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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/kernel/skas/mem_user.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/um/kernel/skas/mem_user.c')
-rw-r--r-- | arch/um/kernel/skas/mem_user.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/arch/um/kernel/skas/mem_user.c b/arch/um/kernel/skas/mem_user.c new file mode 100644 index 000000000000..1310bf1e88d1 --- /dev/null +++ b/arch/um/kernel/skas/mem_user.c @@ -0,0 +1,102 @@ +/* + * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <errno.h> +#include <sys/mman.h> +#include "mem_user.h" +#include "mem.h" +#include "user.h" +#include "os.h" +#include "proc_mm.h" + +void map(int fd, unsigned long virt, unsigned long len, int r, int w, + int x, int phys_fd, unsigned long long offset) +{ + struct proc_mm_op map; + int prot, n; + + prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | + (x ? PROT_EXEC : 0); + + map = ((struct proc_mm_op) { .op = MM_MMAP, + .u = + { .mmap = + { .addr = virt, + .len = len, + .prot = prot, + .flags = MAP_SHARED | + MAP_FIXED, + .fd = phys_fd, + .offset = offset + } } } ); + n = os_write_file(fd, &map, sizeof(map)); + if(n != sizeof(map)) + printk("map : /proc/mm map failed, err = %d\n", -n); +} + +int unmap(int fd, void *addr, unsigned long len) +{ + struct proc_mm_op unmap; + int n; + + unmap = ((struct proc_mm_op) { .op = MM_MUNMAP, + .u = + { .munmap = + { .addr = (unsigned long) addr, + .len = len } } } ); + n = os_write_file(fd, &unmap, sizeof(unmap)); + if(n != sizeof(unmap)) { + if(n < 0) + return(n); + else if(n > 0) + return(-EIO); + } + + return(0); +} + +int protect(int fd, unsigned long addr, unsigned long len, int r, int w, + int x, int must_succeed) +{ + struct proc_mm_op protect; + int prot, n; + + prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | + (x ? PROT_EXEC : 0); + + protect = ((struct proc_mm_op) { .op = MM_MPROTECT, + .u = + { .mprotect = + { .addr = (unsigned long) addr, + .len = len, + .prot = prot } } } ); + + n = os_write_file(fd, &protect, sizeof(protect)); + if(n != sizeof(protect)) { + if(n == 0) return(0); + + if(must_succeed) + panic("protect failed, err = %d", -n); + + return(-EIO); + } + + return(0); +} + +void before_mem_skas(unsigned long unused) +{ +} + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ |