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[PATCH] Support invoking the debugger over the serial console
From: |
Justus Winter |
Subject: |
[PATCH] Support invoking the debugger over the serial console |
Date: |
Thu, 21 Aug 2014 12:14:50 +0200 |
* i386/i386at/com.c (comintr): Invoke the debugger if ctrl-alt-d is
pressed.
* i386/i386at/com.h (kdb_kintr): Add declaration.
---
i386/i386at/com.c | 23 ++++++++++++++++++++++-
i386/i386at/com.h | 4 ++++
2 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/i386/i386at/com.c b/i386/i386at/com.c
index 5e65ad8..8a81b76 100644
--- a/i386/i386at/com.c
+++ b/i386/i386at/com.c
@@ -518,9 +518,30 @@ comintr(int unit)
case RECi:
case CTIi: /* Character timeout indication */
if (tp->t_state&TS_ISOPEN) {
+ int escape = 0;
while ((line = inb(LINE_STAT(addr))) & iDR) {
c = inb(TXRX(addr));
- ttyinput(c, tp);
+
+ if (c == 0x1b) {
+ escape = 1;
+ continue;
+ }
+
+#if MACH_KDB
+ if (escape && c == 4)
+ /* ctrl-alt-d pressed,
+ invoke debugger */
+ kdb_kintr();
+ else
+#endif /* MACH_KDB */
+ if (escape) {
+ ttyinput(0x1b, tp);
+ ttyinput(c, tp);
+ }
+ else
+ ttyinput(c, tp);
+
+ escape = 0;
}
} else
tt_open_wakeup(tp);
diff --git a/i386/i386at/com.h b/i386/i386at/com.h
index 95baa45..779cdba 100644
--- a/i386/i386at/com.h
+++ b/i386/i386at/com.h
@@ -71,6 +71,10 @@ comsetstat(
int *data,
natural_t count);
+#if MACH_KDB
+extern void kdb_kintr(void);
+#endif /* MACH_KDB */
+
extern io_return_t comopen(dev_t dev, int flag, io_req_t ior);
extern void comclose(dev_t dev, int flag);
extern io_return_t comread(dev_t dev, io_req_t ior);
--
2.1.0.rc1
- [PATCH] Support invoking the debugger over the serial console,
Justus Winter <=