/* * GRUB -- GRand Unified Bootloader * Copyright (C) 2009, 2010 Free Software Foundation, Inc. * * GRUB is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * GRUB is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GRUB. If not, see . */ #include #include #include #include #include #include #include #include GRUB_MOD_LICENSE ("GPLv3+"); struct grub_relocator { struct grub_relocator_chunk *chunks; grub_phys_addr_t postchunks; grub_phys_addr_t highestaddr; grub_phys_addr_t highestnonpostaddr; grub_size_t relocators_size; }; struct grub_relocator_subchunk { enum {CHUNK_TYPE_IN_REGION, CHUNK_TYPE_REGION_START, #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS CHUNK_TYPE_FIRMWARE, CHUNK_TYPE_LEFTOVER #endif } type; grub_mm_region_t reg; grub_phys_addr_t start; grub_size_t size; grub_size_t pre_size; struct grub_relocator_extra_block *extra; #if GRUB_RELOCATOR_HAVE_LEFTOVERS struct grub_relocator_fw_leftover *pre, *post; #endif }; struct grub_relocator_chunk { struct grub_relocator_chunk *next; grub_phys_addr_t src; void *srcv; grub_phys_addr_t target; grub_size_t size; struct grub_relocator_subchunk *subchunks; unsigned nsubchunks; }; struct grub_relocator_extra_block { struct grub_relocator_extra_block *next; struct grub_relocator_extra_block **prev; grub_phys_addr_t start; grub_phys_addr_t end; }; #if GRUB_RELOCATOR_HAVE_LEFTOVERS struct grub_relocator_fw_leftover { struct grub_relocator_fw_leftover *next; struct grub_relocator_fw_leftover **prev; grub_phys_addr_t quantstart; grub_uint8_t freebytes[GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT / 8]; }; static struct grub_relocator_fw_leftover *leftovers; #endif static struct grub_relocator_extra_block *extra_blocks; void * get_virtual_current_address (grub_relocator_chunk_t in) { return in->srcv; } grub_phys_addr_t get_physical_target_address (grub_relocator_chunk_t in) { return in->target; } struct grub_relocator * grub_relocator_new (void) { struct grub_relocator *ret; grub_cpu_relocator_init (); ret = grub_zalloc (sizeof (struct grub_relocator)); if (!ret) return NULL; ret->postchunks = ~(grub_phys_addr_t) 0; ret->relocators_size = grub_relocator_jumper_size; grub_dprintf ("relocator", "relocators_size=%lu\n", (unsigned long) ret->relocators_size); return ret; } #define DIGITSORT_BITS 8 #define DIGITSORT_MASK ((1 << DIGITSORT_BITS) - 1) #define BITS_IN_BYTE 8 #define max(a, b) (((a) > (b)) ? (a) : (b)) #define min(a, b) (((a) < (b)) ? (a) : (b)) static inline int is_start (int type) { return !(type & 1) && (type != COLLISION_START); } static void allocate_regstart (grub_phys_addr_t addr, grub_size_t size, grub_mm_region_t rb, grub_mm_region_t *regancestor, grub_mm_header_t hancestor) { grub_addr_t newreg_start, newreg_raw_start = (grub_addr_t) rb + (addr - grub_vtop (rb)) + size; grub_addr_t newreg_size, newreg_presize; grub_mm_header_t new_header; grub_mm_header_t hb = (grub_mm_header_t) (rb + 1); #ifdef DEBUG_RELOCATOR_NOMEM_DPRINTF grub_dprintf ("relocator", "ra = %p, rb = %p\n", regancestor, rb); #endif newreg_start = ALIGN_UP (newreg_raw_start, GRUB_MM_ALIGN); newreg_presize = newreg_start - newreg_raw_start; newreg_size = rb->size - (newreg_start - (grub_addr_t) rb); if ((hb->size << GRUB_MM_ALIGN_LOG2) >= newreg_start - (grub_addr_t) rb) { grub_mm_header_t newhnext = hb->next; grub_size_t newhsize = ((hb->size << GRUB_MM_ALIGN_LOG2) - (newreg_start - (grub_addr_t) rb)) >> GRUB_MM_ALIGN_LOG2; new_header = (void *) (newreg_start + sizeof (*rb)); if (newhnext == hb) newhnext = new_header; new_header->next = newhnext; new_header->size = newhsize; new_header->magic = GRUB_MM_FREE_MAGIC; } else { new_header = hb->next; if (new_header == hb) new_header = (void *) (newreg_start + sizeof (*rb)); } { struct grub_mm_header *newregfirst = rb->first; struct grub_mm_region *newregnext = rb->next; struct grub_mm_region *newreg = (void *) newreg_start; hancestor->next = new_header; if (newregfirst == hb) newregfirst = new_header; newreg->first = newregfirst; newreg->next = newregnext; newreg->pre_size = newreg_presize; newreg->size = newreg_size; *regancestor = newreg; { grub_mm_header_t h = newreg->first, hp = NULL; do { if ((void *) h < (void *) (newreg + 1)) grub_fatal ("Failed to adjust memory region: %p, %p, %p, %p, %p", newreg, newreg->first, h, hp, hb); #ifdef DEBUG_RELOCATOR_NOMEM_DPRINTF if ((void *) h == (void *) (newreg + 1)) grub_dprintf ("relocator", "Free start memory region: %p, %p, %p, %p, %p", newreg, newreg->first, h, hp, hb); #endif hp = h; h = h->next; } while (h != newreg->first); } } } static void allocate_inreg (grub_phys_addr_t paddr, grub_size_t