040362e379
. make exec() callers (i.e. vfs and rs) determine the memory layout by explicitly reserving regions using mmap() calls on behalf of the exec()ing process, i.e. handling all of the exec logic, thereby eliminating all special exec() knowledge from VM. . the new procedure is: clear the exec()ing process first, then call third-party mmap()s to reserve memory, then copy the executable file section contents in, all using callbacks tailored to the caller's way of starting an executable . i.e. no more explicit EXEC_NEWMEM-style calls in PM or VM as with rigid 2-section arguments . this naturally allows generalizing exec() by simply loading all ELF sections . drop/merge of lots of duplicate exec() code into libexec . not copying the code sections to vfs and into the executable again is a measurable performance improvement (about 3.3% faster for 'make' in src/servers/)
75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/* Prototypes and definitions for VM interface. */
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#ifndef _MINIX_VM_H
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#define _MINIX_VM_H
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#include <minix/types.h>
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#include <minix/endpoint.h>
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int vm_exit(endpoint_t ep);
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int vm_fork(endpoint_t ep, int slotno, endpoint_t *child_ep);
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int vm_brk(endpoint_t ep, char *newaddr);
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int vm_push_sig(endpoint_t ep, vir_bytes *old_sp);
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int vm_willexit(endpoint_t ep);
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int vm_adddma(endpoint_t proc_e, phys_bytes start, phys_bytes size);
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int vm_deldma(endpoint_t proc_e, phys_bytes start, phys_bytes size);
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int vm_getdma(endpoint_t *procp, phys_bytes *basep, phys_bytes *sizep);
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void *vm_map_phys(endpoint_t who, void *physaddr, size_t len);
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int vm_unmap_phys(endpoint_t who, void *vaddr, size_t len);
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int vm_notify_sig(endpoint_t ep, endpoint_t ipc_ep);
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int vm_set_priv(int procnr, void *buf);
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int vm_update(endpoint_t src_e, endpoint_t dst_e);
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int vm_memctl(endpoint_t ep, int req);
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int vm_query_exit(endpoint_t *endpt);
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int vm_watch_exit(endpoint_t ep);
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int vm_forgetblock(u64_t id);
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void vm_forgetblocks(void);
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int vm_yield_block_get_block(u64_t yieldid, u64_t getid, void *mem,
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vir_bytes len);
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/* Invalid ID with special meaning for the vm_yield_block_get_block
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* interface.
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*/
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#define VM_BLOCKID_NONE make64(ULONG_MAX, ULONG_MAX)
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/* VM kernel request types. */
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#define VMPTYPE_NONE 0
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#define VMPTYPE_CHECK 1
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#define VMPTYPE_COWMAP 2
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#define VMPTYPE_SMAP 3
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#define VMPTYPE_SUNMAP 4
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struct vm_stats_info {
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unsigned int vsi_pagesize; /* page size */
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unsigned long vsi_total; /* total number of memory pages */
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unsigned long vsi_free; /* number of free pages */
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unsigned long vsi_largest; /* largest number of consecutive free pages */
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unsigned long vsi_cached; /* number of pages cached for file systems */
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};
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struct vm_usage_info {
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vir_bytes vui_total; /* total amount of process memory */
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vir_bytes vui_common; /* part of memory mapped in more than once */
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vir_bytes vui_shared; /* shared (non-COW) part of common memory */
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};
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struct vm_region_info {
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int vri_seg; /* segment of virtual region (T or D) */
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vir_bytes vri_addr; /* base address of region */
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vir_bytes vri_length; /* length of region */
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int vri_prot; /* protection flags (PROT_) */
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int vri_flags; /* memory flags (subset of MAP_) */
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};
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#define MAX_VRI_COUNT 64 /* max. number of regions provided at once */
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int vm_info_stats(struct vm_stats_info *vfi);
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int vm_info_usage(endpoint_t who, struct vm_usage_info *vui);
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int vm_info_region(endpoint_t who, struct vm_region_info *vri, int
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count, vir_bytes *next);
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int vm_procctl(endpoint_t ep, int param);
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#endif /* _MINIX_VM_H */
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