The x86 thread code is all x86_32 specific. It needs to be updated to work with 64 bit. For now just throw an error when compiling. BUG=b:179699789 TEST=none Suggested-by: Furquan Shaikh <furquan@google.com> Signed-off-by: Raul E Rangel <rrangel@chromium.org> Change-Id: I96187ad84bdec40c6883748afa41e217bc389b79 Reviewed-on: https://review.coreboot.org/c/coreboot/+/56571 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
47 lines
962 B
ArmAsm
47 lines
962 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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#if ENV_X86_64
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#error COOP_MULTITASKING does not currently support x86_64
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#endif
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.code32
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.text
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/*
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* stack layout after pushad:
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* +------------+
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* | save stack | <-- esp + 0x28
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* +------------+
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* | new stack | <-- esp + 0x24
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* +------------+
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* | ret addr | <-- esp + 0x20
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* +------------+
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* | eax | <-- esp + 0x1c
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* +------------+
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* | ecx | <-- esp + 0x18
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* +------------+
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* | edx | <-- esp + 0x14
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* +------------+
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* | ebx | <-- esp + 0x10
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* +------------+
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* | orig esp | <-- esp + 0x0c
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* +------------+
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* | ebp | <-- esp + 0x08
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* +------------+
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* | esi | <-- esp + 0x04
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* +------------+
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* | edi | <-- esp + 0x00
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* +------------+
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*/
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.globl switch_to_thread
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switch_to_thread:
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pusha
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/* Save the current stack */
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movl 0x28(%esp), %ebx
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movl %esp, (%ebx)
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/* Switch to the new stack. */
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movl 0x24(%esp), %eax
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movl %eax, %esp
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popa
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ret
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