43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
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#include "types.h"
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namespace virtmem
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{
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struct Mapping {
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u64 start_address, end_address;
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u64 memoffset, memsize;
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bool allow_writes;
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};
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// Platform specific vmemory API
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// To initialize (maybe) the vmem subsystem
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bool init(void **vmem_base_addr, void **sh4rcb_addr, size_t ramSize);
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// To reset the on-demand allocated pages.
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void reset_mem(void *ptr, unsigned size_bytes);
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// To handle a fault&allocate an ondemand page.
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void ondemand_page(void *address, unsigned size_bytes);
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// To create the mappings in the address space.
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void create_mappings(const Mapping *vmem_maps, unsigned nummaps);
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// Just tries to wipe as much as possible in the relevant area.
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void destroy();
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// Given a block of data in the .text section, prepares it for JIT action.
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// both code_area and size are page aligned. Returns success.
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bool prepare_jit_block(void *code_area, size_t size, void **code_area_rwx);
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// Same as above but uses two address spaces one with RX and RW protections.
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// Note: this function doesnt have to be implemented, it's a fallback for the above one.
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bool prepare_jit_block(void *code_area, size_t size, void **code_area_rw, ptrdiff_t *rx_offset);
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// This might not need an implementation (ie x86/64 cpus).
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void flush_cache(void *icache_start, void *icache_end, void *dcache_start, void *dcache_end);
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// Change a code buffer permissions from r-x to/from rw-
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void jit_set_exec(void* code, size_t size, bool enable);
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// Release a jit block previously allocated by prepare_jit_block
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void release_jit_block(void *code_area, size_t size);
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// Release a jit block previously allocated by prepare_jit_block (with dual RW and RX areas)
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void release_jit_block(void *code_area1, void *code_area2, size_t size);
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bool region_lock(void *start, std::size_t len);
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bool region_unlock(void *start, std::size_t len);
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bool region_set_exec(void *start, std::size_t len);
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} // namespace vmem
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