diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/ctf/ctf_mod.c')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/ctf/ctf_mod.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/ctf/ctf_mod.c b/sys/cddl/contrib/opensolaris/uts/common/ctf/ctf_mod.c new file mode 100644 index 000000000000..b34cf400cd2c --- /dev/null +++ b/sys/cddl/contrib/opensolaris/uts/common/ctf/ctf_mod.c @@ -0,0 +1,177 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2003 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <sys/sysmacros.h> +#include <sys/modctl.h> +#include <sys/debug.h> +#include <sys/mman.h> +#include <sys/modctl.h> +#include <sys/kobj.h> +#include <ctf_impl.h> + +int ctf_leave_compressed = 0; + +static struct modlmisc modlmisc = { + &mod_miscops, "Compact C Type Format routines" +}; + +static struct modlinkage modlinkage = { + MODREV_1, &modlmisc, NULL +}; + +int +_init(void) +{ + return (mod_install(&modlinkage)); +} + +int +_info(struct modinfo *mip) +{ + return (mod_info(&modlinkage, mip)); +} + +int +_fini(void) +{ + return (mod_remove(&modlinkage)); +} + +/*ARGSUSED*/ +void * +ctf_zopen(int *errp) +{ + return ((void *)1); /* zmod is always loaded because we depend on it */ +} + +/*ARGSUSED*/ +const void * +ctf_sect_mmap(ctf_sect_t *sp, int fd) +{ + return (MAP_FAILED); /* we don't support this in the kernel */ +} + +/*ARGSUSED*/ +void +ctf_sect_munmap(const ctf_sect_t *sp) +{ + /* we don't support this in the kernel */ +} + +/*ARGSUSED*/ +ctf_file_t * +ctf_fdopen(int fd, int *errp) +{ + return (ctf_set_open_errno(errp, ENOTSUP)); +} + +/*ARGSUSED*/ +ctf_file_t * +ctf_open(const char *filename, int *errp) +{ + return (ctf_set_open_errno(errp, ENOTSUP)); +} + +/*ARGSUSED*/ +int +ctf_write(ctf_file_t *fp, int fd) +{ + return (ctf_set_errno(fp, ENOTSUP)); +} + +int +ctf_version(int version) +{ + ASSERT(version > 0 && version <= CTF_VERSION); + + if (version > 0) + _libctf_version = MIN(CTF_VERSION, version); + + return (_libctf_version); +} + +/*ARGSUSED*/ +ctf_file_t * +ctf_modopen(struct module *mp, int *error) +{ + ctf_sect_t ctfsect, symsect, strsect; + ctf_file_t *fp = NULL; + int err; + + if (error == NULL) + error = &err; + + ctfsect.cts_name = ".SUNW_ctf"; + ctfsect.cts_type = SHT_PROGBITS; + ctfsect.cts_flags = SHF_ALLOC; + ctfsect.cts_data = mp->ctfdata; + ctfsect.cts_size = mp->ctfsize; + ctfsect.cts_entsize = 1; + ctfsect.cts_offset = 0; + + symsect.cts_name = ".symtab"; + symsect.cts_type = SHT_SYMTAB; + symsect.cts_flags = 0; + symsect.cts_data = mp->symtbl; + symsect.cts_size = mp->symhdr->sh_size; +#ifdef _LP64 + symsect.cts_entsize = sizeof (Elf64_Sym); +#else + symsect.cts_entsize = sizeof (Elf32_Sym); +#endif + symsect.cts_offset = 0; + + strsect.cts_name = ".strtab"; + strsect.cts_type = SHT_STRTAB; + strsect.cts_flags = 0; + strsect.cts_data = mp->strings; + strsect.cts_size = mp->strhdr->sh_size; + strsect.cts_entsize = 1; + strsect.cts_offset = 0; + + ASSERT(MUTEX_HELD(&mod_lock)); + + if ((fp = ctf_bufopen(&ctfsect, &symsect, &strsect, error)) == NULL) + return (NULL); + + if (!ctf_leave_compressed && (caddr_t)fp->ctf_base != mp->ctfdata) { + /* + * We must have just uncompressed the CTF data. To avoid + * others having to pay the (substantial) cost of decompressing + * the data, we're going to substitute the uncompressed version + * for the compressed version. Note that this implies that the + * first CTF consumer will induce memory impact on the system + * (but in the name of performance of future CTF consumers). + */ + kobj_set_ctf(mp, (caddr_t)fp->ctf_base, fp->ctf_size); + fp->ctf_data.cts_data = fp->ctf_base; + fp->ctf_data.cts_size = fp->ctf_size; + } + + return (fp); +} |