| /* Native support for the SGI Iris running IRIX version 5, for GDB. |
| Copyright 1988, 89, 90, 91, 92, 93, 94, 95, 96, 98, 1999 |
| Free Software Foundation, Inc. |
| Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU |
| and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. |
| Implemented for Irix 4.x by Garrett A. Wollman. |
| Modified for Irix 5.x by Ian Lance Taylor. |
| |
| 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 "inferior.h" |
| #include "gdbcore.h" |
| #include "target.h" |
| |
| #include "gdb_string.h" |
| #include <sys/time.h> |
| #include <sys/procfs.h> |
| #include <setjmp.h> /* For JB_XXX. */ |
| |
| static void |
| fetch_core_registers PARAMS ((char *, unsigned int, int, CORE_ADDR)); |
| |
| /* Size of elements in jmpbuf */ |
| |
| #define JB_ELEMENT_SIZE 4 |
| |
| /* |
| * See the comment in m68k-tdep.c regarding the utility of these functions. |
| * |
| * These definitions are from the MIPS SVR4 ABI, so they may work for |
| * any MIPS SVR4 target. |
| */ |
| |
| void |
| supply_gregset (gregsetp) |
| gregset_t *gregsetp; |
| { |
| register int regi; |
| register greg_t *regp = &(*gregsetp)[0]; |
| int gregoff = sizeof (greg_t) - MIPS_REGSIZE; |
| static char zerobuf[MAX_REGISTER_RAW_SIZE] = |
| {0}; |
| |
| for (regi = 0; regi <= CTX_RA; regi++) |
| supply_register (regi, (char *) (regp + regi) + gregoff); |
| |
| supply_register (PC_REGNUM, (char *) (regp + CTX_EPC) + gregoff); |
| supply_register (HI_REGNUM, (char *) (regp + CTX_MDHI) + gregoff); |
| supply_register (LO_REGNUM, (char *) (regp + CTX_MDLO) + gregoff); |
| supply_register (CAUSE_REGNUM, (char *) (regp + CTX_CAUSE) + gregoff); |
| |
| /* Fill inaccessible registers with zero. */ |
| supply_register (BADVADDR_REGNUM, zerobuf); |
| } |
| |
| void |
| fill_gregset (gregsetp, regno) |
| gregset_t *gregsetp; |
| int regno; |
| { |
| int regi; |
| register greg_t *regp = &(*gregsetp)[0]; |
| |
| /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32 |
| executable, we have to sign extend the registers to 64 bits before |
| filling in the gregset structure. */ |
| |
| for (regi = 0; regi <= CTX_RA; regi++) |
| if ((regno == -1) || (regno == regi)) |
| *(regp + regi) = |
| extract_signed_integer (®isters[REGISTER_BYTE (regi)], |
| REGISTER_RAW_SIZE (regi)); |
| |
| if ((regno == -1) || (regno == PC_REGNUM)) |
| *(regp + CTX_EPC) = |
| extract_signed_integer (®isters[REGISTER_BYTE (PC_REGNUM)], |
| REGISTER_RAW_SIZE (PC_REGNUM)); |
| |
| if ((regno == -1) || (regno == CAUSE_REGNUM)) |
| *(regp + CTX_CAUSE) = |
| extract_signed_integer (®isters[REGISTER_BYTE (CAUSE_REGNUM)], |
| REGISTER_RAW_SIZE (CAUSE_REGNUM)); |
| |
| if ((regno == -1) || (regno == HI_REGNUM)) |
| *(regp + CTX_MDHI) = |
| extract_signed_integer (®isters[REGISTER_BYTE (HI_REGNUM)], |
| REGISTER_RAW_SIZE (HI_REGNUM)); |
| |
| if ((regno == -1) || (regno == LO_REGNUM)) |
| *(regp + CTX_MDLO) = |
| extract_signed_integer (®isters[REGISTER_BYTE (LO_REGNUM)], |
| REGISTER_RAW_SIZE (LO_REGNUM)); |
| } |
| |
| /* |
| * Now we do the same thing for floating-point registers. |
| * We don't bother to condition on FP0_REGNUM since any |
| * reasonable MIPS configuration has an R3010 in it. |
| * |
| * Again, see the comments in m68k-tdep.c. |
| */ |
| |
| void |
| supply_fpregset (fpregsetp) |
| fpregset_t *fpregsetp; |
| { |
| register int regi; |
| static char zerobuf[MAX_REGISTER_RAW_SIZE] = |
| {0}; |
| |
| /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ |
| |
| for (regi = 0; regi < 32; regi++) |
| supply_register (FP0_REGNUM + regi, |
| (char *) &fpregsetp->fp_r.fp_regs[regi]); |
| |
| supply_register (FCRCS_REGNUM, (char *) &fpregsetp->fp_csr); |
| |
| /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */ |
| supply_register (FCRIR_REGNUM, zerobuf); |
| } |
| |
| void |
| fill_fpregset (fpregsetp, regno) |
| fpregset_t *fpregsetp; |
| int regno; |
| { |
| int regi; |
| char *from, *to; |
| |
| /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ |
| |
| for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) |
| { |
| if ((regno == -1) || (regno == regi)) |
| { |
| from = (char *) ®isters[REGISTER_BYTE (regi)]; |
| to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]); |
| memcpy (to, from, REGISTER_RAW_SIZE (regi)); |
| } |
| } |
| |
| if ((regno == -1) || (regno == FCRCS_REGNUM)) |
| fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE (FCRCS_REGNUM)]; |
| } |
| |
| |
| /* Figure out where the longjmp will land. |
| We expect the first arg to be a pointer to the jmp_buf structure from which |
| we extract the pc (JB_PC) that we will land at. The pc is copied into PC. |
| This routine returns true on success. */ |
