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Kernel: Simplify the way we check for "serial_debug" on command line
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1 changed files with 1 additions and 12 deletions
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@ -362,24 +362,13 @@ void init_stage2()
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void setup_serial_debug()
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void setup_serial_debug()
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{
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{
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// this is only used one time, directly below here. we can't use this part
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// of libc at this point in the boot process, or we'd just pull strstr in
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// from <string.h>.
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auto bad_prefix_check = [](const char* str, const char* search) -> bool {
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while (*search)
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if (*search++ != *str++)
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return false;
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return true;
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};
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// serial_debug will output all the klog() and dbg() data to COM1 at
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// serial_debug will output all the klog() and dbg() data to COM1 at
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// 8-N-1 57600 baud. this is particularly useful for debugging the boot
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// 8-N-1 57600 baud. this is particularly useful for debugging the boot
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// process on live hardware.
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// process on live hardware.
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//
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//
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// note: it must be the first option in the boot cmdline.
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// note: it must be the first option in the boot cmdline.
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u32 cmdline = low_physical_to_virtual(multiboot_info_ptr->cmdline);
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u32 cmdline = low_physical_to_virtual(multiboot_info_ptr->cmdline);
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if (cmdline && bad_prefix_check(reinterpret_cast<const char*>(cmdline), "serial_debug"))
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if (cmdline && StringView(reinterpret_cast<const char*>(cmdline)).starts_with("serial_debug"))
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set_serial_debug(true);
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set_serial_debug(true);
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}
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}
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