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authorRajithaY <rajithax.yerrumsetty@intel.com>2017-04-25 03:31:15 -0700
committerRajitha Yerrumchetty <rajithax.yerrumsetty@intel.com>2017-05-22 06:48:08 +0000
commitbb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch)
treeca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/linux-user/flatload.c
parenta14b48d18a9ed03ec191cf16b162206998a895ce (diff)
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to kvmfornfv repo and make use of the updated latest qemu for the execution of all testcase Change-Id: I1280af507a857675c7f81d30c95255635667bdd7 Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/linux-user/flatload.c')
-rw-r--r--qemu/linux-user/flatload.c808
1 files changed, 0 insertions, 808 deletions
diff --git a/qemu/linux-user/flatload.c b/qemu/linux-user/flatload.c
deleted file mode 100644
index f9139c399..000000000
--- a/qemu/linux-user/flatload.c
+++ /dev/null
@@ -1,808 +0,0 @@
-/****************************************************************************/
-/*
- * QEMU bFLT binary loader. Based on linux/fs/binfmt_flat.c
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- *
- * Copyright (C) 2006 CodeSourcery.
- * 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)
- */
-
-/* ??? ZFLAT and shared library support is currently disabled. */
-
-/****************************************************************************/
-
-#include "qemu/osdep.h"
-#include <sys/mman.h>
-
-#include "qemu.h"
-#include "flat.h"
-#include <target_flat.h>
-
-//#define DEBUG
-
-#ifdef DEBUG
-#define DBG_FLT(...) printf(__VA_ARGS__)
-#else
-#define DBG_FLT(...)
-#endif
-
-#define RELOC_FAILED 0xff00ff01 /* Relocation incorrect somewhere */
-#define UNLOADED_LIB 0x7ff000ff /* Placeholder for unused library */
-
-struct lib_info {
- abi_ulong start_code; /* Start of text segment */
- abi_ulong start_data; /* Start of data segment */
- abi_ulong end_data; /* Start of bss section */
- abi_ulong start_brk; /* End of data segment */
- abi_ulong text_len; /* Length of text segment */
- abi_ulong entry; /* Start address for this module */
- abi_ulong build_date; /* When this one was compiled */
- short loaded; /* Has this library been loaded? */
-};
-
-#ifdef CONFIG_BINFMT_SHARED_FLAT
-static int load_flat_shared_library(int id, struct lib_info *p);
-#endif
-
-struct linux_binprm;
-
-/****************************************************************************/
-/*
- * 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.
- */
-
-/* Push a block of strings onto the guest stack. */
-static abi_ulong copy_strings(abi_ulong p, int n, char **s)
-{
- int len;
-
- while (n-- > 0) {
- len = strlen(s[n]) + 1;
- p -= len;
- memcpy_to_target(p, s[n], len);
- }
-
- return p;
-}
-
-static int target_pread(int fd, abi_ulong ptr, abi_ulong len,
- abi_ulong offset)
-{
- void *buf;
- int ret;
-
- buf = lock_user(VERIFY_WRITE, ptr, len, 0);
- ret = pread(fd, buf, len, offset);
- unlock_user(buf, ptr, len);
- return ret;
-}
-/****************************************************************************/
-
-#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 = bprm->file->f_op->read(bprm->file, buf, LBUFSIZE, &fpos);
-
- strm.next_in = buf;
- strm.avail_in = ret;
- strm.total_in = 0;
-
- 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) {
- for (; ret < LBUFSIZE && (buf[ret] != 0); ret++)
- ;
- if (unlikely(LBUFSIZE == ret)) {
- DBG_FLT("binfmt_flat: buffer overflow (ORIG_NAME)?\n");
- goto out_free_buf;
- }
- }
- if (buf[3] & COMMENT) {
- for (; ret < LBUFSIZE && (buf[ret] != 0); ret++)
- ;
- 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 = bprm->file->f_op->read(bprm->file, buf, LBUFSIZE, &fpos);
- if (ret <= 0)
- break;
- if (ret >= (unsigned long) -4096)
- break;
- len -= ret;
-
- strm.next_in = buf;
- strm.avail_in = ret;
- strm.total_in = 0;
- }
-
- 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);
-out:
- return retval;
-}
-
-#endif /* CONFIG_BINFMT_ZFLAT */
-
-/****************************************************************************/
-
-static abi_ulong
-calc_reloc(abi_ulong r, struct lib_info *p, int curid, int internalp)
-{
- abi_ulong addr;
- int id;
- abi_ulong start_brk;
- abi_ulong start_data;
- abi_ulong text_len;