| |
| int |
| get_longjmp_target (pc) |
| CORE_ADDR *pc; |
| { |
| char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT]; |
| CORE_ADDR jb_addr; |
| |
| jb_addr = read_register (A0_REGNUM); |
| |
| if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, |
| TARGET_PTR_BIT / TARGET_CHAR_BIT)) |
| return 0; |
| |
| *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); |
| |
| return 1; |
| } |
| |
| static void |
| fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) |
| char *core_reg_sect; |
| unsigned core_reg_size; |
| int which; /* Unused */ |
| CORE_ADDR reg_addr; /* Unused */ |
| { |
| if (core_reg_size == REGISTER_BYTES) |
| { |
| memcpy ((char *) registers, core_reg_sect, core_reg_size); |
| } |
| else if (MIPS_REGSIZE == 4 && |
| core_reg_size == (2 * MIPS_REGSIZE) * NUM_REGS) |
| { |
| /* This is a core file from a N32 executable, 64 bits are saved |
| for all registers. */ |
| char *srcp = core_reg_sect; |
| char *dstp = registers; |
| int regno; |
| |
| for (regno = 0; regno < NUM_REGS; regno++) |
| { |
| if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32)) |
| { |
| /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB |
| currently assumes that they are 32 bit. */ |
| *dstp++ = *srcp++; |
| *dstp++ = *srcp++; |
| *dstp++ = *srcp++; |
| *dstp++ = *srcp++; |
| if (REGISTER_RAW_SIZE (regno) == 4) |
| { |
| /* copying 4 bytes from eight bytes? |
| I don't see how this can be right... */ |
| srcp += 4; |
| } |
| else |
| { |
| /* copy all 8 bytes (sizeof(double)) */ |
| *dstp++ = *srcp++; |
| *dstp++ = *srcp++; |
| *dstp++ = *srcp++; |
| *dstp++ = *srcp++; |
| } |
| } |
| else |
| { |
| srcp += 4; |
| *dstp++ = *srcp++; |
| *dstp++ = *srcp++; |
| *dstp++ = *srcp++; |
| *dstp++ = *srcp++; |
| } |
| } |
| } |
| else |
| { |
| warning ("wrong size gregset struct in core file"); |
| return; |
| } |
| |
| registers_fetched (); |
| } |
| |
| /* Irix 5 uses what appears to be a unique form of shared library |
| support. This is a copy of solib.c modified for Irix 5. */ |
| /* FIXME: Most of this code could be merged with osfsolib.c and solib.c |
| by using next_link_map_member and xfer_link_map_member in solib.c. */ |
| |
| #include <sys/types.h> |
| #include <signal.h> |
| #include <sys/param.h> |
| #include <fcntl.h> |
| |
| /* <obj.h> includes <sym.h> and <symconst.h>, which causes conflicts |
| with our versions of those files included by tm-mips.h. Prevent |
| <obj.h> from including them with some appropriate defines. */ |
| #define __SYM_H__ |
| #define __SYMCONST_H__ |
| #include <obj.h> |
| #ifdef HAVE_OBJLIST_H |
| #include <objlist.h> |
| #endif |
| |
| #ifdef NEW_OBJ_INFO_MAGIC |
| #define HANDLE_NEW_OBJ_LIST |
| #endif |
| |
| #include "symtab.h" |
| #include "bfd.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "command.h" |
| #include "frame.h" |
| #include "gnu-regex.h" |
| #include "inferior.h" |
| #include "language.h" |
| #include "gdbcmd.h" |
| |
| /* The symbol which starts off the list of shared libraries. */ |
| #define DEBUG_BASE "__rld_obj_head" |
| |
| /* Irix 6.x introduces a new variant of object lists. |
| To be able to debug O32 executables under Irix 6, we have to handle both |
| variants. */ |
| |
| typedef enum |
| { |
| OBJ_LIST_OLD, /* Pre Irix 6.x object list. */ |
| OBJ_LIST_32, /* 32 Bit Elf32_Obj_Info. */ |
| OBJ_LIST_64 /* 64 Bit Elf64_Obj_Info, FIXME not yet implemented. */ |
| } |
| obj_list_variant; |
| |
| /* Define our own link_map structure. |
| This will help to share code with osfsolib.c and solib.c. */ |
| |
| struct link_map |
| { |
| obj_list_variant l_variant; /* which variant of object list */ |
| CORE_ADDR l_lladdr; /* addr in inferior list was read from */ |
| CORE_ADDR l_next; /* address of next object list entry */ |
| }; |
| |
| /* Irix 5 shared objects are pre-linked to particular addresses |
| although the dynamic linker may have to relocate them if the |
| address ranges of the libraries used by the main program clash. |
| The offset is the difference between the address where the object |
| is mapped and the binding address of the shared library. */ |
| #define LM_OFFSET(so) ((so) -> offset) |
| /* Loaded address of shared library. */ |
| #define LM_ADDR(so) ((so) -> lmstart) |
| |
| char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ |
| |
| struct so_list |
| { |
| struct so_list *next; /* next structure in linked list */ |
| struct link_map lm; |
| CORE_ADDR offset; /* prelink to load address offset */ |
| char *so_name; /* shared object lib name */ |
| CORE_ADDR lmstart; /* lower addr bound of mapped object */ |
| CORE_ADDR lmend; /* upper addr bound of mapped object */ |
