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s390x/gdb: expose virtualization specific registers 

Let's expose some virtual/fake registers as virtualization specific
registers.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Message-Id: <1443689387-34473-3-git-send-email-jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2015-10-01 10:49:44 +02:00 committed by Christian Borntraeger
parent af3c15fee5
commit 8a641ff60f
3 changed files with 101 additions and 1 deletions
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2
configure vendored
View File

@ -5457,7 +5457,7 @@ case "$target_name" in
echo "TARGET_ABI32=y" >> $config_target_mak
;;
s390x)
gdb_xml_files="s390x-core64.xml s390-acr.xml s390-fpr.xml s390-vx.xml s390-cr.xml"
gdb_xml_files="s390x-core64.xml s390-acr.xml s390-fpr.xml s390-vx.xml s390-cr.xml s390-virt.xml"
;;
tilegx)
;;

18
gdb-xml/s390-virt.xml Normal file
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@ -0,0 +1,18 @@
<?xml version="1.0"?>
<!-- Copyright 2015 IBM Corp.
This work is licensed under the terms of the GNU GPL, version 2 or
(at your option) any later version. See the COPYING file in the
top-level directory. -->
<!DOCTYPE feature SYSTEM "gdb-target.dtd">
<feature name="org.gnu.gdb.s390.virt">
<reg name="ckc" bitsize="64" type="uint64" group="system"/>
<reg name="cputm" bitsize="64" type="uint64" group="system"/>
<reg name="last_break" bitsize="64" type="code_ptr" group="system"/>
<reg name="prefix" bitsize="64" type="data_ptr" group="system"/>
<reg name="pp" bitsize="64" type="uint64" group="system"/>
<reg name="pfault_token" bitsize="64" type="uint64" group="system"/>
<reg name="pfault_select" bitsize="64" type="uint64" group="system"/>
<reg name="pfault_compare" bitsize="64" type="uint64" group="system"/>
</feature>

82
target-s390x/gdbstub.c
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@ -205,6 +205,82 @@ static int cpu_write_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
return 0;
}
}
/* the values represent the positions in s390-virt.xml */
#define S390_VIRT_CKC_REGNUM 0
#define S390_VIRT_CPUTM_REGNUM 1
#define S390_VIRT_BEA_REGNUM 2
#define S390_VIRT_PREFIX_REGNUM 3
#define S390_VIRT_PP_REGNUM 4
#define S390_VIRT_PFT_REGNUM 5
#define S390_VIRT_PFS_REGNUM 6
#define S390_VIRT_PFC_REGNUM 7
/* total number of registers in s390-virt.xml */
#define S390_NUM_VIRT_REGS 8
static int cpu_read_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
{
switch (n) {
case S390_VIRT_CKC_REGNUM:
return gdb_get_regl(mem_buf, env->ckc);
case S390_VIRT_CPUTM_REGNUM:
return gdb_get_regl(mem_buf, env->cputm);
case S390_VIRT_BEA_REGNUM:
return gdb_get_regl(mem_buf, env->gbea);
case S390_VIRT_PREFIX_REGNUM:
return gdb_get_regl(mem_buf, env->psa);
case S390_VIRT_PP_REGNUM:
return gdb_get_regl(mem_buf, env->pp);
case S390_VIRT_PFT_REGNUM:
return gdb_get_regl(mem_buf, env->pfault_token);
case S390_VIRT_PFS_REGNUM:
return gdb_get_regl(mem_buf, env->pfault_select);
case S390_VIRT_PFC_REGNUM:
return gdb_get_regl(mem_buf, env->pfault_compare);
default:
return 0;
}
}
static int cpu_write_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
{
switch (n) {
case S390_VIRT_CKC_REGNUM:
env->ckc = ldtul_p(mem_buf);
cpu_synchronize_post_init(ENV_GET_CPU(env));
return 8;
case S390_VIRT_CPUTM_REGNUM:
env->cputm = ldtul_p(mem_buf);
cpu_synchronize_post_init(ENV_GET_CPU(env));
return 8;
case S390_VIRT_BEA_REGNUM:
env->gbea = ldtul_p(mem_buf);
cpu_synchronize_post_init(ENV_GET_CPU(env));
return 8;
case S390_VIRT_PREFIX_REGNUM:
env->psa = ldtul_p(mem_buf);
cpu_synchronize_post_init(ENV_GET_CPU(env));
return 8;
case S390_VIRT_PP_REGNUM:
env->pp = ldtul_p(mem_buf);
cpu_synchronize_post_init(ENV_GET_CPU(env));
return 8;
case S390_VIRT_PFT_REGNUM:
env->pfault_token = ldtul_p(mem_buf);
cpu_synchronize_post_init(ENV_GET_CPU(env));
return 8;
case S390_VIRT_PFS_REGNUM:
env->pfault_select = ldtul_p(mem_buf);
cpu_synchronize_post_init(ENV_GET_CPU(env));
return 8;
case S390_VIRT_PFC_REGNUM:
env->pfault_compare = ldtul_p(mem_buf);
cpu_synchronize_post_init(ENV_GET_CPU(env));
return 8;
default:
return 0;
}
}
#endif
void s390_cpu_gdb_init(CPUState *cs)
@ -225,5 +301,11 @@ void s390_cpu_gdb_init(CPUState *cs)
gdb_register_coprocessor(cs, cpu_read_c_reg,
cpu_write_c_reg,
S390_NUM_C_REGS, "s390-cr.xml", 0);
if (kvm_enabled()) {
gdb_register_coprocessor(cs, cpu_read_virt_reg,
cpu_write_virt_reg,
S390_NUM_VIRT_REGS, "s390-virt.xml", 0);
}
#endif
}