diff options
Diffstat (limited to 'linux-user/mmap.c')
| -rw-r--r-- | linux-user/mmap.c | 48 |
1 files changed, 24 insertions, 24 deletions
diff --git a/linux-user/mmap.c b/linux-user/mmap.c index bfecb7a545..3eb930e7b0 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -1,6 +1,6 @@ /* * mmap support for qemu - * + * * Copyright (c) 2003 Fabrice Bellard * * This program is free software; you can redistribute it and/or modify @@ -52,7 +52,7 @@ int target_mprotect(target_ulong start, target_ulong len, int prot) return -EINVAL; if (len == 0) return 0; - + host_start = start & qemu_host_page_mask; host_end = HOST_PAGE_ALIGN(end); if (start > host_start) { @@ -77,13 +77,13 @@ int target_mprotect(target_ulong start, target_ulong len, int prot) for(addr = end; addr < host_end; addr += TARGET_PAGE_SIZE) { prot1 |= page_get_flags(addr); } - ret = mprotect(g2h(host_end - qemu_host_page_size), qemu_host_page_size, + ret = mprotect(g2h(host_end - qemu_host_page_size), qemu_host_page_size, prot1 & PAGE_BITS); if (ret != 0) return ret; host_end -= qemu_host_page_size; } - + /* handle the pages in the middle */ if (host_start < host_end) { ret = mprotect(g2h(host_start), host_end - host_start, prot); @@ -95,8 +95,8 @@ int target_mprotect(target_ulong start, target_ulong len, int prot) } /* map an incomplete host page */ -static int mmap_frag(target_ulong real_start, - target_ulong start, target_ulong end, +static int mmap_frag(target_ulong real_start, + target_ulong start, target_ulong end, int prot, int flags, int fd, target_ulong offset) { target_ulong real_end, ret, addr; @@ -112,10 +112,10 @@ static int mmap_frag(target_ulong real_start, if (addr < start || addr >= end) prot1 |= page_get_flags(addr); } - + if (prot1 == 0) { /* no page was there, so we allocate one */ - ret = (long)mmap(host_start, qemu_host_page_size, prot, + ret = (long)mmap(host_start, qemu_host_page_size, prot, flags | MAP_ANONYMOUS, -1, 0); if (ret == -1) return ret; @@ -134,10 +134,10 @@ static int mmap_frag(target_ulong real_start, /* adjust protection to be able to read */ if (!(prot1 & PROT_WRITE)) mprotect(host_start, qemu_host_page_size, prot1 | PROT_WRITE); - + /* read the corresponding file data */ pread(fd, g2h(start), end - start, offset); - + /* put final protection */ if (prot_new != (prot1 | PROT_WRITE)) mprotect(host_start, qemu_host_page_size, prot_new); @@ -151,7 +151,7 @@ static int mmap_frag(target_ulong real_start, } /* NOTE: all the constants are the HOST ones */ -long target_mmap(target_ulong start, target_ulong len, int prot, +long target_mmap(target_ulong start, target_ulong len, int prot, int flags, int fd, target_ulong offset) { target_ulong ret, end, real_start, real_end, retaddr, host_offset, host_len; @@ -167,7 +167,7 @@ long target_mmap(target_ulong start, target_ulong len, int prot, #ifdef DEBUG_MMAP { printf("mmap: start=0x%lx len=0x%lx prot=%c%c%c flags=", - start, len, + start, len, prot & PROT_READ ? 'r' : '-', prot & PROT_WRITE ? 'w' : '-', prot & PROT_EXEC ? 'x' : '-'); @@ -216,7 +216,7 @@ long target_mmap(target_ulong start, target_ulong len, int prot, /* ??? This needs fixing for remapping. */ abort(); host_len = HOST_PAGE_ALIGN(len) + qemu_host_page_size - TARGET_PAGE_SIZE; - real_start = (long)mmap(g2h(real_start), host_len, PROT_NONE, + real_start = (long)mmap(g2h(real_start), host_len, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (real_start == -1) return real_start; @@ -238,13 +238,13 @@ abort(); if (host_start == -1) return host_start; /* update start so that it points to the file position at 'offset' */ - if (!(flags & MAP_ANONYMOUS)) + if (!(flags & MAP_ANONYMOUS)) host_start += offset - host_offset; start = h2g(host_start); goto the_end1; } } - + if (start & ~TARGET_PAGE_MASK) { errno = EINVAL; return -1; @@ -263,8 +263,8 @@ abort(); errno = EINVAL; return -1; } - retaddr = target_mmap(start, len, prot | PROT_WRITE, - MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, + retaddr = target_mmap(start, len, prot | PROT_WRITE, + MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (retaddr == -1) return retaddr; @@ -295,15 +295,15 @@ abort(); } /* handle the end of the mapping */ if (end < real_end) { - ret = mmap_frag(real_end - qemu_host_page_size, + ret = mmap_frag(real_end - qemu_host_page_size, real_end - qemu_host_page_size, real_end, - prot, flags, fd, + prot, flags, fd, offset + real_end - qemu_host_page_size - start); if (ret == -1) return ret; real_end -= qemu_host_page_size; } - + /* map the middle (easier) */ if (real_start < real_end) { unsigned long offset1; @@ -311,7 +311,7 @@ abort(); offset1 = 0; else offset1 = offset + real_start - start; - ret = (long)mmap(g2h(real_start), real_end - real_start, + ret = (long)mmap(g2h(real_start), real_end - real_start, prot, flags, fd, offset1); if (ret == -1) return ret; @@ -367,7 +367,7 @@ int target_munmap(target_ulong start, target_ulong len) if (prot != 0) real_end -= qemu_host_page_size; } - + /* unmap what we can */ if (real_start < real_end) { ret = munmap((void *)real_start, real_end - real_start); @@ -381,7 +381,7 @@ int target_munmap(target_ulong start, target_ulong len) /* XXX: currently, we only handle MAP_ANONYMOUS and not MAP_FIXED blocks which have been allocated starting on a host page */ -long target_mremap(target_ulong old_addr, target_ulong old_size, +long target_mremap(target_ulong old_addr, target_ulong old_size, target_ulong new_size, unsigned long flags, target_ulong new_addr) { @@ -410,7 +410,7 @@ int target_msync(target_ulong start, target_ulong len, int flags) return -EINVAL; if (end == start) return 0; - + start &= qemu_host_page_mask; return msync(g2h(start), end - start, flags); } |