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maybe fix JIT buffer overflow

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svn: r4211
This commit is contained in:
Matthew Flatt 2006-09-01 05:47:38 +00:00
parent 88509cf517
commit 8a20b536a5
1 changed files with 3 additions and 0 deletions
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3
src/mzscheme/src/jit.c
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@ -3925,6 +3925,7 @@ static int generate(Scheme_Object *obj, mz_jit_state *jitter, int is_tail, int m
jit_str_p(JIT_RUNSTACK, JIT_R0);
jit_movi_l(JIT_R0, 1);
ref2 = jit_jmpi(jit_forward());
CHECK_LIMIT();
/* Multiple-values case: ------------ */
mz_patch_branch(ref);
@ -3938,6 +3939,7 @@ static int generate(Scheme_Object *obj, mz_jit_state *jitter, int is_tail, int m
} else {
jit_subr_ul(JIT_R0, JIT_RUNSTACK, JIT_R0);
}
CHECK_LIMIT();
/* R0 is space left (in bytes), R2 is argc */
jit_lshi_l(JIT_R2, JIT_R2, JIT_LOG_WORD_SIZE);
if (is_tail) {
@ -3998,6 +4000,7 @@ static int generate(Scheme_Object *obj, mz_jit_state *jitter, int is_tail, int m
jitter->need_set_rs = 1;
mz_patch_ucbranch(ref5);
}
CHECK_LIMIT();
END_JIT_DATA(81);