segment */ unsigned long start_brk; /* End of data segment */ unsigned long text_len; /* Length of text segment */ unsigned long entry; /* Start address for this module */ unsigned long build_date; /* When this one was compiled */ short loaded; /* Has this library been loaded? */ } lib_list[MAX_SHARED_LIBS]; }; #ifdef CONFIG_BINFMT_SHARED_FLAT static int load_flat_shared_library(int id, struct lib_info *p); #endif static int load_flat_binary(struct linux_binprm *); static int flat_core_dump(struct coredump_params *cprm); static struct linux_binfmt flat_format = { .module = THIS_MODULE, .load_binary = load_flat_binary, .core_dump = flat_core_dump, .min_coredump = PAGE_SIZE }; /****************************************************************************/ /* * Routine writes a core dump image in the current directory. * Currently only a stub-function. */ static int flat_core_dump(struct coredump_params *cprm) { printk("Process %s:%d received signr %d and should have core dumped\n", current->comm, current->pid, (int) cprm->siginfo->si_signo); return(1); } /****************************************************************************/ /* * create_flat_tables() parses the env- and arg-strings in new user * memory and creates the pointer tables from them, and puts their * addresses on the "stack", returning the new stack pointer value. */ static unsigned long create_flat_tables( unsigned long pp, struct linux_binprm * bprm) { unsigned long *argv,*envp; unsigned long * sp; char * p = (char*)pp; int argc = bprm->argc; int envc = bprm->envc; char uninitialized_var(dummy); sp = (unsigned long *)p; sp -= (envc + argc + 2) + 1 + (flat_argvp_envp_on_stack() ? 2 : 0); sp = (unsigned long *) ((unsigned long)sp & -FLAT_STACK_ALIGN); argv = sp + 1 + (flat_argvp_envp_on_stack() ? 2 : 0); envp = argv + (argc + 1); if (flat_argvp_envp_on_stack()) { put_user((unsigned long) envp, sp + 2); put_user((unsigned long) argv, sp + 1); } put_user(argc, sp); current->mm->arg_start = (unsigned long) p; while (argc-->0) { put_user((unsigned long) p, argv++); do { get_user(dummy, p); p++; } while (dummy); } put_user((unsigned long) NULL, argv); current->mm->arg_end = current->mm->env_start = (unsigned long) p; while (envc-->0) { put_user((unsigned long)p, envp); envp++; do { get_user(dummy, p); p++; } while (dummy); } put_user((unsigned long) NULL, envp); current->mm->env_end = (unsigned long) p; return (unsigned long)sp; } /****************************************************************************/ #ifdef CONFIG_BINFMT_ZFLAT #include <linux/zlib.h> #define LBUFSIZE 4000 /* gzip flag byte */ #define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */ #define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */ #define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */ #define ORIG_NAME 0x08 /* bit 3 set: original file name present */ #define COMMENT 0x10 /* bit 4 set: file comment present */ #define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */ #define RESERVED 0xC0 /* bit 6,7: reserved */ static int decompress_exec( struct linux_binprm *bprm, unsigned long offset, char *dst, long len, int fd) { unsigned char *buf; z_stream strm; loff_t fpos; int ret, retval; DBG_FLT("decompress_exec(offset=%x,buf=%x,len=%x)\n",(int)offset, (int)dst, (int)len); memset(&strm, 0, sizeof(strm)); strm.workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL); if (strm.workspace == NULL) { DBG_FLT("binfmt_flat: no memory for decompress workspace\n"); return -ENOMEM; } buf = kmalloc(LBUFSIZE, GFP_KERNEL); if (buf == NULL) { DBG_FLT("binfmt_flat: no memory for read buffer\n"); retval = -ENOMEM; goto out_free; } /* Read in first chunk of data and parse gzip header. */ fpos = offset; ret = kernel_read(bprm->file, offset, buf, LBUFSIZE); strm.next_in = buf; strm.avail_in = ret; strm.total_in = 0; fpos += ret; retval = -ENOEXEC; /* Check minimum size -- gzip header */ if (ret < 10) { DBG_FLT("binfmt_flat: file too small?