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Fetch the NT_ARM_TLS register set for native FreeBSD/arm processes.

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This permits resolving TLS variables.
This commit is contained in:
John Baldwin
2022-05-03 16:05:10 -07:00
parent 2e686a74dc
commit 684943d213
1 changed files with 51 additions and 1 deletions
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52
gdb/arm-fbsd-nat.c
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@ -18,13 +18,17 @@
along with this program. If not, see <http://www.gnu.org/licenses/>. */ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h" #include "defs.h"
#include "inferior.h"
#include "target.h" #include "target.h"
#include "elf/common.h"
#include <sys/types.h> #include <sys/types.h>
#include <sys/ptrace.h> #include <sys/ptrace.h>
#include <machine/reg.h> #include <machine/reg.h>
#include "fbsd-nat.h" #include "fbsd-nat.h"
#include "arm-tdep.h"
#include "arm-fbsd-tdep.h" #include "arm-fbsd-tdep.h"
#include "inf-ptrace.h" #include "inf-ptrace.h"
@ -49,6 +53,27 @@ arm_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
fetch_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS, fetch_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS,
&arm_fbsd_vfpregset); &arm_fbsd_vfpregset);
#endif #endif
#ifdef PT_GETREGSET
gdbarch *gdbarch = regcache->arch ();
arm_gdbarch_tdep *tdep = (arm_gdbarch_tdep *) gdbarch_tdep (gdbarch);
if (tdep->tls_regnum > 0)
{
const struct regcache_map_entry arm_fbsd_tlsregmap[] =
{
{ 1, tdep->tls_regnum, 4 },
{ 0 }
};
const struct regset arm_fbsd_tlsregset =
{
arm_fbsd_tlsregmap,
regcache_supply_regset, regcache_collect_regset
};
fetch_regset<uint32_t> (regcache, regnum, NT_ARM_TLS, &arm_fbsd_tlsregset);
}
#endif
} }
/* Store register REGNUM back into the inferior. If REGNUM is -1, do /* Store register REGNUM back into the inferior. If REGNUM is -1, do
@ -63,6 +88,27 @@ arm_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
store_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS, store_register_set<struct vfpreg> (regcache, regnum, PT_GETVFPREGS,
PT_SETVFPREGS, &arm_fbsd_vfpregset); PT_SETVFPREGS, &arm_fbsd_vfpregset);
#endif #endif
#ifdef PT_GETREGSET
gdbarch *gdbarch = regcache->arch ();
arm_gdbarch_tdep *tdep = (arm_gdbarch_tdep *) gdbarch_tdep (gdbarch);
if (tdep->tls_regnum > 0)
{
const struct regcache_map_entry arm_fbsd_tlsregmap[] =
{
{ 1, tdep->tls_regnum, 4 },
{ 0 }
};
const struct regset arm_fbsd_tlsregset =
{
arm_fbsd_tlsregmap,
regcache_supply_regset, regcache_collect_regset
};
store_regset<uint32_t> (regcache, regnum, NT_ARM_TLS, &arm_fbsd_tlsregset);
}
#endif
} }
/* Implement the to_read_description method. */ /* Implement the to_read_description method. */
@ -71,8 +117,12 @@ const struct target_desc *
arm_fbsd_nat_target::read_description () arm_fbsd_nat_target::read_description ()
{ {
const struct target_desc *desc; const struct target_desc *desc;
bool tls = false;
desc = arm_fbsd_read_description_auxv (this, false); #ifdef PT_GETREGSET
tls = have_regset (inferior_ptid, NT_ARM_TLS) != 0;
#endif
desc = arm_fbsd_read_description_auxv (this, tls);
if (desc == NULL) if (desc == NULL)
desc = this->beneath ()->read_description (); desc = this->beneath ()->read_description ();
return desc; return desc;