diff options
Diffstat (limited to '040_all_grub-0.96-nxstack.patch')
| -rw-r--r-- | 040_all_grub-0.96-nxstack.patch | 623 |
1 files changed, 0 insertions, 623 deletions
diff --git a/040_all_grub-0.96-nxstack.patch b/040_all_grub-0.96-nxstack.patch deleted file mode 100644 index 121941c75787..000000000000 --- a/040_all_grub-0.96-nxstack.patch +++ /dev/null @@ -1,623 +0,0 @@ -Fix NX segfaulting on amd64. - -Patch by Peter Jones. - -http://lists.gnu.org/archive/html/bug-grub/2005-03/msg00011.html - ---- grub-0.97/grub/asmstub.c -+++ grub-0.97/grub/asmstub.c -@@ -42,6 +42,7 @@ - #include <sys/time.h> - #include <termios.h> - #include <signal.h> -+#include <sys/mman.h> - - #ifdef __linux__ - # include <sys/ioctl.h> /* ioctl */ -@@ -79,7 +80,7 @@ - struct apm_info apm_bios_info; - - /* Emulation requirements. */ --char *grub_scratch_mem = 0; -+void *grub_scratch_mem = 0; - - struct geometry *disks = 0; - -@@ -103,14 +104,62 @@ - static unsigned int serial_speed; - #endif /* SIMULATE_SLOWNESS_OF_SERIAL */ - -+/* This allocates page-aligned storage of the specified size, which must be -+ * a multiple of the page size as determined by calling sysconf(_SC_PAGESIZE) -+ */ -+#ifdef __linux__ -+static void * -+grub_mmap_alloc(size_t len) -+{ -+ int mmap_flags = MAP_ANONYMOUS|MAP_PRIVATE|MAP_EXECUTABLE; -+ -+#ifdef MAP_32BIT -+ mmap_flags |= MAP_32BIT; -+#endif -+ /* Mark the simulated stack executable, as GCC uses stack trampolines -+ * to implement nested functions. */ -+ return mmap(NULL, len, PROT_READ|PROT_WRITE|PROT_EXEC, mmap_flags, -1, 0); -+} -+#else /* !defined(__linux__) */ -+static void * -+grub_mmap_alloc(size_t len) -+{ -+ int fd = 0, offset = 0, ret = 0; -+ void *pa = MAP_FAILED; -+ char template[] = "/tmp/grub_mmap_alloc_XXXXXX"; -+ errno_t e; -+ -+ fd = mkstemp(template); -+ if (fd < 0) -+ return pa; -+ -+ unlink(template); -+ -+ ret = ftruncate(fd, len); -+ if (ret < 0) -+ return pa; -+ -+ /* Mark the simulated stack executable, as GCC uses stack trampolines -+ * to implement nested functions. */ -+ pa = mmap(NULL, len, PROT_READ|PROT_WRITE|PROT_EXEC, -+ MAP_PRIVATE|MAP_EXECUTABLE, fd, offset); -+ -+ e = errno; -+ close(fd); -+ errno = e; -+ return pa; -+} -+#endif /* defined(__linux__) */ -+ - /* The main entry point into this mess. */ - int - grub_stage2 (void) - { - /* These need to be static, because they survive our stack transitions. */ - static int status = 0; -- static char *realstack; -- char *scratch, *simstack; -+ static void *realstack; -+ void *simstack_alloc_base, *simstack; -+ size_t simstack_size, page_size; - int i; - - /* We need a nested function so that we get a clean stack frame, -@@ -140,9 +189,35 @@ - } - - assert (grub_scratch_mem == 0); -- scratch = malloc (0x100000 + EXTENDED_MEMSIZE + 15); -- assert (scratch); -- grub_scratch_mem = (char *) ((((int) scratch) >> 4) << 4); -+ -+ /* Allocate enough pages for 0x100000 + EXTENDED_SIZE + 15, and -+ * make sure the memory is aligned to a multiple of the system's -+ * page size */ -+ page_size = sysconf (_SC_PAGESIZE); -+ simstack_size = ( 0x100000 + EXTENDED_MEMSIZE + 15); -+ if (simstack_size % page_size) -+ { -+ /* If we're not on a page_size boundary, round up to the next one */ -+ simstack_size &= ~(page_size-1); -+ simstack_size += page_size; -+ } -+ -+ /* Add one for a PROT_NONE boundary page at each end. */ -+ simstack_size += 2 * page_size; -+ -+ simstack_alloc_base = grub_mmap_alloc(simstack_size); -+ assert (simstack_alloc_base != MAP_FAILED); -+ -+ /* mark pages above and below our simstack area as innaccessable. -+ * If the implementation we're using doesn't support that, then the -+ * new protection modes are undefined. It's safe to just ignore -+ * them, though. It'd be nice if we knew that we'd get a SEGV for -+ * touching the area, but that's all. it'd be nice to have. */ -+ mprotect (simstack_alloc_base, page_size, PROT_NONE); -+ mprotect ((void *)((unsigned long)simstack_alloc_base + -+ simstack_size - page_size), page_size, PROT_NONE); -+ -+ grub_scratch_mem = (void *)((unsigned long)simstack_alloc_base + page_size); - - /* FIXME: simulate the memory holes using mprot, if available. */ - -@@ -215,7 +290,7 @@ - device_map = 0; - free (disks); - disks = 0; -- free (scratch); -+ munmap(simstack_alloc_base, simstack_size); - grub_scratch_mem = 0; - - if (serial_device) ---- grub-0.97/stage2/builtins.c -+++ grub-0.97/stage2/builtins.c -@@ -131,63 +131,98 @@ - } - - -+/* blocklist_read_helper nee disk_read_blocklist_func was a nested -+ * function, to which pointers were taken and exposed globally. Even -+ * in the GNU-C nested functions extension, they have local linkage, -+ * and aren't guaranteed to be accessable *at all* outside of their -+ * containing scope. -+ * -+ * Above and beyond all of that, the variables within blocklist_func_context -+ * are originally local variables, with local (not even static) linkage, -+ * from within blocklist_func. These were each referenced by -+ * disk_read_blocklist_func, which is only called from other functions -+ * through a globally scoped pointer. -+ * -+ * The documentation in GCC actually uses the words "all hell will break -+ * loose" to describe this scenario. -+ * -+ * Also, "start_sector" was also used uninitialized, but gcc doesn't warn -+ * about it (possibly because of the scoping madness?) -+ */ -+ -+static struct { -+ int start_sector; -+ int num_sectors; -+ int num_entries; -+ int last_length; -+} blocklist_func_context = { -+ .start_sector = 0, -+ .num_sectors = 0, -+ .num_entries = 0, -+ .last_length = 0 -+}; -+ -+/* Collect contiguous blocks into one entry as many as possible, -+ and print the blocklist notation on the screen. */ -+static void -+blocklist_read_helper (int sector, int offset, int length) -+{ -+ int *start_sector = &blocklist_func_context.start_sector; -+ int *num_sectors = &blocklist_func_context.num_sectors; -+ int *num_entries = &blocklist_func_context.num_entries; -+ int *last_length = &blocklist_func_context.last_length; -+ -+ if (*num_sectors > 0) -+ { -+ if (*start_sector + *num_sectors == sector -+ && offset == 0 && *last_length == SECTOR_SIZE) -+ { -+ *num_sectors++; -+ *last_length = length; -+ return; -+ } -+ else -+ { -+ if (*last_length == SECTOR_SIZE) -+ grub_printf ("%s%d+%d", *num_entries ? "," : "", -+ *start_sector - part_start, *num_sectors); -+ else if (*num_sectors > 1) -+ grub_printf ("%s%d+%d,%d[0-%d]", *num_entries ? "," : "", -+ *start_sector - part_start, *num_sectors-1, -+ *start_sector + *num_sectors-1 - part_start, -+ *last_length); -+ else -+ grub_printf ("%s%d[0-%d]", *num_entries ? "," : "", -+ *start_sector - part_start, *last_length); -+ *num_entries++; -+ *num_sectors = 0; -+ } -+ } -+ -+ if (offset > 0) -+ { -+ grub_printf("%s%d[%d-%d]", *num_entries ? "," : "", -+ sector-part_start, offset, offset+length); -+ *num_entries++; -+ } -+ else -+ { -+ *start_sector = sector; -+ *num_sectors = 1; -+ *last_length = length; -+ } -+} -+ - /* blocklist */ - static int - blocklist_func (char *arg, int flags) - { - char *dummy = (char *) RAW_ADDR (0x100000); -- int start_sector; -- int num_sectors = 0; -- int num_entries = 0; -- int last_length = 0; -- -- auto void disk_read_blocklist_func (int sector, int offset, int length); -- -- /* Collect contiguous blocks into one entry as many as possible, -- and print the blocklist notation on the screen. */ -- auto void