diff options
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/region.c | 34 | ||||
| -rw-r--r-- | tcg/tcg.c | 23 |
2 files changed, 34 insertions, 23 deletions
diff --git a/tcg/region.c b/tcg/region.c index 445a278702..5beba41412 100644 --- a/tcg/region.c +++ b/tcg/region.c @@ -68,6 +68,40 @@ static struct tcg_region_state region; static void *region_trees; static size_t tree_size; +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; +} + +#ifdef CONFIG_DEBUG_TCG +const void *tcg_splitwx_to_rx(void *rw) +{ + /* Pass NULL pointers unchanged. */ + if (rw) { + g_assert(in_code_gen_buffer(rw)); + rw += tcg_splitwx_diff; + } + return rw; +} + +void *tcg_splitwx_to_rw(const void *rx) +{ + /* Pass NULL pointers unchanged. */ + if (rx) { + rx -= tcg_splitwx_diff; + /* Assert that we end with a pointer in the rw region. */ + g_assert(in_code_gen_buffer(rx)); + } + return (void *)rx; +} +#endif /* CONFIG_DEBUG_TCG */ + /* compare a pointer @ptr and a tb_tc @s */ static int ptr_cmp_tb_tc(const void *ptr, const struct tb_tc *s) { @@ -416,29 +416,6 @@ static const TCGTargetOpDef constraint_sets[] = { #include "tcg-target.c.inc" -#ifdef CONFIG_DEBUG_TCG -const void *tcg_splitwx_to_rx(void *rw) -{ - /* Pass NULL pointers unchanged. */ - if (rw) { - g_assert(in_code_gen_buffer(rw)); - rw += tcg_splitwx_diff; - } - return rw; -} - -void *tcg_splitwx_to_rw(const void *rx) -{ - /* Pass NULL pointers unchanged. */ - if (rx) { - rx -= tcg_splitwx_diff; - /* Assert that we end with a pointer in the rw region. */ - g_assert(in_code_gen_buffer(rx)); - } - return (void *)rx; -} -#endif /* CONFIG_DEBUG_TCG */ - static void alloc_tcg_plugin_context(TCGContext *s) { #ifdef CONFIG_PLUGIN |