- abi_ulong start_code;
-
-#ifdef CONFIG_BINFMT_SHARED_FLAT
-#error needs checking
- 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) {
- fprintf(stderr, "BINFMT_FLAT: reference 0x%x to shared library %d\n",
- (unsigned) r, id);
- goto failed;
- }
- if (curid != id) {
- if (internalp) {
- fprintf(stderr, "BINFMT_FLAT: reloc address 0x%x not "
- "in same module (%d != %d)\n",
- (unsigned) r, curid, id);
- goto failed;
- } else if ( ! p[id].loaded &&
- load_flat_shared_library(id, p) > (unsigned long) -4096) {
- fprintf(stderr, "BINFMT_FLAT: failed to load library %d\n", id);
- goto failed;
- }
- /* Check versioning information (i.e. time stamps) */
- if (p[id].build_date && p[curid].build_date
- && p[curid].build_date < p[id].build_date) {
- fprintf(stderr, "BINFMT_FLAT: library %d is younger than %d\n",
- id, curid);
- goto failed;
- }
- }
-#else
- id = 0;
-#endif
-
- start_brk = p[id].start_brk;
- start_data = p[id].start_data;
- start_code = p[id].start_code;
- text_len = p[id].text_len;
-
- if (!flat_reloc_valid(r, start_brk - start_data + text_len)) {
- fprintf(stderr, "BINFMT_FLAT: reloc outside program 0x%x "
- "(0 - 0x%x/0x%x)\n",
- (int) r,(int)(start_brk-start_code),(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:
- abort();
- return RELOC_FAILED;
-}
-
-/****************************************************************************/
-
-/* ??? This does not handle endianness correctly. */
-static void old_reloc(struct lib_info *libinfo, uint32_t rl)
-{
-#ifdef DEBUG
- const char *segment[] = { "TEXT", "DATA", "BSS", "*UNKNOWN*" };
-#endif
- uint32_t *ptr;
- uint32_t offset;
- int reloc_type;
-
- offset = rl & 0x3fffffff;
- reloc_type = rl >> 30;
- /* ??? How to handle this? */
-#if defined(CONFIG_COLDFIRE)
- ptr = (uint32_t *) ((unsigned long) libinfo->start_code + offset);
-#else
- ptr = (uint32_t *) ((unsigned long) libinfo->start_data + offset);
-#endif
-
-#ifdef DEBUG
- fprintf(stderr, "Relocation of variable at DATASEG+%x "
- "(address %p, currently %x) into segment %s\n",
- offset, ptr, (int)*ptr, segment[reloc_type]);
-#endif
-
- switch (reloc_type) {
- case OLD_FLAT_RELOC_TYPE_TEXT:
- *ptr += libinfo->start_code;
- break;
- case OLD_FLAT_RELOC_TYPE_DATA:
- *ptr += libinfo->start_data;
- break;
- case OLD_FLAT_RELOC_TYPE_BSS:
- *ptr += libinfo->end_data;
- break;
- default:
- fprintf(stderr, "BINFMT_FLAT: Unknown relocation type=%x\n",
- reloc_type);
- break;
- }
- DBG_FLT("Relocation became %x\n", (int)*ptr);
-}
-
-/****************************************************************************/
-
-static int load_flat_file(struct linux_binprm * bprm,
- struct lib_info *libinfo, int id, abi_ulong *extra_stack)
-{
- struct flat_hdr * hdr;
- abi_ulong textpos = 0, datapos = 0;
- abi_long result;
- abi_ulong realdatastart = 0;
- abi_ulong text_len, data_len, bss_len, stack_len, flags;
- abi_ulong extra;
- abi_ulong reloc = 0, rp;
- int i, rev, relocs = 0;
- abi_ulong fpos;
- abi_ulong start_code;
- abi_ulong indx_len;
-
- hdr = ((struct flat_hdr *) bprm->buf); /* exec-header */
-
- 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);
-
- DBG_FLT("BINFMT_FLAT: Loading file: %s\n", bprm->filename);
-
- if (rev != FLAT_VERSION && rev != OLD_FLAT_VERSION) {
- fprintf(stderr, "BINFMT_FLAT: bad magic/rev (0x%x, need 0x%x)\n",
- rev, (int) FLAT_VERSION);
- return -ENOEXEC;
- }
-
- /* Don't allow old format executables to use shared libraries */
- if (rev == OLD_FLAT_VERSION && id != 0) {
- fprintf(stderr, "BINFMT_FLAT: shared libraries are not available\n");
- return -ENOEXEC;
- }
-
- /*
- * 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)) {
- fprintf(stderr, "Support for ZFLAT executables is not enabled\n");
- return -ENOEXEC;
- }
-#endif
-
- /*
- * calculate the extra space we need to map in
- */
- extra = relocs * sizeof(abi_ulong);
- if (extra < bss_len + stack_len)
- extra = bss_len + stack_len;
-
- /* Add space for library base pointers. Make sure this does not
- misalign the doesn't misalign the data segment. */
- indx_len = MAX_SHARED_LIBS * sizeof(abi_ulong);
- indx_len = (indx_len + 15) & ~(abi_ulong)15;
-
- /*
- * there are a couple of cases here, the separate code/data
- * case, and then the fully copied to RAM case which lumps
- * it all together.
