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a8d982e1f1
When compiled with FTRACE=1 U-boot will crash as %rdi is clobbered in board_init_f_alloc_reserve() and board_init_f_init_reserve() will memset the .text segment instead of the global_data struct. According to the System V AMD64 ABI %rdi is not preserved and the existing code only worked as board_init_f_alloc_reserve() was small enough to not use %rdi. Fix that by always passing the correct argument to board_init_f_init_reserve(). TEST=Can boot on qemu-q35 with FTRACE=1 enabled during build. Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
50 lines
1021 B
ArmAsm
50 lines
1021 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* 64-bit x86 Startup Code
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*
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* Copyright 2019 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <config.h>
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.section .text.start
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.code64
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.globl _start
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.type _start, @function
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_start:
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/* Set up memory using the existing stack */
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mov %rsp, %rdi
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call board_init_f_alloc_reserve
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mov %rax, %rsp
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mov %rsp, %rdi
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call board_init_f_init_reserve
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xor %rdi, %rdi
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call board_init_f
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call board_init_f_r
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/* Should not return here */
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jmp .
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.globl board_init_f_r_trampoline64
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.type board_init_f_r_trampoline64, @function
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board_init_f_r_trampoline64:
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/*
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* SDRAM has been initialised, U-Boot code has been copied into
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* RAM, BSS has been cleared and relocation adjustments have been
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* made. It is now time to jump into the in-RAM copy of U-Boot
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*
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* %eax = Address of top of new stack
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*/
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/* Stack grows down from top of SDRAM */
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movq %rsi, %rsp
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/* New gd is in rdi */
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/* Re-enter U-Boot by calling board_init_f_r() */
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call board_init_f_r
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