| /* Memory attributes support, for GDB. |
| |
| Copyright 2001, 2002 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program 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 2 of the License, or |
| (at your option) any later version. |
| |
| This program 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 this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "command.h" |
| #include "gdbcmd.h" |
| #include "memattr.h" |
| #include "target.h" |
| #include "value.h" |
| #include "language.h" |
| #include "gdb_string.h" |
| |
| const struct mem_attrib default_mem_attrib = |
| { |
| MEM_RW, /* mode */ |
| MEM_WIDTH_UNSPECIFIED, |
| 0, /* hwbreak */ |
| 0, /* cache */ |
| 0 /* verify */ |
| }; |
| |
| static struct mem_region *mem_region_chain = NULL; |
| static int mem_number = 0; |
| |
| static struct mem_region * |
| create_mem_region (CORE_ADDR lo, CORE_ADDR hi, |
| const struct mem_attrib *attrib) |
| { |
| struct mem_region *n, *new; |
| |
| /* lo == hi is a useless empty region */ |
| if (lo >= hi && hi != 0) |
| { |
| printf_unfiltered ("invalid memory region: low >= high\n"); |
| return NULL; |
| } |
| |
| n = mem_region_chain; |
| while (n) |
| { |
| /* overlapping node */ |
| if ((lo >= n->lo && (lo < n->hi || n->hi == 0)) |
| || (hi > n->lo && (hi <= n->hi || n->hi == 0)) |
| || (lo <= n->lo && (hi >= n->hi || hi == 0))) |
| { |
| printf_unfiltered ("overlapping memory region\n"); |
| return NULL; |
| } |
| n = n->next; |
| } |
| |
| new = xmalloc (sizeof (struct mem_region)); |
| new->lo = lo; |
| new->hi = hi; |
| new->number = ++mem_number; |
| new->enabled_p = 1; |
| new->attrib = *attrib; |
| |
| /* link in new node */ |
| new->next = mem_region_chain; |
| mem_region_chain = new; |
| |
| return new; |
| } |
| |
| static void |
| delete_mem_region (struct mem_region *m) |
| { |
| xfree (m); |
| } |
| |
| /* |
| * Look up the memory region cooresponding to ADDR. |
| */ |
| struct mem_region * |
| lookup_mem_region (CORE_ADDR addr) |
| { |
| static struct mem_region region; |
| struct mem_region *m; |
| CORE_ADDR lo; |
| CORE_ADDR hi; |
| |
| /* First we initialize LO and HI so that they describe the entire |
| memory space. As we process the memory region chain, they are |
| redefined to describe the minimal region containing ADDR. LO |
| and HI are used in the case where no memory region is defined |
| that contains ADDR. If a memory region is disabled, it is |
| treated as if it does not exist. */ |
| |
| lo = (CORE_ADDR) 0; |
| hi = (CORE_ADDR) ~ 0; |
| |
| for (m = mem_region_chain; m; m = m->next) |
| { |
| if (m->enabled_p == 1) |
| { |
| if (addr >= m->lo && (addr < m->hi || m->hi == 0)) |
| return m; |
| |
| if (addr >= m->hi && lo < m->hi) |
| lo = m->hi; |
| |
| if (addr <= m->lo && hi > m->lo) |
| hi = m->lo; |
| } |
| } |
| |
| /* Because no region was found, we must cons up one based on what |
| was learned above. */ |
| region.lo = lo; |
| region.hi = hi; |
| region.attrib = default_mem_attrib; |
| return ®ion; |
| } |
| |
| |
| static void |
| mem_command (char *args, int from_tty) |
