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Index: head/sys/amd64/amd64/gdb_machdep.c
===================================================================
--- head/sys/amd64/amd64/gdb_machdep.c
+++ head/sys/amd64/amd64/gdb_machdep.c
@@ -48,6 +48,8 @@
void *
gdb_cpu_getreg(int regnum, size_t *regsz)
{
+ static uint32_t _kcodesel = GSEL(GCODE_SEL, SEL_KPL);
+ static uint32_t _kdatasel = GSEL(GDATA_SEL, SEL_KPL);
*regsz = gdb_cpu_regsz(regnum);
@@ -76,6 +78,8 @@
case 14: return (&kdb_thrctx->pcb_r14);
case 15: return (&kdb_thrctx->pcb_r15);
case 16: return (&kdb_thrctx->pcb_rip);
+ case 18: return (&_kcodesel);
+ case 19: return (&_kdatasel);
}
return (NULL);
}
Index: head/sys/i386/i386/gdb_machdep.c
===================================================================
--- head/sys/i386/i386/gdb_machdep.c
+++ head/sys/i386/i386/gdb_machdep.c
@@ -45,14 +45,22 @@
void *
gdb_cpu_getreg(int regnum, size_t *regsz)
{
+ static uint32_t _kcodesel = GSEL(GCODE_SEL, SEL_KPL);
+ static uint32_t _kdatasel = GSEL(GDATA_SEL, SEL_KPL);
+ static uint32_t _kprivsel = GSEL(GPRIV_SEL, SEL_KPL);
*regsz = gdb_cpu_regsz(regnum);
- if (kdb_thread == curthread) {
+ if (kdb_thread == curthread) {
switch (regnum) {
case 0: return (&kdb_frame->tf_eax);
case 1: return (&kdb_frame->tf_ecx);
case 2: return (&kdb_frame->tf_edx);
+ case 9: return (&kdb_frame->tf_eflags);
+ case 10: return (&kdb_frame->tf_cs);
+ case 12: return (&kdb_frame->tf_ds);
+ case 13: return (&kdb_frame->tf_es);
+ case 14: return (&kdb_frame->tf_fs);
}
}
switch (regnum) {
@@ -62,6 +70,12 @@
case 6: return (&kdb_thrctx->pcb_esi);
case 7: return (&kdb_thrctx->pcb_edi);
case 8: return (&kdb_thrctx->pcb_eip);
+ case 10: return (&_kcodesel);
+ case 11: return (&_kdatasel);
+ case 12: return (&_kdatasel);
+ case 13: return (&_kdatasel);
+ case 14: return (&_kprivsel);
+ case 15: return (&kdb_thrctx->pcb_gs);
}
return (NULL);
}
Index: head/sys/i386/i386/machdep.c
===================================================================
--- head/sys/i386/i386/machdep.c
+++ head/sys/i386/i386/machdep.c
@@ -2867,6 +2867,7 @@
pcb->pcb_ebx = tf->tf_ebx;
pcb->pcb_eip = tf->tf_eip;
pcb->pcb_esp = (ISPL(tf->tf_cs)) ? tf->tf_esp : (int)(tf + 1) - 8;
+ pcb->pcb_gs = rgs();
}
int
Index: head/sys/i386/include/gdb_machdep.h
===================================================================
--- head/sys/i386/include/gdb_machdep.h
+++ head/sys/i386/include/gdb_machdep.h
@@ -30,7 +30,7 @@
#define _MACHINE_GDB_MACHDEP_H_
#define GDB_BUFSZ 400
-#define GDB_NREGS 14
+#define GDB_NREGS 16
#define GDB_REG_PC 8
static __inline size_t

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