diff options
Diffstat (limited to 'fs/binfmt_elf_fdpic.c')
| -rw-r--r-- | fs/binfmt_elf_fdpic.c | 54 |
1 files changed, 15 insertions, 39 deletions
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 32d9b44c3cb9..63edf40b569b 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -34,6 +34,7 @@ #include <linux/elf.h> #include <linux/elf-fdpic.h> #include <linux/elfcore.h> +#include <linux/coredump.h> #include <asm/uaccess.h> #include <asm/param.h> @@ -1216,37 +1217,6 @@ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params, #ifdef CONFIG_ELF_CORE /* - * These are the only things you should do on a core-file: use only these - * functions to write out all the necessary info. - */ -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; -} - -/* * Decide whether a segment is worth dumping; default is yes to be * sure (missing info is worse than too much; etc). * Personally I'd include everything, and use the coredump limit... @@ -1354,11 +1324,6 @@ static int writenote(struct memelfnote *men, struct file *file, } #undef DUMP_WRITE -#define DUMP_WRITE(addr, nr) \ - if ((size += (nr)) > cprm->limit || \ - !dump_write(cprm->file, (addr), (nr))) \ - goto end_coredump; - static inline void fill_elf_fdpic_header(struct elfhdr *elf, int segs) { memcpy(elf->e_ident, ELFMAG, SELFMAG); @@ -1743,7 +1708,11 @@ static int elf_fdpic_core_dump(struct coredump_params *cprm) fs = get_fs(); set_fs(KERNEL_DS); - DUMP_WRITE(elf, sizeof(*elf)); + size += sizeof(*elf); + if (size > cprm->limit + || !dump_write(cprm->file, elf, sizeof(*elf))) + goto end_coredump; + offset += sizeof(*elf); /* Elf header */ offset += (segs+1) * sizeof(struct elf_phdr); /* Program headers */ foffset = offset; @@ -1760,7 +1729,11 @@ static int elf_fdpic_core_dump(struct coredump_params *cprm) fill_elf_note_phdr(&phdr, sz, offset); offset += sz; - DUMP_WRITE(&phdr, sizeof(phdr)); + + size += sizeof(phdr); + if (size > cprm->limit + || !dump_write(cprm->file, &phdr, sizeof(phdr))) + goto end_coredump; } /* Page-align dumped data */ @@ -1794,7 +1767,10 @@ static int elf_fdpic_core_dump(struct coredump_params *cprm) phdr.p_flags |= PF_X; phdr.p_align = ELF_EXEC_PAGESIZE; - DUMP_WRITE(&phdr, sizeof(phdr)); + size += sizeof(phdr); + if (size > cprm->limit + || !dump_write(cprm->file, &phdr, sizeof(phdr))) + goto end_coredump; } #ifdef ELF_CORE_WRITE_EXTRA_PHDRS |