| { |
| CORE_ADDR lo, hi; |
| char *tok; |
| struct mem_attrib attrib; |
| |
| if (!args) |
| error_no_arg ("No mem"); |
| |
| tok = strtok (args, " \t"); |
| if (!tok) |
| error ("no lo address"); |
| lo = parse_and_eval_address (tok); |
| |
| tok = strtok (NULL, " \t"); |
| if (!tok) |
| error ("no hi address"); |
| hi = parse_and_eval_address (tok); |
| |
| attrib = default_mem_attrib; |
| while ((tok = strtok (NULL, " \t")) != NULL) |
| { |
| if (strcmp (tok, "rw") == 0) |
| attrib.mode = MEM_RW; |
| else if (strcmp (tok, "ro") == 0) |
| attrib.mode = MEM_RO; |
| else if (strcmp (tok, "wo") == 0) |
| attrib.mode = MEM_WO; |
| |
| else if (strcmp (tok, "8") == 0) |
| attrib.width = MEM_WIDTH_8; |
| else if (strcmp (tok, "16") == 0) |
| { |
| if ((lo % 2 != 0) || (hi % 2 != 0)) |
| error ("region bounds not 16 bit aligned"); |
| attrib.width = MEM_WIDTH_16; |
| } |
| else if (strcmp (tok, "32") == 0) |
| { |
| if ((lo % 4 != 0) || (hi % 4 != 0)) |
| error ("region bounds not 32 bit aligned"); |
| attrib.width = MEM_WIDTH_32; |
| } |
| else if (strcmp (tok, "64") == 0) |
| { |
| if ((lo % 8 != 0) || (hi % 8 != 0)) |
| error ("region bounds not 64 bit aligned"); |
| attrib.width = MEM_WIDTH_64; |
| } |
| |
| #if 0 |
| else if (strcmp (tok, "hwbreak") == 0) |
| attrib.hwbreak = 1; |
| else if (strcmp (tok, "swbreak") == 0) |
| attrib.hwbreak = 0; |
| #endif |
| |
| else if (strcmp (tok, "cache") == 0) |
| attrib.cache = 1; |
| else if (strcmp (tok, "nocache") == 0) |
| attrib.cache = 0; |
| |
| #if 0 |
| else if (strcmp (tok, "verify") == 0) |
| attrib.verify = 1; |
| else if (strcmp (tok, "noverify") == 0) |
| attrib.verify = 0; |
| #endif |
| |
| else |
| error ("unknown attribute: %s", tok); |
| } |
| |
| create_mem_region (lo, hi, &attrib); |
| } |
| |
| |
| static void |
| mem_info_command (char *args, int from_tty) |
| { |
| struct mem_region *m; |
| struct mem_attrib *attrib; |
| |
| if (!mem_region_chain) |
| { |
| printf_unfiltered ("There are no memory regions defined.\n"); |
| return; |
| } |
| |
| printf_filtered ("Num "); |
| printf_filtered ("Enb "); |
| printf_filtered ("Low Addr "); |
| if (TARGET_ADDR_BIT > 32) |
| printf_filtered (" "); |
| printf_filtered ("High Addr "); |
| if (TARGET_ADDR_BIT > 32) |
| printf_filtered (" "); |
| printf_filtered ("Attrs "); |
| printf_filtered ("\n"); |
| |
| for (m = mem_region_chain; m; m = m->next) |
| { |
| char *tmp; |
| printf_filtered ("%-3d %-3c\t", |
| m->number, |
| m->enabled_p ? 'y' : 'n'); |
| if (TARGET_ADDR_BIT <= 32) |
| tmp = local_hex_string_custom ((unsigned long) m->lo, "08l"); |
| else |
| tmp = local_hex_string_custom ((unsigned long) m->lo, "016l"); |
| |
| printf_filtered ("%s ", tmp); |
| |
| if (TARGET_ADDR_BIT <= 32) |
| { |
| if (m->hi == 0) |
| tmp = "0x100000000"; |
| else |
| tmp = local_hex_string_custom ((unsigned long) m->hi, "08l"); |
| } |
| else |
| { |
| if (m->hi == 0) |
| tmp = "0x10000000000000000"; |
| else |
| tmp = local_hex_string_custom ((unsigned long) m->hi, "016l"); |
| } |
| |
