diff options
| author | Alex Bennée <alex.bennee@linaro.org> | 2023-03-02 18:57:49 -0800 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2023-03-07 20:44:08 +0000 |
| commit | a7e0f9bd2ace16df2aa557b0670c20bfe9cef280 (patch) | |
| tree | e5a4475e780edf11cafa7c340376bf91b914586f /gdbstub | |
| parent | ccd4c7c24a722288127eff2a4dc2793e6a3c04f0 (diff) | |
gdbstub: abstract target specific details from gdb_put_packet_binary
We unfortunately handle the checking of packet acknowledgement
differently for user and softmmu modes. Abstract the user mode stuff
behind gdb_got_immediate_ack with a stub for softmmu.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230302190846.2593720-14-alex.bennee@linaro.org>
Message-Id: <20230303025805.625589-14-richard.henderson@linaro.org>
Diffstat (limited to 'gdbstub')
| -rw-r--r-- | gdbstub/gdbstub.c | 10 | ||||
| -rw-r--r-- | gdbstub/internals.h | 15 | ||||
| -rw-r--r-- | gdbstub/softmmu.c | 8 | ||||
| -rw-r--r-- | gdbstub/user.c | 19 |
4 files changed, 44 insertions, 8 deletions
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c index 6907bdc99c..0476ee7039 100644 --- a/gdbstub/gdbstub.c +++ b/gdbstub/gdbstub.c @@ -239,15 +239,9 @@ int gdb_put_packet_binary(const char *buf, int len, bool dump) gdb_put_buffer(gdbserver_state.last_packet->data, gdbserver_state.last_packet->len); -#ifdef CONFIG_USER_ONLY - i = gdb_get_char(); - if (i < 0) - return -1; - if (i == '+') + if (gdb_got_immediate_ack()) { break; -#else - break; -#endif + } } return 0; } diff --git a/gdbstub/internals.h b/gdbstub/internals.h index 6bd6a05657..6534e373cb 100644 --- a/gdbstub/internals.h +++ b/gdbstub/internals.h @@ -110,6 +110,21 @@ void gdb_memtohex(GString *buf, const uint8_t *mem, int len); void gdb_memtox(GString *buf, const char *mem, int len); void gdb_read_byte(uint8_t ch); +/* + * Packet acknowledgement - we handle this slightly differently + * between user and softmmu mode, mainly to deal with the differences + * between the flexible chardev and the direct fd approaches. + * + * We currently don't support a negotiated QStartNoAckMode + */ + +/** + * gdb_got_immediate_ack() - check ok to continue + * + * Returns true to continue, false to re-transmit for user only, the + * softmmu stub always returns true. + */ +bool gdb_got_immediate_ack(void); /* utility helpers */ CPUState *gdb_first_attached_cpu(void); void gdb_append_thread_id(CPUState *cpu, GString *buf); diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c index 6796761fd9..04e75449a2 100644 --- a/gdbstub/softmmu.c +++ b/gdbstub/softmmu.c @@ -56,6 +56,14 @@ int gdb_get_cpu_index(CPUState *cpu) } /* + * We check the status of the last message in the chardev receive code + */ +bool gdb_got_immediate_ack(void) +{ + return true; +} + +/* * GDB Connection management. For system emulation we do all of this * via our existing Chardev infrastructure which allows us to support * network and unix sockets. diff --git a/gdbstub/user.c b/gdbstub/user.c index 23b2e726f6..0c8cd028b1 100644 --- a/gdbstub/user.c +++ b/gdbstub/user.c @@ -54,6 +54,25 @@ int gdb_get_char(void) return ch; } +bool gdb_got_immediate_ack(void) +{ + int i; + + i = gdb_get_char(); + if (i < 0) { + /* no response, continue anyway */ + return true; + } + + if (i == '+') { + /* received correctly, continue */ + return true; + } + + /* anything else, including '-' then try again */ + return false; +} + void gdb_put_buffer(const uint8_t *buf, int len) { int ret; |