| char symbols_loaded; /* flag: symbols read in yet? */ |
| char from_tty; /* flag: print msgs? */ |
| struct objfile *objfile; /* objfile for loaded lib */ |
| struct section_table *sections; |
| struct section_table *sections_end; |
| struct section_table *textsection; |
| bfd *abfd; |
| }; |
| |
| static struct so_list *so_list_head; /* List of known shared objects */ |
| static CORE_ADDR debug_base; /* Base of dynamic linker structures */ |
| static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */ |
| |
| /* Local function prototypes */ |
| |
| static void |
| sharedlibrary_command PARAMS ((char *, int)); |
| |
| static int |
| enable_break PARAMS ((void)); |
| |
| static int |
| disable_break PARAMS ((void)); |
| |
| static void |
| info_sharedlibrary_command PARAMS ((char *, int)); |
| |
| static int |
| symbol_add_stub PARAMS ((char *)); |
| |
| static struct so_list * |
| find_solib PARAMS ((struct so_list *)); |
| |
| static struct link_map * |
| first_link_map_member PARAMS ((void)); |
| |
| static struct link_map * |
| next_link_map_member PARAMS ((struct so_list *)); |
| |
| static void |
| xfer_link_map_member PARAMS ((struct so_list *, struct link_map *)); |
| |
| static CORE_ADDR |
| locate_base PARAMS ((void)); |
| |
| static int |
| solib_map_sections PARAMS ((char *)); |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| solib_map_sections -- open bfd and build sections for shared lib |
| |
| SYNOPSIS |
| |
| static int solib_map_sections (struct so_list *so) |
| |
| DESCRIPTION |
| |
| Given a pointer to one of the shared objects in our list |
| of mapped objects, use the recorded name to open a bfd |
| descriptor for the object, build a section table, and then |
| relocate all the section addresses by the base address at |
| which the shared object was mapped. |
| |
| FIXMES |
| |
| In most (all?) cases the shared object file name recorded in the |
| dynamic linkage tables will be a fully qualified pathname. For |
| cases where it isn't, do we really mimic the systems search |
| mechanism correctly in the below code (particularly the tilde |
| expansion stuff?). |
| */ |
| |
| static int |
| solib_map_sections (arg) |
| char *arg; |
| { |
| struct so_list *so = (struct so_list *) arg; /* catch_errors bogon */ |
| char *filename; |
| char *scratch_pathname; |
| int scratch_chan; |
| struct section_table *p; |
| struct cleanup *old_chain; |
| bfd *abfd; |
| |
| filename = tilde_expand (so->so_name); |
| old_chain = make_cleanup (free, filename); |
| |
| scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0, |
| &scratch_pathname); |
| if (scratch_chan < 0) |
| { |
| scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename, |
| O_RDONLY, 0, &scratch_pathname); |
| } |
| if (scratch_chan < 0) |
| { |
| perror_with_name (filename); |
| } |
| /* Leave scratch_pathname allocated. abfd->name will point to it. */ |
| |
| abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); |
| if (!abfd) |
| { |
| close (scratch_chan); |
| error ("Could not open `%s' as an executable file: %s", |
| scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| } |
| /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
| so->abfd = abfd; |
| abfd->cacheable = true; |
| |
| if (!bfd_check_format (abfd, bfd_object)) |
| { |
| error ("\"%s\": not in executable format: %s.", |
| scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| } |
| if (build_section_table (abfd, &so->sections, &so->sections_end)) |
| { |
| error ("Can't find the file sections in `%s': %s", |
| bfd_get_filename (exec_bfd), bfd_errmsg (bfd_get_error ())); |
| } |
| |
| for (p = so->sections; p < so->sections_end; p++) |
| { |
| /* Relocate the section binding addresses as recorded in the shared |
| object's file by the offset to get the address to which the |
| object was actually mapped. */ |
| p->addr += LM_OFFSET (so); |
| p->endaddr += LM_OFFSET (so); |
| so->lmend = (CORE_ADDR) max (p->endaddr, so->lmend); |
| if (STREQ (p->the_bfd_section->name, ".text")) |
| { |
| so->textsection = p; |
| } |
| } |
| |
| /* Free the file names, close the file now. */ |
| do_cleanups (old_chain); |
| |
| return (1); |
| } |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| locate_base -- locate the base address of dynamic linker structs |
| |
| SYNOPSIS |
| |
| CORE_ADDR locate_base (void) |
| |
| DESCRIPTION |
| |
| For both the SunOS and SVR4 shared library implementations, if the |
| inferior executable has been linked dynamically, there is a single |
| address somewhere in the inferior's data space which is the key to |
| locating all of the dynamic linker's runtime structures. This |