| printf_filtered ("%s ", tmp); |
| |
| /* Print a token for each attribute. |
| |
| * FIXME: Should we output a comma after each token? It may |
| * make it easier for users to read, but we'd lose the ability |
| * to cut-and-paste the list of attributes when defining a new |
| * region. Perhaps that is not important. |
| * |
| * FIXME: If more attributes are added to GDB, the output may |
| * become cluttered and difficult for users to read. At that |
| * time, we may want to consider printing tokens only if they |
| * are different from the default attribute. */ |
| |
| attrib = &m->attrib; |
| switch (attrib->mode) |
| { |
| case MEM_RW: |
| printf_filtered ("rw "); |
| break; |
| case MEM_RO: |
| printf_filtered ("ro "); |
| break; |
| case MEM_WO: |
| printf_filtered ("wo "); |
| break; |
| } |
| |
| switch (attrib->width) |
| { |
| case MEM_WIDTH_8: |
| printf_filtered ("8 "); |
| break; |
| case MEM_WIDTH_16: |
| printf_filtered ("16 "); |
| break; |
| case MEM_WIDTH_32: |
| printf_filtered ("32 "); |
| break; |
| case MEM_WIDTH_64: |
| printf_filtered ("64 "); |
| break; |
| case MEM_WIDTH_UNSPECIFIED: |
| break; |
| } |
| |
| #if 0 |
| if (attrib->hwbreak) |
| printf_filtered ("hwbreak"); |
| else |
| printf_filtered ("swbreak"); |
| #endif |
| |
| if (attrib->cache) |
| printf_filtered ("cache "); |
| else |
| printf_filtered ("nocache "); |
| |
| #if 0 |
| if (attrib->verify) |
| printf_filtered ("verify "); |
| else |
| printf_filtered ("noverify "); |
| #endif |
| |
| printf_filtered ("\n"); |
| |
| gdb_flush (gdb_stdout); |
| } |
| } |
| |
| |
| /* Enable the memory region number NUM. */ |
| |
| static void |
| mem_enable (int num) |
| { |
| struct mem_region *m; |
| |
| for (m = mem_region_chain; m; m = m->next) |
| if (m->number == num) |
| { |
| m->enabled_p = 1; |
| return; |
| } |
| printf_unfiltered ("No memory region number %d.\n", num); |
| } |
| |
| static void |
| mem_enable_command (char *args, int from_tty) |
| { |
| char *p = args; |
| char *p1; |
| int num; |
| struct mem_region *m; |
| |
| dcache_invalidate (target_dcache); |
| |
| if (p == 0) |
| { |
| for (m = mem_region_chain; m; m = m->next) |
| m->enabled_p = 1; |
| } |
| else |
| while (*p) |
| { |
| p1 = p; |
| while (*p1 >= '0' && *p1 <= '9') |
| p1++; |
| if (*p1 && *p1 != ' ' && *p1 != '\t') |
| error ("Arguments must be memory region numbers."); |
| |
| num = atoi (p); |
| mem_enable (num); |
| |
| p = p1; |
| while (*p == ' ' || *p == '\t') |
| p++; |
| } |
| } |
| |
| |
| /* Disable the memory region number NUM. */ |
| |
| static void |
| mem_disable (int num) |
| { |
| struct mem_region *m; |
| |
| for (m = mem_region_chain; m; m = m->next) |
| if (m->number == num) |
| { |
| m->enabled_p = 0; |
| return; |
| } |
| printf_unfiltered ("No memory region number %d.\n", num); |
| } |
| |
| static void |
| mem_disable_command (char *args, int from_tty) |
| { |
| char *p = args; |
| char *p1; |
| int num; |
| struct mem_region *m; |
| |
| dcache_invalidate (target_dcache); |
| |
| if (p == 0) |
| { |
| for (m = mem_region_chain; m; m = m->next) |
