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Add new sysctl, kern.supported_abis, containing the list of FreeBSD

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MACHINE_ARCH values whose binaries this kernel can run. This patch provides
a feature requested for implementing pkgng ABI identifiers in a robust
way.

The list is designed to indicate whether, say, an i386 package can be run on
the current system. If kern.supported_abis contains "i386", then the answer
is yes. Otherwise, the answer is no.

At the moment, this only supports MACHINE_ARCH and MACHINE_ARCH32. As we
gain support for more interesting combinations, this needs to become more
flexible, possibily through the sysent framework, along with the
hw.machine_arch emulation immediately preceding this code in kern_mib.c.

Reviewed by:	imp
MFC after:	3 days
This commit is contained in:
Nathan Whitehorn 2013-12-02 00:44:36 +00:00
parent 6d94bd07cc
commit 3cb6654d23
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=258819
1 changed files with 7 additions and 0 deletions
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7
sys/kern/kern_mib.c
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@ -261,6 +261,13 @@ sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD,
NULL, 0, sysctl_hw_machine_arch, "A", "System architecture");
SYSCTL_STRING(_kern, OID_AUTO, supported_abis, CTLFLAG_RD | CTLFLAG_MPSAFE,
#ifdef COMPAT_FREEBSD32
MACHINE_ARCH " " MACHINE_ARCH32, 0, "List of supported ABIs");
#else
MACHINE_ARCH, 0, "List of supported ABIs");
#endif
static int
sysctl_hostname(SYSCTL_HANDLER_ARGS)
{