- */
- if ((flags & (FLAT_FLAG_RAM|FLAT_FLAG_GZIP)) == 0) {
- /*
- * this should give us a ROM ptr, but if it doesn't we don't
- * really care
- */
- DBG_FLT("BINFMT_FLAT: ROM mapping of file (we hope)\n");
-
- textpos = target_mmap(0, text_len, PROT_READ|PROT_EXEC,
- MAP_PRIVATE, bprm->fd, 0);
- if (textpos == -1) {
- fprintf(stderr, "Unable to mmap process text\n");
- return -1;
- }
-
- realdatastart = target_mmap(0, data_len + extra + indx_len,
- PROT_READ|PROT_WRITE|PROT_EXEC,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-
- if (realdatastart == -1) {
- fprintf(stderr, "Unable to allocate RAM for process data\n");
- return realdatastart;
- }
- datapos = realdatastart + indx_len;
-
- DBG_FLT("BINFMT_FLAT: Allocated data+bss+stack (%d bytes): %x\n",
- (int)(data_len + bss_len + stack_len), (int)datapos);
-
- fpos = ntohl(hdr->data_start);
-#ifdef CONFIG_BINFMT_ZFLAT
- if (flags & FLAT_FLAG_GZDATA) {
- result = decompress_exec(bprm, fpos, (char *) datapos,
- data_len + (relocs * sizeof(abi_ulong)))
- } else
-#endif
- {
- result = target_pread(bprm->fd, datapos,
- data_len + (relocs * sizeof(abi_ulong)),
- fpos);
- }
- if (result < 0) {
- fprintf(stderr, "Unable to read data+bss\n");
- return result;
- }
-
- reloc = datapos + (ntohl(hdr->reloc_start) - text_len);
-
- } else {
-
- textpos = target_mmap(0, text_len + data_len + extra + indx_len,
- PROT_READ | PROT_EXEC | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
- if (textpos == -1 ) {
- fprintf(stderr, "Unable to allocate RAM for process text/data\n");
- return -1;
- }
-
- realdatastart = textpos + ntohl(hdr->data_start);
- datapos = realdatastart + indx_len;
- reloc = (textpos + ntohl(hdr->reloc_start) + indx_len);
-
-#ifdef CONFIG_BINFMT_ZFLAT
-#error code needs checking
- /*
- * load it all in and treat it like a RAM load from now on
- */
- if (flags & FLAT_FLAG_GZIP) {
- result = decompress_exec(bprm, sizeof (struct flat_hdr),
- (((char *) textpos) + sizeof (struct flat_hdr)),
- (text_len + data_len + (relocs * sizeof(unsigned long))
- - sizeof (struct flat_hdr)),
- 0);
- memmove((void *) datapos, (void *) realdatastart,
- data_len + (relocs * sizeof(unsigned long)));
- } else if (flags & FLAT_FLAG_GZDATA) {
- fpos = 0;
- result = bprm->file->f_op->read(bprm->file,
- (char *) textpos, text_len, &fpos);
- if (result < (unsigned long) -4096)
- result = decompress_exec(bprm, text_len, (char *) datapos,
- data_len + (relocs * sizeof(unsigned long)), 0);
- }
- else
-#endif
- {
- result = target_pread(bprm->fd, textpos,
- text_len, 0);
- if (result >= 0) {
- result = target_pread(bprm->fd, datapos,
- data_len + (relocs * sizeof(abi_ulong)),
- ntohl(hdr->data_start));
- }
- }
- if (result < 0) {
- fprintf(stderr, "Unable to read code+data+bss\n");
- return result;
- }
- }
-
- DBG_FLT("Mapping is 0x%x, Entry point is 0x%x, data_start is 0x%x\n",
- (int)textpos, 0x00ffffff&ntohl(hdr->entry),
- ntohl(hdr->data_start));
-
- /* The main program needs a little extra setup in the task structure */
- start_code = textpos + sizeof (struct flat_hdr);
-
- DBG_FLT("%s %s: TEXT=%x-%x DATA=%x-%x BSS=%x-%x\n",
- id ? "Lib" : "Load", bprm->filename,
- (int) start_code, (int) (textpos + text_len),
- (int) datapos,
- (int) (datapos + data_len),
- (int) (datapos + data_len),
- (int) (((datapos + data_len + bss_len) + 3) & ~3));
-
- text_len -= sizeof(struct flat_hdr); /* the real code len */
-
- /* Store the current module values into the global library structure */
- libinfo[id].start_code = start_code;
- libinfo[id].start_data = datapos;
- libinfo[id].end_data = datapos + data_len;
- libinfo[id].start_brk = datapos + data_len + bss_len;
- libinfo[id].text_len = text_len;
- libinfo[id].loaded = 1;
- libinfo[id].entry = (0x00ffffff & ntohl(hdr->entry)) + textpos;
- libinfo[id].build_date = ntohl(hdr->build_date);
-
- /*
- * We just load the allocations into some temporary memory to
- * help simplify all this mumbo jumbo
- *
- * We've got two different sections of relocation entries.
