From fbfc078e9f44c1c1e95c9c484f1d5650bcf631b7 Mon Sep 17 00:00:00 2001 From: Benji Dial Date: Sat, 27 Jul 2024 16:57:39 -0400 Subject: lots and lots of userspace stuff --- euler/source/syscall.asm | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 euler/source/syscall.asm (limited to 'euler/source/syscall.asm') diff --git a/euler/source/syscall.asm b/euler/source/syscall.asm new file mode 100644 index 0000000..d4515bb --- /dev/null +++ b/euler/source/syscall.asm @@ -0,0 +1,32 @@ +bits 64 + +section .text + +global __euler_do_syscall +__euler_do_syscall: + + push rdi + push rsi + push rdx + push rcx + + mov rax, qword [rdi] + mov rdi, qword [rsi] + mov rsi, qword [rdx] + mov rdx, qword [rcx] + + syscall + + pop rcx + mov qword [rcx], rdx + + pop rdx + mov qword [rdx], rsi + + pop rsi + mov qword [rsi], rdi + + pop rdi + mov qword [rdi], rax + + ret -- cgit v1.2.3