Commit 8c080d3a authored by Vincent Chen's avatar Vincent Chen Committed by Palmer Dabbelt

kgdb: enable arch to support XML packet.

The XML packet could be supported by required architecture if the
architecture defines CONFIG_HAVE_ARCH_KGDB_QXFER_PKT and implement its own
kgdb_arch_handle_qxfer_pkt(). Except for the kgdb_arch_handle_qxfer_pkt(),
the architecture also needs to record the feature supported by gdb stub
into the kgdb_arch_gdb_stub_feature, and these features will be reported
to host gdb when gdb stub receives the qSupported packet.
Signed-off-by: default avatarVincent Chen <vincent.chen@sifive.com>
Acked-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
parent dcb7fd82
......@@ -176,6 +176,17 @@ kgdb_arch_handle_exception(int vector, int signo, int err_code,
char *remcom_out_buffer,
struct pt_regs *regs);
/**
* kgdb_arch_handle_qxfer_pkt - Handle architecture specific GDB XML
* packets.
* @remcom_in_buffer: The buffer of the packet we have read.
* @remcom_out_buffer: The buffer of %BUFMAX bytes to write a packet into.
*/
extern void
kgdb_arch_handle_qxfer_pkt(char *remcom_in_buffer,
char *remcom_out_buffer);
/**
* kgdb_call_nmi_hook - Call kgdb_nmicallback() on the current CPU
* @ignored: This parameter is only here to match the prototype.
......
......@@ -792,6 +792,19 @@ static void gdb_cmd_query(struct kgdb_state *ks)
}
break;
#endif
#ifdef CONFIG_HAVE_ARCH_KGDB_QXFER_PKT
case 'S':
if (!strncmp(remcom_in_buffer, "qSupported:", 11))
strcpy(remcom_out_buffer, kgdb_arch_gdb_stub_feature);
break;
case 'X':
if (!strncmp(remcom_in_buffer, "qXfer:", 6))
kgdb_arch_handle_qxfer_pkt(remcom_in_buffer,
remcom_out_buffer);
break;
#endif
default:
break;
}
}
......
......@@ -3,6 +3,11 @@
config HAVE_ARCH_KGDB
bool
# set if architecture has the its kgdb_arch_handle_qxfer_pkt
# function to enable gdb stub to address XML packet sent from GDB.
config HAVE_ARCH_KGDB_QXFER_PKT
bool
menuconfig KGDB
bool "KGDB: kernel debugger"
depends on HAVE_ARCH_KGDB
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment