Looking for any more documentation on FSKit - https://developer.apple.com/documentation/fskit?language=objc
I don't see any examples or sessions on it, but it looks fascinating. Attempted to try to put something together and immediately ran into failed at lookup with error 159 - Sandbox restriction
dmaclach
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We have a KEXT that lists an address of 0 when we run kmutil showloaded on Apple Silicon (M1 & M2). The KEXT appears to work fine, but we are concerned that we have something misconfigured.
It shows a proper address on x86_64. Any thoughts would be appreciated.
macOS 13.4.
Cheers,
Dave
...
252 0 0xfffffe00078461f0 0x998 0x998 com.apple.driver.driverkit.serial (6.0.0) 447C62ED-B7E8-3B91-A3B1-19D2B50A20EC <46 5 4 3 1>
254 0 0xfffffe0007918e30 0x1710 0x1710 com.apple.filesystems.autofs (3.0) 7FF20081-54D5-329E-AA76-6BD3018C3167 <210 7 6 5 4 3 2 1>
256 0 0 0x1976 0x1976 com.google...
My understanding of sigaction is that my signal handler function should get a siginfo_t argument with the pid and uid of the process sending the signal.
#include <stdatomic.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
static atomic_int gTermParentPid = -1;
static void SigTermHandler(int signalValue, siginfo_t *info, void *uap) {
gTermParentPid = info->si_pid;
}
int main(int argc, const char * argv[]) {
struct sigaction handlerAction;
handlerAction.sa_sigaction = SigTermHandler;
handlerAction.sa_flags = SA_SIGINFO;
sigemptyset(&handlerAction.sa_mask);
if (sigaction(SIGTERM, &handlerAction, NULL) != 0) {
perror(NULL);
abort();
}
printf("pid: %d\n", getpid());
while (gTermParentPid == -1) {
sleep(1);
}
printf("ParentPid: %d\n", gTermParentPid);
}
so when I run the above program and then send it a kill from another shell I would expect it to log the pid of the shell I sent the kill from. In all cases though I am getting a pid and uid of 0. Is this expected? This seems to work fine on linux.
I tested this with a variety of other signals (SIGALRM, SIGINT) with the same results.
Not sure if Exception Handling was the right tag, but it was the closest I could find.
Filed as FB11850436 as well.
I'm attempting to use task_policy_get from a KEXT and am receiving the following error:
sudo /usr/bin/kmutil load -p myKext
Error Domain=KMErrorDomain Code=31 "Error occurred while building a collection:
1: One or more binaries has an error which prevented linking. See other errors.
2: Could not use 'myKext' because: Failed to bind '_task_policy_get' in 'myKext' (at offset 0x320 in __DATA_CONST, __got) as could not find a kext which exports this symbol"
I would expect that task_policy_get is a usable KPI?
11.3 Beta (20E5210c)
Mac mini (M1, 2020)
What I am actually wanting to do is to temporarily increase the qos values for a process. Maybe there is a better way of doing this?