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Fix bugs with recent change

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This change makes further effort towards improving our poll()
implementation on the New Technology. The stdin worker didn't work out
so well for Python so it's not being used for now. System call tracing
with the --strace flag should now be less noisy now on Windows unless
you modify the strace.internal.h defines to turn on some optional ones
that are most useful for debugging the system call wrappers.
This commit is contained in:
Justine Tunney 2022-04-16 10:40:23 -07:00
parent 933411ba99
commit dc0ea6640e
127 changed files with 1354 additions and 866 deletions
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19
libc/sysv/systemfive.S
View file

@ -198,27 +198,36 @@ systemfive_xnu:
.init.start 300,_init_systemfive
push %rbx
push %rsi
mov (%rdi),%eax
// Detect the operating system.
mov (%rdi),%eax # __hostos
#if SupportsWindows() || SupportsXnu() || SupportsFreebsd()
// set by libc/ape.S for XNU
// set by libc/crt/crt.S for XNU/FreeBSD
// set by libc/nt/winmain.greg.c for New Technology
test %eax,%eax
jnz _init_systemfive_detected # os is already known
#endif
#if SupportsOpenbsd()
cmpq $0,(%r15) # OpenBSD has no auxv
jnz 0f
mov $OPENBSD,%al
jmp _init_systemfive_detected
0:
#endif
#if SupportsNetbsd()
xor %ecx,%ecx
0: cmpq $2014,(%r15,%rcx,8) # NetBSD AT_EXECFN
0: cmpq $2014,(%r15,%rcx,8) # NetBSD's AT_EXECFN
jne 1f
mov $NETBSD,%al
jmp _init_systemfive_detected
1: cmpq $0,(%r15,%rcx,8)
lea 2(%ecx),%ecx
jnz 0b
2:
#endif
test %eax,%eax
jnz 1f
mov $LINUX,%al
1: stosq #→ __hostos
_init_systemfive_detected:
stosq #→ __hostos
bsr %eax,%eax
mov $_init_systemfive_jmptab,%ebx
movzbl (%rbx,%rax),%eax