gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / proc-service.c

diff --git a/gdb/proc-service.c b/gdb/proc-service.c
index 8afa667a06af8776938f3daa626bb6637c6370f5..e0383700a1d711b682904d01dea2be6246c2f195 100644 (file)
--- a/gdb/proc-service.c
+++ b/gdb/proc-service.c
@@ -1,6 +1,6 @@
 /* <proc_service.h> implementation.
 
-   Copyright (C) 1999-2018 Free Software Foundation, Inc.
+   Copyright (C) 1999-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -21,6 +21,7 @@
 
 #include "gdbcore.h"
 #include "inferior.h"
+#include "gdbthread.h"
 #include "symtab.h"
 #include "target.h"
 #include "regcache.h"
@@ -69,17 +70,22 @@ static ps_err_e
 ps_xfer_memory (const struct ps_prochandle *ph, psaddr_t addr,
                gdb_byte *buf, size_t len, int write)
 {
+  scoped_restore_current_inferior restore_inferior;
+  set_current_inferior (ph->thread->inf);
+
+  scoped_restore_current_program_space restore_current_progspace;
+  set_current_program_space (ph->thread->inf->pspace);
+
   scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
-  int ret;
-  CORE_ADDR core_addr = ps_addr_to_core_addr (addr);
+  inferior_ptid = ph->thread->ptid;
 
-  inferior_ptid = ph->ptid;
+  CORE_ADDR core_addr = ps_addr_to_core_addr (addr);
 
+  int ret;
   if (write)
     ret = target_write_memory (core_addr, buf, len);
   else
     ret = target_read_memory (core_addr, buf, len);
-
   return (ret == 0 ? PS_OK : PS_ERR);
 }
 \f
@@ -92,7 +98,7 @@ ps_err_e
 ps_pglobal_lookup (struct ps_prochandle *ph, const char *obj,
                   const char *name, psaddr_t *sym_addr)
 {
-  struct inferior *inf = find_inferior_ptid (ph->ptid);
+  inferior *inf = ph->thread->inf;
 
   scoped_restore_current_program_space restore_pspace;
 
@@ -125,15 +131,27 @@ ps_pdwrite (struct ps_prochandle *ph, psaddr_t addr,
   return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1);
 }
 
+/* Get a regcache for LWPID using its inferior's "main" architecture,
+   which is the register set libthread_db expects to be using.  In
+   multi-arch debugging scenarios, the thread's architecture may
+   differ from the inferior's "main" architecture.  */
+
+static struct regcache *
+get_ps_regcache (struct ps_prochandle *ph, lwpid_t lwpid)
+{
+  inferior *inf = ph->thread->inf;
+  return get_thread_arch_regcache (inf->process_target (),
+                                  ptid_t (inf->pid, lwpid),
+                                  inf->gdbarch);
+}
+
 /* Get the general registers of LWP LWPID within the target process PH
    and store them in GREGSET.  */
 
 ps_err_e
 ps_lgetregs (struct ps_prochandle *ph, lwpid_t lwpid, prgregset_t gregset)
 {
-  ptid_t ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
-  struct regcache *regcache
-    = get_thread_arch_regcache (ptid, target_gdbarch ());
+  struct regcache *regcache = get_ps_regcache (ph, lwpid);
 
   target_fetch_registers (regcache, -1);
   fill_gregset (regcache, (gdb_gregset_t *) gregset, -1);
@@ -147,9 +165,7 @@ ps_lgetregs (struct ps_prochandle *ph, lwpid_t lwpid, prgregset_t gregset)
 ps_err_e
 ps_lsetregs (struct ps_prochandle *ph, lwpid_t lwpid, const prgregset_t gregset)
 {
-  ptid_t ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
-  struct regcache *regcache
-    = get_thread_arch_regcache (ptid, target_gdbarch ());
+  struct regcache *regcache = get_ps_regcache (ph, lwpid);
 
   supply_gregset (regcache, (const gdb_gregset_t *) gregset);
   target_store_registers (regcache, -1);
@@ -161,11 +177,10 @@ ps_lsetregs (struct ps_prochandle *ph, lwpid_t lwpid, const prgregset_t gregset)
    process PH and store them in FPREGSET.  */
 
 ps_err_e
-ps_lgetfpregs (struct ps_prochandle *ph, lwpid_t lwpid, gdb_prfpregset_t *fpregset)
+ps_lgetfpregs (struct ps_prochandle *ph, lwpid_t lwpid,
+              prfpregset_t *fpregset)
 {
-  ptid_t ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
-  struct regcache *regcache
-    = get_thread_arch_regcache (ptid, target_gdbarch ());
+  struct regcache *regcache = get_ps_regcache (ph, lwpid);
 
   target_fetch_registers (regcache, -1);
   fill_fpregset (regcache, (gdb_fpregset_t *) fpregset, -1);
@@ -178,11 +193,9 @@ ps_lgetfpregs (struct ps_prochandle *ph, lwpid_t lwpid, gdb_prfpregset_t *fpregs
 
 ps_err_e
 ps_lsetfpregs (struct ps_prochandle *ph, lwpid_t lwpid,
-              const gdb_prfpregset_t *fpregset)
+              const prfpregset_t *fpregset)
 {
-  ptid_t ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
-  struct regcache *regcache
-    = get_thread_arch_regcache (ptid, target_gdbarch ());
+  struct regcache *regcache = get_ps_regcache (ph, lwpid);
 
   supply_fpregset (regcache, (const gdb_fpregset_t *) fpregset);
   target_store_registers (regcache, -1);
@@ -196,11 +209,12 @@ ps_lsetfpregs (struct ps_prochandle *ph, lwpid_t lwpid,
 pid_t
 ps_getpid (struct ps_prochandle *ph)
 {
-  return ptid_get_pid (ph->ptid);
+  return ph->thread->ptid.pid ();
 }
 
+void _initialize_proc_service ();
 void
-_initialize_proc_service (void)
+_initialize_proc_service ()
 {
   /* This function solely exists to make sure this module is linked
      into the final binary.  */