| address is the value of the symbol defined by the macro DEBUG_BASE. |
| The job of this function is to find and return that address, or to |
| return 0 if there is no such address (the executable is statically |
| linked for example). |
| |
| For SunOS, the job is almost trivial, since the dynamic linker and |
| all of it's structures are statically linked to the executable at |
| link time. Thus the symbol for the address we are looking for has |
| already been added to the minimal symbol table for the executable's |
| objfile at the time the symbol file's symbols were read, and all we |
| have to do is look it up there. Note that we explicitly do NOT want |
| to find the copies in the shared library. |
| |
| The SVR4 version is much more complicated because the dynamic linker |
| and it's structures are located in the shared C library, which gets |
| run as the executable's "interpreter" by the kernel. We have to go |
| to a lot more work to discover the address of DEBUG_BASE. Because |
| of this complexity, we cache the value we find and return that value |
| on subsequent invocations. Note there is no copy in the executable |
| symbol tables. |
| |
| Irix 5 is basically like SunOS. |
| |
| Note that we can assume nothing about the process state at the time |
| we need to find this address. We may be stopped on the first instruc- |
| tion of the interpreter (C shared library), the first instruction of |
| the executable itself, or somewhere else entirely (if we attached |
| to the process for example). |
| |
| */ |
| |
| static CORE_ADDR |
| locate_base () |
| { |
| struct minimal_symbol *msymbol; |
| CORE_ADDR address = 0; |
| |
| msymbol = lookup_minimal_symbol (DEBUG_BASE, NULL, symfile_objfile); |
| if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0)) |
| { |
| address = SYMBOL_VALUE_ADDRESS (msymbol); |
| } |
| return (address); |
| } |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| first_link_map_member -- locate first member in dynamic linker's map |
| |
| SYNOPSIS |
| |
| static struct link_map *first_link_map_member (void) |
| |
| DESCRIPTION |
| |
| Read in a copy of the first member in the inferior's dynamic |
| link map from the inferior's dynamic linker structures, and return |
| a pointer to the link map descriptor. |
| */ |
| |
| static struct link_map * |
| first_link_map_member () |
| { |
| struct obj_list *listp; |
| struct obj_list list_old; |
| struct link_map *lm; |
| static struct link_map first_lm; |
| CORE_ADDR lladdr; |
| CORE_ADDR next_lladdr; |
| |
| /* We have not already read in the dynamic linking structures |
| from the inferior, lookup the address of the base structure. */ |
| debug_base = locate_base (); |
| if (debug_base == 0) |
| return NULL; |
| |
| /* Get address of first list entry. */ |
| read_memory (debug_base, (char *) &listp, sizeof (struct obj_list *)); |
| |
| if (listp == NULL) |
| return NULL; |
| |
| /* Get first list entry. */ |
| lladdr = (CORE_ADDR) listp; |
| read_memory (lladdr, (char *) &list_old, sizeof (struct obj_list)); |
| |
| /* The first entry in the list is the object file we are debugging, |
| so skip it. */ |
| next_lladdr = (CORE_ADDR) list_old.next; |
| |
| #ifdef HANDLE_NEW_OBJ_LIST |
| if (list_old.data == NEW_OBJ_INFO_MAGIC) |
| { |
| Elf32_Obj_Info list_32; |
| |
| read_memory (lladdr, (char *) &list_32, sizeof (Elf32_Obj_Info)); |
| if (list_32.oi_size != sizeof (Elf32_Obj_Info)) |
| return NULL; |
| next_lladdr = (CORE_ADDR) list_32.oi_next; |
| } |
| #endif |
| |
| if (next_lladdr == 0) |
| return NULL; |
| |
| first_lm.l_lladdr = next_lladdr; |
| lm = &first_lm; |
| return lm; |
| } |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| next_link_map_member -- locate next member in dynamic linker's map |
| |
| SYNOPSIS |
| |
| static struct link_map *next_link_map_member (so_list_ptr) |
| |
| DESCRIPTION |
| |
| Read in a copy of the next member in the inferior's dynamic |
| link map from the inferior's dynamic linker structures, and return |
| a pointer to the link map descriptor. |
| */ |
| |
| static struct link_map * |
| next_link_map_member (so_list_ptr) |
| struct so_list *so_list_ptr; |
| { |
| struct link_map *lm = &so_list_ptr->lm; |
| CORE_ADDR next_lladdr = lm->l_next; |
| static struct link_map next_lm; |
| |
| if (next_lladdr == 0) |
| { |
| /* We have hit the end of the list, so check to see if any were |
| added, but be quiet if we can't read from the target any more. */ |
| int status = 0; |
| |
| if (lm->l_variant == OBJ_LIST_OLD) |
| { |
| struct obj_list list_old; |
| |
| status = target_read_memory (lm->l_lladdr, |
| (char *) &list_old, |
| sizeof (struct obj_list)); |