size, grub_mm_header_t hb, grub_mm_header_t hbp, grub_mm_region_t rb) { struct grub_mm_header *foll = NULL; grub_addr_t vaddr = (grub_addr_t) hb + (paddr - grub_vtop (hb)); #ifdef DEBUG_RELOCATOR_NOMEM_DPRINTF grub_dprintf ("relocator", "inreg paddr = 0x%lx, size = %lu," " hb = %p, hbp = %p, rb = %p, vaddr = 0x%lx\n", (unsigned long) paddr, (unsigned long) size, hb, hbp, rb, (unsigned long) vaddr); #endif if (ALIGN_UP (vaddr + size, GRUB_MM_ALIGN) + GRUB_MM_ALIGN <= (grub_addr_t) (hb + hb->size)) { foll = (void *) ALIGN_UP (vaddr + size, GRUB_MM_ALIGN); foll->magic = GRUB_MM_FREE_MAGIC; foll->size = hb + hb->size - foll; #ifdef DEBUG_RELOCATOR_NOMEM_DPRINTF grub_dprintf ("relocator", "foll = %p, foll->size = %lu\n", foll, (unsigned long) foll->size); #endif } if (vaddr - (grub_addr_t) hb >= sizeof (*hb)) { hb->size = ((vaddr - (grub_addr_t) hb) >> GRUB_MM_ALIGN_LOG2); if (foll) { foll->next = hb; hbp->next = foll; if (rb->first == hb) { rb->first = foll; } } } else { if (foll) { foll->next = hb->next; } else foll = hb->next; hbp->next = foll; if (rb->first == hb) { rb->first = foll; } if (rb->first == hb) { rb->first = (void *) (rb + 1); } } } #if GRUB_RELOCATOR_HAVE_LEFTOVERS static void check_leftover (struct grub_relocator_fw_leftover *lo) { unsigned i; for (i = 0; i < sizeof (lo->freebytes); i++) if (lo->freebytes[i] != 0xff) return; grub_relocator_firmware_free_region (lo->quantstart, GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT); *lo->prev = lo->next; if (lo->next) lo->next->prev = lo->prev; } #endif static void free_subchunk (const struct grub_relocator_subchunk *subchu) { switch (subchu->type) { case CHUNK_TYPE_REGION_START: { grub_mm_region_t r1, r2, *rp; grub_mm_header_t h; grub_size_t pre_size; r1 = subchu->reg; r2 = (grub_mm_region_t) ALIGN_UP ((grub_addr_t) subchu->reg + (grub_vtop (subchu->reg) - subchu->start) + subchu->size, GRUB_MM_ALIGN); for (rp = &grub_mm_base; *rp && *rp != r2; rp = &((*rp)->next)); pre_size = subchu->pre_size; if (*rp) { grub_mm_header_t h2, *hp; r1->first = r2->first; r1->next = r2->next; r1->pre_size = pre_size; r1->size = r2->size + (r2 - r1) * sizeof (*r2); *rp = r1; h = (grub_mm_header_t) (r1 + 1); h->next = r2->first; h->magic = GRUB_MM_FREE_MAGIC; h->size = (r2 - r1 - 1); for (hp = &r2->first, h2 = *hp; h2->next != r2->first; hp = &(h2->next), h2 = *hp) if (h2 == (grub_mm_header_t) (r2 + 1)) break; if (h2 == (grub_mm_header_t) (r2 + 1)) { h->size = h2->size + (h2 - h); h->next = h2->next; *hp = h; if (hp == &r2->first) { for (h2 = r2->first; h2->next != r2->first; h2 = h2->next); h2->next = h; } } else { h2->next = h; } } else { r1->pre_size = pre_size; r1->size = (r2 - r1) * sizeof (*r2); /* Find where to insert this region. Put a smaller one before bigger ones, to prevent fragmentation. */ for (rp = &grub_mm_base; *rp; rp = &((*rp)->next)) if ((*rp)->size > r1->size) break; r1->next = *rp; *rp = r1->next; h = (grub_mm_header_t) (r1 + 1); r1->first = h; h->next = h; h->magic = GRUB_MM_FREE_MAGIC; h->size = (r2 - r1 - 1); } for (r2 = grub_mm_base; r2; r2 = r2->next) if ((grub_addr_t) r2 + r2->size == (grub_addr_t) r1) break; if (r2) { grub_mm_header_t hl2, hl, g; g = (grub_mm_header_t) ((grub_addr_t) r2 + r2->size); g->size = (grub_mm_header_t) r1 - g; r2->size += r1->size; for (hl = r2->first; hl->next != r2->first; hl = hl->next); for (hl2 = r1->first; hl2->next != r1->first; hl2 = hl2->next); hl2->next = r2->first; r2->first = r1->first; hl->next = r2->first; *rp = (*rp)->next; grub_free (g + 1); } break; } case CHUNK_TYPE_IN_REGION: { grub_mm_header_t h = (grub_mm_header_t) ALIGN_DOWN ((grub_addr_t) subchu->start, GRUB_MM_ALIGN); h->size = ((subchu->start + subchu->size + GRUB_MM_ALIGN - 1) / GRUB_MM_ALIGN) - (subchu->start / GRUB_MM_ALIGN) - 1; h->next = h; h->magic = GRUB_MM_ALLOC_MAGIC; grub_free (h + 1); break; } #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS case CHUNK_TYPE_FIRMWARE: case CHUNK_TYPE_LEFTOVER: { grub_addr_t fstart, fend; fstart = ALIGN_UP (subchu->start, GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT); fend = ALIGN_DOWN (subchu->start + subchu->size, GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT); if (fstart < fend) grub_relocator_firmware_free_region (fstart, fend - fstart); #if GRUB_RELOCATOR_HAVE_LEFTOVERS if (subchu->pre) { int off = subchu->start - fstart - GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT; grub_memset (subchu->pre->freebytes + off / 8 + 1, 0xff, sizeof (subchu->pre->freebytes) - off / 8 - 1); subchu->pre->freebytes[off / 8] |= ~((1 << (off % 8)) - 1); check_leftover (subchu->pre); } if (subchu->post) { int off = subchu->start + subchu->size - fend; grub_memset (subchu->pre->freebytes, 0xff, sizeof (subchu->pre->freebytes) - off / 8); subchu->pre->freebytes[off / 8] |= ((1 << (8 - (off % 8))) - 1); check_leftover (subchu->post); } #endif *subchu->extra->prev = subchu->extra->next; grub_free (subchu->extra); } break; #endif } } static int malloc_in_range (struct grub_relocator *rel, grub_addr_t start, grub_addr_t end, grub_addr_t align, grub_size_t size, struct grub_relocator_chunk *res, int from_low_priv, int collisioncheck) { grub_mm_region_t r, *ra, base_saved; struct grub_relocator_mmap_event *events = NULL, *eventt = NULL, *t; /* 128 is just in case of additional malloc (shouldn't happen). */ unsigned maxevents = 2 + 128; grub_mm_header_t p, pa; unsigned *counter; int nallocs = 0; unsigned j, N = 0; grub_addr_t target = 0; grub_dprintf ("relocator", "trying to allocate in 0x%lx-0x%lx aligned 0x%lx size 0x%lx\n", (unsigned long) start, (unsigned long) end, (unsigned long) align, (unsigned long) size); start = ALIGN_UP (start, align); end = ALIGN_DOWN (end - size, align) + size; if (end < start + size) return 0; /* We have to avoid any allocations when filling scanline events. Hence 2-stages. */ for (r = grub_mm_base; r; r = r->next) { p = r->first; do { if ((grub_addr_t) p < (grub_addr_t) (r + 1) || (grub_addr_t) p >= (grub_addr_t) (r + 1) + r->size) grub_fatal ("%d: out of range pointer: %p\n", __LINE__, p); maxevents += 2; p = p->next; } while (p != r->first); maxevents += 4; } if (collisioncheck && rel) { struct grub_relocator_chunk *chunk; for (chunk = rel->chunks; chunk; chunk = chunk->next) maxevents += 2; } #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS { struct grub_relocator_extra_block *cur; for (cur = extra_blocks; cur; cur = cur->next) maxevents += 2; } for (r = grub_mm_base; r; r = r->next) maxevents += 2; maxevents += grub_relocator_firmware_get_max_events (); #endif #if GRUB_RELOCATOR_HAVE_LEFTOVERS { struct grub_relocator_fw_leftover *cur; for (cur = leftovers; cur; cur = cur->next) { int l = 0; unsigned i; for (i = 0; i < GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT; i++) { if (l != ((cur->freebytes[i / 8] >> (i % 8)) & 1)) maxevents++; l = ((cur->freebytes[i / 8] >> (i % 8)) & 1); } if (l) maxevents++; } } #endif eventt = grub_malloc (maxevents * sizeof (events[0])); counter = grub_malloc ((DIGITSORT_MASK + 2) * sizeof (counter[0])); events = grub_malloc (maxevents * sizeof (events[0])); if (!events || !eventt || !counter) { grub_dprintf ("relocator", "events or counter allocation failed %d\n", maxevents); grub_free (events); grub_free (eventt); grub_free (counter); return 0; } if (collisioncheck && rel) { struct grub_relocator_chunk *chunk; for (chunk = rel->chunks; chunk; chunk = chunk->next) { events[N].type = COLLISION_START; events[N].pos = chunk->target; N++; events[N].type = COLLISION_END; events[N].pos = chunk->target + chunk->size; N++; } } #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS for (r = grub_mm_base; r; r = r->next) { #ifdef DEBUG_RELOCATOR_NOMEM_DPRINTF grub_dprintf ("relocator", "Blocking at 0x%lx-0x%lx\n", (unsigned long) r - r->pre_size, (unsigned long) (r + 1) + r->size); #endif events[N].type = FIRMWARE_BLOCK_START; events[N].pos = (grub_addr_t) r - r->pre_size; N++; events[N].type = FIRMWARE_BLOCK_END; events[N].pos = (grub_addr_t) (r + 1) + r->size; N++; } { struct grub_relocator_extra_block *cur; for (cur = extra_blocks; cur; cur = cur->next) { #ifdef DEBUG_RELOCATOR_NOMEM_DPRINTF grub_dprintf ("relocator", "Blocking at 0x%lx-0x%lx\n", (unsigned long) cur->start, (unsigned long) cur->end); #endif events[N].type = FIRMWARE_BLOCK_START; events[N].pos = cur->start; N++; events[N].type = FIRMWARE_BLOCK_END; events[N].pos = cur->end; N++; } } N += grub_relocator_firmware_fill_events (events + N); #if GRUB_RELOCATOR_HAVE_LEFTOVERS { struct grub_relocator_fw_leftover *cur; for (cur = leftovers; cur; cur = cur->next) { unsigned i; int l = 0; for (i = 0; i < GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT; i++) { if (l != ((cur->freebytes[i / 8] >> (i % 8)) & 1)) { events[N].type = l ? REG_LEFTOVER_END : REG_LEFTOVER_START; events[N].pos = cur->quantstart + i; events[N].leftover = cur; N++; } l = ((cur->freebytes[i / 8] >> (i % 8)) & 1); } if (l) { events[N].type = REG_LEFTOVER_END; events[N].pos = cur->quantstart + i; events[N].leftover = cur; N++; } } } #endif #endif /* No malloc from this point. */ base_saved = grub_mm_base; grub_mm_base = NULL; for (ra = &base_saved, r = *ra; r; ra = &(r->next), r = *ra) { pa = r->first; p = pa->next; if (p->magic == GRUB_MM_ALLOC_MAGIC) continue; do { if (p->magic != GRUB_MM_FREE_MAGIC) grub_fatal (__FILE__":%d free magic broken at %p (0x%x)\n", __LINE__, p, p->magic); if (p == (grub_mm_header_t) (r + 1)) { events[N].type = REG_BEG_START; events[N].pos = grub_vtop (r) - r->pre_size; events[N].reg = r; events[N].regancestor = ra; events[N].head = p; events[N].hancestor = pa; N++; events[N].type = REG_BEG_END; events[N].pos = grub_vtop (p + p->size) - sizeof (*r) - sizeof (struct grub_mm_header); N++; } else { events[N].type = IN_REG_START; events[N].pos = grub_vtop (p); events[N].head = p; events[N].hancestor = pa; events[N].reg = r; N++; events[N].type = IN_REG_END; events[N].pos = grub_vtop (p + p->size); N++; } pa = p; p = pa->next; } while (pa != r->first); } /* Put ending events after starting events. */ { int st = 0, e = N / 2; for (j = 0; j < N; j++) if (is_start (events[j].type) || events[j].type == COLLISION_START) eventt[st++] = events[j]; else eventt[e++] = events[j]; t = eventt; eventt = events; events = t; } { unsigned i; for (i = 0; i < (BITS_IN_BYTE * sizeof (grub_addr_t) / DIGITSORT_BITS); i++) { memset (counter, 0, (1 + (1 << DIGITSORT_BITS)) * sizeof (counter[0])); for (j = 0; j < N; j++) counter[((events[j].pos >> (DIGITSORT_BITS * i)) & DIGITSORT_MASK) + 1]++; for (j = 0; j <= DIGITSORT_MASK; j++) counter[j+1] += counter[j]; for (j = 0; j < N; j++) eventt[counter[((events[j].pos >> (DIGITSORT_BITS * i)) & DIGITSORT_MASK)]++] = events[j]; t = eventt; eventt = events; events = t; } } #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS retry: #endif /* Now events are nicely sorted. */ { int nstarted = 0, ncollisions = 0, nstartedfw = 0, nblockfw = 0; #if GRUB_RELOCATOR_HAVE_LEFTOVERS int nlefto = 0; #else const int nlefto = 0; #endif grub_addr_t starta = 0; for (j = from_low_priv ? 0 : N - 1; from_low_priv ? j < N : (j + 1); from_low_priv ? j++ : j--) { int isinsidebefore, isinsideafter; isinsidebefore = (!ncollisions && (nstarted || (((nlefto || nstartedfw) && !nblockfw)))); switch (events[j].type) { #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS case REG_FIRMWARE_START: nstartedfw++; break; case REG_FIRMWARE_END: nstartedfw--; break; case FIRMWARE_BLOCK_START: nblockfw++; break; case FIRMWARE_BLOCK_END: nblockfw--; break; #endif #if GRUB_RELOCATOR_HAVE_LEFTOVERS case REG_LEFTOVER_START: nlefto++; break; case REG_LEFTOVER_END: nlefto--; break; #endif case COLLISION_START: ncollisions++; break; case COLLISION_END: ncollisions--; break; case IN_REG_START: case REG_BEG_START: nstarted++; break; case IN_REG_END: case REG_BEG_END: nstarted--; break; } isinsideafter = (!ncollisions && (nstarted || ((nlefto || nstartedfw) && !nblockfw))); if (!isinsidebefore && isinsideafter) starta = from_low_priv ? ALIGN_UP (events[j].pos, align) : ALIGN_DOWN (events[j].pos - size, align) + size; if (isinsidebefore && !isinsideafter && from_low_priv) { target = starta; if (target < start) target = start; if (target + size <= end && target + size <= events[j].pos) /* Found an usable address. */ goto found; } if (isinsidebefore && !isinsideafter && !from_low_priv) { target = starta - size; if (target > end - size) target = end - size; if (target >= start && target >= events[j].pos) goto found; } } } grub_mm_base = base_saved; grub_free (events); grub_free (eventt); grub_free (counter); return 0; found: { int inreg = 0, regbeg = 0, ncol = 0; #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS int fwin = 0, fwb = 0, fwlefto = 0; #endif #if GRUB_RELOCATOR_HAVE_LEFTOVERS int last_lo = 0; #endif int last_start = 0; for (j = 0; j < N; j++) { int typepre; if (ncol) typepre = -1; else if (regbeg) typepre = CHUNK_TYPE_REGION_START; else if (inreg) typepre = CHUNK_TYPE_IN_REGION; #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS else if (fwin && !fwb) typepre = CHUNK_TYPE_FIRMWARE; else if (fwlefto && !fwb) typepre = CHUNK_TYPE_LEFTOVER; #endif else typepre = -1; if (j != 0 && events[j - 1].pos != events[j].pos) { grub_addr_t alloc_start, alloc_end; alloc_start = max (events[j - 1].pos, target); alloc_end = min (events[j].pos, target + size); if (alloc_end > alloc_start) { switch (typepre) { case CHUNK_TYPE_REGION_START: allocate_regstart (alloc_start, alloc_end - alloc_start, events[last_start].reg, events[last_start].regancestor, events[last_start].hancestor); /* TODO: maintain a reverse lookup tree for hancestor. */ { unsigned k; for (k = 0; k < N; k++) if (events[k].hancestor == events[last_start].head) events[k].hancestor = events[last_start].hancestor; } break; case CHUNK_TYPE_IN_REGION: allocate_inreg (alloc_start, alloc_end - alloc_start, events[last_start].head, events[last_start].hancestor, events[last_start].reg); { unsigned k; for (k = 0; k < N; k++) if (events[k].hancestor == events[last_start].head) events[k].hancestor = events[last_start].hancestor; } break; #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS case CHUNK_TYPE_FIRMWARE: { grub_addr_t fstart, fend; fstart = ALIGN_DOWN (alloc_start, GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT); fend = ALIGN_UP (alloc_end, GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT); #ifdef DEBUG_RELOCATOR_NOMEM_DPRINTF grub_dprintf ("relocator", "requesting %lx-%lx\n", (unsigned long) fstart, (unsigned long) fend); #endif /* The failure here can be very expensive. */ if (!grub_relocator_firmware_alloc_region (fstart, fend - fstart)) { if (from_low_priv) start = fend; else end = fstart; goto retry; } break; } #endif #if GRUB_RELOCATOR_HAVE_LEFTOVERS case CHUNK_TYPE_LEFTOVER: { unsigned offstart = alloc_start % GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT; unsigned offend = alloc_end % GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT; struct grub_relocator_fw_leftover *lo = events[last_lo].leftover; lo->freebytes[offstart / 8] &= ((1 << (8 - (start % 8))) - 1); grub_memset (lo->freebytes + (offstart + 7) / 8, 0, offend / 8 - (offstart + 7) / 8); lo->freebytes[offend / 8] &= ~((1 << (offend % 8)) - 1); } break; #endif } nallocs++; } } switch (events[j].type) { case REG_BEG_START: case IN_REG_START: if (events[j].type == REG_BEG_START && (grub_addr_t) (events[j].reg + 1) > target) regbeg++; else inreg++; last_start = j; break; case REG_BEG_END: case IN_REG_END: if (regbeg) regbeg--; else inreg--; break; #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS case REG_FIRMWARE_START: fwin++; break; case REG_FIRMWARE_END: fwin--; break; case FIRMWARE_BLOCK_START: fwb++; break; case FIRMWARE_BLOCK_END: fwb--; break; #endif #if GRUB_RELOCATOR_HAVE_LEFTOVERS case REG_LEFTOVER_START: fwlefto++; last_lo = j; break; case REG_LEFTOVER_END: fwlefto--; break; #endif case COLLISION_START: ncol++; break; case COLLISION_END: ncol--; break; } } } /* Malloc is available again. */ grub_mm_base = base_saved; grub_free (eventt); grub_free (counter); { int last_start = 0; int inreg = 0, regbeg = 0, ncol = 0; #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS int fwin = 0, fwlefto = 0, fwb = 0; #endif unsigned cural = 0; int oom = 0; res->subchunks = grub_malloc (sizeof (res->subchunks[0]) * nallocs); if (!res->subchunks) oom = 1; res->nsubchunks = nallocs; for (j = 0; j < N; j++) { int typepre; if (ncol) typepre = -1; else if (regbeg) typepre = CHUNK_TYPE_REGION_START; else if (inreg) typepre = CHUNK_TYPE_IN_REGION; #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS else if (fwin && !fwb) typepre = CHUNK_TYPE_FIRMWARE; else if (fwlefto && !fwb) typepre = CHUNK_TYPE_LEFTOVER; #endif else typepre = -1; if (j != 0 && events[j - 1].pos != events[j].pos) { grub_addr_t alloc_start, alloc_end; struct grub_relocator_subchunk tofree; struct grub_relocator_subchunk *curschu = &tofree; if (!oom) curschu = &res->subchunks[cural]; alloc_start = max (events[j - 1].pos, target); alloc_end = min (events[j].pos, target + size); if (alloc_end > alloc_start) { grub_dprintf ("relocator", "subchunk 0x%lx-0x%lx, %d\n", (unsigned long) alloc_start, (unsigned long) alloc_end, typepre); curschu->type = typepre; curschu->start = alloc_start; curschu->size = alloc_end - alloc_start; if (typepre == CHUNK_TYPE_REGION_START || typepre == CHUNK_TYPE_IN_REGION) { curschu->reg = events[last_start].reg; curschu->pre_size = alloc_start - events[j - 1].pos; } if (!oom && (typepre == CHUNK_TYPE_REGION_START #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS || typepre == CHUNK_TYPE_FIRMWARE #endif )) { struct grub_relocator_extra_block *ne; ne = grub_malloc (sizeof (*ne)); if (!ne) { oom = 1; grub_memcpy (&tofree, curschu, sizeof (tofree)); } else { ne->start = alloc_start; ne->end = alloc_end; ne->next = extra_blocks; ne->prev = &extra_blocks; if (extra_blocks) extra_blocks->prev = &(ne->next); extra_blocks = ne; curschu->extra = ne; } } #if GRUB_RELOCATOR_HAVE_LEFTOVERS if (!oom && typepre == CHUNK_TYPE_FIRMWARE) { grub_addr_t fstart, fend; fstart = ALIGN_DOWN (alloc_start, GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT); fend = ALIGN_UP (alloc_end, GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT); { struct grub_relocator_fw_leftover *lo1 = NULL; struct grub_relocator_fw_leftover *lo2 = NULL; if (fstart != alloc_start) lo1 = grub_malloc (sizeof (*lo1)); if (fend != alloc_end) lo2 = grub_malloc (sizeof (*lo2)); if ((!lo1 && fstart != alloc_start) || (!lo2 && fend != alloc_end)) { struct grub_relocator_extra_block *ne; grub_free (lo1); grub_free (lo2); lo1 = NULL; lo2 = NULL; oom = 1; grub_memcpy (&tofree, curschu, sizeof (tofree)); ne = extra_blocks; extra_blocks = extra_blocks->next; grub_free (ne); } if (lo1) { lo1->quantstart = fstart; grub_memset (lo1->freebytes, 0xff, (alloc_start - fstart) / 8); lo1->freebytes[(alloc_start - fstart) / 8] = (1 << ((alloc_start - fstart) % 8)) - 1; grub_memset (lo1->freebytes + ((alloc_start - fstart) / 8) + 1, 0, sizeof (lo1->freebytes) - (alloc_start - fstart) / 8 - 1); lo1->next = leftovers; lo1->prev = &leftovers; if (leftovers) leftovers->prev = &lo1->next; leftovers = lo1; } if (lo2) { lo2->quantstart = fend - GRUB_RELOCATOR_FIRMWARE_REQUESTS_QUANT; grub_memset (lo2->freebytes, 0, (alloc_end - lo2->quantstart) / 8); lo2->freebytes[(alloc_end - lo2->quantstart) / 8] = ~((1 << ((alloc_end - lo2->quantstart) % 8)) - 1); grub_memset (lo2->freebytes + ((alloc_end - lo2->quantstart) / 8) + 1, 0, sizeof (lo2->freebytes) - (alloc_end - lo2->quantstart) / 8 - 1); lo2->prev = &leftovers; if (leftovers) leftovers->prev = &lo2->next; lo2->next = leftovers; leftovers = lo2; } curschu->pre = lo1; curschu->post = lo2; } } if (typepre == CHUNK_TYPE_LEFTOVER) { curschu->pre = events[last_start].leftover; curschu->post = events[last_start].leftover; } #endif if (!oom) cural++; else free_subchunk (&tofree); } } switch (events[j].type) { case REG_BEG_START: case IN_REG_START: if (events[j].type == REG_BEG_START && (grub_addr_t) (events[j].reg + 1) > target) regbeg++; else inreg++; last_start = j; break; case REG_BEG_END: case IN_REG_END: inreg = regbeg = 0; break; #if GRUB_RELOCATOR_HAVE_FIRMWARE_REQUESTS case REG_FIRMWARE_START: fwin++; break; case REG_FIRMWARE_END: fwin--; break; case FIRMWARE_BLOCK_START: fwb++; break; case FIRMWARE_BLOCK_END: fwb--; break; #endif #if GRUB_RELOCATOR_HAVE_LEFTOVERS case REG_LEFTOVER_START: fwlefto++; break; case REG_LEFTOVER_END: fwlefto--; break; #endif case COLLISION_START: ncol++; break; case COLLISION_END: ncol--; break; } } if (oom) { unsigned i; for (i = 0; i < cural; i++) free_subchunk (&res->subchunks[i]); grub_free (res->subchunks); grub_dprintf ("relocator", "allocation failed with out-of-memory\n"); grub_free (events); return 0; } } res->src = target; res->size = size; grub_free (events); grub_dprintf ("relocator", "allocated: 0x%lx+0x%lx\n", (unsigned long) target, (unsigned long) size); return 1; } static void adjust_limits (struct grub_relocator *rel, grub_phys_addr_t *min_addr, grub_phys_addr_t *max_addr, grub_phys_addr_t in_min, grub_phys_addr_t in_max) { struct grub_relocator_chunk *chunk; *min_addr = 0; *max_addr = rel->postchunks; /* Keep chunks in memory in the same order as they'll be after relocation. */ for (chunk = rel->chunks; chunk; chunk = chunk->next) { if (chunk->target > in_max && chunk->src < *max_addr && chunk->src < rel->postchunks) *max_addr = chunk->src; if (chunk->target + chunk->size <= in_min && chunk->src + chunk->size > *min_addr && chunk->src < rel->postchunks) *min_addr = chunk->src + chunk->size; } } grub_err_t grub_relocator_alloc_chunk_addr (struct grub_relocator *rel, grub_relocator_chunk_t *out, grub_phys_addr_t target, grub_size_t size) { struct grub_relocator_chunk *chunk; grub_phys_addr_t min_addr = 0, max_addr; if (target > ~size) return grub_error (GRUB_ERR_BUG, "address is out of range"); adjust_limits (rel, &min_addr, &max_addr, target, target); for (chunk = rel->chunks; chunk; chunk = chunk->next) if ((chunk->target <= target && target < chunk->target + chunk->size) || (target <= chunk->target && chunk->target < target + size)) return grub_error (GRUB_ERR_BUG, "overlap detected"); chunk = grub_malloc (sizeof (struct grub_relocator_chunk)); if (!chunk) return grub_errno; grub_dprintf ("relocator", "min_addr = 0x%llx, max_addr = 0x%llx, target = 0x%llx\n", (unsigned long long) min_addr, (unsigned long long) max_addr, (unsigned long long) target); do { /* A trick to improve Linux allocation. */ #if defined (__i386__) || defined (__x86_64__) if (target < 0x100000) if (malloc_in_range (rel, rel->highestnonpostaddr, ~(grub_addr_t)0, 1, size, chunk, 0, 1)) { if (rel->postchunks > chunk->src) rel->postchunks = chunk->src; break; } #endif if (malloc_in_range (rel, target, max_addr, 1, size, chunk, 1, 0)) break; if (malloc_in_range (rel, min_addr, target, 1, size, chunk, 0, 0)) break; if (malloc_in_range (rel, rel->highestnonpostaddr, ~(grub_addr_t)0, 1, size, chunk, 0, 1)) { if (rel->postchunks > chunk->src) rel->postchunks = chunk->src; break; } grub_dprintf ("relocator", "not allocated\n"); grub_free (chunk); return grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory")); } while (0); grub_dprintf ("relocator", "allocated 0x%llx/0x%llx\n", (unsigned long long) chunk->src, (unsigned long long) target); if (rel->highestaddr < target + size) rel->highestaddr = target + size; if (rel->highestaddr < chunk->src + size) rel->highestaddr = chunk->src + size; if (chunk->src < rel->postchunks) { if (rel->highestnonpostaddr < target + size) rel->highestnonpostaddr = target + size; if (rel->highestnonpostaddr < chunk->src + size) rel->highestnonpostaddr = chunk->src + size; } grub_dprintf ("relocator", "relocators_size=%ld\n", (unsigned long) rel->relocators_size); if (chunk->src < target) rel->relocators_size += grub_relocator_backward_size; if (chunk->src > target) rel->relocators_size += grub_relocator_forward_size; grub_dprintf ("relocator", "relocators_size=%ld\n", (unsigned long) rel->relocators_size); chunk->target = target; chunk->size = size; chunk->next = rel->chunks; rel->chunks = chunk; grub_dprintf ("relocator", "cur = %p, next = %p\n", rel->chunks, rel->chunks->next); chunk->srcv = grub_map_memory (chunk->src, chunk->size); *out = chunk; #ifdef DEBUG_RELOCATOR grub_memset (chunk->srcv, 0xfa, chunk->size); grub_mm_check (); #endif return GRUB_ERR_NONE; } grub_err_t grub_relocator_alloc_chunk_align (struct grub_relocator *rel, grub_relocator_chunk_t *out, grub_phys_addr_t min_addr, grub_phys_addr_t max_addr, grub_size_t size, grub_size_t align, int preference, int avoid_efi_boot_services) { grub_addr_t min_addr2 = 0, max_addr2; struct grub_relocator_chunk *chunk; if (max_addr > ~size) max_addr = ~size; #ifdef GRUB_MACHINE_PCBIOS if (min_addr < 0x1000) min_addr = 0x1000; #endif grub_dprintf ("relocator", "chunks = %p\n", rel->chunks); chunk = grub_malloc (sizeof (struct grub_relocator_chunk)); if (!chunk) return grub_errno; if (malloc_in_range (rel, min_addr, max_addr, align, size, chunk, preference != GRUB_RELOCATOR_PREFERENCE_HIGH, 1)) { grub_dprintf ("relocator", "allocated 0x%llx/0x%llx\n", (unsigned long long) chunk->src, (unsigned long long) chunk->src); grub_dprintf ("relocator", "chunks = %p\n", rel->chunks); chunk->target = chunk->src; chunk->size = size; chunk->next = rel->chunks; rel->chunks = chunk; chunk->srcv = grub_map_memory (chunk->src, chunk->size); *out = chunk; return GRUB_ERR_NONE; } adjust_limits (rel, &min_addr2, &max_addr2, min_addr, max_addr); grub_dprintf ("relocator", "Adjusted limits from %lx-%lx to %lx-%lx\n", (unsigned long) min_addr, (unsigned long) max_addr, (unsigned long) min_addr2, (unsigned long) max_addr2); do { if (malloc_in_range (rel, min_addr2, max_addr2, align, size, chunk, 1, 1)) break; if (malloc_in_range (rel, rel->highestnonpostaddr, ~(grub_addr_t)0, 1, size, chunk, 0, 1)) { if (rel->postchunks > chunk->src) rel->postchunks = chunk->src; break; } return grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory")); } while (0); { int found = 0; auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_memory_type_t); int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t sz, grub_memory_type_t type) { grub_uint64_t candidate; if (type != GRUB_MEMORY_AVAILABLE) return 0; candidate = ALIGN_UP (addr, align); if (candidate < min_addr) candidate = ALIGN_UP (min_addr, align); if (candidate + size > addr + sz || candidate > ALIGN_DOWN (max_addr, align)) return 0; if (preference == GRUB_RELOCATOR_PREFERENCE_HIGH) candidate = ALIGN_DOWN (min (addr + sz - size, max_addr), align); if (!found || (preference == GRUB_RELOCATOR_PREFERENCE_HIGH && candidate > chunk->target)) chunk->target = candidate; if (!found || (preference == GRUB_RELOCATOR_PREFERENCE_LOW && candidate < chunk->target)) chunk->target = candidate; found = 1; return 0; } #ifdef GRUB_MACHINE_EFI grub_efi_mmap_iterate (hook, avoid_efi_boot_services); #elif defined (__powerpc__) (void) avoid_efi_boot_services; grub_machine_mmap_iterate (hook); #else (void) avoid_efi_boot_services; grub_mmap_iterate (hook); #endif if (!found) return grub_error (GRUB_ERR_BAD_OS, "couldn't find suitable memory target"); } while (1) { struct grub_relocator_chunk *chunk2; for (chunk2 = rel->chunks; chunk2; chunk2 = chunk2->next) if ((chunk2->target <= chunk->target && chunk->target < chunk2->target + chunk2->size) || (chunk2->target <= chunk->target + size && chunk->target + size < chunk2->target + chunk2->size) || (chunk->target <= chunk2->target && chunk2->target < chunk->target + size) || (chunk->target <= chunk2->target + chunk2->size && chunk2->target + chunk2->size < chunk->target + size)) { if (preference == GRUB_RELOCATOR_PREFERENCE_HIGH) chunk->target = ALIGN_DOWN (chunk2->target, align); else chunk->target = ALIGN_UP (chunk2->target + chunk2->size, align); break; } if (!chunk2) break; } grub_dprintf ("relocator", "relocators_size=%ld\n", (unsigned long) rel->relocators_size); if (chunk->src < chunk->target) rel->relocators_size += grub_relocator_backward_size; if (chunk->src > chunk->target) rel->relocators_size += grub_relocator_forward_size; grub_dprintf ("relocator", "relocators_size=%ld\n", (unsigned long) rel->relocators_size); chunk->size = size; chunk->next = rel->chunks; rel->chunks = chunk; grub_dprintf ("relocator", "cur = %p, next = %p\n", rel->chunks, rel->chunks->next); chunk->srcv = grub_map_memory (chunk->src, chunk->size); *out = chunk; #ifdef DEBUG_RELOCATOR grub_memset (chunk->srcv, 0xfa, chunk->size); grub_mm_check (); #endif return GRUB_ERR_NONE; } void grub_relocator_unload (struct grub_relocator *rel) { struct grub_relocator_chunk *chunk, *next; if (!rel) return; for (chunk = rel->chunks; chunk; chunk = next) { unsigned i; for (i = 0; i < chunk->nsubchunks; i++) free_subchunk (&chunk->subchunks[i]); grub_unmap_memory (chunk->srcv, chunk->size); next = chunk->next; grub_free (chunk->subchunks); grub_free (chunk); } grub_free (rel); } grub_err_t grub_relocator_prepare_relocs (struct grub_relocator *rel, grub_addr_t addr, void **relstart, grub_size_t *relsize) { grub_uint8_t *rels; grub_uint8_t *rels0; struct grub_relocator_chunk *sorted; grub_size_t nchunks = 0; unsigned j; struct grub_relocator_chunk movers_chunk; grub_dprintf ("relocator", "Preparing relocs (size=%ld)\n", (unsigned long) rel->relocators_size); if (!malloc_in_range (rel, 0, ~(grub_addr_t)0 - rel->relocators_size + 1, grub_relocator_align, rel->relocators_size, &movers_chunk, 1, 1)) return grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory")); movers_chunk.srcv = rels = rels0 = grub_map_memory (movers_chunk.src, movers_chunk.size); if (relsize) *relsize = rel->relocators_size; grub_dprintf ("relocator", "Relocs allocated at %p\n", movers_chunk.srcv); { unsigned i; grub_size_t count[257]; struct grub_relocator_chunk *from, *to, *tmp; grub_memset (count, 0, sizeof (count)); { struct grub_relocator_chunk *chunk; for (chunk = rel->chunks; chunk; chunk = chunk->next) { grub_dprintf ("relocator", "chunk %p->%p, 0x%lx\n", (void *) chunk->src, (void *) chunk->target, (unsigned long) chunk->size); nchunks++; count[(chunk->src & 0xff) + 1]++; } } from = grub_malloc (nchunks * sizeof (sorted[0])); to = grub_malloc (nchunks * sizeof (sorted[0])); if (!from || !to) { grub_free (from); grub_free (to); return grub_errno; } for (j = 0; j < 256; j++) count[j+1] += count[j]; { struct grub_relocator_chunk *chunk; for (chunk = rel->chunks; chunk; chunk = chunk->next) from[count[chunk->src & 0xff]++] = *chunk; } for (i = 1; i < GRUB_CPU_SIZEOF_VOID_P; i++) { grub_memset (count, 0, sizeof (count)); for (j = 0; j < nchunks; j++) count[((from[j].src >> (8 * i)) & 0xff) + 1]++; for (j = 0; j < 256; j++) count[j+1] += count[j]; for (j = 0; j < nchunks; j++) to[count[(from[j].src >> (8 * i)) & 0xff]++] = from[j]; tmp = to; to = from; from = tmp; } sorted = from; grub_free (to); } for (j = 0; j < nchunks; j++) { grub_dprintf ("relocator", "sorted chunk %p->%p, 0x%lx\n", (void *) sorted[j].src, (void *) sorted[j].target, (unsigned long) sorted[j].size); if (sorted[j].src < sorted[j].target) { grub_cpu_relocator_backward ((void *) rels, sorted[j].srcv, grub_map_memory (sorted[j].target, sorted[j].size), sorted[j].size); rels += grub_relocator_backward_size; } if (sorted[j].src > sorted[j].target) { grub_cpu_relocator_forward ((void *) rels, sorted[j].srcv, grub_map_memory (sorted[j].target, sorted[j].size), sorted[j].size); rels += grub_relocator_forward_size; } if (sorted[j].src == sorted[j].target) grub_arch_sync_caches (sorted[j].srcv, sorted[j].size); } grub_cpu_relocator_jumper ((void *) rels, (grub_addr_t) addr); *relstart = rels0; grub_free (sorted); return GRUB_ERR_NONE; } void grub_mm_check_real (char *file, int line) { grub_mm_region_t r; grub_mm_header_t p, pa; for (r = grub_mm_base; r; r = r->next) { pa = r->first; p = pa->next; if (p->magic == GRUB_MM_ALLOC_MAGIC) continue; do { if ((grub_addr_t) p < (grub_addr_t) (r + 1) || (grub_addr_t) p >= (grub_addr_t) (r + 1) + r->size) grub_fatal ("%s:%d: out of range pointer: %p\n", file, line, p); if (p->magic != GRUB_MM_FREE_MAGIC) grub_fatal ("%s:%d free magic broken at %p (0x%x)\n", file, line, p, p->magic); pa = p; p = pa->next; } while (pa != r->first); } }