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https://github.com/torvalds/linux
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45dd403da8
The EFI zboot code is not built as part of the kernel proper, like the ordinary EFI stub, but still needs access to symbols that are defined only internally in the kernel, and are left unexposed deliberately to avoid creating ABI inadvertently that we're stuck with later. So capture the kernel code size of the kernel image, and inject it as an ELF symbol into the object that contains the compressed payload, where it will be accessible to zboot code that needs it. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Mark Rutland <mark.rutland@arm.com>
115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Linker script variables to be set after section resolution, as
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* ld.lld does not like variables assigned before SECTIONS is processed.
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*/
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#ifndef __ARM64_KERNEL_IMAGE_VARS_H
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#define __ARM64_KERNEL_IMAGE_VARS_H
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#ifndef LINKER_SCRIPT
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#error This file should only be included in vmlinux.lds.S
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#endif
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PROVIDE(__efistub_primary_entry = primary_entry);
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/*
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* The EFI stub has its own symbol namespace prefixed by __efistub_, to
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* isolate it from the kernel proper. The following symbols are legally
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* accessed by the stub, so provide some aliases to make them accessible.
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* Only include data symbols here, or text symbols of functions that are
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* guaranteed to be safe when executed at another offset than they were
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* linked at. The routines below are all implemented in assembler in a
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* position independent manner
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*/
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PROVIDE(__efistub_caches_clean_inval_pou = __pi_caches_clean_inval_pou);
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PROVIDE(__efistub__text = _text);
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PROVIDE(__efistub__end = _end);
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PROVIDE(__efistub___inittext_end = __inittext_end);
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PROVIDE(__efistub__edata = _edata);
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PROVIDE(__efistub_screen_info = screen_info);
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PROVIDE(__efistub__ctype = _ctype);
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PROVIDE(__pi___memcpy = __pi_memcpy);
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PROVIDE(__pi___memmove = __pi_memmove);
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PROVIDE(__pi___memset = __pi_memset);
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#ifdef CONFIG_KVM
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/*
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* KVM nVHE code has its own symbol namespace prefixed with __kvm_nvhe_, to
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* separate it from the kernel proper. The following symbols are legally
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* accessed by it, therefore provide aliases to make them linkable.
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* Do not include symbols which may not be safely accessed under hypervisor
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* memory mappings.
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*/
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/* Alternative callbacks for init-time patching of nVHE hyp code. */
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KVM_NVHE_ALIAS(kvm_patch_vector_branch);
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KVM_NVHE_ALIAS(kvm_update_va_mask);
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KVM_NVHE_ALIAS(kvm_get_kimage_voffset);
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KVM_NVHE_ALIAS(kvm_compute_final_ctr_el0);
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KVM_NVHE_ALIAS(spectre_bhb_patch_loop_iter);
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KVM_NVHE_ALIAS(spectre_bhb_patch_loop_mitigation_enable);
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KVM_NVHE_ALIAS(spectre_bhb_patch_wa3);
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KVM_NVHE_ALIAS(spectre_bhb_patch_clearbhb);
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KVM_NVHE_ALIAS(alt_cb_patch_nops);
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/* Global kernel state accessed by nVHE hyp code. */
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KVM_NVHE_ALIAS(kvm_vgic_global_state);
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/* Kernel symbols used to call panic() from nVHE hyp code (via ERET). */
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KVM_NVHE_ALIAS(nvhe_hyp_panic_handler);
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/* Vectors installed by hyp-init on reset HVC. */
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KVM_NVHE_ALIAS(__hyp_stub_vectors);
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/* Static keys which are set if a vGIC trap should be handled in hyp. */
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KVM_NVHE_ALIAS(vgic_v2_cpuif_trap);
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KVM_NVHE_ALIAS(vgic_v3_cpuif_trap);
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#ifdef CONFIG_ARM64_PSEUDO_NMI
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/* Static key checked in GIC_PRIO_IRQOFF. */
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KVM_NVHE_ALIAS(gic_nonsecure_priorities);
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#endif
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/* EL2 exception handling */
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KVM_NVHE_ALIAS(__start___kvm_ex_table);
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KVM_NVHE_ALIAS(__stop___kvm_ex_table);
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/* PMU available static key */
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#ifdef CONFIG_HW_PERF_EVENTS
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KVM_NVHE_ALIAS(kvm_arm_pmu_available);
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#endif
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/* Position-independent library routines */
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KVM_NVHE_ALIAS_HYP(clear_page, __pi_clear_page);
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KVM_NVHE_ALIAS_HYP(copy_page, __pi_copy_page);
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KVM_NVHE_ALIAS_HYP(memcpy, __pi_memcpy);
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KVM_NVHE_ALIAS_HYP(memset, __pi_memset);
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#ifdef CONFIG_KASAN
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KVM_NVHE_ALIAS_HYP(__memcpy, __pi_memcpy);
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KVM_NVHE_ALIAS_HYP(__memset, __pi_memset);
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#endif
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/* Hyp memory sections */
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KVM_NVHE_ALIAS(__hyp_idmap_text_start);
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KVM_NVHE_ALIAS(__hyp_idmap_text_end);
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KVM_NVHE_ALIAS(__hyp_text_start);
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KVM_NVHE_ALIAS(__hyp_text_end);
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KVM_NVHE_ALIAS(__hyp_bss_start);
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KVM_NVHE_ALIAS(__hyp_bss_end);
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KVM_NVHE_ALIAS(__hyp_rodata_start);
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KVM_NVHE_ALIAS(__hyp_rodata_end);
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/* pKVM static key */
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KVM_NVHE_ALIAS(kvm_protected_mode_initialized);
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#endif /* CONFIG_KVM */
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#ifdef CONFIG_EFI_ZBOOT
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_kernel_codesize = ABSOLUTE(__inittext_end - _text);
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#endif
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#endif /* __ARM64_KERNEL_IMAGE_VARS_H */
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