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| author | Matteo Gmür <matteo.gmuer1@ost.ch> | 2025-03-17 14:51:24 +0000 |
|---|---|---|
| committer | Matteo Gmür <matteo.gmuer1@ost.ch> | 2025-03-17 14:51:24 +0000 |
| commit | 3c01f820a064f3120a46aa3afdd9f88ce9e00db3 (patch) | |
| tree | ca35fdbe1172c1a5a9e1185385b1d49fe6401f47 /arch/x86_64/src/kernel/cpu | |
| parent | c56a8a74bc4e9662469db33a85c12586f202985a (diff) | |
| download | teachos-3c01f820a064f3120a46aa3afdd9f88ce9e00db3.tar.xz teachos-3c01f820a064f3120a46aa3afdd9f88ce9e00db3.zip | |
Debug and adjust load task register assembly call. WIP
Diffstat (limited to 'arch/x86_64/src/kernel/cpu')
| -rw-r--r-- | arch/x86_64/src/kernel/cpu/tr.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86_64/src/kernel/cpu/tr.cpp b/arch/x86_64/src/kernel/cpu/tr.cpp index d0e037f..e281189 100644 --- a/arch/x86_64/src/kernel/cpu/tr.cpp +++ b/arch/x86_64/src/kernel/cpu/tr.cpp @@ -11,6 +11,12 @@ namespace teachos::arch::kernel::cpu auto load_task_register(uint16_t gdt_offset) -> void { - asm volatile("ltr %[input]" : /* no output from call */ : [input] "r"(gdt_offset)); + // asm volatile("ltr %[input]" : /* no output from call */ : [input] "R"(gdt_offset)); + // https://www.scs.stanford.edu/05au-cs240c/lab/i386/s07_03.htm + asm volatile("mov %[input], %%ax\n" + "ltr %%ax\n" + : /* no output from call */ + : [input] "r"(gdt_offset) + : "ax"); } } // namespace teachos::arch::kernel::cpu |