| m->enabled_p = 0; |
| } |
| else |
| while (*p) |
| { |
| p1 = p; |
| while (*p1 >= '0' && *p1 <= '9') |
| p1++; |
| if (*p1 && *p1 != ' ' && *p1 != '\t') |
| error ("Arguments must be memory region numbers."); |
| |
| num = atoi (p); |
| mem_disable (num); |
| |
| p = p1; |
| while (*p == ' ' || *p == '\t') |
| p++; |
| } |
| } |
| |
| /* Clear memory region list */ |
| |
| static void |
| mem_clear (void) |
| { |
| struct mem_region *m; |
| |
| while ((m = mem_region_chain) != 0) |
| { |
| mem_region_chain = m->next; |
| delete_mem_region (m); |
| } |
| } |
| |
| /* Delete the memory region number NUM. */ |
| |
| static void |
| mem_delete (int num) |
| { |
| struct mem_region *m1, *m; |
| |
| if (!mem_region_chain) |
| { |
| printf_unfiltered ("No memory region number %d.\n", num); |
| return; |
| } |
| |
| if (mem_region_chain->number == num) |
| { |
| m1 = mem_region_chain; |
| mem_region_chain = m1->next; |
| delete_mem_region (m1); |
| } |
| else |
| for (m = mem_region_chain; m->next; m = m->next) |
| { |
| if (m->next->number == num) |
| { |
| m1 = m->next; |
| m->next = m1->next; |
| delete_mem_region (m1); |
| break; |
| } |
| } |
| } |
| |
| static void |
| mem_delete_command (char *args, int from_tty) |
| { |
| char *p = args; |
| char *p1; |
| int num; |
| |
| dcache_invalidate (target_dcache); |
| |
| if (p == 0) |
| { |
| if (query ("Delete all memory regions? ")) |
| mem_clear (); |
| dont_repeat (); |
| return; |
| } |
| |
| while (*p) |
| { |
| p1 = p; |
| while (*p1 >= '0' && *p1 <= '9') |
| p1++; |
| if (*p1 && *p1 != ' ' && *p1 != '\t') |
| error ("Arguments must be memory region numbers."); |
| |
| num = atoi (p); |
| mem_delete (num); |
| |
| p = p1; |
| while (*p == ' ' || *p == '\t') |
| p++; |
| } |
| |
| dont_repeat (); |
| } |
| |
| void |
| _initialize_mem (void) |
| { |
| add_com ("mem", class_vars, mem_command, |
| "Define attributes for memory region.\n\ |
| Usage: mem <lo addr> <hi addr> [<mode> <width> <cache>], \n\ |
| where <mode> may be rw (read/write), ro (read-only) or wo (write-only), \n\ |
| <width> may be 8, 16, 32, or 64, and \n\ |
| <cache> may be cache or nocache"); |
| |
| add_cmd ("mem", class_vars, mem_enable_command, |
| "Enable memory region.\n\ |
| Arguments are the code numbers of the memory regions to enable.\n\ |
| Usage: enable mem <code number>\n\ |
| Do \"info mem\" to see current list of code numbers.", &enablelist); |
| |
| add_cmd ("mem", class_vars, mem_disable_command, |
| "Disable memory region.\n\ |
| Arguments are the code numbers of the memory regions to disable.\n\ |
| Usage: disable mem <code number>\n\ |
| Do \"info mem\" to see current list of code numbers.", &disablelist); |
| |
| add_cmd ("mem", class_vars, mem_delete_command, |
| "Delete memory region.\n\ |
| Arguments are the code numbers of the memory regions to delete.\n\ |
| Usage: delete mem <code number>\n\ |
| Do \"info mem\" to see current list of code numbers.", &deletelist); |
| |
| add_info ("mem", mem_info_command, |
| "Memory region attributes"); |
| } |