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Make improvements

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- Let OpenMP be usable via cosmocc
- Let libunwind be usable via cosmocc
- Make X86_HAVE(AVXVNNI) work correctly
- Avoid using MAP_GROWSDOWN on qemu-aarch64
- Introduce in6addr_any and in6addr_loopback
- Have thread stacks use MAP_GROWSDOWN by default
- Ask OpenMP to not use filesystem to manage threads
- Make NI_MAXHOST and NI_MAXSERV available w/o _GNU_SOURCE
This commit is contained in:
Justine Tunney 2024-01-29 15:45:10 -08:00
parent 5f8e9f14c1
commit 369aebfc48
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GPG key ID: BE714B4575D6E328
36 changed files with 416 additions and 80 deletions
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18
libc/calls/isqemu.c
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@ -24,11 +24,15 @@
/**
* Returns true if process is running under qemu-x86_64 or qemu-aarch64.
*/
int IsQemu(void) {
// qemu doesn't validate the advice argument
// we could also check if __getcwd(0, 0) raises efault
int e = errno;
int r = !sys_madvise(__executable_start, 16384, 127);
errno = e;
return r;
int IsQemuUser(void) {
static char rplus1;
if (!rplus1) {
// qemu doesn't validate the advice argument
// we could also check if __getcwd(0, 0) raises efault
int e = errno;
int r = !sys_madvise(__executable_start, 16384, 127);
errno = e;
rplus1 = r + 1;
}
return rplus1 - 1;
}