cosmopolitan/libc/nt/kernel32/VirtualQueryEx.S

#include "libc/nt/codegen.h"
.imp	kernel32,__imp_VirtualQueryEx,VirtualQueryEx

	.text.windows
	.ftrace1
VirtualQueryEx:
	.ftrace2
#ifdef __x86_64__
	push	%rbp
	mov	%rsp,%rbp
	mov	__imp_VirtualQueryEx(%rip),%rax
	jmp	__sysv2nt
#elif defined(__aarch64__)
	mov	x0,#0
	ret
#endif
	.endfn	VirtualQueryEx,globl
	.previous
Make fork() go 30% faster This change makes fork() go nearly as fast as sys_fork() on UNIX. As for Windows this change shaves about 4-5ms off fork() + wait() latency. This is accomplished by using WriteProcessMemory() from the parent process to setup the address space of a suspended process; it is better than a pipe 2025-01-01 12:59:38 +00:00			`#include "libc/nt/codegen.h"`
			`.imp kernel32,__imp_VirtualQueryEx,VirtualQueryEx`

			`.text.windows`
			`.ftrace1`
			`VirtualQueryEx:`
			`.ftrace2`
			`#ifdef __x86_64__`
			`push %rbp`
			`mov %rsp,%rbp`
			`mov __imp_VirtualQueryEx(%rip),%rax`
			`jmp __sysv2nt`
			`#elif defined(__aarch64__)`
			`mov x0,#0`
			`ret`
			`#endif`
			`.endfn VirtualQueryEx,globl`
			`.previous`