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Diffstat (limited to 'arch/x86_64/src/context_switching')
-rw-r--r--arch/x86_64/src/context_switching/main.cpp27
1 files changed, 2 insertions, 25 deletions
diff --git a/arch/x86_64/src/context_switching/main.cpp b/arch/x86_64/src/context_switching/main.cpp
index 6c6ec1a..a112924 100644
--- a/arch/x86_64/src/context_switching/main.cpp
+++ b/arch/x86_64/src/context_switching/main.cpp
@@ -8,6 +8,7 @@
#include "arch/kernel/cpu/if.hpp"
#include "arch/kernel/cpu/segment_register.hpp"
#include "arch/kernel/cpu/tr.hpp"
+#include "arch/user/main.hpp"
#include "arch/video/vga/text.hpp"
namespace teachos::arch::context_switching
@@ -24,30 +25,6 @@ namespace teachos::arch::context_switching
4U, context_switching::interrupt_descriptor_table::segment_selector::REQUEST_LEVEL_USER};
auto reload_gdtr() -> void { kernel::cpu::call(KERNEL_CODE_POINTER); }
-
- auto user_mode_main() -> void
- {
- // TODO: Remove or replace this wall of text
- // RFLAGS is saved into R11, RIP of the next instruction into RCX
- // Required for SYSRETURN to know where to return too.
- // Additional state needs to be saved by calling convention:
-
- // Syscall Number: RAX, Return Value: RAX (0 indicating no error, and -1 indicating an error, use as a boolean)
- // Argument in this order (max 6. no argument on stack): RDI, RSI, RDX, R10, R8, R9
- // Not used registers: RBX, RSP, R12, R13, R14
-
- // Actual Source: https://man7.org/linux/man-pages/man2/syscall.2.html More cleare documentation:
- // https://sys.readthedocs.io/en/latest/doc/05_calling_system_calls.html
-
- const char syscall_message[68] = "Successfully entered user mode and wrote to VGA buffer via syscall!";
- auto error = syscall::syscall(syscall::WRITE, {reinterpret_cast<uint64_t>(&syscall_message)});
-
- if (!error)
- {
- video::vga::text::write("Successfully made a SYSCALL and returned with SYSRETQ!",
- video::vga::text::common_attributes::green_on_black);
- }
- }
} // namespace
auto initialize_descriptor_tables() -> descriptor_tables
@@ -76,7 +53,7 @@ namespace teachos::arch::context_switching
auto switch_to_user_mode() -> void
{
syscall::enable_syscall();
- switch_context(USER_DATA_SEGMENT_SELECTOR, USER_CODE_SEGMENT_SELECTOR, user_mode_main);
+ switch_context(USER_DATA_SEGMENT_SELECTOR, USER_CODE_SEGMENT_SELECTOR, user::main);
}
auto switch_context(interrupt_descriptor_table::segment_selector data_segment,