From: Ben Gras Date: Sat, 16 Mar 2013 03:19:47 +0000 (+0000) Subject: ld.elf_so, grep, make: use mmap() X-Git-Tag: v3.3.0~941 X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=refs%2Fchanges%2F66%2F566%2F14;p=minix.git ld.elf_so, grep, make: use mmap() . let the dynamic linker use a real file mmap(), reverting most of the minix-specific changes . except for a fallback mode for systems or filesystems that do not support mmap() on files . make, grep: let them use mmap() too, with fallback Change-Id: I11c0c9ad439d713917a6f5c2d196558f6c03eabd --- diff --git a/commands/grep/file.c b/commands/grep/file.c index 9a6ae8ebc..3982f075c 100644 --- a/commands/grep/file.c +++ b/commands/grep/file.c @@ -42,9 +42,7 @@ static size_t lnbuflen; #endif #define FILE_STDIO 0 -#ifndef __minix #define FILE_MMAP 1 -#endif #define FILE_GZIP 2 struct file { diff --git a/commands/grep/mmfile.c b/commands/grep/mmfile.c index 8cdfefe21..14438b42e 100644 --- a/commands/grep/mmfile.c +++ b/commands/grep/mmfile.c @@ -1,4 +1,3 @@ -#ifndef __minix /* $OpenBSD: mmfile.c,v 1.11 2006/09/19 05:52:23 otto Exp $ */ /*- @@ -40,6 +39,9 @@ #define MAX_MAP_LEN 1048576 +#define munmap minix_munmap +#define mmap minix_mmap + mmf_t * mmopen(char *fn, char *mode) { @@ -87,7 +89,7 @@ mmclose(mmf_t *mmf) char * mmfgetln(mmf_t *mmf, size_t *l) { - static char *p; + static unsigned char *p; char *start = mmf->ptr; /* Remove speed bump */ char *end = mmf->end; /* Remove speed bump */ @@ -101,4 +103,3 @@ mmfgetln(mmf_t *mmf, size_t *l) ++mmf->ptr; return p; } -#endif diff --git a/libexec/ld.elf_so/Makefile b/libexec/ld.elf_so/Makefile index 0ca15ffcd..d0b863276 100644 --- a/libexec/ld.elf_so/Makefile +++ b/libexec/ld.elf_so/Makefile @@ -68,7 +68,7 @@ CLIBOBJ!= cd ${NETBSDSRCDIR}/lib/libc && ${PRINTOBJDIR} SRCS+= rtld.c reloc.c symbol.c xmalloc.c xprintf.c debug.c \ map_object.c load.c search.c headers.c paths.c expand.c \ - tls.c symver.c diagassert.c + tls.c symver.c diagassert.c map_object_fallback.c .if ${USE_FORT} == "yes" .PATH.c: ${NETBSDSRCDIR}/lib/libc/misc diff --git a/libexec/ld.elf_so/map_object.c b/libexec/ld.elf_so/map_object.c index 027deeca3..fad5e4265 100644 --- a/libexec/ld.elf_so/map_object.c +++ b/libexec/ld.elf_so/map_object.c @@ -51,6 +51,10 @@ __RCSID("$NetBSD: map_object.c,v 1.45 2012/10/13 21:13:07 dholland Exp $"); #ifdef __minix #define munmap minix_munmap +#define mmap minix_mmap +#ifndef MAP_SHARED +#define MAP_SHARED MAP_PRIVATE /* minix: MAP_SHARED should be MAP_PRIVATE */ +#endif #endif #define MINIXVERBOSE 0 @@ -63,19 +67,6 @@ static int protflags(int); /* Elf flags -> mmap protection */ #define EA_UNDEF (~(Elf_Addr)0) -static void Pread(void *addr, size_t size, int fd, off_t off) -{ - int s; - if((s=pread(fd,addr, size, off)) < 0) { - _rtld_error("pread failed"); - exit(1); - } - -#if MINIXVERBOSE - fprintf(stderr, "read 0x%lx bytes from offset 0x%lx to addr 0x%lx\n", size, off, addr); -#endif -} - /* * Map a shared object into memory. The argument is a file