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authorAlexander Graf <agraf@suse.de>2009-12-05 12:44:29 +0100
committerAurelien Jarno <aurelien@aurel32.net>2009-12-05 17:36:06 +0100
commitafcb0e4559df1421dcb5df75266769e48b96b46d (patch)
tree8897c285ed64531274ef520f7aafcd0950509ab4 /gdbstub.c
parentAdd S390x virtio machine description (diff)
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S390 GDB stub
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 <agraf@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'gdbstub.c')
-rw-r--r--gdbstub.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/gdbstub.c b/gdbstub.c
index 5a4f7d49b..5320b1c14 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
}