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authorOllie Wild <aaw@google.com>2007-07-19 04:48:16 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 13:04:45 -0400
commitb6a2fea39318e43fee84fa7b0b90d68bed92d2ba (patch)
treec9c3619cb2730b5c10c7427b837146bce3d69156 /fs/binfmt_misc.c
parentbdf4c48af20a3b0f01671799ace345e3d49576da (diff)
mm: variable length argument support
Remove the arg+env limit of MAX_ARG_PAGES by copying the strings directly from the old mm into the new mm. We create the new mm before the binfmt code runs, and place the new stack at the very top of the address space. Once the binfmt code runs and figures out where the stack should be, we move it downwards. It is a bit peculiar in that we have one task with two mm's, one of which is inactive. [a.p.zijlstra@chello.nl: limit stack size] Signed-off-by: Ollie Wild <aaw@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: <linux-arch@vger.kernel.org> Cc: Hugh Dickins <hugh@veritas.com> [bunk@stusta.de: unexport bprm_mm_init] Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/binfmt_misc.c')
-rw-r--r--fs/binfmt_misc.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 330fd3fe8546..42e94b3ab7be 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -126,7 +126,9 @@ static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs)
126 goto _ret; 126 goto _ret;
127 127
128 if (!(fmt->flags & MISC_FMT_PRESERVE_ARGV0)) { 128 if (!(fmt->flags & MISC_FMT_PRESERVE_ARGV0)) {
129 remove_arg_zero(bprm); 129 retval = remove_arg_zero(bprm);
130 if (retval)
131 goto _ret;
130 } 132 }
131 133
132 if (fmt->flags & MISC_FMT_OPEN_BINARY) { 134 if (fmt->flags & MISC_FMT_OPEN_BINARY) {