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tcg: Infrastructure for managing constant pools

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A new shared header tcg-pool.inc.c adds new_pool_label,
for registering a tcg_target_ulong to be emitted after
the generated code, plus relocation data to install a
pointer to the data.

A new pointer is added to the TCGContext, so that we
dump the constant pool as data, not code.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2017-07-30 13:13:21 -07:00
parent 659ef5cbb8
commit 57a269469d
4 changed files with 119 additions and 1 deletions
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9
tcg/tcg.c
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@ -399,6 +399,7 @@ TranslationBlock *tcg_tb_alloc(TCGContext *s)
return NULL;
}
s->code_gen_ptr = next;
s->data_gen_ptr = NULL;
return tb;
}
@ -2619,6 +2620,9 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
#ifdef TCG_TARGET_NEED_LDST_LABELS
s->ldst_labels = NULL;
#endif
#ifdef TCG_TARGET_NEED_POOL_LABELS
s->pool_labels = NULL;
#endif
num_insns = -1;
for (oi = s->gen_op_buf[0].next; oi != 0; oi = oi_next) {
@ -2698,6 +2702,11 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
return -1;
}
#endif
#ifdef TCG_TARGET_NEED_POOL_LABELS
if (!tcg_out_pool_finalize(s)) {
return -1;
}
#endif
/* flush instruction cache */
flush_icache_range((uintptr_t)s->code_buf, (uintptr_t)s->code_ptr);