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| author | Jon Santmyer <jon@jonsantmyer.com> | 2025-08-10 15:40:19 -0400 |
|---|---|---|
| committer | Jon Santmyer <jon@jonsantmyer.com> | 2025-08-10 15:40:19 -0400 |
| commit | c4f8ef91f18d854a4ede7a94e95b2eab898d6963 (patch) | |
| tree | c2772c4f380a684b6fa347f03b13f9476bf9500c /arch/x86_64/lock.s | |
| parent | b905869a35f062a4e5072f10bec3a2ba3db0e365 (diff) | |
| download | jove-kernel-c4f8ef91f18d854a4ede7a94e95b2eab898d6963.tar.gz jove-kernel-c4f8ef91f18d854a4ede7a94e95b2eab898d6963.tar.bz2 jove-kernel-c4f8ef91f18d854a4ede7a94e95b2eab898d6963.zip | |
working usermode objdir iteration
Diffstat (limited to 'arch/x86_64/lock.s')
| -rw-r--r-- | arch/x86_64/lock.s | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86_64/lock.s b/arch/x86_64/lock.s new file mode 100644 index 0000000..b63f078 --- /dev/null +++ b/arch/x86_64/lock.s @@ -0,0 +1,19 @@ +.global _mtx_acquire +.type _mtx_acquire @function +_mtx_acquire: + lock btsw $0, (%rdi) + jc .spin + ret +.spin: + pause + testb $1, (%rdi) + jnz .spin + jmp _mtx_acquire +.size _mtx_acquire, . - _mtx_acquire + +.global _mtx_release +.type _mtx_release @function +_mtx_release: + movb $0, (%rdi) + ret +.size _mtx_release, . - _mtx_release |