- * The first is the GOT which resides at the beginning of the data segment
- * and is terminated with a -1. This one can be relocated in place.
- * The second is the extra relocation entries tacked after the image's
- * data segment. These require a little more processing as the entry is
- * really an offset into the image which contains an offset into the
- * image.
- */
- if (flags & FLAT_FLAG_GOTPIC) {
- rp = datapos;
- while (1) {
- abi_ulong addr;
- if (get_user_ual(addr, rp))
- return -EFAULT;
- if (addr == -1)
- break;
- if (addr) {
- addr = calc_reloc(addr, libinfo, id, 0);
- if (addr == RELOC_FAILED)
- return -ENOEXEC;
- if (put_user_ual(addr, rp))
- return -EFAULT;
- }
- rp += sizeof(abi_ulong);
- }
- }
-
- /*
- * Now run through the relocation entries.
- * We've got to be careful here as C++ produces relocatable zero
- * entries in the constructor and destructor tables which are then
- * tested for being not zero (which will always occur unless we're
- * based from address zero). This causes an endless loop as __start
- * is at zero. The solution used is to not relocate zero addresses.
- * This has the negative side effect of not allowing a global data
- * reference to be statically initialised to _stext (I've moved
- * __start to address 4 so that is okay).
- */
- if (rev > OLD_FLAT_VERSION) {
- abi_ulong persistent = 0;
- for (i = 0; i < relocs; i++) {
- abi_ulong addr, relval;
-
- /* Get the address of the pointer to be
- relocated (of course, the address has to be
- relocated first). */
- if (get_user_ual(relval, reloc + i * sizeof(abi_ulong)))
- return -EFAULT;
- relval = ntohl(relval);
- if (flat_set_persistent(relval, &persistent))
- continue;
- addr = flat_get_relocate_addr(relval);
- rp = calc_reloc(addr, libinfo, id, 1);
- if (rp == RELOC_FAILED)
- return -ENOEXEC;
-
- /* Get the pointer's value. */
- if (get_user_ual(addr, rp))
- return -EFAULT;
- addr = flat_get_addr_from_rp(addr, relval, flags, &persistent);
- if (addr != 0) {
- /*
- * Do the relocation. PIC relocs in the data section are
- * already in target order
- */
- if ((flags & FLAT_FLAG_GOTPIC) == 0)
- addr = ntohl(addr);
- addr = calc_reloc(addr, libinfo, id, 0);
- if (addr == RELOC_FAILED)
- return -ENOEXEC;
-
- /* Write back the relocated pointer. */
- if (flat_put_addr_at_rp(rp, addr, relval))
- return -EFAULT;
- }
- }
- } else {
- for (i = 0; i < relocs; i++) {
- abi_ulong relval;
- if (get_user_ual(relval, reloc + i * sizeof(abi_ulong)))
- return -EFAULT;
- old_reloc(&libinfo[0], relval);
- }
- }
-
- /* zero the BSS. */
- memset(g2h(datapos + data_len), 0, bss_len);
-
- return 0;
-}
-
-
-/****************************************************************************/
-#ifdef CONFIG_BINFMT_SHARED_FLAT
-
-/*
- * Load a shared library into memory. The library gets its own data
- * segment (including bss) but not argv/argc/environ.