disk_read_blocklist_func (int sector, int offset, int length) -- { -- if (num_sectors > 0) -- { -- if (start_sector + num_sectors == sector -- && offset == 0 && last_length == SECTOR_SIZE) -- { -- num_sectors++; -- last_length = length; -- return; -- } -- else -- { -- if (last_length == SECTOR_SIZE) -- grub_printf ("%s%d+%d", num_entries ? "," : "", -- start_sector - part_start, num_sectors); -- else if (num_sectors > 1) -- grub_printf ("%s%d+%d,%d[0-%d]", num_entries ? "," : "", -- start_sector - part_start, num_sectors-1, -- start_sector + num_sectors-1 - part_start, -- last_length); -- else -- grub_printf ("%s%d[0-%d]", num_entries ? "," : "", -- start_sector - part_start, last_length); -- num_entries++; -- num_sectors = 0; -- } -- } -- -- if (offset > 0) -- { -- grub_printf("%s%d[%d-%d]", num_entries ? "," : "", -- sector-part_start, offset, offset+length); -- num_entries++; -- } -- else -- { -- start_sector = sector; -- num_sectors = 1; -- last_length = length; -- } -- } - -+ int *start_sector = &blocklist_func_context.start_sector; -+ int *num_sectors = &blocklist_func_context.num_sectors; -+ int *num_entries = &blocklist_func_context.num_entries; -+ - /* Open the file. */ - if (! grub_open (arg)) - return 1; -@@ -204,15 +241,15 @@ - grub_printf (")"); - - /* Read in the whole file to DUMMY. */ -- disk_read_hook = disk_read_blocklist_func; -+ disk_read_hook = blocklist_read_helper; - if (! grub_read (dummy, -1)) - goto fail; - - /* The last entry may not be printed yet. Don't check if it is a - * full sector, since it doesn't matter if we read too much. */ -- if (num_sectors > 0) -- grub_printf ("%s%d+%d", num_entries ? "," : "", -- start_sector - part_start, num_sectors); -+ if (*num_sectors > 0) -+ grub_printf ("%s%d+%d", *num_entries ? "," : "", -+ *start_sector - part_start, *num_sectors); - - grub_printf ("\n"); - -@@ -1868,6 +1905,77 @@ - - - /* install */ -+static struct { -+ int saved_sector; -+ int installaddr; -+ int installlist; -+ char *stage2_first_buffer; -+} install_func_context = { -+ .saved_sector = 0, -+ .installaddr = 0, -+ .installlist = 0, -+ .stage2_first_buffer = NULL, -+}; -+ -+/* Save the first sector of Stage2 in STAGE2_SECT. */ -+/* Formerly disk_read_savesect_func with local scope inside install_func */ -+static void -+install_savesect_helper(int sector, int offset, int length) -+{ -+ if (debug) -+ printf ("[%d]", sector); -+ -+ /* ReiserFS has files which sometimes contain data not aligned -+ on sector boundaries. Returning an error is better than -+ silently failing. */ -+ if (offset != 0 || length != SECTOR_SIZE) -+ errnum = ERR_UNALIGNED; -+ -+ install_func_context.saved_sector = sector; -+} -+ -+/* Write SECTOR to INSTALLLIST, and update INSTALLADDR and INSTALLSECT. */ -+/* Formerly disk_read_blocklist_func with local scope inside install_func */ -+static void -+install_blocklist_helper (int sector, int offset, int length) -+{ -+ int *installaddr = &install_func_context.installaddr; -+ int *installlist = &install_func_context.installlist; -+ char **stage2_first_buffer = &install_func_context.stage2_first_buffer; -+ /* Was the last sector full? */ -+ static int last_length = SECTOR_SIZE; -+ -+ if (debug) -+ printf("[%d]", sector); -+ -+ if (offset != 0 || last_length != SECTOR_SIZE) -+ { -+ /* We found a non-sector-aligned data block. */ -+ errnum = ERR_UNALIGNED; -+ return; -+ } -+ -+ last_length = length; -+ -+ if (*((unsigned long *) (*installlist - 4)) -+ + *((unsigned short *) *installlist) != sector -+ || *installlist == (int) *stage2_first_buffer + SECTOR_SIZE + 4) -+ { -+ *installlist -= 8; -+ -+ if (*((unsigned long *) (*installlist - 8))) -+ errnum = ERR_WONT_FIT; -+ else -+ { -+ *((unsigned short *) (*installlist + 2)) = (*installaddr >> 4); -+ *((unsigned long *) (*installlist - 4)) = sector; -+ } -+ } -+ -+ *((unsigned short *) *installlist) += 1; -+ *installaddr += 512; -+} -+ - static int - install_func (char *arg, int flags) - { -@@ -1875,8 +1983,12 @@ - char *stage1_buffer = (char *) RAW_ADDR (0x100000); - char *stage2_buffer = stage1_buffer + SECTOR_SIZE; - char *old_sect = stage2_buffer + SECTOR_SIZE; -- char *stage2_first_buffer = old_sect + SECTOR_SIZE; -- char *stage2_second_buffer = stage2_first_buffer + SECTOR_SIZE; -+ /* stage2_first_buffer used to be defined as: -+ * char *stage2_first_buffer = old_sect + SECTOR_SIZE; */ -+ char **stage2_first_buffer = &install_func_context.stage2_first_buffer; -+ /* and stage2_second_buffer was: -+ * char *stage2_second_buffer = stage2_first_buffer + SECTOR_SIZE; */ -+ char *stage2_second_buffer = old_sect + SECTOR_SIZE + SECTOR_SIZE; - /* XXX: Probably SECTOR_SIZE is reasonable. */ - char *config_filename = stage2_second_buffer + SECTOR_SIZE; - char *dummy = config_filename + SECTOR_SIZE; -@@ -1885,10 +1997,11 @@ - int src_drive, src_partition, src_part_start; - int i; - struct geometry dest_geom, src_geom; -- int saved_sector; -+ int *saved_sector = &install_func_context.saved_sector; - int stage2_first_sector, stage2_second_sector; - char *ptr; -- int installaddr, installlist; -+ int *installaddr = &install_func_context.installaddr; -+ int *installlist = &install_func_context.installlist; - /* Point to the location of the name of a configuration file in Stage 2. */ - char *config_file_location; - /* If FILE is a Stage 1.5? */ -@@ -1897,67 +2010,13 @@ - int is_open = 0; - /* If LBA is forced? */ - int is_force_lba = 0; -- /* Was the last sector full? */ -- int last_length = SECTOR_SIZE; -- -+ -+ *stage2_first_buffer = old_sect + SECTOR_SIZE; - #ifdef GRUB_UTIL - /* If the Stage 2 is in a partition mounted by an OS, this will store - the filename under the OS. */ - char *stage2_os_file = 0; - #endif /* GRUB_UTIL */ -- -- auto void disk_read_savesect_func (int sector, int offset, int length); -- auto void disk_read_blocklist_func (int sector, int offset, int length); -- -- /* Save the first sector of Stage2 in STAGE2_SECT. */ -- auto void disk_read_savesect_func (int sector, int offset, int length) -- { -- if (debug) -- printf ("[%d]", sector); -- -- /* ReiserFS has files which sometimes contain data not aligned -- on sector boundaries. Returning an error is better than -- silently failing. */ -- if (offset != 0 || length != SECTOR_SIZE) -- errnum = ERR_UNALIGNED; -- -- saved_sector = sector; -- } -- -- /* Write SECTOR to INSTALLLIST, and update INSTALLADDR and -- INSTALLSECT. */ -- auto void disk_read_blocklist_func (int sector, int offset, int length) -- { -- if (debug) -- printf("[%d]", sector); -- -- if (offset != 0 || last_length != SECTOR_SIZE) -- { -- /* We found a non-sector-aligned data block. */ -- errnum = ERR_UNALIGNED; -- return; -- } -- -- last_length = length; -- -- if (*((unsigned long *) (installlist - 4)) -- + *((unsigned short *) installlist) != sector -- || installlist == (int) stage2_first_buffer + SECTOR_SIZE + 4) -- { -- installlist -= 8; -- -- if (*((unsigned long *) (installlist - 8))) -- errnum = ERR_WONT_FIT; -- else -- { -- *((unsigned short *) (installlist + 2)) = (installaddr >> 4); -- *((unsigned long *) (installlist - 4)) = sector; -- } -- } -- -- *((unsigned short *) installlist) += 1; -- installaddr += 512; -- } - - /* First, check the GNU-style long option. */ - while (1) -@@ -1987,10 +2049,10 @@ - addr = skip_to (0, file); - - /* Get the installation address. */ -- if (! safe_parse_maxint (&addr, &installaddr)) -+ if (! safe_parse_maxint (&addr, installaddr)) - { - /* ADDR is not specified. */ -- installaddr = 0; -+ *installaddr = 0; - ptr = addr; - errnum = 0; - } -@@ -2084,17 +2146,17 @@ - = (dest_drive & BIOS_FLAG_FIXED_DISK); - - /* Read the first sector of Stage 2. */ -- disk_read_hook = disk_read_savesect_func; -- if (grub_read (stage2_first_buffer, SECTOR_SIZE) != SECTOR_SIZE) -+ disk_read_hook = install_savesect_helper; -+ if (grub_read (*stage2_first_buffer, SECTOR_SIZE) != SECTOR_SIZE) - goto fail; - -- stage2_first_sector = saved_sector; -+ stage2_first_sector = *saved_sector; - - /* Read the second sector of Stage 2. */ - if (grub_read (stage2_second_buffer, SECTOR_SIZE) != SECTOR_SIZE) - goto fail; - -- stage2_second_sector = saved_sector; -+ stage2_second_sector = *saved_sector; - - /* Check for the version of Stage 2. */ - if (*((short *) (stage2_second_buffer + STAGE2_VER_MAJ_OFFS)) -@@ -2110,27 +2172,27 @@ - - /* If INSTALLADDR is not specified explicitly in the command-line, - determine it by the Stage 2 id. */ -- if (! installaddr) -+ if (! *installaddr) - { - if (! is_stage1_5) - /* Stage 2. */ -- installaddr = 0x8000; -+ *installaddr = 0x8000; - else - /* Stage 1.5. */ -- installaddr = 0x2000; -+ *installaddr = 0x2000; - } - - *((unsigned long *) (stage1_buffer + STAGE1_STAGE2_SECTOR)) - = stage2_first_sector; - *((unsigned short *) (stage1_buffer + STAGE1_STAGE2_ADDRESS)) -- = installaddr; -+ = *installaddr; - *((unsigned short *) (stage1_buffer + STAGE1_STAGE2_SEGMENT)) -- = installaddr >> 4; -+ = *installaddr >> 4; - -- i = (int) stage2_first_buffer + SECTOR_SIZE - 4; -+ i = (int) *stage2_first_buffer + SECTOR_SIZE - 4; - while (*((unsigned long *) i)) - { -- if (i < (int) stage2_first_buffer -+ if (i < (int) *stage2_first_buffer - || (*((int *) (i - 4)) & 0x80000000) - || *((unsigned short *) i) >= 0xA00 - || *((short *) (i + 2)) == 0) -@@ -2144,13 +2206,13 @@ - i -= 8; - } - -- installlist = (int) stage2_first_buffer + SECTOR_SIZE + 4; -- installaddr += SECTOR_SIZE; -+ *installlist = (int) *stage2_first_buffer + SECTOR_SIZE + 4; -+ *installaddr += SECTOR_SIZE; - - /* Read the whole of Stage2 except for the first sector. */ - grub_seek (SECTOR_SIZE); - -- disk_read_hook = disk_read_blocklist_func; -+ disk_read_hook = install_blocklist_helper; - if (! grub_read (dummy, -1)) - goto fail; - -@@ -2233,7 +2295,7 @@ - /* Skip the first sector. */ - grub_seek (SECTOR_SIZE); - -- disk_read_hook = disk_read_savesect_func; -+ disk_read_hook = install_savesect_helper; - if (grub_read (stage2_buffer, SECTOR_SIZE) != SECTOR_SIZE) - goto fail; - -@@ -2303,7 +2365,7 @@ - else - #endif /* GRUB_UTIL */ - { -- if (! devwrite (saved_sector - part_start, 1, stage2_buffer)) -+ if (! devwrite (*saved_sector - part_start, 1, stage2_buffer)) - goto fail; - } - } -@@ -2325,7 +2387,7 @@ - goto fail; - } - -- if (fwrite (stage2_first_buffer, 1, SECTOR_SIZE, fp) != SECTOR_SIZE) -+ if (fwrite (*stage2_first_buffer, 1, SECTOR_SIZE, fp) != SECTOR_SIZE) - { - fclose (fp); - errnum = ERR_WRITE; -@@ -2352,7 +2414,7 @@ - goto fail; - - if (! devwrite (stage2_first_sector - src_part_start, 1, -- stage2_first_buffer)) -+ *stage2_first_buffer)) - goto fail; - - if (! devwrite (stage2_second_sector - src_part_start, 1, ---- grub-0.97/stage2/shared.h -+++ grub-0.97/stage2/shared.h -@@ -36,8 +36,8 @@ - - /* Maybe redirect memory requests through grub_scratch_mem. */ - #ifdef GRUB_UTIL --extern char *grub_scratch_mem; --# define RAW_ADDR(x) ((x) + (int) grub_scratch_mem) -+extern void *grub_scratch_mem; -+# define RAW_ADDR(x) ((x) + (unsigned long) grub_scratch_mem) - # define RAW_SEG(x) (RAW_ADDR ((x) << 4) >> 4) - #else - # define RAW_ADDR(x) (x) |