* Michael S. Tsirkin ([email protected]) wrote: > On Wed, Jun 28, 2017 at 08:00:21PM +0100, Dr. David Alan Gilbert (git) wrote: > > From: "Dr. David Alan Gilbert" <[email protected]> > > > > 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 <[email protected]> > > --- > > exec.c | 6 ++++++ > > include/exec/cpu-common.h | 1 + > > 2 files changed, 7 insertions(+) > > > > diff --git a/exec.c b/exec.c > > index 4e61226a16..a1499b9bee 100644 > > --- a/exec.c > > +++ b/exec.c > > @@ -2218,6 +2218,12 @@ static void *qemu_ram_ptr_length(RAMBlock > > *ram_block, ram_addr_t addr, > > return ramblock_ptr(block, addr); > > } > > > > +/* Return the offset of a hostpointer within a ramblock */ > > +ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host) > > +{ > > + return (uint8_t *)host - (uint8_t *)rb->host; > > +} > > + > > I'd also assert that it's within that block.
Done > > /* > > * Translates a host ptr back to a RAMBlock, a ram_addr and an offset > > * in that RAMBlock. > > diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h > > index 4af179b543..fa1ec22d66 100644 > > --- a/include/exec/cpu-common.h > > +++ b/include/exec/cpu-common.h > > @@ -66,6 +66,7 @@ ram_addr_t qemu_ram_addr_from_host(void *ptr); > > RAMBlock *qemu_ram_block_by_name(const char *name); > > RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, > > ram_addr_t *offset); > > +ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host); > > void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState > > *dev); > > void qemu_ram_unset_idstr(RAMBlock *block); > > const char *qemu_ram_get_idstr(RAMBlock *rb); > > -- > > 2.13.0 -- Dr. David Alan Gilbert / [email protected] / Manchester, UK
