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Ensure stack alignment in JIT code.

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* libguile/jit.c (emit_entry_trampoline): Explicitly align stack.
This commit is contained in:
Andy Wingo 2019-04-26 12:45:16 +02:00
parent 5b45f04cc8
commit 14e64a8b57
1 changed files with 4 additions and 0 deletions
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4
libguile/jit.c
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@ -1282,6 +1282,8 @@ emit_entry_trampoline (scm_jit_state *j)
if (jit_fpr_is_callee_save (fprs[i]))
jit_pushr_d (j->jit, fprs[i]);
size_t alignment = jit_align_stack (j->jit, 0);
/* Load our reserved registers: THREAD and SP. Also load IP for the
mcode jump. */
jit_load_args_2 (j->jit, thread_operand (),
@ -1297,6 +1299,8 @@ emit_entry_trampoline (scm_jit_state *j)
/* Initialize global exit_mcode to point here. */
exit_mcode = jit_address (j->jit);
jit_shrink_stack (j->jit, alignment);
/* Restore callee-save registers. */
for (size_t i = 0; i < fpr_count; i++)
if (jit_fpr_is_callee_save (fprs[fpr_count - i - 1]))