diff options
Diffstat (limited to 'abs/core/grub-gfx/040_all_grub-0.96-nxstack.patch')
| -rw-r--r-- | abs/core/grub-gfx/040_all_grub-0.96-nxstack.patch | 623 |
1 files changed, 623 insertions, 0 deletions
diff --git a/abs/core/grub-gfx/040_all_grub-0.96-nxstack.patch b/abs/core/grub-gfx/040_all_grub-0.96-nxstack.patch new file mode 100644 index 0000000..121941c --- /dev/null +++ b/abs/core/grub-gfx/040_all_grub-0.96-nxstack.patch @@ -0,0 +1,623 @@ +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) |