| next_lladdr = (CORE_ADDR) list_old.next; |
| } |
| #ifdef HANDLE_NEW_OBJ_LIST |
| else if (lm->l_variant == OBJ_LIST_32) |
| { |
| Elf32_Obj_Info list_32; |
| status = target_read_memory (lm->l_lladdr, |
| (char *) &list_32, |
| sizeof (Elf32_Obj_Info)); |
| next_lladdr = (CORE_ADDR) list_32.oi_next; |
| } |
| #endif |
| |
| if (status != 0 || next_lladdr == 0) |
| return NULL; |
| } |
| |
| next_lm.l_lladdr = next_lladdr; |
| lm = &next_lm; |
| return lm; |
| } |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| xfer_link_map_member -- set local variables from dynamic linker's map |
| |
| SYNOPSIS |
| |
| static void xfer_link_map_member (so_list_ptr, lm) |
| |
| DESCRIPTION |
| |
| Read in a copy of the requested member in the inferior's dynamic |
| link map from the inferior's dynamic linker structures, and fill |
| in the necessary so_list_ptr elements. |
| */ |
| |
| static void |
| xfer_link_map_member (so_list_ptr, lm) |
| struct so_list *so_list_ptr; |
| struct link_map *lm; |
| { |
| struct obj_list list_old; |
| CORE_ADDR lladdr = lm->l_lladdr; |
| struct link_map *new_lm = &so_list_ptr->lm; |
| int errcode; |
| |
| read_memory (lladdr, (char *) &list_old, sizeof (struct obj_list)); |
| |
| new_lm->l_variant = OBJ_LIST_OLD; |
| new_lm->l_lladdr = lladdr; |
| new_lm->l_next = (CORE_ADDR) list_old.next; |
| |
| #ifdef HANDLE_NEW_OBJ_LIST |
| if (list_old.data == NEW_OBJ_INFO_MAGIC) |
| { |
| Elf32_Obj_Info list_32; |
| |
| read_memory (lladdr, (char *) &list_32, sizeof (Elf32_Obj_Info)); |
| if (list_32.oi_size != sizeof (Elf32_Obj_Info)) |
| return; |
| new_lm->l_variant = OBJ_LIST_32; |
| new_lm->l_next = (CORE_ADDR) list_32.oi_next; |
| |
| target_read_string ((CORE_ADDR) list_32.oi_pathname, |
| &so_list_ptr->so_name, |
| list_32.oi_pathname_len + 1, &errcode); |
| if (errcode != 0) |
| memory_error (errcode, (CORE_ADDR) list_32.oi_pathname); |
| |
| LM_ADDR (so_list_ptr) = (CORE_ADDR) list_32.oi_ehdr; |
| LM_OFFSET (so_list_ptr) = |
| (CORE_ADDR) list_32.oi_ehdr - (CORE_ADDR) list_32.oi_orig_ehdr; |
| } |
| else |
| #endif |
| { |
| #if defined (_MIPS_SIM_NABI32) && _MIPS_SIM == _MIPS_SIM_NABI32 |
| /* If we are compiling GDB under N32 ABI, the alignments in |
| the obj struct are different from the O32 ABI and we will get |
| wrong values when accessing the struct. |
| As a workaround we use fixed values which are good for |
| Irix 6.2. */ |
| char buf[432]; |
| |
| read_memory ((CORE_ADDR) list_old.data, buf, sizeof (buf)); |
| |
| target_read_string (extract_address (&buf[236], 4), |
| &so_list_ptr->so_name, |
| INT_MAX, &errcode); |
| if (errcode != 0) |
| memory_error (errcode, extract_address (&buf[236], 4)); |
| |
| LM_ADDR (so_list_ptr) = extract_address (&buf[196], 4); |
| LM_OFFSET (so_list_ptr) = |
| extract_address (&buf[196], 4) - extract_address (&buf[248], 4); |
| #else |
| struct obj obj_old; |
| |
| read_memory ((CORE_ADDR) list_old.data, (char *) &obj_old, |
| sizeof (struct obj)); |
| |
| target_read_string ((CORE_ADDR) obj_old.o_path, |
| &so_list_ptr->so_name, |
| INT_MAX, &errcode); |
| if (errcode != 0) |
| memory_error (errcode, (CORE_ADDR) obj_old.o_path); |
| |
| LM_ADDR (so_list_ptr) = (CORE_ADDR) obj_old.o_praw; |
| LM_OFFSET (so_list_ptr) = |
| (CORE_ADDR) obj_old.o_praw - obj_old.o_base_address; |
| #endif |
| } |
| |
| catch_errors (solib_map_sections, (char *) so_list_ptr, |
| "Error while mapping shared library sections:\n", |
| RETURN_MASK_ALL); |
| } |
| |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| find_solib -- step through list of shared objects |
| |
| SYNOPSIS |
| |
| struct so_list *find_solib (struct so_list *so_list_ptr) |
| |
| DESCRIPTION |
| |
| This module contains the routine which finds the names of any |
| loaded "images" in the current process. The argument in must be |
| NULL on the first call, and then the returned value must be passed |
| in on subsequent calls. This provides the capability to "step" down |
| the list of loaded objects. On the last object, a NULL value is |
| returned. |
| */ |
| |
| static struct so_list * |
| find_solib (so_list_ptr) |
| struct so_list *so_list_ptr; /* Last lm or NULL for first one */ |
| { |
| struct so_list *so_list_next = NULL; |
| struct link_map *lm = NULL; |
| struct so_list *new; |
| |
| if (so_list_ptr == NULL) |
| { |
| /* We are setting up for a new scan through the loaded images. */ |
| if ((so_list_next = so_list_head) == NULL) |
| { |
| /* Find the first link map list member. */ |
| lm = first_link_map_member (); |
| } |
| } |
| else |
| { |
| /* We have been called before, and are in the process of walking |
| the shared library list. Advance to the next shared object. */ |
