X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fbinfmt_flat.c;h=33764fd6db66122ff36b52fba3ebf95f26d4a5d7;hb=197cd65accc6a274dabcd81f4811ba5d9a4856df;hp=c94d52eafd1bc3c98c9ca5108228ebd762565d36;hpb=4d3ce21fa9d2eaeda113aa2f9c2da80d972bef64;p=linux-2.6 diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index c94d52eafd..33764fd6db 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -16,7 +16,6 @@ */ #include -#include #include #include #include @@ -76,7 +75,7 @@ static int load_flat_shared_library(int id, struct lib_info *p); #endif static int load_flat_binary(struct linux_binprm *, struct pt_regs * regs); -static int flat_core_dump(long signr, struct pt_regs * regs, struct file *file); +static int flat_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit); static struct linux_binfmt flat_format = { .module = THIS_MODULE, @@ -91,7 +90,7 @@ static struct linux_binfmt flat_format = { * Currently only a stub-function. */ -static int flat_core_dump(long signr, struct pt_regs * regs, struct file *file) +static int flat_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit) { printk("Process %s:%d received signr %d and should have core dumped\n", current->comm, current->pid, (int) signr); @@ -114,7 +113,7 @@ static unsigned long create_flat_tables( char * p = (char*)pp; int argc = bprm->argc; int envc = bprm->envc; - char dummy; + char uninitialized_var(dummy); sp = (unsigned long *) ((-(unsigned long)sizeof(char *))&(unsigned long) p); @@ -291,7 +290,6 @@ out_free_buf: kfree(buf); out_free: kfree(strm.workspace); -out: return retval; } @@ -420,7 +418,7 @@ static int load_flat_file(struct linux_binprm * bprm, unsigned long textpos = 0, datapos = 0, result; unsigned long realdatastart = 0; unsigned long text_len, data_len, bss_len, stack_len, flags; - unsigned long memp = 0; /* for finding the brk area */ + unsigned long len, reallen, memp = 0; unsigned long extra, rlim; unsigned long *reloc = 0, *rp; struct inode *inode; @@ -430,7 +428,7 @@ static int load_flat_file(struct linux_binprm * bprm, int ret; hdr = ((struct flat_hdr *) bprm->buf); /* exec-header */ - inode = bprm->file->f_dentry->d_inode; + inode = bprm->file->f_path.dentry->d_inode; text_len = ntohl(hdr->data_start); data_len = ntohl(hdr->data_end) - ntohl(hdr->data_start); @@ -460,7 +458,9 @@ static int load_flat_file(struct linux_binprm * bprm, 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%x and 0x%x)\n", rev, FLAT_VERSION, 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; } @@ -516,7 +516,8 @@ static int load_flat_file(struct linux_binprm * bprm, /* * calculate the extra space we need to map in */ - extra = max(bss_len + stack_len, relocs * sizeof(unsigned long)); + extra = max_t(unsigned long, bss_len + stack_len, + relocs * sizeof(unsigned long)); /* * there are a couple of cases here, the separate code/data @@ -541,17 +542,25 @@ static int load_flat_file(struct linux_binprm * bprm, goto err; } + len = data_len + extra + MAX_SHARED_LIBS * sizeof(unsigned long); down_write(¤t->mm->mmap_sem); - realdatastart = do_mmap(0, 0, data_len + extra + - MAX_SHARED_LIBS * sizeof(unsigned long), - PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, 0); + realdatastart = do_mmap(0, 0, len, + PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, 0); + /* Remap to use all availabe slack region space */ + if (realdatastart && (realdatastart < (unsigned long)-4096)) { + reallen = ksize((void *)realdatastart); + if (reallen > len) { + realdatastart = do_mremap(realdatastart, len, + reallen, MREMAP_FIXED, realdatastart); + } + } up_write(¤t->mm->mmap_sem); if (realdatastart == 0 || realdatastart >= (unsigned long)-4096) { if (!realdatastart) realdatastart = (unsigned long) -ENOMEM; printk("Unable to allocate RAM for process data, errno %d\n", - (int)-datapos); + (int)-realdatastart); do_munmap(current->mm, textpos, text_len); ret = realdatastart; goto err; @@ -585,11 +594,20 @@ static int load_flat_file(struct linux_binprm * bprm, } else { + len = text_len + data_len + extra + MAX_SHARED_LIBS * sizeof(unsigned long); down_write(¤t->mm->mmap_sem); - textpos = do_mmap(0, 0, text_len + data_len + extra + - MAX_SHARED_LIBS * sizeof(unsigned long), - PROT_READ | PROT_EXEC | PROT_WRITE, MAP_PRIVATE, 0); + textpos = do_mmap(0, 0, len, + PROT_READ | PROT_EXEC | PROT_WRITE, MAP_PRIVATE, 0); + /* Remap to use all availabe slack region space */ + if (textpos && (textpos < (unsigned long) -4096)) { + reallen = ksize((void *)textpos); + if (reallen > len) { + textpos = do_mremap(textpos, len, reallen, + MREMAP_FIXED, textpos); + } + } up_write(¤t->mm->mmap_sem); + if (!textpos || textpos >= (unsigned long) -4096) { if (!textpos) textpos = (unsigned long) -ENOMEM; @@ -726,6 +744,7 @@ static int load_flat_file(struct linux_binprm * bprm, * __start to address 4 so that is okay). */ if (rev > OLD_FLAT_VERSION) { + unsigned long persistent = 0; for (i=0; i < relocs; i++) { unsigned long addr, relval; @@ -733,6 +752,8 @@ static int load_flat_file(struct linux_binprm * bprm, relocated (of course, the address has to be relocated first). */ relval = ntohl(reloc[i]); + if (flat_set_persistent (relval, &persistent)) + continue; addr = flat_get_relocate_addr(relval); rp = (unsigned long *) calc_reloc(addr, libinfo, id, 1); if (rp == (unsigned long *)RELOC_FAILED) { @@ -741,7 +762,8 @@ static int load_flat_file(struct linux_binprm * bprm, } /* Get the pointer's value. */ - addr = flat_get_addr_from_rp(rp, relval, flags); + addr = flat_get_addr_from_rp(rp, relval, flags, + &persistent); if (addr != 0) { /* * Do the relocation. PIC relocs in the data section are