diff options
Diffstat (limited to 'gdb/common/agent.c')
| -rw-r--r-- | gdb/common/agent.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/gdb/common/agent.c b/gdb/common/agent.c index 2bd3206..f3bdafc 100644 --- a/gdb/common/agent.c +++ b/gdb/common/agent.c @@ -51,6 +51,7 @@ struct ipa_sym_addresses { CORE_ADDR addr_helper_thread_id; CORE_ADDR addr_cmd_buf; + CORE_ADDR addr_capability; }; /* Cache of the helper thread id. FIXME: this global should be made @@ -65,6 +66,7 @@ static struct } symbol_list[] = { IPA_SYM(helper_thread_id), IPA_SYM(cmd_buf), + IPA_SYM(capability), }; static struct ipa_sym_addresses ipa_sym_addrs; @@ -303,3 +305,41 @@ agent_run_command (int pid, const char *cmd) return 0; } + +/* Each bit of it stands for a capability of agent. */ +static unsigned int agent_capability = 0; + +/* Return true if agent has capability AGENT_CAP, otherwise return false. */ + +int +agent_capability_check (enum agent_capa agent_capa) +{ + if (agent_capability == 0) + { +#ifdef GDBSERVER + if (read_inferior_memory (ipa_sym_addrs.addr_capability, + (unsigned char *) &agent_capability, + sizeof agent_capability)) +#else + enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch); + gdb_byte buf[4]; + + if (target_read_memory (ipa_sym_addrs.addr_capability, + buf, sizeof buf) == 0) + agent_capability = extract_unsigned_integer (buf, sizeof buf, + byte_order); + else +#endif + warning ("Error reading capability of agent"); + } + return agent_capability & agent_capa; +} + +/* Invalidate the cache of agent capability, so we'll read it from inferior + again. Call it when launches a new program or reconnect to remote stub. */ + +void +agent_capability_invalidate (void) +{ + agent_capability = 0; +} |