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authorRichard Henderson <richard.henderson@linaro.org>2020-10-30 18:59:09 -0700
committerRichard Henderson <richard.henderson@linaro.org>2021-01-07 05:09:41 -1000
commit4846cd37df83b24e65a42bb50e5f407cdb50da72 (patch)
treea6844d41dcfeac2e0c0d8bf433e112cd56d22fe7 /include
parent8b5c2b6260c0bb1233f605663bec9582b55d80c9 (diff)
tcg: Add in_code_gen_buffer
Create a function to determine if a pointer is within the buffer. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'include')
-rw-r--r--include/tcg/tcg.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index bb1e97b13b..ef571b6f3e 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -680,6 +680,17 @@ extern __thread TCGContext *tcg_ctx;
extern void *tcg_code_gen_epilogue;
extern TCGv_env cpu_env;
+static inline bool in_code_gen_buffer(const void *p)
+{
+ const TCGContext *s = &tcg_init_ctx;
+ /*
+ * Much like it is valid to have a pointer to the byte past the
+ * end of an array (so long as you don't dereference it), allow
+ * a pointer to the byte past the end of the code gen buffer.
+ */
+ return (size_t)(p - s->code_gen_buffer) <= s->code_gen_buffer_size;
+}
+
static inline size_t temp_idx(TCGTemp *ts)
{
ptrdiff_t n = ts - tcg_ctx->temps;