\n"); goto out_free_buf; } /* Check gzip magic number */ if ((buf[0] != 037) || ((buf[1] != 0213) && (buf[1] != 0236))) { DBG_FLT("binfmt_flat: unknown compression magic?\n"); goto out_free_buf; } /* Check gzip method */ if (buf[2] != 8) { DBG_FLT("binfmt_flat: unknown compression method?\n"); goto out_free_buf; } /* Check gzip flags */ if ((buf[3] & ENCRYPTED) || (buf[3] & CONTINUATION) || (buf[3] & RESERVED)) { DBG_FLT("binfmt_flat: unknown flags?\n"); goto out_free_buf; } ret = 10; if (buf[3] & EXTRA_FIELD) { ret += 2 + buf[10] + (buf[11] << 8); if (unlikely(LBUFSIZE <= ret)) { DBG_FLT("binfmt_flat: buffer overflow (EXTRA)?\n"); goto out_free_buf; } } if (buf[3] & ORIG_NAME) { while (ret < LBUFSIZE && buf[ret++] != 0) ; if (unlikely(LBUFSIZE == ret)) { DBG_FLT("binfmt_flat: buffer overflow (ORIG_NAME)?\n"); goto out_free_buf; } } if (buf[3] & COMMENT) { while (ret < LBUFSIZE && buf[ret++] != 0) ; if (unlikely(LBUFSIZE == ret)) { DBG_FLT("binfmt_flat: buffer overflow (COMMENT)?\n"); goto out_free_buf; } } strm.next_in += ret; strm.avail_in -= ret; strm.next_out = dst; strm.avail_out = len; strm.total_out = 0; if (zlib_inflateInit2(&strm, -MAX_WBITS) != Z_OK) { DBG_FLT("binfmt_flat: zlib init failed?\n"); goto out_free_buf; } while ((ret = zlib_inflate(&strm, Z_NO_FLUSH)) == Z_OK) { ret = kernel_read(bprm->file, fpos, buf, LBUFSIZE); if (ret <= 0) break; len -= ret; strm.next_in = buf; strm.avail_in = ret; strm.total_in = 0; fpos += ret; } if (ret < 0) { DBG_FLT("binfmt_flat: decompression failed (%d), %s\n", ret, strm.msg); goto out_zlib; } retval = 0; out_zlib: zlib_inflateEnd(&strm); out_free_buf: kfree(buf); out_free: kfree(strm.workspace); return retval; } #endif /* CONFIG_BINFMT_ZFLAT */ /****************************************************************************/ static unsigned long calc_reloc(unsigned long r, struct lib_info *p, int curid, int internalp) { unsigned long addr; int id; unsigned long start_brk; unsigned long start_data; unsigned long text_len; unsigned long start_code; #ifdef CONFIG_BINFMT_SHARED_FLAT if (r == 0) id = curid; /* Relocs of 0 are always self referring */ else { id = (r >> 24) & 0xff; /* Find ID for this reloc */ r &= 0x00ffffff; /* Trim ID off here */ } if (id >= MAX_SHARED_LIBS) { printk("BINFMT_FLAT: reference 0x%x to shared library %d", (unsigned) r, id); goto failed; } if (curid != id) { if (internalp) { printk("BINFMT_FLAT: reloc address 0x%x not in same module " "(%d != %d)", (unsigned) r, curid, id); goto failed; } else if ( ! p->lib_list[id].loaded && IS_ERR_VALUE(load_flat_shared_library(id, p))) { printk("BINFMT_FLAT: failed to load library %d", id); goto failed; } /* Check versioning information (i.e. time stamps) */ if (p->lib_list[id].build_date && p->lib_list[curid].build_date && p->lib_list[curid].build_date < p->lib_list[id].build_date) { printk("BINFMT_FLAT: library %d is younger than %d", id, curid); goto failed; } } #else id = 0; #endif start_brk = p->lib_list[id].start_brk; start_data = p->lib_list[id].start_data; start_code = p->lib_list[id].start_code; text_len = p->lib_list[id].text_len; if (!flat_reloc_valid(r, start_brk - start_data + text_len)) { printk("BINFMT_FLAT: reloc outside program 0x%x (0 - 0x%x/0x%x)", (int) r,(int)(start_brk-start_data+text_len),(int)text_len); goto failed; } if (r < text_len) /* In text segment */ addr = r + start_code; else /* In data segment */ addr = r - text_len + start_data; /* Range checked already above so doing the range tests is redundant...