From: John Baldwin <jhb@FreeBSD.org>
To: gdb-patches@sourceware.org, binutils@sourceware.org
Subject: [PATCH] Support AT_USRSTACKBASE and AT_USRSTACKLIM.
Date: Wed, 21 Sep 2022 10:36:46 -0700 [thread overview]
Message-ID: <20220921173646.7219-1-jhb@FreeBSD.org> (raw)
FreeBSD's kernel has recently added two new ELF auxiliary vector
entries to describe the location of the user stack for the initial
thread in a process.
This change displays the proper name and description of these entries
in 'info auxv'.
---
gdb/fbsd-tdep.c | 2 ++
include/elf/common.h | 2 ++
2 files changed, 4 insertions(+)
diff --git a/gdb/fbsd-tdep.c b/gdb/fbsd-tdep.c
index 40370100c0f..309777c55f2 100644
--- a/gdb/fbsd-tdep.c
+++ b/gdb/fbsd-tdep.c
@@ -1571,6 +1571,8 @@ fbsd_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file,
TAG (PS_STRINGS, _("Pointer to ps_strings"), AUXV_FORMAT_HEX);
TAG (FXRNG, _("Pointer to root RNG seed version"), AUXV_FORMAT_HEX);
TAG (KPRELOAD, _("Base address of vDSO"), AUXV_FORMAT_HEX);
+ TAG (USRSTACKBASE, _("Top of user stack"), AUXV_FORMAT_HEX);
+ TAG (USRSTACKLIM, _("Grow limit of user stack"), AUXV_FORMAT_HEX);
}
fprint_auxv_entry (file, name, description, format, type, val);
diff --git a/include/elf/common.h b/include/elf/common.h
index ebcd8f9e82c..287526d74ed 100644
--- a/include/elf/common.h
+++ b/include/elf/common.h
@@ -1405,6 +1405,8 @@
#define AT_FREEBSD_PS_STRINGS 32 /* struct ps_strings. */
#define AT_FREEBSD_FXRNG 33 /* Pointer to root RNG seed version. */
#define AT_FREEBSD_KPRELOAD 34 /* Base of vdso. */
+#define AT_FREEBSD_USRSTACKBASE 35 /* Top of user stack. */
+#define AT_FREEBSD_USRSTACKLIM 36 /* Grow limit of user stack. */
#define AT_SUN_UID 2000 /* Effective user ID. */
#define AT_SUN_RUID 2001 /* Real user ID. */
--
2.37.2
next reply other threads:[~2022-09-21 17:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-21 17:36 John Baldwin [this message]
2022-09-22 11:28 ` Nick Clifton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220921173646.7219-1-jhb@FreeBSD.org \
--to=jhb@freebsd.org \
--cc=binutils@sourceware.org \
--cc=gdb-patches@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).