| lm = next_link_map_member (so_list_ptr); |
| so_list_next = so_list_ptr->next; |
| } |
| if ((so_list_next == NULL) && (lm != NULL)) |
| { |
| new = (struct so_list *) xmalloc (sizeof (struct so_list)); |
| memset ((char *) new, 0, sizeof (struct so_list)); |
| /* Add the new node as the next node in the list, or as the root |
| node if this is the first one. */ |
| if (so_list_ptr != NULL) |
| { |
| so_list_ptr->next = new; |
| } |
| else |
| { |
| so_list_head = new; |
| } |
| so_list_next = new; |
| xfer_link_map_member (new, lm); |
| } |
| return (so_list_next); |
| } |
| |
| /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
| |
| static int |
| symbol_add_stub (arg) |
| char *arg; |
| { |
| register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
| CORE_ADDR text_addr = 0; |
| struct section_addr_info section_addrs; |
| |
| memset (§ion_addrs, 0, sizeof (section_addrs)); |
| if (so->textsection) |
| text_addr = so->textsection->addr; |
| else if (so->abfd != NULL) |
| { |
| asection *lowest_sect; |
| |
| /* If we didn't find a mapped non zero sized .text section, set up |
| text_addr so that the relocation in symbol_file_add does no harm. */ |
| |
| lowest_sect = bfd_get_section_by_name (so->abfd, ".text"); |
| if (lowest_sect == NULL) |
| bfd_map_over_sections (so->abfd, find_lowest_section, |
| (PTR) &lowest_sect); |
| if (lowest_sect) |
| text_addr = bfd_section_vma (so->abfd, lowest_sect) + LM_OFFSET (so); |
| } |
| |
| section_addrs.text_addr = text_addr; |
| so->objfile = symbol_file_add (so->so_name, so->from_tty, |
| §ion_addrs, 0, 0); |
| return (1); |
| } |
| |
| /* |
| |
| GLOBAL FUNCTION |
| |
| solib_add -- add a shared library file to the symtab and section list |
| |
| SYNOPSIS |
| |
| void solib_add (char *arg_string, int from_tty, |
| struct target_ops *target) |
| |
| DESCRIPTION |
| |
| */ |
| |
| void |
| solib_add (arg_string, from_tty, target) |
| char *arg_string; |
| int from_tty; |
| struct target_ops *target; |
| { |
| register struct so_list *so = NULL; /* link map state variable */ |
| |
| /* Last shared library that we read. */ |
| struct so_list *so_last = NULL; |
| |
| char *re_err; |
| int count; |
| int old; |
| |
| if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL) |
| { |
| error ("Invalid regexp: %s", re_err); |
| } |
| |
| /* Add the shared library sections to the section table of the |
| specified target, if any. */ |
| if (target) |
| { |
| /* Count how many new section_table entries there are. */ |
| so = NULL; |
| count = 0; |
| while ((so = find_solib (so)) != NULL) |
| { |
| if (so->so_name[0]) |
| { |
| count += so->sections_end - so->sections; |
| } |
| } |
| |
| if (count) |
| { |
| old = target_resize_to_sections (target, count); |
| |
| /* Add these section table entries to the target's table. */ |
| while ((so = find_solib (so)) != NULL) |
| { |
| if (so->so_name[0]) |
| { |
| count = so->sections_end - so->sections; |
| memcpy ((char *) (target->to_sections + old), |
| so->sections, |
| (sizeof (struct section_table)) * count); |
| old += count; |
| } |
| } |
| } |
| } |
| |
| /* Now add the symbol files. */ |
| while ((so = find_solib (so)) != NULL) |
| { |
| if (so->so_name[0] && re_exec (so->so_name)) |
| { |
| so->from_tty = from_tty; |
| if (so->symbols_loaded) |
| { |
| if (from_tty) |
| { |
| printf_unfiltered ("Symbols already loaded for %s\n", so->so_name); |
| } |
| } |
| else if (catch_errors |
| (symbol_add_stub, (char *) so, |
| "Error while reading shared library symbols:\n", |
| RETURN_MASK_ALL)) |
| { |
| so_last = so; |
| so->symbols_loaded = 1; |
| } |
| } |
| } |
| |
| /* Getting new symbols may change our opinion about what is |
| frameless. */ |
| if (so_last) |
| reinit_frame_cache (); |
| } |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| info_sharedlibrary_command -- code for "info sharedlibrary" |
| |
| SYNOPSIS |
| |
| static void info_sharedlibrary_command () |
| |
| DESCRIPTION |
| |
| Walk through the shared library list and print information |
| about each attached library. |
| */ |
| |
| static void |
| info_sharedlibrary_command (ignore, from_tty) |
| char *ignore; |
| int from_tty; |
| { |
| register struct so_list *so = NULL; /* link map state variable */ |
| int header_done = 0; |
| |
| if (exec_bfd == NULL) |
| { |
| printf_unfiltered ("No executable file.\n"); |
| return; |
| } |
| while ((so = find_solib (so)) != NULL) |
| { |
| if (so->so_name[0]) |
| { |
| if (!header_done) |
| { |
| printf_unfiltered ("%-12s%-12s%-12s%s\n", "From", "To", "Syms Read", |
| "Shared Object Library"); |
| header_done++; |
| } |
| printf_unfiltered ("%-12s", |
