[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 09/13] S390 GDB stub
From: |
Alexander Graf |
Subject: |
[Qemu-devel] [PATCH 09/13] S390 GDB stub |
Date: |
Tue, 24 Nov 2009 18:29:37 +0100 |
In order to debug funny kernel breakages it's always good to have a working
gdb stub around.
While Uli's patches don't include one one, I needed one that's at least good
enough for 'bt' and some variable examinations during early bootup.
So here it is - the absolute basics to get the qemu gdb stub running with s390x
targets.
Sgined-off-by: Alexander Graf <address@hidden>
---
gdbstub.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/gdbstub.c b/gdbstub.c
index 055093f..1ba6ad0 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -1348,6 +1348,55 @@ static int cpu_gdb_write_register(CPUState *env, uint8_t
*mem_buf, int n)
return 8;
}
+#elif defined (TARGET_S390X)
+
+#define NUM_CORE_REGS S390_NUM_TOTAL_REGS
+
+static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_PSWM_REGNUM: GET_REGL(env->psw.mask); break;
+ case S390_PSWA_REGNUM: GET_REGL(env->psw.addr); break;
+ case S390_R0_REGNUM ... S390_R15_REGNUM:
+ GET_REGL(env->regs[n-S390_R0_REGNUM]); break;
+ case S390_A0_REGNUM ... S390_A15_REGNUM:
+ GET_REG32(env->aregs[n-S390_A0_REGNUM]); break;
+ case S390_FPC_REGNUM: GET_REG32(env->fpc); break;
+ case S390_F0_REGNUM ... S390_F15_REGNUM:
+ /* XXX */
+ break;
+ case S390_PC_REGNUM: GET_REGL(env->psw.addr); break;
+ case S390_CC_REGNUM: GET_REG32(env->cc); break;
+ }
+
+ return 0;
+}
+
+static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
+{
+ target_ulong tmpl;
+ uint32_t tmp32;
+ int r = 8;
+ tmpl = ldtul_p(mem_buf);
+ tmp32 = ldl_p(mem_buf);
+
+ switch (n) {
+ case S390_PSWM_REGNUM: env->psw.mask = tmpl; break;
+ case S390_PSWA_REGNUM: env->psw.addr = tmpl; break;
+ case S390_R0_REGNUM ... S390_R15_REGNUM:
+ env->regs[n-S390_R0_REGNUM] = tmpl; break;
+ case S390_A0_REGNUM ... S390_A15_REGNUM:
+ env->aregs[n-S390_A0_REGNUM] = tmp32; r=4; break;
+ case S390_FPC_REGNUM: env->fpc = tmp32; r=4; break;
+ case S390_F0_REGNUM ... S390_F15_REGNUM:
+ /* XXX */
+ break;
+ case S390_PC_REGNUM: env->psw.addr = tmpl; break;
+ case S390_CC_REGNUM: env->cc = tmp32; r=4; break;
+ }
+
+ return r;
+}
#else
#define NUM_CORE_REGS 0
@@ -1616,6 +1665,9 @@ static void gdb_set_cpu_pc(GDBState *s, target_ulong pc)
s->c_cpu->pc = pc;
#elif defined (TARGET_ALPHA)
s->c_cpu->pc = pc;
+#elif defined (TARGET_S390X)
+ cpu_synchronize_state(s->c_cpu);
+ s->c_cpu->psw.addr = pc;
#endif
}
--
1.6.0.2
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, (continued)
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Anthony Liguori, 2009/11/24
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Alexander Graf, 2009/11/24
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Anthony Liguori, 2009/11/24
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Alexander Graf, 2009/11/24
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Anthony Liguori, 2009/11/24
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Alexander Graf, 2009/11/24
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Carsten Otte, 2009/11/25
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Arnd Bergmann, 2009/11/25
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Carsten Otte, 2009/11/25
- Re: [Qemu-devel] [PATCH 10/13] Implement early printk in virtio-console, Carsten Otte, 2009/11/25
[Qemu-devel] [PATCH 09/13] S390 GDB stub,
Alexander Graf <=
[Qemu-devel] [PATCH 07/13] Add S390x virtio machine bus, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 05/13] Allocate physical memory in low virtual address space, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 08/13] Add S390x virtio machine description, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 13/13] Add S390 maintainer information, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 11/13] Set default console to virtio on S390x, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 04/13] Add KVM support for S390x, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 02/13] S/390 host/target build system support, Alexander Graf, 2009/11/24
[Qemu-devel] [PATCH 06/13] Add support for S390x system emulation, Alexander Graf, 2009/11/24