X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;ds=sidebyside;f=gdb%2Frs6000-nat.c;h=6afb4cf76c0e9ed2168ce5ec5e6b48db2fd48940;hb=597f589d01ce29495bf7b5b23e758bb5a0e18433;hp=a5fec6cb8351da088efc1d42dba5e19455c9bba2;hpb=fbc3f1913d26d4b559cd51061444718a172b094a;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/rs6000-nat.c b/gdb/rs6000-nat.c index a5fec6cb83..6afb4cf76c 100644 --- a/gdb/rs6000-nat.c +++ b/gdb/rs6000-nat.c @@ -1,21 +1,23 @@ /* IBM RS/6000 native-dependent code for GDB, the GNU debugger. - Copyright 1986, 1987, 1989, 1991, 1992, 1994 Free Software Foundation, Inc. + Copyright 1986, 1987, 1989, 1991, 1992, 1994, 1995, 1996, 1997, 1998 + Free Software Foundation, Inc. -This file is part of GDB. + 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 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. + 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. */ + 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" @@ -24,7 +26,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "xcoffsolib.h" #include "symfile.h" #include "objfiles.h" -#include "libbfd.h" /* For bfd_cache_lookup (FIXME) */ +#include "libbfd.h" /* For bfd_cache_lookup (FIXME) */ #include "bfd.h" #include "gdb-stabs.h" @@ -37,186 +39,417 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include +#include #include #include #include "gdb_stat.h" #include +#define __LDINFO_PTRACE32__ /* for __ld_info32 */ +#define __LDINFO_PTRACE64__ /* for __ld_info64 */ #include +#include -extern int errno; +/* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for + debugging 32-bit and 64-bit processes. Define a typedef and macros for + accessing fields in the appropriate structures. */ -extern struct vmap * map_vmap PARAMS ((bfd *bf, bfd *arch)); +/* In 32-bit compilation mode (which is the only mode from which ptrace() + works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */ + +#ifdef __ld_info32 +# define ARCH3264 +#endif + +/* Return whether the current architecture is 64-bit. */ + +#ifndef ARCH3264 +# define ARCH64() 0 +#else +# define ARCH64() (REGISTER_RAW_SIZE (0) == 8) +#endif + +/* Union of 32-bit and 64-bit ".reg" core file sections. */ + +typedef union { +#ifdef ARCH3264 + struct __context64 r64; +#else + struct mstsave r64; +#endif + struct mstsave r32; +} CoreRegs; + +/* Union of 32-bit and 64-bit versions of ld_info. */ + +typedef union { +#ifndef ARCH3264 + struct ld_info l32; + struct ld_info l64; +#else + struct __ld_info32 l32; + struct __ld_info64 l64; +#endif +} LdInfo; + +/* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x), + declare and initialize a variable named VAR suitable for use as the arch64 + parameter to the various LDI_*() macros. */ + +#ifndef ARCH3264 +# define ARCH64_DECL(var) +#else +# define ARCH64_DECL(var) int var = ARCH64 () +#endif + +/* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process + otherwise. This technique only works for FIELDs with the same data type in + 32-bit and 64-bit versions of ld_info. */ + +#ifndef ARCH3264 +# define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field +#else +# define LDI_FIELD(ldi, arch64, field) \ + (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field) +#endif + +/* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit + process otherwise. */ + +#define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next) +#define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd) +#define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename) + +extern struct vmap *map_vmap (bfd * bf, bfd * arch); extern struct target_ops exec_ops; -static void -exec_one_dummy_insn PARAMS ((void)); +static void vmap_exec (void); -extern void -add_text_to_loadinfo PARAMS ((CORE_ADDR textaddr, CORE_ADDR dataaddr)); +static void vmap_ldinfo (LdInfo *); + +static struct vmap *add_vmap (LdInfo *); + +static int objfile_symbol_add (void *); + +static void vmap_symtab (struct vmap *); + +static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); + +static void exec_one_dummy_insn (void); extern void -fixup_breakpoints PARAMS ((CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta)); +fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta); -/* Conversion from gdb-to-system special purpose register numbers.. */ +/* Conversion from gdb-to-system special purpose register numbers. */ -static int special_regs[] = { - IAR, /* PC_REGNUM */ - MSR, /* PS_REGNUM */ - CR, /* CR_REGNUM */ - LR, /* LR_REGNUM */ - CTR, /* CTR_REGNUM */ +static int special_regs[] = +{ + IAR, /* PC_REGNUM */ + MSR, /* PS_REGNUM */ + CR, /* CR_REGNUM */ + LR, /* LR_REGNUM */ + CTR, /* CTR_REGNUM */ XER, /* XER_REGNUM */ - MQ /* MQ_REGNUM */ + MQ /* MQ_REGNUM */ }; -void -fetch_inferior_registers (regno) - int regno; +/* Call ptrace(REQ, ID, ADDR, DATA, BUF). */ + +static int +ptrace32 (int req, int id, int *addr, int data, int *buf) { - int ii; - extern char registers[]; + int ret = ptrace (req, id, (int *)addr, data, buf); +#if 0 + printf ("ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n", + req, id, (unsigned int)addr, data, (unsigned int)buf, ret); +#endif + return ret; +} - if (regno < 0) { /* for all registers */ +/* Call ptracex(REQ, ID, ADDR, DATA, BUF). */ - /* read 32 general purpose registers. */ +static int +ptrace64 (int req, int id, long long addr, int data, int *buf) +{ +#ifdef ARCH3264 + int ret = ptracex (req, id, addr, data, buf); +#else + int ret = 0; +#endif +#if 0 + printf ("ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n", + req, id, addr, data, (unsigned int)buf, ret); +#endif + return ret; +} - for (ii=0; ii < 32; ++ii) - *(int*)®isters[REGISTER_BYTE (ii)] = - ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, 0, 0); +/* Fetch register REGNO from the inferior. */ - /* read general purpose floating point registers. */ +static void +fetch_register (int regno) +{ + int *addr = (int *) ®isters[REGISTER_BYTE (regno)]; + int nr; - for (ii=0; ii < 32; ++ii) - ptrace (PT_READ_FPR, inferior_pid, - (PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (FP0_REGNUM+ii)], - FPR0+ii, 0); + /* Retrieved values may be -1, so infer errors from errno. */ + errno = 0; - /* read special registers. */ - for (ii=0; ii <= LAST_SP_REGNUM-FIRST_SP_REGNUM; ++ii) - *(int*)®isters[REGISTER_BYTE (FIRST_SP_REGNUM+ii)] = - ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) special_regs[ii], - 0, 0); + /* Floating-point registers. */ + if (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM) + { + nr = regno - FP0_REGNUM + FPR0; + ptrace32 (PT_READ_FPR, inferior_pid, addr, nr, 0); + } - registers_fetched (); - return; - } - - /* else an individual register is addressed. */ - - else if (regno < FP0_REGNUM) { /* a GPR */ - *(int*)®isters[REGISTER_BYTE (regno)] = - ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno, 0, 0); - } - else if (regno <= FPLAST_REGNUM) { /* a FPR */ - ptrace (PT_READ_FPR, inferior_pid, - (PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (regno)], - (regno-FP0_REGNUM+FPR0), 0); - } - else if (regno <= LAST_SP_REGNUM) { /* a special register */ - *(int*)®isters[REGISTER_BYTE (regno)] = - ptrace (PT_READ_GPR, inferior_pid, - (PTRACE_ARG3_TYPE) special_regs[regno-FIRST_SP_REGNUM], 0, 0); - } + /* Bogus register number. */ + else if (regno > LAST_UISA_SP_REGNUM) + fprintf_unfiltered (gdb_stderr, + "gdb error: register no %d not implemented.