diff options
Diffstat (limited to 'fs/binfmt_aout.c')
| -rw-r--r-- | fs/binfmt_aout.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c index 61dd00a6c7b4..d2f8872dd767 100644 --- a/fs/binfmt_aout.c +++ b/fs/binfmt_aout.c @@ -69,16 +69,32 @@ static int dump_write(struct file *file, const void *addr, int nr) return file->f_op->write(file, addr, nr, &file->f_pos) == nr; } +static int dump_seek(struct file *file, loff_t off) +{ + if (file->f_op->llseek && file->f_op->llseek != no_llseek) { + if (file->f_op->llseek(file, off, SEEK_CUR) < 0) + return 0; + } else { + char *buf = (char *)get_zeroed_page(GFP_KERNEL); + if (!buf) + return 0; + while (off > 0) { + unsigned long n = off; + if (n > PAGE_SIZE) + n = PAGE_SIZE; + if (!dump_write(file, buf, n)) + return 0; + off -= n; + } + free_page((unsigned long)buf); + } + return 1; +} + #define DUMP_WRITE(addr, nr) \ if (!dump_write(file, (void *)(addr), (nr))) \ goto end_coredump; -#define DUMP_SEEK(offset) \ -if (file->f_op->llseek) { \ - if (file->f_op->llseek(file,(offset),0) != (offset)) \ - goto end_coredump; \ -} else file->f_pos = (offset) - /* * Routine writes a core dump image in the current directory. * Currently only a stub-function. @@ -132,7 +148,8 @@ static int aout_core_dump(struct coredump_params *cprm) /* struct user */ DUMP_WRITE(&dump,sizeof(dump)); /* Now dump all of the user data. Include malloced stuff as well */ - DUMP_SEEK(PAGE_SIZE); + if (!dump_seek(cprm->file, PAGE_SIZE - sizeof(dump))) + goto end_coredump; /* now we start writing out the user space info */ set_fs(USER_DS); /* Dump the data area */ |