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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2024-12-22 01:56:49 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2024-12-22 01:56:49 +0100 |
| commit | 716e0cd088a73d9f31b1955949c3693c11210c59 (patch) | |
| tree | 2fb699bdea630f22c3f67fb96c60e0e85edba862 | |
| parent | 59d609a0d9e01ad79eee1225d72e304340990675 (diff) | |
| download | gnumach-716e0cd088a73d9f31b1955949c3693c11210c59.tar.gz gnumach-716e0cd088a73d9f31b1955949c3693c11210c59.tar.bz2 gnumach-716e0cd088a73d9f31b1955949c3693c11210c59.zip | |
cpuboot: Use x86 array indexing to make code more readable
| -rw-r--r-- | i386/i386/cpuboot.S | 21 |
1 files changed, 6 insertions, 15 deletions
diff --git a/i386/i386/cpuboot.S b/i386/i386/cpuboot.S index b9b6d632..6ba7aa42 100644 --- a/i386/i386/cpuboot.S +++ b/i386/i386/cpuboot.S @@ -44,6 +44,7 @@ apboot_gdt_top: .word 0 apboot_gdt_descr: .word (GDT_TABLE_M32 * 4) - 1 +apboot_gdt_descr_addr: .long apboot_gdt - KERNELBASE .align 16 apboot_gdt: @@ -200,27 +201,17 @@ apboot_jmp_offset: mul %ebp /* Patch only our own copy of gdt */ - movl $apboot_percpu_low, %ecx - addl %eax, %ecx - movw %bx, (%ecx) + movw %bx, apboot_percpu_low(%eax) shr $16, %ebx - addl $2, %ecx - movb %bl, (%ecx) + movb %bl, apboot_percpu_med(%eax) shr $8, %bx - addl $3, %ecx - movb %bl, (%ecx) + movb %bl, apboot_percpu_high(%eax) /* Patch only our own copy of gdt descriptor */ - movl $apboot_gdt_descr, %ecx - addl %eax, %ecx - movl %ecx, %edx - addl $2, %edx - movl (%edx), %ebx - addl %eax, %ebx - movl %ebx, (%edx) + addl %eax, apboot_gdt_descr_addr(%eax) /* Reload our copy of gdt */ - lgdtl (%ecx) + lgdtl apboot_gdt_descr(%eax) ljmpl $KERNEL_CS, $2f 2: |