diff options
Diffstat (limited to 'fs/binfmt_flat.c')
| -rw-r--r-- | fs/binfmt_flat.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index 42c6b4a54445..b6ab27ccf214 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -56,15 +56,22 @@ #endif /* - * User data (stack, data section and bss) needs to be aligned - * for the same reasons as SLAB memory is, and to the same amount. - * Avoid duplicating architecture specific code by using the same - * macro as with SLAB allocation: + * User data (data section and bss) needs to be aligned. + * We pick 0x20 here because it is the max value elf2flt has always + * used in producing FLAT files, and because it seems to be large + * enough to make all the gcc alignment related tests happy. + */ +#define FLAT_DATA_ALIGN (0x20) + +/* + * User data (stack) also needs to be aligned. + * Here we can be a bit looser than the data sections since this + * needs to only meet arch ABI requirements. */ #ifdef ARCH_SLAB_MINALIGN -#define FLAT_DATA_ALIGN (ARCH_SLAB_MINALIGN) +#define FLAT_STACK_ALIGN (ARCH_SLAB_MINALIGN) #else -#define FLAT_DATA_ALIGN (sizeof(void *)) +#define FLAT_STACK_ALIGN (sizeof(void *)) #endif #define RELOC_FAILED 0xff00ff01 /* Relocation incorrect somewhere */ @@ -129,7 +136,7 @@ static unsigned long create_flat_tables( sp = (unsigned long *)p; sp -= (envc + argc + 2) + 1 + (flat_argvp_envp_on_stack() ? 2 : 0); - sp = (unsigned long *) ((unsigned long)sp & -FLAT_DATA_ALIGN); + sp = (unsigned long *) ((unsigned long)sp & -FLAT_STACK_ALIGN); argv = sp + 1 + (flat_argvp_envp_on_stack() ? 2 : 0); envp = argv + (argc + 1); @@ -355,7 +362,7 @@ calc_reloc(unsigned long r, struct lib_info *p, int curid, int internalp) if (!flat_reloc_valid(r, start_brk - start_data + text_len)) { printk("BINFMT_FLAT: reloc outside program 0x%x (0 - 0x%x/0x%x)", - (int) r,(int)(start_brk-start_code),(int)text_len); + (int) r,(int)(start_brk-start_data+text_len),(int)text_len); goto failed; } @@ -501,7 +508,7 @@ static int load_flat_file(struct linux_binprm * bprm, * size limits imposed on them by creating programs with large * arrays in the data or bss. */ - rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur; + rlim = rlimit(RLIMIT_DATA); if (rlim >= RLIM_INFINITY) rlim = ~0; if (data_len + bss_len > rlim) { @@ -589,7 +596,7 @@ static int load_flat_file(struct linux_binprm * bprm, if (IS_ERR_VALUE(result)) { printk("Unable to read data+bss, errno %d\n", (int)-result); do_munmap(current->mm, textpos, text_len); - do_munmap(current->mm, realdatastart, data_len + extra); + do_munmap(current->mm, realdatastart, len); ret = result; goto err; } @@ -876,7 +883,7 @@ static int load_flat_binary(struct linux_binprm * bprm, struct pt_regs * regs) stack_len = TOP_OF_ARGS - bprm->p; /* the strings */ stack_len += (bprm->argc + 1) * sizeof(char *); /* the argv array */ stack_len += (bprm->envc + 1) * sizeof(char *); /* the envp array */ - stack_len += FLAT_DATA_ALIGN - 1; /* reserve for upcoming alignment */ + stack_len += FLAT_STACK_ALIGN - 1; /* reserve for upcoming alignment */ res = load_flat_file(bprm, &libinfo, 0, &stack_len); if (IS_ERR_VALUE(res)) |