qemu_ram_block_host_offset
Utility to give the offset of a host pointer within a RAMBlock (assuming we already know it's in that RAMBlock) Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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exec.c
10
exec.c
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@ -2297,6 +2297,16 @@ static void *qemu_ram_ptr_length(RAMBlock *ram_block, ram_addr_t addr,
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return ramblock_ptr(block, addr);
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return ramblock_ptr(block, addr);
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}
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}
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/* Return the offset of a hostpointer within a ramblock */
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ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host)
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{
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ram_addr_t res = (uint8_t *)host - (uint8_t *)rb->host;
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assert((uintptr_t)host >= (uintptr_t)rb->host);
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assert(res < rb->max_length);
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return res;
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}
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/*
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/*
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* Translates a host ptr back to a RAMBlock, a ram_addr and an offset
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* Translates a host ptr back to a RAMBlock, a ram_addr and an offset
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* in that RAMBlock.
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* in that RAMBlock.
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@ -68,6 +68,7 @@ ram_addr_t qemu_ram_addr_from_host(void *ptr);
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RAMBlock *qemu_ram_block_by_name(const char *name);
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RAMBlock *qemu_ram_block_by_name(const char *name);
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RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
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RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
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ram_addr_t *offset);
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ram_addr_t *offset);
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ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host);
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void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *dev);
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void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *dev);
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void qemu_ram_unset_idstr(RAMBlock *block);
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void qemu_ram_unset_idstr(RAMBlock *block);
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const char *qemu_ram_get_idstr(RAMBlock *rb);
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const char *qemu_ram_get_idstr(RAMBlock *rb);
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