descriptor, * which must be open on the object and positioned at its beginning. @@ -128,6 +119,7 @@ _rtld_map_object(const char *path, int fd, const struct stat *sb) caddr_t clear_addr; size_t nclear; #endif + size_t bsslen; if (sb != NULL && sb->st_size < (off_t)sizeof (Elf_Ehdr)) { _rtld_error("%s: not ELF file (too short)", path); @@ -142,21 +134,16 @@ _rtld_map_object(const char *path, int fd, const struct stat *sb) obj->ino = sb->st_ino; } -#ifdef __minix - ehdr = minix_mmap(NULL, _rtld_pagesz, PROT_READ|PROT_WRITE, - MAP_PREALLOC|MAP_ANON, -1, (off_t)0); - Pread(ehdr, _rtld_pagesz, fd, 0); -#if MINIXVERBOSE - fprintf(stderr, "minix mmap for header: 0x%lx\n", ehdr); -#endif -#else ehdr = mmap(NULL, _rtld_pagesz, PROT_READ, MAP_FILE | MAP_SHARED, fd, (off_t)0); -#endif obj->ehdr = ehdr; if (ehdr == MAP_FAILED) { +#if defined(__minix) && defined(RTLD_LOADER) + return _rtld_map_object_fallback(path, fd, sb); +#else _rtld_error("%s: read error: %s", path, xstrerror(errno)); goto bad; +#endif } /* Make sure the file is valid */ if (memcmp(ELFMAG, ehdr->e_ident, SELFMAG) != 0) { @@ -346,6 +333,8 @@ _rtld_map_object(const char *path, int fd, const struct stat *sb) /* Unmap header if it overlaps the first load section. */ if (base_offset < _rtld_pagesz) { + dbg(("error; base_offset = 0x%lx, pagesize 0x%lx\n", + base_offset, _rtld_pagesz)); munmap(ehdr, _rtld_pagesz); obj->ehdr = MAP_FAILED; } @@ -370,17 +359,9 @@ _rtld_map_object(const char *path, int fd, const struct stat *sb) #endif mapsize = base_vlimit - base_vaddr; -#ifndef __minix mapbase = mmap(base_addr, mapsize, text_flags, mapflags | MAP_FILE | MAP_PRIVATE, fd, base_offset); -#else - mapbase = minix_mmap(base_addr, mapsize, PROT_READ|PROT_WRITE, - MAP_ANON | MAP_PREALLOC, -1, 0); -#if MINIXVERBOSE - fprintf(stderr, "minix mmap for whole block: 0x%lx-0x%lx\n", mapbase, mapbase+mapsize); -#endif - Pread(mapbase, obj->textsize, fd, 0); -#endif + if (mapbase == MAP_FAILED) { _rtld_error("mmap of entire address space failed: %s", xstrerror(errno)); @@ -389,9 +370,7 @@ _rtld_map_object(const char *path, int fd, const struct stat *sb) /* Overlay the data segment onto the proper region. */ data_addr = mapbase + (data_vaddr - base_vaddr); -#ifdef __minix - Pread(data_addr, data_vlimit - data_vaddr, fd, data_offset); -#else + if (mmap(data_addr, data_vlimit - data_vaddr, data_flags, MAP_FILE | MAP_PRIVATE | MAP_FIXED, fd, data_offset) == MAP_FAILED) { @@ -400,7 +379,13 @@ _rtld_map_object(const char *path, int fd, const struct stat *sb) } /* Overlay the bss segment onto the proper region. */ +#ifdef __minix + bsslen = base_vlimit - data_vlimit; + if (bsslen > 0 && + mmap(mapbase + data_vlimit - base_vaddr, bsslen, +#else if (mmap(mapbase + data_vlimit - base_vaddr, base_vlimit - data_vlimit, +#endif data_flags, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0) == MAP_FAILED) { _rtld_error("mmap of bss failed: %s", xstrerror(errno)); @@ -408,6 +393,7 @@ _rtld_map_object(const char *path, int fd, const