From 85d6a760f57e6f53c72cf8d15be20e3e4eaf4734 Mon Sep 17 00:00:00 2001 From: Jan Sommer Date: Sun, 31 May 2020 16:22:53 +0200 Subject: bsp/pc386: Update GDT to work for SMP Create a GS segment in the GDT for each processor for storing TLS. This makes the GDT in startAP.S obsolete as all processors now share the same GDT, which is passed to each AP at startup. The correct segment for each processor is calculated in cpu_asm.S. Update #3335 --- cpukit/score/cpu/i386/cpu_asm.S | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'cpukit/score/cpu/i386/cpu_asm.S') diff --git a/cpukit/score/cpu/i386/cpu_asm.S b/cpukit/score/cpu/i386/cpu_asm.S index 6b609ab4ce..9e1e848bbd 100644 --- a/cpukit/score/cpu/i386/cpu_asm.S +++ b/cpukit/score/cpu/i386/cpu_asm.S @@ -85,12 +85,13 @@ restore: movl REG_EBX(eax),ebx /* restore ebx */ movl REG_ESI(eax),esi /* restore source register */ movl REG_EDI(eax),edi /* restore destination register */ - movl REG_GS_0(eax), ecx /* restore gs segment */ + GET_CPU_ID ecx + movl REG_GS_0(eax), edx /* restore gs segment */ + movl edx, _Global_descriptor_table+24(,ecx,8) movl REG_GS_1(eax), edx - movl ecx, _Global_descriptor_table + 24 - movl edx, _Global_descriptor_table + 28 - movl $24, ecx - mov ecx, gs + movl edx, _Global_descriptor_table+28(,ecx,8) + leal 24(,ecx,8), edx + movl edx, gs ret /* -- cgit v1.2.3