@@ -880,10 +880,26 @@ void tcg_region_init(void)
tcg_region_trees_init();
- /* In user-mode we support only one ctx, so do the initial allocation now */
-#ifdef CONFIG_USER_ONLY
- tcg_region_initial_alloc__locked(tcg_ctx);
-#endif
+ /*
+ * Leave the initial context initialized to the first region.
+ * This will be the context into which we generate the prologue.
+ * It is also the only context for CONFIG_USER_ONLY.
+ */
+ tcg_region_initial_alloc__locked(&tcg_init_ctx);
+}
+
+static void tcg_region_prologue_set(TCGContext *s)
+{
+ /* Deduct the prologue from the first region. */
+ g_assert(region.start == s->code_gen_buffer);
+ region.start = s->code_ptr;
+
+ /* Recompute boundaries of the first region. */
+ tcg_region_assign(s, 0);
+
+ /* Register the balance of the buffer with gdb. */
+ tcg_register_jit(tcg_splitwx_to_rx(region.start),
+ region.end - region.start);
}
#ifdef CONFIG_DEBUG_TCG
@@ -963,10 +979,10 @@ void tcg_register_thread(void)
if (n > 0) {
alloc_tcg_plugin_context(s);
+ tcg_region_initial_alloc(s);
}
tcg_ctx = s;
- tcg_region_initial_alloc(s);
}
#endif /* !CONFIG_USER_ONLY */
@@ -1206,8 +1222,6 @@ void tcg_prologue_init(TCGContext *s)
{
size_t prologue_size;
- /* Put the prologue at the beginning of code_gen_buffer. */
- tcg_region_assign(s, 0);
s->code_ptr = s->code_gen_ptr;
s->code_buf = s->code_gen_ptr;
s->data_gen_ptr = NULL;
@@ -1239,14 +1253,7 @@ void tcg_prologue_init(TCGContext *s)
(uintptr_t)s->code_buf, prologue_size);
#endif
- /* Deduct the prologue from the first region. */
- region.start = s->code_ptr;
-
- /* Recompute boundaries of the first region. */
- tcg_region_assign(s, 0);
-
- tcg_register_jit(tcg_splitwx_to_rx(region.start),
- region.end - region.start);
+ tcg_region_prologue_set(s);
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) {
This has only one user, but will make more sense after some code motion. Always leave the tcg_init_ctx initialized to the first region, in preparation for tcg_prologue_init(). This also requires that we don't re-allocate the region for the first cpu, lest we hit the assertion for total number of regions allocated . Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- tcg/tcg.c | 37 ++++++++++++++++++++++--------------- 1 file changed, 22 insertions(+), 15 deletions(-)