struct stat *sb) } /* Unmap the gap between the text and data. */ +#ifndef __minix gap_addr = mapbase + round_up(text_vlimit - base_vaddr); gap_size = data_addr - gap_addr; if (gap_size != 0 && mprotect(gap_addr, gap_size, PROT_NONE) == -1) { @@ -514,5 +500,11 @@ protflags(int elfflags) #endif if (elfflags & PF_X) prot |= PROT_EXEC; +#ifdef __minix + /* Minix has to map it writable so we can do relocations + * as we don't have mprotect() yet. + */ + prot |= PROT_WRITE; +#endif return prot; } diff --git a/libexec/ld.elf_so/map_object_fallback.c b/libexec/ld.elf_so/map_object_fallback.c new file mode 100644 index 000000000..49b72860e --- /dev/null +++ b/libexec/ld.elf_so/map_object_fallback.c @@ -0,0 +1,470 @@ +/* $NetBSD: map_object.c,v 1.45 2012/10/13 21:13:07 dholland Exp $ */ + +/* + * Copyright 1996 John D. Polstra. + * Copyright 1996 Matt Thomas + * Copyright 2002 Charles M. Hannum + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by John Polstra. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#ifndef lint +__RCSID("$NetBSD: map_object.c,v 1.45 2012/10/13 21:13:07 dholland Exp $"); +#endif /* not lint */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "debug.h" +#include "rtld.h" + +#ifdef __minix +#define munmap minix_munmap +#endif + +#define MINIXVERBOSE 0 + +#if MINIXVERBOSE +#include +#endif + +static int protflags(int); /* Elf flags -> mmap protection */ + +#define EA_UNDEF (~(Elf_Addr)0) + +static void Pread(void *addr, size_t size, int fd, off_t off) +{ + int s; + if((s=pread(fd,addr, size, off)) < 0) { + _rtld_error("pread failed"); + exit(1); + } + +#if MINIXVERBOSE + fprintf(stderr, "read 0x%lx bytes from offset 0x%lx to addr 0x%lx\n", size, off, addr); +#endif +} + +/* minix-without-mmap version of _rtld_map_object() */ +Obj_Entry * +_rtld_map_object_fallback(const char *path, int fd, const struct stat *sb) +{ + Obj_Entry *obj; + Elf_Ehdr *ehdr; + Elf_Phdr *phdr; +#if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) + Elf_Phdr *phtls; +#endif + size_t phsize; + Elf_Phdr *phlimit; + Elf_Phdr *segs[2]; + int nsegs; + caddr_t mapbase = MAP_FAILED; + size_t mapsize = 0; + int mapflags; + Elf_Off base_offset; +#ifdef MAP_ALIGNED + Elf_Addr base_alignment; +#endif + Elf_Addr base_vaddr; + Elf_Addr base_vlimit; + Elf_Addr text_vlimit; + int text_flags; + caddr_t base_addr; + Elf_Off data_offset; + Elf_Addr data_vaddr; + Elf_Addr data_vlimit; + int data_flags; + caddr_t data_addr; +#if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) + Elf_Addr tls_vaddr = 0; /* Noise GCC */ +#endif + Elf_Addr phdr_vaddr; + size_t phdr_memsz; +#if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) + caddr_t gap_addr; + size_t gap_size; +#endif + int i; +#ifdef RTLD_LOADER + Elf_Addr clear_vaddr; + caddr_t clear_addr; + size_t nclear; +#endif + + if (sb != NULL && sb->st_size < (off_t)sizeof (Elf_Ehdr)) { + _rtld_error("%s: not ELF file (too short)", path); + return NULL; + } + + obj = _rtld_obj_new(); + obj->path = xstrdup(path); + obj->pathlen = strlen(path); + if (sb != NULL) { + obj->dev = sb->st_dev; + obj->ino = sb->st_ino; + } + +#ifdef __minix + ehdr = minix_mmap(NULL, _rtld_pagesz, PROT_READ|PROT_WRITE, + MAP_PREALLOC|MAP_ANON, -1, (off_t)0); + Pread(ehdr, _rtld_pagesz, fd, 0); +#if MINIXVERBOSE + fprintf(stderr, "minix mmap for header: 0x%lx\n", ehdr); +#endif +#else + ehdr = mmap(NULL, _rtld_pagesz, PROT_READ, MAP_FILE | MAP_SHARED, fd, + (off_t)0); +#endif + obj->ehdr = ehdr; + if (ehdr == MAP_FAILED) { + _rtld_error("%s: read error: %s", path, xstrerror(errno)); + goto bad; + } + /* Make sure the file is valid */ + if (memcmp(ELFMAG, ehdr->e_ident, SELFMAG) != 0) { + _rtld_error("%s: not ELF file (magic number bad)", path); + goto bad; + } + if (ehdr->e_ident[EI_CLASS] != ELFCLASS) { + _rtld_error("%s: invalid ELF class %x; expected %x", path, + ehdr->e_ident[EI_CLASS], ELFCLASS); + goto bad; + } + /* Elf_e_ident includes class */ + if (ehdr->e_ident[EI_VERSION] != EV_CURRENT || + ehdr->e_version != EV_CURRENT || + ehdr->e_ident[EI_DATA] != ELFDEFNNAME(MACHDEP_ENDIANNESS)) { + _rtld_error("%s: unsupported file version", path); + goto bad; + } + if (ehdr->e_type != ET_EXEC && ehdr->e_type != ET_DYN) { + _rtld_error("%s: unsupported file type", path); + goto bad; + } + switch (ehdr->e_machine) { + ELFDEFNNAME(MACHDEP_ID_CASES) + default: + _rtld_error("%s: unsupported machine", path); + goto bad; + } + + /* + * We rely on the program header being in the first page. This is + * not strictly required by the ABI specification, but it seems to + * always true in practice. And, it simplifies things considerably. + */ + assert(ehdr->e_phentsize == sizeof(Elf_Phdr)); + assert(ehdr->e_phoff + ehdr->e_phnum * sizeof(Elf_Phdr) <= + _rtld_pagesz); + + /* + * Scan the program header entries, and save key information. + * + * We rely on there being exactly two load segments, text and data, + * in that order. + */ + phdr = (Elf_Phdr *) ((caddr_t)ehdr + ehdr->e_phoff); +#if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) + phtls = NULL; +#endif + phsize = ehdr->e_phnum * sizeof(phdr[0]); + obj->phdr = NULL; + phdr_vaddr = EA_UNDEF; + phdr_memsz = 0; + phlimit = phdr + ehdr->e_phnum; + nsegs = 0; + while (phdr < phlimit) { + switch (phdr->p_type) { + case PT_INTERP: + obj->interp = (void *)(uintptr_t)phdr->p_vaddr; + dbg(("%s: PT_INTERP %p", obj->path, obj->interp)); + break; + + case PT_LOAD: + if (nsegs < 2) + segs[nsegs] = phdr; + ++nsegs; + +#if ELFSIZE == 64 +#define PRImemsz PRIu64 +#else +#define PRImemsz PRIu32 +#endif + dbg(("%s: %s %p phsize %" PRImemsz, obj->path, "PT_LOAD", + (void *)(uintptr_t)phdr->p_vaddr, phdr->p_memsz)); + break; + + case PT_PHDR: + phdr_vaddr = phdr->p_vaddr; + phdr_memsz = phdr->p_memsz; + dbg(("%s: %s %p phsize %" PRImemsz, obj->path, "PT_PHDR", + (void *)(uintptr_t)phdr->p_vaddr, phdr->p_memsz)); + break; + + case PT_DYNAMIC: + obj->dynamic = (void *)(uintptr_t)phdr->p_vaddr; + dbg(("%s: %s %p phsize %" PRImemsz, obj->path, "PT_DYNAMIC", + (void *)(uintptr_t)phdr->p_vaddr, phdr->p_memsz)); + break; + +#if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) + case PT_TLS: + phtls = phdr; + dbg(("%s: %s %p phsize %" PRImemsz, obj->path, "PT_TLS", + (void *)(uintptr_t)phdr->p_vaddr, phdr->p_memsz)); + break; +#endif + } + + ++phdr; + } + phdr = (Elf_Phdr *) ((caddr_t)ehdr + ehdr->e_phoff); + obj->entry = (void *)(uintptr_t)ehdr->e_entry; + if (!obj->dynamic) { + _rtld_error("%s: not dynamically linked", path); + goto bad; + } + if (nsegs != 2) { + _rtld_error("%s: wrong number of segments (%d != 2)", path, + nsegs); + goto bad; + } + + /* + * Map the entire address space of the object as a file + * region to stake out our contiguous region and establish a + * base for relocation. We use a file mapping so that + * the kernel will give us whatever alignment is appropriate + * for the platform we're running on. + * + * We map it using the text protection, map the data segment + * into the right place, then map an anon segment for the bss + * and unmap the gaps left by padding to alignment. + */ + +#ifdef MAP_ALIGNED + base_alignment = segs[0]->p_align; +#endif + base_offset = round_down(segs[0]->p_offset); + base_vaddr = round_down(segs[0]->p_vaddr); + base_vlimit = round_up(segs[1]->p_vaddr + segs[1]->p_memsz); + text_vlimit = round_up(segs[0]->p_vaddr + segs[0]->p_memsz); + text_flags = protflags(segs[0]->p_flags); + data_offset = round_down(segs[1]->p_offset); + data_vaddr = round_down(segs[1]->p_vaddr); + data_vlimit = round_up(segs[1]->p_vaddr + segs[1]->p_filesz); + data_flags = protflags(segs[1]->p_flags); +#ifdef RTLD_LOADER + clear_vaddr = segs[1]->p_vaddr + segs[1]->p_filesz; +#endif + + obj->textsize = text_vlimit - base_vaddr; + obj->vaddrbase = base_vaddr; + obj->isdynamic = ehdr->e_type == ET_DYN; + +#if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) + if (phtls != NULL) { + ++_rtld_tls_dtv_generation; + obj->tlsindex = ++_rtld_tls_max_index; + obj->tlssize = phtls->p_memsz; + obj->tlsalign = phtls->p_align; + obj->tlsinitsize = phtls->p_filesz; + tls_vaddr = phtls->p_vaddr; + } +#endif + + obj->phdr_loaded = false; + for (i = 0; i < nsegs; i++) { + if (phdr_vaddr != EA_UNDEF && + segs[i]->p_vaddr <= phdr_vaddr && + segs[i]->p_memsz >= phdr_memsz) { + obj->phdr_loaded = true; + break; + } + if (segs[i]->p_offset <= ehdr->e_phoff && + segs[i]->p_memsz >= phsize) { + phdr_vaddr = segs[i]->p_vaddr + ehdr->e_phoff; + phdr_memsz = phsize; + obj->phdr_loaded = true; + break; + } + } + if (obj->phdr_loaded) { + obj->phdr = (void *)(uintptr_t)phdr_vaddr; + obj->phsize = phdr_memsz; + } else { + Elf_Phdr *buf; + buf = xmalloc(phsize); + if (buf == NULL) { + _rtld_error("%s: cannot allocate program header", path); + goto bad; + } + memcpy(buf, phdr, phsize); + obj->phdr = buf; + obj->phsize = phsize; + } + dbg(("%s: phdr %p phsize %zu (%s)", obj->path, obj->phdr, obj->phsize, + obj->phdr_loaded ? "loaded" : "allocated")); + + /* Unmap header if it overlaps the first load