mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-30 16:28:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Support futexes on FreeBSD

Browse source
This commit is contained in:
Justine Tunney 2022-10-02 11:56:27 -07:00
parent 795d295590
commit 7549a5755e
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
10 changed files with 81 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

21
libc/runtime/clone.c
View file

@ -112,7 +112,7 @@ WinThreadEntry(int rdi, // rcx
// since we didn't indirect this function through NT2SYSV() it's not
// safe to simply return, and as such, we just call ExitThread().
__imp_ExitThread(rc);
unreachable;
notpossible;
}
static textwindows int CloneWindows(int (*func)(void *, int), char *stk,
@ -192,7 +192,7 @@ XnuThreadMain(void *pthread, // rdi
: "=m"(*wt->ztid)
: "a"(0x2000000 | 361), "D"(0), "S"(0), "d"(0)
: "rcx", "r10", "r11", "memory");
unreachable;
notpossible;
}
static int CloneXnu(int (*fn)(void *), char *stk, size_t stksz, int flags,
@ -239,12 +239,15 @@ static wontreturn void FreebsdThreadMain(void *p) {
wt->func(wt->arg, wt->tid);
// we no longer use the stack after this point
// void thr_exit(%rdi = long *state);
asm volatile("movl\t$0,%0\n\t" // *wt->ztid = 0
"syscall" // thr_exit()
asm volatile("movl\t$0,%0\n\t" // *wt->ztid = 0
"syscall\n\t" // _umtx_op()
"movl\t$431,%%eax\n\t" // thr_exit()
"xor\t%%edi,%%edi\n\t"
"syscall"
: "=m"(*wt->ztid)
: "a"(431), "D"(0)
: "rcx", "r11", "memory");
unreachable;
: "a"(454), "D"(wt->ztid), "S"(UMTX_OP_WAKE)
: "rcx", "r8", "r9", "r10", "r11", "memory");
notpossible;
}
static int CloneFreebsd(int (*func)(void *, int), char *stk, size_t stksz,
@ -318,7 +321,7 @@ noasan static wontreturn void OpenbsdThreadMain(void *p) {
: "a"(83), "m"(oldrsp), "D"(wt->ztid), "S"(FUTEX_WAKE),
"d"(INT_MAX)
: "rcx", "r11", "memory");
unreachable;
notpossible;
}
static int CloneOpenbsd(int (*func)(void *, int), char *stk, size_t stksz,
@ -372,7 +375,7 @@ static wontreturn void NetbsdThreadMain(void *arg, // rdi
: "=a"(ax), "=d"(dx), "=m"(*ztid)
: "0"(310)
: "rcx", "r11", "memory");
unreachable;
notpossible;
}
static int CloneNetbsd(int (*func)(void *, int), char *stk, size_t stksz,