- */
-
-static int load_flat_shared_library(int id, struct lib_info *libs)
-{
- struct linux_binprm bprm;
- int res;
- char buf[16];
-
- /* Create the file name */
- sprintf(buf, "/lib/lib%d.so", id);
-
- /* Open the file up */
- bprm.filename = buf;
- bprm.file = open_exec(bprm.filename);
- res = PTR_ERR(bprm.file);
- if (IS_ERR(bprm.file))
- return res;
-
- res = prepare_binprm(&bprm);
-
- if (res <= (unsigned long)-4096)
- res = load_flat_file(&bprm, libs, id, NULL);
- if (bprm.file) {
- allow_write_access(bprm.file);
- fput(bprm.file);
- bprm.file = NULL;
- }
- return(res);
-}
-
-#endif /* CONFIG_BINFMT_SHARED_FLAT */
-
-int load_flt_binary(struct linux_binprm *bprm, struct image_info *info)
-{
- struct lib_info libinfo[MAX_SHARED_LIBS];
- abi_ulong p;
- abi_ulong stack_len;
- abi_ulong start_addr;
- abi_ulong sp;
- int res;
- int i, j;
-
- memset(libinfo, 0, sizeof(libinfo));
- /*
- * We have to add the size of our arguments to our stack size
- * otherwise it's too easy for users to create stack overflows
- * by passing in a huge argument list. And yes, we have to be
- * pedantic and include space for the argv/envp array as it may have
- * a lot of entries.
- */
- stack_len = 0;
- for (i = 0; i < bprm->argc; ++i) {
- /* the argv strings */
- stack_len += strlen(bprm->argv[i]);
- }
- for (i = 0; i < bprm->envc; ++i) {
- /* the envp strings */
- stack_len += strlen(bprm->envp[i]);
- }
- stack_len += (bprm->argc + 1) * 4; /* the argv array */
- stack_len += (bprm->envc + 1) * 4; /* the envp array */
-
-
- res = load_flat_file(bprm, libinfo, 0, &stack_len);
- if (res > (unsigned long)-4096)
- return res;
-
- /* Update data segment pointers for all libraries */
- for (i=0; i<MAX_SHARED_LIBS; i++) {
- if (libinfo[i].loaded) {
- abi_ulong p;
- p = libinfo[i].start_data;
- for (j=0; j<MAX_SHARED_LIBS; j++) {
- p -= 4;
- /* FIXME - handle put_user() failures */
- if (put_user_ual(libinfo[j].loaded
- ? libinfo[j].start_data
- : UNLOADED_LIB,
- p))
- return -EFAULT;
- }
- }
- }
-
- p = ((libinfo[0].start_brk + stack_len + 3) & ~3) - 4;
- DBG_FLT("p=%x\n", (int)p);
-
- /* Copy argv/envp. */
- p = copy_strings(p, bprm->envc, bprm->envp);
- p = copy_strings(p, bprm->argc, bprm->argv);
- /* Align stack. */
- sp = p & ~(abi_ulong)(sizeof(abi_ulong) - 1);
- /* Enforce final stack alignment of 16 bytes. This is sufficient
- for all current targets, and excess alignment is harmless. */
- stack_len = bprm->envc + bprm->argc + 2;
- stack_len += 3; /* argc, arvg, argp */
- stack_len *= sizeof(abi_ulong);
- if ((sp + stack_len) & 15)
- sp -= 16 - ((sp + stack_len) & 15);
- sp = loader_build_argptr(bprm->envc, bprm->argc, sp, p,
- flat_argvp_envp_on_stack());
-
- /* Fake some return addresses to ensure the call chain will
- * initialise library in order for us. We are required to call
- * lib 1 first, then 2, ... and finally the main program (id 0).
- */
- start_addr = libinfo[0].entry;
-
-#ifdef CONFIG_BINFMT_SHARED_FLAT
-#error here
- for (i = MAX_SHARED_LIBS-1; i>0; i--) {
- if (libinfo[i].loaded) {
- /* Push previos first to call address */
- --sp;
- if (put_user_ual(start_addr, sp))
- return -EFAULT;
- start_addr = libinfo[i].entry;
- }
- }
-#endif
-
- /* Stash our initial stack pointer into the mm structure */
- info->start_code = libinfo[0].start_code;
- info->end_code = libinfo[0].start_code = libinfo[0].text_len;
- info->start_data = libinfo[0].start_data;
- info->end_data = libinfo[0].end_data;
- info->start_brk = libinfo[0].start_brk;
- info->start_stack = sp;
- info->stack_limit = libinfo[0].start_brk;
- info->entry = start_addr;
- info->code_offset = info->start_code;
- info->data_offset = info->start_data - libinfo[0].text_len;
-
- DBG_FLT("start_thread(entry=0x%x, start_stack=0x%x)\n",
- (int)info->entry, (int)info->start_stack);
-
- return 0;
-}