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Support AT_USRSTACKBASE and AT_USRSTACKLIM.

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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'.
This commit is contained in:
John Baldwin
2022-09-23 15:36:10 -07:00
parent eb668e5003
commit 4f60f82104
2 changed files with 4 additions and 0 deletions
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2
gdb/fbsd-tdep.c
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@ -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 (PS_STRINGS, _("Pointer to ps_strings"), AUXV_FORMAT_HEX);
TAG (FXRNG, _("Pointer to root RNG seed version"), AUXV_FORMAT_HEX); TAG (FXRNG, _("Pointer to root RNG seed version"), AUXV_FORMAT_HEX);
TAG (KPRELOAD, _("Base address of vDSO"), 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); fprint_auxv_entry (file, name, description, format, type, val);

2
include/elf/common.h
View File

@ -1405,6 +1405,8 @@
#define AT_FREEBSD_PS_STRINGS 32 /* struct ps_strings. */ #define AT_FREEBSD_PS_STRINGS 32 /* struct ps_strings. */
#define AT_FREEBSD_FXRNG 33 /* Pointer to root RNG seed version. */ #define AT_FREEBSD_FXRNG 33 /* Pointer to root RNG seed version. */
#define AT_FREEBSD_KPRELOAD 34 /* Base of vdso. */ #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_UID 2000 /* Effective user ID. */
#define AT_SUN_RUID 2001 /* Real user ID. */ #define AT_SUN_RUID 2001 /* Real user ID. */