| local_hex_string_custom ((unsigned long) LM_ADDR (so), |
| "08l")); |
| printf_unfiltered ("%-12s", |
| local_hex_string_custom ((unsigned long) so->lmend, |
| "08l")); |
| printf_unfiltered ("%-12s", so->symbols_loaded ? "Yes" : "No"); |
| printf_unfiltered ("%s\n", so->so_name); |
| } |
| } |
| if (so_list_head == NULL) |
| { |
| printf_unfiltered ("No shared libraries loaded at this time.\n"); |
| } |
| } |
| |
| /* |
| |
| GLOBAL FUNCTION |
| |
| solib_address -- check to see if an address is in a shared lib |
| |
| SYNOPSIS |
| |
| char *solib_address (CORE_ADDR address) |
| |
| DESCRIPTION |
| |
| Provides a hook for other gdb routines to discover whether or |
| not a particular address is within the mapped address space of |
| a shared library. Any address between the base mapping address |
| and the first address beyond the end of the last mapping, is |
| considered to be within the shared library address space, for |
| our purposes. |
| |
| For example, this routine is called at one point to disable |
| breakpoints which are in shared libraries that are not currently |
| mapped in. |
| */ |
| |
| char * |
| solib_address (address) |
| CORE_ADDR address; |
| { |
| register struct so_list *so = 0; /* link map state variable */ |
| |
| while ((so = find_solib (so)) != NULL) |
| { |
| if (so->so_name[0]) |
| { |
| if ((address >= (CORE_ADDR) LM_ADDR (so)) && |
| (address < (CORE_ADDR) so->lmend)) |
| return (so->so_name); |
| } |
| } |
| return (0); |
| } |
| |
| /* Called by free_all_symtabs */ |
| |
| void |
| clear_solib () |
| { |
| struct so_list *next; |
| char *bfd_filename; |
| |
| disable_breakpoints_in_shlibs (1); |
| |
| while (so_list_head) |
| { |
| if (so_list_head->sections) |
| { |
| free ((PTR) so_list_head->sections); |
| } |
| if (so_list_head->abfd) |
| { |
| bfd_filename = bfd_get_filename (so_list_head->abfd); |
| if (!bfd_close (so_list_head->abfd)) |
| warning ("cannot close \"%s\": %s", |
| bfd_filename, bfd_errmsg (bfd_get_error ())); |
| } |
| else |
| /* This happens for the executable on SVR4. */ |
| bfd_filename = NULL; |
| |
| next = so_list_head->next; |
| if (bfd_filename) |
| free ((PTR) bfd_filename); |
| free (so_list_head->so_name); |
| free ((PTR) so_list_head); |
| so_list_head = next; |
| } |
| debug_base = 0; |
| } |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| disable_break -- remove the "mapping changed" breakpoint |
| |
| SYNOPSIS |
| |
| static int disable_break () |
| |
| DESCRIPTION |
| |
| Removes the breakpoint that gets hit when the dynamic linker |
| completes a mapping change. |
| |
| */ |
| |
| static int |
| disable_break () |
| { |
| int status = 1; |
| |
| |
| /* Note that breakpoint address and original contents are in our address |
| space, so we just need to write the original contents back. */ |
| |
| if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0) |
| { |
| status = 0; |
| } |
| |
| /* For the SVR4 version, we always know the breakpoint address. For the |
| SunOS version we don't know it until the above code is executed. |
| Grumble if we are stopped anywhere besides the breakpoint address. */ |
| |
| if (stop_pc != breakpoint_addr) |
| { |
| warning ("stopped at unknown breakpoint while handling shared libraries"); |
| } |
| |
| return (status); |
| } |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| enable_break -- arrange for dynamic linker to hit breakpoint |
| |
| SYNOPSIS |
| |
| int enable_break (void) |
| |
| DESCRIPTION |
| |
| This functions inserts a breakpoint at the entry point of the |
| main executable, where all shared libraries are mapped in. |
| */ |
| |
| static int |
| enable_break () |
| { |
| if (symfile_objfile != NULL |
| && target_insert_breakpoint (symfile_objfile->ei.entry_point, |
| shadow_contents) == 0) |
| { |
| breakpoint_addr = symfile_objfile->ei.entry_point; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| |
| GLOBAL FUNCTION |
| |
| solib_create_inferior_hook -- shared library startup support |
| |
| SYNOPSIS |
| |
| void solib_create_inferior_hook() |
| |
| DESCRIPTION |
| |
| When gdb starts up the inferior, it nurses it along (through the |
| shell) until it is ready to execute it's first instruction. At this |
| point, this function gets called via expansion of the macro |
| SOLIB_CREATE_INFERIOR_HOOK. |
| |
| For SunOS executables, this first instruction is typically the |
| one at "_start", or a similar text label, regardless of whether |
| the executable is statically or dynamically linked. The runtime |
| startup code takes care of dynamically linking in any shared |
| libraries, once gdb allows the inferior to continue. |
| |
