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[Morello] Teach gdb about additional CHERI auxv entries

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CHERI/Morello defines some new auxv entries.  Make sure gdb understands
their type, even though gdb doesn't know how to display the capabilities
themselves.
This commit is contained in:
Luis Machado
2023-08-11 09:45:44 +01:00
parent e4c78b3b86
commit 690199d5d4
2 changed files with 35 additions and 0 deletions
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22
gdb/auxv.c
View File

@@ -540,6 +540,28 @@ default_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file,
AUXV_FORMAT_HEX);
TAG (AT_SUN_CAP_HW2, _("Machine-dependent CPU capability hints 2"),
AUXV_FORMAT_HEX);
/* CHERI-specific auxv entries. */
TAG (AT_CHERI_EXEC_RW_CAP,
_("The executable's RW region capability, if it exists"),
AUXV_FORMAT_HEX);
TAG (AT_CHERI_EXEC_RX_CAP, _("The executable's RX capability"),
AUXV_FORMAT_HEX);
TAG (AT_CHERI_INTERP_RW_CAP,
_("The interpreter's RW region capability, if it exists"),
AUXV_FORMAT_HEX);
TAG (AT_CHERI_INTERP_RX_CAP, _("The interpreter's RX region capability"),
AUXV_FORMAT_HEX);
TAG (AT_CHERI_STACK_CAP, _("The stack capability"), AUXV_FORMAT_HEX);
TAG (AT_CHERI_SEAL_CAP, _("The root sealing capability"),
AUXV_FORMAT_HEX);
TAG (AT_CHERI_CID_CAP, _("The root CID capability"), AUXV_FORMAT_HEX);
TAG (AT_ARGC, _("The number of initial arguments"), AUXV_FORMAT_DEC);
TAG (AT_ARGV, _("Capability to the initial arguments"), AUXV_FORMAT_HEX);
TAG (AT_ENVC, _("The number of initial environment variable entries"),
AUXV_FORMAT_DEC);
TAG (AT_ENVP, _("Capability to the initial environment variables"),
AUXV_FORMAT_HEX);
}
fprint_auxv_entry (file, name, description, format, type, val);

13
include/elf/common.h
View File

@@ -1325,4 +1325,17 @@
#define AT_SUN_BRAND_AUX3 2022
#define AT_SUN_CAP_HW2 2023 /* Extension of AT_SUN_CAP_HW1. */
/* CHERI auxv types. */
#define AT_CHERI_EXEC_RW_CAP 60
#define AT_CHERI_EXEC_RX_CAP 61
#define AT_CHERI_INTERP_RW_CAP 62
#define AT_CHERI_INTERP_RX_CAP 63
#define AT_CHERI_STACK_CAP 64
#define AT_CHERI_SEAL_CAP 65
#define AT_CHERI_CID_CAP 66
#define AT_ARGC 80
#define AT_ARGV 81
#define AT_ENVC 82
#define AT_ENVP 83
#endif /* _ELF_COMMON_H */