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path: root/scripts/get_source_date_epoch.sh
blob: 84ba4454543982716cc7f488840975ae832da104 (plain)
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#!/usr/bin/env bash
export LANG=C
export LC_ALL=C
[ -n "$TOPDIR" ] && cd $TOPDIR

try_version() {
	[ -f version.date ] || return 1
	SOURCE_DATE_EPOCH="$(cat version.date)"
	[ -n "$SOURCE_DATE_EPOCH" ]
}

try_git() {
	[ -e .git ] || return 1
	SOURCE_DATE_EPOCH="$(git log -1 --format=format:%ct)"
	[ -n "$SOURCE_DATE_EPOCH" ]
}

try_hg() {
	[ -d .hg ] || return 1
	SOURCE_DATE_EPOCH="$(hg log --template '{date}' -l 1 | cut -d. -f1)"
	[ -n "$SOURCE_DATE_EPOCH" ]
}

try_mtime() {
	perl -e 'print((stat $ARGV[0])[9])' "$0"
	[ -n "$SOURCE_DATE_EPOCH" ]
}

try_version || try_git || try_hg || try_mtime || SOURCE_DATE_EPOCH=""
echo "$SOURCE_DATE_EPOCH"
<xen/mm.h> #ifdef CONFIG_DOMAIN_PAGE /* * Map a given page frame, returning the mapped virtual address. The page is * then accessible within the current VCPU until a corresponding unmap call. */ extern void *map_domain_page(unsigned long pfn); /* * Pass a VA within a page previously mapped in the context of the * currently-executing VCPU via a call to map_domain_pages(). */ extern void unmap_domain_page(void *va); /* * Similar to the above calls, except the mapping is accessible in all * address spaces (not just within the VCPU that created the mapping). Global * mappings can also be unmapped from any context. */ extern void *map_domain_page_global(unsigned long pfn); extern void unmap_domain_page_global(void *va); #define DMCACHE_ENTRY_VALID 1U #define DMCACHE_ENTRY_HELD 2U struct domain_mmap_cache { unsigned long pfn; void *va; unsigned int flags; }; static inline void domain_mmap_cache_init(struct domain_mmap_cache *cache) { ASSERT(cache != NULL); cache->flags = 0; cache->pfn = 0; cache->va = NULL; } static inline void * map_domain_page_with_cache(unsigned long pfn, struct domain_mmap_cache *cache) { ASSERT(cache != NULL); BUG_ON(cache->flags & DMCACHE_ENTRY_HELD); if ( likely(cache->flags & DMCACHE_ENTRY_VALID) ) { cache->flags |= DMCACHE_ENTRY_HELD; if ( likely(pfn == cache->pfn) ) goto done; unmap_domain_page(cache->va); } cache->pfn = pfn; cache->va = map_domain_page(pfn); cache->flags = DMCACHE_ENTRY_HELD | DMCACHE_ENTRY_VALID; done: return cache->va; } static inline void unmap_domain_page_with_cache(void *va, struct domain_mmap_cache *cache) { ASSERT(cache != NULL); cache->flags &= ~DMCACHE_ENTRY_HELD; } static inline void domain_mmap_cache_destroy(struct domain_mmap_cache *cache) { ASSERT(cache != NULL); BUG_ON(cache->flags & DMCACHE_ENTRY_HELD); if ( likely(cache->flags & DMCACHE_ENTRY_VALID) ) { unmap_domain_page(cache->va); cache->flags = 0; } } #else /* !CONFIG_DOMAIN_PAGE */ #define map_domain_page(pfn) maddr_to_virt((pfn)<<PAGE_SHIFT) #define unmap_domain_page(va) ((void)(va)) #define map_domain_page_global(pfn) maddr_to_virt((pfn)<<PAGE_SHIFT) #define unmap_domain_page_global(va) ((void)(va)) struct domain_mmap_cache { }; #define domain_mmap_cache_init(c) ((void)(c)) #define map_domain_page_with_cache(pfn,c) (map_domain_page(pfn)) #define unmap_domain_page_with_cache(va,c) ((void)(va)) #define domain_mmap_cache_destroy(c) ((void)(c)) #endif /* !CONFIG_DOMAIN_PAGE */ #endif /* __XEN_DOMAIN_PAGE_H__ */