| For SVR4 executables, this first instruction is either the first |
| instruction in the dynamic linker (for dynamically linked |
| executables) or the instruction at "start" for statically linked |
| executables. For dynamically linked executables, the system |
| first exec's /lib/libc.so.N, which contains the dynamic linker, |
| and starts it running. The dynamic linker maps in any needed |
| shared libraries, maps in the actual user executable, and then |
| jumps to "start" in the user executable. |
| |
| For both SunOS shared libraries, and SVR4 shared libraries, we |
| can arrange to cooperate with the dynamic linker to discover the |
| names of shared libraries that are dynamically linked, and the |
| base addresses to which they are linked. |
| |
| This function is responsible for discovering those names and |
| addresses, and saving sufficient information about them to allow |
| their symbols to be read at a later time. |
| |
| FIXME |
| |
| Between enable_break() and disable_break(), this code does not |
| properly handle hitting breakpoints which the user might have |
| set in the startup code or in the dynamic linker itself. Proper |
| handling will probably have to wait until the implementation is |
| changed to use the "breakpoint handler function" method. |
| |
| Also, what if child has exit()ed? Must exit loop somehow. |
| */ |
| |
| void |
| solib_create_inferior_hook () |
| { |
| if (!enable_break ()) |
| { |
| warning ("shared library handler failed to enable breakpoint"); |
| return; |
| } |
| |
| /* Now run the target. It will eventually hit the breakpoint, at |
| which point all of the libraries will have been mapped in and we |
| can go groveling around in the dynamic linker structures to find |
| out what we need to know about them. */ |
| |
| clear_proceed_status (); |
| stop_soon_quietly = 1; |
| stop_signal = TARGET_SIGNAL_0; |
| do |
| { |
| target_resume (-1, 0, stop_signal); |
| wait_for_inferior (); |
| } |
| while (stop_signal != TARGET_SIGNAL_TRAP); |
| |
| /* We are now either at the "mapping complete" breakpoint (or somewhere |
| else, a condition we aren't prepared to deal with anyway), so adjust |
| the PC as necessary after a breakpoint, disable the breakpoint, and |
| add any shared libraries that were mapped in. */ |
| |
| if (DECR_PC_AFTER_BREAK) |
| { |
| stop_pc -= DECR_PC_AFTER_BREAK; |
| write_register (PC_REGNUM, stop_pc); |
| } |
| |
| if (!disable_break ()) |
| { |
| warning ("shared library handler failed to disable breakpoint"); |
| } |
| |
| /* solib_add will call reinit_frame_cache. |
| But we are stopped in the startup code and we might not have symbols |
| for the startup code, so heuristic_proc_start could be called |
| and will put out an annoying warning. |
| Delaying the resetting of stop_soon_quietly until after symbol loading |
| suppresses the warning. */ |
| if (auto_solib_add) |
| solib_add ((char *) 0, 0, (struct target_ops *) 0); |
| stop_soon_quietly = 0; |
| } |
| |
| /* |
| |
| LOCAL FUNCTION |
| |
| sharedlibrary_command -- handle command to explicitly add library |
| |
| SYNOPSIS |
| |
| static void sharedlibrary_command (char *args, int from_tty) |
| |
| DESCRIPTION |
| |
| */ |
| |
| static void |
| sharedlibrary_command (args, from_tty) |
| char *args; |
| int from_tty; |
| { |
| dont_repeat (); |
| solib_add (args, from_tty, (struct target_ops *) 0); |
| } |
| |
| void |
| _initialize_solib () |
| { |
| add_com ("sharedlibrary", class_files, sharedlibrary_command, |
| "Load shared object library symbols for files matching REGEXP."); |
| add_info ("sharedlibrary", info_sharedlibrary_command, |
| "Status of loaded shared object libraries."); |
| |
| add_show_from_set |
| (add_set_cmd ("auto-solib-add", class_support, var_zinteger, |
| (char *) &auto_solib_add, |
| "Set autoloading of shared library symbols.\n\ |
| If nonzero, symbols from all shared object libraries will be loaded\n\ |
| automatically when the inferior begins execution or when the dynamic linker\n\ |
| informs gdb that a new library has been loaded. Otherwise, symbols\n\ |
| must be loaded manually, using `sharedlibrary'.", |
| &setlist), |
| &showlist); |
| } |
| |
| |
| /* Register that we are able to handle irix5 core file formats. |
| This really is bfd_target_unknown_flavour */ |
| |
| static struct core_fns irix5_core_fns = |
| { |
| bfd_target_unknown_flavour, /* core_flavour */ |
| default_check_format, /* check_format */ |
| default_core_sniffer, /* core_sniffer */ |
| fetch_core_registers, /* core_read_registers */ |
| NULL /* next */ |
| }; |
| |
| void |
| _initialize_core_irix5 () |
| { |
| add_core_fns (&irix5_core_fns); |
| } |