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Support several new ELF auxiliary vector types on FreeBSD.

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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.
This commit is contained in:
John Baldwin 2020-07-09 09:39:05 -07:00
parent 939b95c77b
commit fc238d4a06
4 changed files with 21 additions and 0 deletions
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5
include/elf/common.h
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@ -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. */