*/ return(addr); failed: printk(", killing %s!\n", current->comm); send_sig(SIGSEGV, current, 0); return RELOC_FAILED; } /****************************************************************************/ void old_reloc(unsigned long rl) { #ifdef DEBUG char *segment[] = { "TEXT", "DATA", "BSS", "*UNKNOWN*" }; #endif flat_v2_reloc_t r; unsigned long *ptr; r.value = rl; #if defined(CONFIG_COLDFIRE) ptr = (unsigned long *) (current->mm->start_code + r.reloc.offset); #else ptr = (unsigned long *) (current->mm->start_data + r.reloc.offset); #endif #ifdef DEBUG printk("Relocation of variable at DATASEG+%x " "(address %p, currently %x) into segment %s\n", r.reloc.offset, ptr, (int)*ptr, segment[r.reloc.type]); #endif switch (r.reloc.type) { case OLD_FLAT_RELOC_TYPE_TEXT: *ptr += current->mm->start_code; break; case OLD_FLAT_RELOC_TYPE_DATA: *ptr += current->mm->start_data; break; case OLD_FLAT_RELOC_TYPE_BSS: *ptr += current->mm->end_data; break; default: printk("BINFMT_FLAT: Unknown relocation type=%x\n", r.reloc.type); break; } #ifdef DEBUG printk("Relocation became %x\n", (int)*ptr); #endif } /****************************************************************************/ static int load_flat_file(struct linux_binprm * bprm, struct lib_info *libinfo, int id, unsigned long *extra_stack) { struct flat_hdr * hdr; unsigned long textpos = 0, datapos = 0, result; unsigned long realdatastart = 0; unsigned long text_len, data_len, bss_len, stack_len, flags; unsigned long full_data; unsigned long len, memp = 0; unsigned long memp_size, extra, rlim; unsigned long *reloc = 0, *rp; struct inode *inode; int i, rev, relocs = 0; loff_t fpos; unsigned long start_code, end_code; int ret; hdr = ((struct flat_hdr *) bprm->buf); /* exec-header */ inode = file_inode(bprm->file); text_len = ntohl(hdr->data_start); data_len = ntohl(hdr->data_end) - ntohl(hdr->data_start); bss_len = ntohl(hdr->bss_end) - ntohl(hdr->data_end); stack_len = ntohl(hdr->stack_size); if (extra_stack) { stack_len += *extra_stack; *extra_stack = stack_len; } relocs = ntohl(hdr->reloc_count); flags = ntohl(hdr->flags); rev = ntohl(hdr->rev); full_data = data_len + relocs * sizeof(unsigned long); if (strncmp(hdr->magic, "bFLT", 4)) { /* * Previously, here was a printk to tell people * "BINFMT_FLAT: bad header magic". * But for the kernel which also use ELF FD-PIC format, this * error message is confusing. * because a lot of people do not manage to produce good */ ret = -ENOEXEC; goto err; } if (flags & FLAT_FLAG_KTRACE) printk("BINFMT_FLAT: Loading file: %s\n", bprm->filename); if (rev != FLAT_VERSION && rev != OLD_FLAT_VERSION) { printk("BINFMT_FLAT: bad flat file version 0x%x (supported " "0x%lx and 0x%lx)\n", rev, FLAT_VERSION, OLD_FLAT_VERSION); ret = -ENOEXEC; goto err; } /* Don't allow old format executables to use shared libraries */ if (rev == OLD_FLAT_VERSION && id != 0) { printk("BINFMT_FLAT: shared libraries are not available before rev 0x%x\n", (int) FLAT_VERSION); ret = -ENOEXEC; goto err; } /* * fix up the flags for the older format, there were all kinds * of endian hacks, this only works for the simple cases */ if (rev == OLD_FLAT_VERSION && flat_old_ram_flag(flags)) flags = FLAT_FLAG_RAM; #ifndef CONFIG_BINFMT_ZFLAT if (flags & (FLAT_FLAG_GZIP|FLAT_FLAG_GZDATA)) { printk("Support for ZFLAT executables is not enabled.\n"); ret = -ENOEXEC;