gdb: add target_ops::supports_displaced_step

[deliverable/binutils-gdb.git] / gdb / go32-nat.c

diff --git a/gdb/go32-nat.c b/gdb/go32-nat.c
index 6a58565fef1c8717a0e0eba9b167a48ba989b66f..881decf078904c6eee60b180d455249159e573d4 100644 (file)
--- a/gdb/go32-nat.c
+++ b/gdb/go32-nat.c
@@ -1,5 +1,5 @@
 /* Native debugging support for Intel x86 running DJGPP.
-   Copyright (C) 1997-2019 Free Software Foundation, Inc.
+   Copyright (C) 1997-2020 Free Software Foundation, Inc.
    Written by Robert Hoehne.
 
    This file is part of GDB.
@@ -507,7 +507,8 @@ go32_nat_target::wait (ptid_t ptid, struct target_waitstatus *status,
     }
 
   getcwd (child_cwd, sizeof (child_cwd)); /* in case it has changed */
-  chdir (current_directory);
+  if (current_directory != NULL)
+    chdir (current_directory);
 
   if (a_tss.tss_irqn == 0x21)
     {
@@ -1162,6 +1163,7 @@ go32_sysinfo (const char *arg, int from_tty)
       unsigned brand_idx;
       int intel_p = strcmp (cpuid_vendor, "GenuineIntel") == 0;
       int amd_p = strcmp (cpuid_vendor, "AuthenticAMD") == 0;
+      int hygon_p = strcmp (cpuid_vendor, "HygonGenuine") == 0;
       unsigned cpu_family, cpu_model;
 
 #if 0
@@ -1261,12 +1263,12 @@ go32_sysinfo (const char *arg, int from_tty)
            }
        }
       xsnprintf (cpu_string, sizeof (cpu_string), "%s%s Model %d Stepping %d",
-                intel_p ? "Pentium" : (amd_p ? "AMD" : "ix86"),
+                intel_p ? "Pentium" : (amd_p ? "AMD" : (hygon_p ? "Hygon" : "ix86")),
                 cpu_brand, cpu_model, cpuid_eax & 0xf);
       printfi_filtered (31, "%s\n", cpu_string);
       if (((cpuid_edx & (6 | (0x0d << 23))) != 0)
          || ((cpuid_edx & 1) == 0)
-         || (amd_p && (cpuid_edx & (3 << 30)) != 0))
+         || ((amd_p || hygon_p) && (cpuid_edx & (3 << 30)) != 0))
        {
          puts_filtered ("CPU Features...................");
          /* We only list features which might be useful in the DPMI
@@ -1285,7 +1287,7 @@ go32_sysinfo (const char *arg, int from_tty)
            puts_filtered ("SSE ");
          if ((cpuid_edx & (1 << 26)) != 0)
            puts_filtered ("SSE2 ");
-         if (amd_p)
+         if (amd_p || hygon_p)
            {
              if ((cpuid_edx & (1 << 31)) != 0)
                puts_filtered ("3DNow! ");
@@ -1876,13 +1878,13 @@ get_cr3 (void)
   cr3 = _farnspeekl (taskbase + 0x1c) & ~0xfff;
   if (cr3 > 0xfffff)
     {
-#if 0  /* Not fullly supported yet.  */
+#if 0  /* Not fully supported yet.  */
       /* The Page Directory is in UMBs.  In that case, CWSDPMI puts
         the first Page Table right below the Page Directory.  Thus,
         the first Page Table's entry for its own address and the Page
         Directory entry for that Page Table will hold the same
         physical address.  The loop below searches the entire UMB
-        range of addresses for such an occurence.  */
+        range of addresses for such an occurrence.  */
       unsigned long addr, pte_idx;
 
       for (addr = 0xb0000, pte_idx = 0xb0;
@@ -2073,14 +2075,9 @@ go32_pte_for_address (const char *arg, int from_tty)
 
 static struct cmd_list_element *info_dos_cmdlist = NULL;
 
-static void
-go32_info_dos_command (const char *args, int from_tty)
-{
-  help_list (info_dos_cmdlist, "info dos ", class_info, gdb_stdout);
-}
-
+void _initialize_go32_nat ();
 void
-_initialize_go32_nat (void)
+_initialize_go32_nat ()
 {
   x86_dr_low.set_control = go32_set_dr7;
   x86_dr_low.set_addr = go32_set_dr;
@@ -2104,9 +2101,9 @@ _initialize_go32_nat (void)
   /* We are always processing GCC-compiled programs.  */
   processing_gcc_compilation = 2;
 
-  add_prefix_cmd ("dos", class_info, go32_info_dos_command, _("\
+  add_basic_prefix_cmd ("dos", class_info, _("\
 Print information specific to DJGPP (aka MS-DOS) debugging."),
-                 &info_dos_cmdlist, "info dos ", 0, &infolist);
+                       &info_dos_cmdlist, "info dos ", 0, &infolist);
 
   add_cmd ("sysinfo", class_info, go32_sysinfo, _("\
 Display information about the target system, including CPU, OS, DPMI, etc."),