section. */ + if (base_offset < _rtld_pagesz) { + munmap(ehdr, _rtld_pagesz); + obj->ehdr = MAP_FAILED; + } + + /* + * Calculate log2 of the base section alignment. + */ + mapflags = 0; +#ifdef MAP_ALIGNED + if (base_alignment > _rtld_pagesz) { + unsigned int log2 = 0; + for (; base_alignment > 1; base_alignment >>= 1) + log2++; + mapflags = MAP_ALIGNED(log2); + } +#endif + +#ifdef RTLD_LOADER + base_addr = obj->isdynamic ? NULL : (caddr_t)base_vaddr; +#else + base_addr = NULL; +#endif + mapsize = base_vlimit - base_vaddr; + +#ifndef __minix + mapbase = mmap(base_addr, mapsize, text_flags, + mapflags | MAP_FILE | MAP_PRIVATE, fd, base_offset); +#else + mapbase = minix_mmap(base_addr, mapsize, PROT_READ|PROT_WRITE, + MAP_ANON | MAP_PREALLOC, -1, 0); +#if MINIXVERBOSE + fprintf(stderr, "minix mmap for whole block: 0x%lx-0x%lx\n", mapbase, mapbase+mapsize); +#endif + Pread(mapbase, obj->textsize, fd, 0); +#endif + if (mapbase == MAP_FAILED) { + _rtld_error("mmap of entire address space failed: %s", + xstrerror(errno)); + goto bad; + } + + /* Overlay the data segment onto the proper region. */ + data_addr = mapbase + (data_vaddr - base_vaddr); +#ifdef __minix + Pread(data_addr, data_vlimit - data_vaddr, fd, data_offset); +#else + if (mmap(data_addr, data_vlimit - data_vaddr, data_flags, + MAP_FILE | MAP_PRIVATE | MAP_FIXED, fd, data_offset) == + MAP_FAILED) { + _rtld_error("mmap of data failed: %s", xstrerror(errno)); + goto bad; + } + + /* Overlay the bss segment onto the proper region. */ + if (mmap(mapbase + data_vlimit - base_vaddr, base_vlimit - data_vlimit, + data_flags, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0) == + MAP_FAILED) { + _rtld_error("mmap of bss failed: %s", xstrerror(errno)); + goto bad; + } + + /* Unmap the gap between the text and data. */ + gap_addr = mapbase + round_up(text_vlimit - base_vaddr); + gap_size = data_addr - gap_addr; + if (gap_size != 0 && mprotect(gap_addr, gap_size, PROT_NONE) == -1) { + _rtld_error("mprotect of text -> data gap failed: %s", + xstrerror(errno)); + goto bad; + } +#endif + +#ifdef RTLD_LOADER + /* Clear any BSS in the last page of the data segment. */ + clear_addr = mapbase + (clear_vaddr - base_vaddr); + if ((nclear = data_vlimit - clear_vaddr) > 0) + memset(clear_addr, 0, nclear); + + /* Non-file portion of BSS mapped above. */ +#endif + +#if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II) + if (phtls != NULL) + obj->tlsinit = mapbase + tls_vaddr; +#endif + + obj->mapbase = mapbase; + obj->mapsize = mapsize; + obj->relocbase = mapbase - base_vaddr; + + if (obj->dynamic) + obj->dynamic = (void *)(obj->relocbase + (Elf_Addr)(uintptr_t)obj->dynamic); + if (obj->entry) + obj->entry = (void *)(obj->relocbase + (Elf_Addr)(uintptr_t)obj->entry); + if (obj->interp) + obj->interp = (void *)(obj->relocbase + (Elf_Addr)(uintptr_t)obj->interp); + if (obj->phdr_loaded) + obj->phdr = (void *)(obj->relocbase + (Elf_Addr)(uintptr_t)obj->phdr); + + return obj; + +bad: + if (obj->ehdr != MAP_FAILED) + munmap(obj->ehdr, _rtld_pagesz); + if (mapbase != MAP_FAILED) + munmap(mapbase, mapsize); + _rtld_obj_free(obj); + return NULL; +} + +/* + * Given a set of ELF protection flags, return the corresponding protection + * flags for MMAP. + */ +static int +protflags(int elfflags) +{ + int prot = 0; + + if (elfflags & PF_R) + prot |= PROT_READ; +#ifdef RTLD_LOADER + if (elfflags & PF_W) + prot |= PROT_WRITE; +#endif + if (elfflags & PF_X) + prot |= PROT_EXEC; + return prot; +} diff --git a/libexec/ld.elf_so/rtld.h b/libexec/ld.elf_so/rtld.h index 0d3253dc9..77d2ef010 100644 --- a/libexec/ld.elf_so/rtld.h +++ b/libexec/ld.elf_so/rtld.h @@ -451,6 +451,7 @@ __dso_public extern void *___tls_get_addr(void *) /* map_object.c */ struct stat; Obj_Entry *_rtld_map_object(const char *, int, const struct stat *); +Obj_Entry *_rtld_map_object_fallback(const char *, int, const struct stat *); void _rtld_obj_free(Obj_Entry *); Obj_Entry *_rtld_obj_new(void); diff --git a/usr.bin/make/parse.c b/usr.bin/make/parse.c index d6dc1e85f..3bc751e6d 100644 --- a/usr.bin/make/parse.c +++ b/usr.bin/make/parse.c @@ -68,6 +68,15 @@ * SUCH DAMAGE. */ + +#ifdef __minix +#define mmap minix_mmap +#define munmap minix_munmap +#ifndef MAP_COPY +#define MAP_COPY MAP_PRIVATE +#endif +#endif + #ifndef MAKE_NATIVE static char rcsid[] = "$NetBSD: parse.c,v 1.185 2012/06/12 19:21:51 joerg Exp $"; #else @@ -133,9 +142,6 @@ __RCSID("$NetBSD: parse.c,v 1.185 2012/06/12 19:21:51 joerg Exp $"); #include #include -#ifndef MAP_FILE -#define MAP_FILE 0 -#endif #ifndef MAP_COPY #define MAP_COPY MAP_PRIVATE #endif @@ -403,9 +409,7 @@ loadedfile_destroy(struct loadedfile *lf) { if (lf->buf != NULL) { if (lf->maplen > 0) { -#ifndef __minix munmap(lf->buf, lf->maplen); -#endif } else { free(lf->buf); } @@ -430,7 +434,6 @@ loadedfile_nextbuf(void *x, size_t *len) return lf->buf; } -#ifndef __minix /* * Try to get the size of a file. */ @@ -463,7 +466,6 @@ load_getsize(int fd, size_t *ret) *ret = (size_t) st.st_size; return SUCCESS; } -#endif /* ndef __minix */ /* * Read in a file. @@ -479,9 +481,7 @@ static struct loadedfile * loadfile(const char *path, int fd) { struct loadedfile *lf; -#ifndef __minix long pagesize; -#endif ssize_t result; size_t bufpos; @@ -501,7 +501,6 @@ loadfile(const char *path, int fd) #endif } -#ifndef __minix if (load_getsize(fd, &lf->len) == SUCCESS) { /* found a size, try mmap */ pagesize = sysconf(_SC_PAGESIZE); @@ -524,6 +523,7 @@ loadfile(const char *path, int fd) * FUTURE: remove PROT_WRITE when the parser no longer * needs to scribble on the input. */ + lf->buf = mmap(NULL, lf->maplen, PROT_READ|PROT_WRITE, MAP_FILE|MAP_COPY, fd, 0); if (lf->buf != MAP_FAILED) { @@ -539,7 +539,6 @@ loadfile(const char *path, int fd) goto done; } } -#endif /* cannot mmap; load the traditional way */ @@ -572,9 +571,7 @@ loadfile(const char *path, int fd) lf->buf = bmake_realloc(lf->buf, lf->len); } -#ifndef __minix done: -#endif /* !defined(__minix) */ if (path != NULL) { close(fd); }