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acrn-hypervisor/hypervisor/boot/include/reloc.h

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hv: add code to fixup ELF relocation sections For UEFI boot, currently EFI application loads hypervisor to the hard coded COMNFIG_RAM_START, which may cause it fail to boot if this address is not available in the target. This patch series resolve this issue by allocating memory for hypervisor at run time, and do relocation fixup if the allocated address is different from the base address that the hypervisor is built. The summary of the first patch [1/6] in this series: In x86_64 ELF, .rela sections hold information of symbols which must be relocated before being referenced. This patch adds code to fixup .rela sections with the relocated offset, also, it provides utilities to assist address fixup Signed-off-by: Zheng Gen <gen.zheng@intel.com> Signed-off-by: Zide Chen <zide.chen@intel.com> Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
2018-06-22 23:15:12 +08:00
/*
* Copyright (C) <2018> Intel Corporation
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef RELOCATE_H
#define RELOCATE_H
extern void _relocate(void);
extern uint64_t get_hv_image_delta(void);
extern uint64_t get_hv_image_base(void);
extern uint64_t trampoline_relo_addr(void *addr);
hv: fixup addresses in the c code for relocation - Trampoline code doesn't have the same relocation delta with HV, Need to manually patch them when referenced from HV - replace all references to CONFIG_RAM_START with the actual HV load address Signed-off-by: Zheng Gen <gen.zheng@intel.com> Signed-off-by: Zide Chen <zide.chen@intel.com> Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
2018-06-23 01:16:17 +08:00
extern uint64_t read_trampoline_sym(void *sym);
extern void write_trampoline_sym(void *sym, uint64_t val);
hv: add code to fixup ELF relocation sections For UEFI boot, currently EFI application loads hypervisor to the hard coded COMNFIG_RAM_START, which may cause it fail to boot if this address is not available in the target. This patch series resolve this issue by allocating memory for hypervisor at run time, and do relocation fixup if the allocated address is different from the base address that the hypervisor is built. The summary of the first patch [1/6] in this series: In x86_64 ELF, .rela sections hold information of symbols which must be relocated before being referenced. This patch adds code to fixup .rela sections with the relocated offset, also, it provides utilities to assist address fixup Signed-off-by: Zheng Gen <gen.zheng@intel.com> Signed-off-by: Zide Chen <zide.chen@intel.com> Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
2018-06-22 23:15:12 +08:00
/* external symbols that are helpful for relocation */
extern uint8_t _DYNAMIC[];
extern uint8_t cpu_primary_start_32[];
extern uint8_t cpu_primary_start_64[];
extern uint8_t trampoline_spinlock_ptr[];
#endif /* RELOCATE_H */