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[rpcsx-os] Setup altstack per thread

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This commit is contained in:
DH 2023-07-13 15:53:05 +03:00
parent 01a98af098
commit 38f562181f
2 changed files with 19 additions and 17 deletions
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20
rpcsx-os/thread.cpp
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@ -1,4 +1,5 @@
#include "thread.hpp"
#include "backtrace.hpp"
#include "orbis/sys/sysentry.hpp"
#include <asm/prctl.h>
#include <csignal>
@ -7,7 +8,6 @@
#include <linux/prctl.h>
#include <string>
#include <sys/prctl.h>
#include <sys/ucontext.h>
#include <ucontext.h>
#include <unistd.h>
@ -19,6 +19,8 @@ handleSigSys(int sig, siginfo_t *info, void *ucontext) {
_writefsbase_u64(hostFs);
}
// rx::printStackTrace(reinterpret_cast<ucontext_t *>(ucontext),
// rx::thread::g_current, 1);
auto prevContext = std::exchange(rx::thread::g_current->context, ucontext);
orbis::syscall_entry(rx::thread::g_current);
rx::thread::g_current->context = prevContext;
@ -41,6 +43,22 @@ void rx::thread::deinitialize() {}
void rx::thread::invoke(orbis::Thread *thread) {
g_current = thread;
stack_t ss;
ss.ss_sp = malloc(SIGSTKSZ);
if (ss.ss_sp == NULL) {
perror("malloc");
exit(EXIT_FAILURE);
}
ss.ss_size = SIGSTKSZ;
ss.ss_flags = 0;
if (sigaltstack(&ss, NULL) == -1) {
perror("sigaltstack");
exit(EXIT_FAILURE);
}
sigset_t unblockSigs{};
sigset_t oldSigmask{};
sigaddset(&unblockSigs, SIGSYS);