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Rewrite Linux pledge() code so it can be a payload

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It's now possible to build our pledge() polyfill as a dynamic shared
object that can be injected into a glibc executable using LD_PRELOAD
This commit is contained in:
Justine Tunney 2022-08-08 11:41:08 -07:00
parent 7bd4179b9b
commit 0277d7d6e9
37 changed files with 1980 additions and 1600 deletions
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8
libc/sysv/consts.sh
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@ -417,14 +417,6 @@ syscon at AT_REMOVEDIR 0x0200 0x80 0x0800 8 0x800 0x0200 # faked
syscon at AT_EACCESS 0x0200 0x10 0x0100 1 0x100 0 # performs check using effective uid/gid; unnecessary nt
syscon at AT_EMPTY_PATH 0x1000 0 0 0 0 0 # linux 2.6.39+; see unlink, O_TMPFILE, etc.
# memfd_create() flags
#
# Unsupported flags are encoded as 0.
#
# group name GNU/Systemd XNU's Not UNIX! FreeBSD OpenBSD NetBSD The New Technology Commentary
syscon memfd MFD_CLOEXEC 1 0 0 0 0 0
syscon memfd MFD_ALLOW_SEALING 2 0 0 0 0 0
# utimensat() special values
#
# group name GNU/Systemd XNU's Not UNIX! FreeBSD OpenBSD NetBSD The New Technology Commentary