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| author | Richard Henderson | 2020-10-31 02:59:09 +0100 |
|---|---|---|
| committer | Richard Henderson | 2021-01-07 16:09:41 +0100 |
| commit | 4846cd37df83b24e65a42bb50e5f407cdb50da72 (patch) | |
| tree | a6844d41dcfeac2e0c0d8bf433e112cd56d22fe7 /accel | |
| parent | tcg: Move tcg epilogue pointer out of TCGContext (diff) | |
| download | qemu-4846cd37df83b24e65a42bb50e5f407cdb50da72.tar.gz qemu-4846cd37df83b24e65a42bb50e5f407cdb50da72.tar.xz qemu-4846cd37df83b24e65a42bb50e5f407cdb50da72.zip | |
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 'accel')
| -rw-r--r-- | accel/tcg/translate-all.c | 26 |
1 files changed, 8 insertions, 18 deletions
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index a1803a1026..3f9e25fa0c 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -392,27 +392,18 @@ void tb_destroy(TranslationBlock *tb) bool cpu_restore_state(CPUState *cpu, uintptr_t host_pc, bool will_exit) { - TranslationBlock *tb; - bool r = false; - uintptr_t check_offset; - - /* The host_pc has to be in the region of current code buffer. If - * it is not we will not be able to resolve it here. The two cases - * where host_pc will not be correct are: + /* + * The host_pc has to be in the region of the code buffer. + * If it is not we will not be able to resolve it here. + * The two cases where host_pc will not be correct are: * * - fault during translation (instruction fetch) * - fault from helper (not using GETPC() macro) * * Either way we need return early as we can't resolve it here. - * - * We are using unsigned arithmetic so if host_pc < - * tcg_init_ctx.code_gen_buffer check_offset will wrap to way - * above the code_gen_buffer_size */ - check_offset = host_pc - (uintptr_t) tcg_init_ctx.code_gen_buffer; - - if (check_offset < tcg_init_ctx.code_gen_buffer_size) { - tb = tcg_tb_lookup(host_pc); + if (in_code_gen_buffer((const void *)host_pc)) { + TranslationBlock *tb = tcg_tb_lookup(host_pc); if (tb) { cpu_restore_state_from_tb(cpu, tb, host_pc, will_exit); if (tb_cflags(tb) & CF_NOCACHE) { @@ -421,11 +412,10 @@ bool cpu_restore_state(CPUState *cpu, uintptr_t host_pc, bool will_exit) tcg_tb_remove(tb); tb_destroy(tb); } - r = true; + return true; } } - - return r; + return false; } static void page_init(void) |