Support several new ELF auxiliary vector types on FreeBSD.

FreeBSD's kernel recently added several ELF auxiliary vector entries
to describe the arguments passed to new executable images during
exec().  The AT_FREEBSD_ARGC and AT_FREEBSD_ARGV entries give the
length and address of the process argument array.  AT_FREEBSD_ENVC and
AT_FREEBSD_ENVV entries give the length and address of the initial
process environment.  AT_FREEBSD_PS_STRINGS gives the address of the
'struct ps_strings' object.

include/ChangeLog:

	* elf/common.h (AT_FREEBSD_ARGC, AT_FREEBSD_ARGV, AT_FREEBSD_ENVC)
	(AT_FREEBSD_ENVV, AT_FREEBSD_PS_STRINGS): Define.

gdb/ChangeLog:

	* fbsd-tdep.c (fbsd_print_auxv_entry): Handle AT_FREEBSD_ARGC,
	AT_FREEBSD_ARGV, AT_FREEBSD_ENVC, AT_FREEBSD_ENVV,
	AT_FREEBSD_PS_STRINGS.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index df9bc04c874ea3015b789035ec36a4c7a4467a98..40e22efd7eb6749574727dc13e75de2224981213 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2020-07-09  John Baldwin  <jhb@FreeBSD.org>
+
+       * fbsd-tdep.c (fbsd_print_auxv_entry): Handle AT_FREEBSD_ARGC,
+       AT_FREEBSD_ARGV, AT_FREEBSD_ENVC, AT_FREEBSD_ENVV,
+       AT_FREEBSD_PS_STRINGS.
+
 2020-07-08  Hannes Domani  <ssbssa@yahoo.de>
 
        * auto-load.c (auto_load_objfile_script_1): Convert drive part

diff --git a/gdb/fbsd-tdep.c b/gdb/fbsd-tdep.c
index acf787c706a3abd2e020ae6b559f4c3a9c12f278..557c5d3d737545b3b4506441771d7925bcbd29ed 100644 (file)
--- a/gdb/fbsd-tdep.c
+++ b/gdb/fbsd-tdep.c
@@ -1598,6 +1598,11 @@ fbsd_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file,
       TAG (HWCAP, _("Machine-dependent CPU capability hints"), AUXV_FORMAT_HEX);
       TAG (HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX);
       TAG (BSDFLAGS, _("ELF BSD flags"), AUXV_FORMAT_HEX);
+      TAG (ARGC, _("Argument count"), AUXV_FORMAT_DEC);
+      TAG (ARGV, _("Argument vector"), AUXV_FORMAT_HEX);
+      TAG (ENVC, _("Environment count"), AUXV_FORMAT_DEC);
+      TAG (ENVV, _("Environment vector"), AUXV_FORMAT_HEX);
+      TAG (PS_STRINGS, _("Pointer to ps_strings"), AUXV_FORMAT_HEX);
     }
 
   fprint_auxv_entry (file, name, description, format, type, val);

diff --git a/include/ChangeLog b/include/ChangeLog
index 1d7cafbe54d004830d2af4205580c9f301bb4442..49b9f038fa0c834b1bacc80f5942714feb3497aa 100644 (file)
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,8 @@
+2020-07-09  John Baldwin  <jhb@FreeBSD.org>
+
+       * elf/common.h (AT_FREEBSD_ARGC, AT_FREEBSD_ARGV, AT_FREEBSD_ENVC)
+       (AT_FREEBSD_ENVV, AT_FREEBSD_PS_STRINGS): Define.
+
 2020-07-09  Alan Modra  <amodra@gmail.com>
 
        * coff/powerpc.h: Delete.

diff --git a/include/elf/common.h b/include/elf/common.h
index 4d94c4fd5b34c3d59409950ae6141aa308695bf9..88dd1c9983bda8605a744f2d517041f751e2d8ba 100644 (file)
--- a/include/elf/common.h
+++ b/include/elf/common.h
@@ -1255,6 +1255,11 @@
 #define AT_FREEBSD_HWCAP        25      /* CPU feature flags. */
 #define AT_FREEBSD_HWCAP2       26      /* CPU feature flags 2. */
 #define AT_FREEBSD_BSDFLAGS     27      /* ELF BSD Flags. */
+#define AT_FREEBSD_ARGC         28      /* Argument count. */
+#define AT_FREEBSD_ARGV         29      /* Argument vector. */
+#define AT_FREEBSD_ENVC         30      /* Environment count. */
+#define AT_FREEBSD_ENVV         31      /* Environment vvector. */
+#define AT_FREEBSD_PS_STRINGS   32      /* struct ps_strings. */
 
 #define AT_SUN_UID      2000    /* Effective user ID.  */
 #define AT_SUN_RUID     2001    /* Real user ID.  */