\n", + regno); + + /* Fixed-point registers. */ else - fprintf_unfiltered (gdb_stderr, "gdb error: register no %d not implemented.\n", regno); + { + if (regno >= FIRST_UISA_SP_REGNUM) + nr = special_regs[regno - FIRST_UISA_SP_REGNUM]; + else + nr = regno; - register_valid [regno] = 1; + if (!ARCH64 ()) + *addr = ptrace32 (PT_READ_GPR, inferior_pid, (int *)nr, 0, 0); + else + { + /* PT_READ_GPR requires the buffer parameter to point to long long, + even if the register is really only 32 bits. */ + long long buf; + ptrace64 (PT_READ_GPR, inferior_pid, nr, 0, (int *)&buf); + if (REGISTER_RAW_SIZE (regno) == 8) + memcpy (addr, &buf, 8); + else + *addr = buf; + } + } + + if (!errno) + register_valid[regno] = 1; + else + { +#if 0 + /* FIXME: this happens 3 times at the start of each 64-bit program. */ + perror ("ptrace read"); +#endif + errno = 0; + } } -/* Store our register values back into the inferior. - If REGNO is -1, do this for all registers. - Otherwise, REGNO specifies which register (so we can save time). */ +/* Store register REGNO back into the inferior. */ -void -store_inferior_registers (regno) - int regno; +static void +store_register (int regno) { - extern char registers[]; + int *addr = (int *) ®isters[REGISTER_BYTE (regno)]; + int nr; + /* -1 can be a successful return value, so infer errors from errno. */ errno = 0; - if (regno == -1) - { /* for all registers.. */ - int ii; - - /* execute one dummy instruction (which is a breakpoint) in inferior - process. So give kernel a chance to do internal house keeping. - Otherwise the following ptrace(2) calls will mess up user stack - since kernel will get confused about the bottom of the stack (%sp) */ - - exec_one_dummy_insn (); + /* Floating-point registers. */ + if (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM) + { + nr = regno - FP0_REGNUM + FPR0; + ptrace32 (PT_WRITE_FPR, inferior_pid, addr, nr, 0); + } - /* write general purpose registers first! */ - for ( ii=GPR0; ii<=GPR31; ++ii) - { - ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, - *(int*)®isters[REGISTER_BYTE (ii)], 0); - if (errno) - { - perror ("ptrace write_gpr"); - errno = 0; - } - } + /* Bogus register number. */ + else if (regno > LAST_UISA_SP_REGNUM) + { + if (regno >= NUM_REGS) + fprintf_unfiltered (gdb_stderr, + "gdb error: register no %d not implemented.\n", + regno); + } - /* write floating point registers now. */ - for ( ii=0; ii < 32; ++ii) - { - ptrace (PT_WRITE_FPR, inferior_pid, - (PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (FP0_REGNUM+ii)], - FPR0+ii, 0); - if (errno) - { - perror ("ptrace write_fpr"); - errno = 0; - } - } + /* Fixed-point registers. */ + else + { + if (regno == SP_REGNUM) + /* Execute one dummy instruction (which is a breakpoint) in inferior + process to give kernel a chance to do internal housekeeping. + Otherwise the following ptrace(2) calls will mess up user stack + since kernel will get confused about the bottom of the stack + (%sp). */ + exec_one_dummy_insn (); + + if (regno >= FIRST_UISA_SP_REGNUM) + nr = special_regs[regno - FIRST_UISA_SP_REGNUM]; + else + nr = regno; - /* write special registers. */ - for (ii=0; ii <= LAST_SP_REGNUM-FIRST_SP_REGNUM; ++ii) + if (!ARCH64 ()) + ptrace32 (PT_WRITE_GPR, inferior_pid, (int *)nr, *addr, 0); + else { - ptrace (PT_WRITE_GPR, inferior_pid, - (PTRACE_ARG3_TYPE) special_regs[ii], - *(int*)®isters[REGISTER_BYTE (FIRST_SP_REGNUM+ii)], 0); - if (errno) - { - perror ("ptrace write_gpr"); - errno = 0; - } + /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte + area, even if the register is really only 32 bits. */ + long long buf; + if (REGISTER_RAW_SIZE (regno) == 8) + memcpy (&buf, addr, 8); + else + buf = *addr; + ptrace64 (PT_WRITE_GPR, inferior_pid, nr, 0, (int *)&buf); } } - /* else, a specific register number is given... */ - - else if (regno < FP0_REGNUM) /* a GPR */ + if (errno) { - ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno, - *(int*)®isters[REGISTER_BYTE (regno)], 0); + perror ("ptrace write"); + errno = 0; } +} + +/* Read from the inferior all registers if REGNO == -1 and just register + REGNO otherwise. */ + +void +fetch_inferior_registers (int regno) +{ + if (regno != -1) + fetch_register (regno); - else if (regno <= FPLAST_REGNUM) /* a FPR */ + else { - ptrace (PT_WRITE_FPR, inferior_pid, - (PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (regno)], - regno - FP0_REGNUM + FPR0, 0); + /* read 32 general purpose registers. */ + for (regno = 0; regno < 32; regno++) + fetch_register (regno); + + /* read general purpose floating point registers. */ + for (regno = FP0_REGNUM; regno <= FPLAST_REGNUM; regno++) + fetch_register (regno); + + /* read special registers. */ + for (regno = FIRST_UISA_SP_REGNUM; regno <= LAST_UISA_SP_REGNUM; regno++) + fetch_register (regno); } +} + +/* Store our register values back into the inferior. + If REGNO is -1, do this for all registers. + Otherwise, REGNO specifies which register (so we can save time). */ - else if (regno <= LAST_SP_REGNUM) /* a special register */ +void +store_inferior_registers (int regno) +{ + if (regno != -1) + store_register (regno); + + else { - ptrace (PT_WRITE_GPR, inferior_pid, - (PTRACE_ARG3_TYPE) special_regs [regno-FIRST_SP_REGNUM], - *(int*)®isters[REGISTER_BYTE (regno)], 0); + /* write general purpose registers first! */ + for (regno = GPR0; regno <= GPR31; regno++) + store_register (regno); + + /* write floating point registers now. */ + for (regno = FP0_REGNUM; regno <= FPLAST_REGNUM; regno++) + store_register (regno); + + /* write special registers. */ + + for (regno = FIRST_UISA_SP_REGNUM; regno <= LAST_UISA_SP_REGNUM; regno++) + store_register (regno); } +} + +/* Store in *TO the 32-bit word at 32-bit-aligned ADDR in the child + process, which is 64-bit if ARCH64 and 32-bit otherwise. Return + success. */ +static int +read_word (CORE_ADDR from, int *to, int arch64) +{ + /* Retrieved values may be -1, so infer errors from errno. */ + errno = 0; + + if (arch64) + *to = ptrace64 (PT_READ_I, inferior_pid, from, 0, NULL); else - fprintf_unfiltered (gdb_stderr, "Gdb error: register no %d not implemented.\n", regno); + *to = ptrace32 (PT_READ_I, inferior_pid, (int *)(long) from, 0, NULL); - if (errno) + return !errno; +} + +/* Copy LEN bytes to or from inferior's memory starting at MEMADDR + to debugger memory starting at MYADDR. Copy to inferior if + WRITE is nonzero. + + Returns the length copied, which is either the LEN argument or zero. + This xfer function does not do partial moves, since child_ops + doesn't allow memory operations to cross below us in the target stack + anyway. */ + +int +child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, + int write, struct target_ops *target) +{ + /* Round starting address down to 32-bit word boundary. */ + int mask = sizeof (int) - 1; + CORE_ADDR addr = memaddr & ~(CORE_ADDR)mask; + + /* Round ending address up to 32-bit word boundary. */ + int count = ((memaddr + len - addr + mask) & ~(CORE_ADDR)mask) + / sizeof (int); + + /* Allocate word transfer buffer. */ + int *buf = (int *) alloca (count * sizeof (int)); + + int arch64 = ARCH64 (); + int i; + + if (!write) { - perror ("ptrace write"); - errno = 0; + /* Retrieve memory a word at a time. */ + for (i = 0; i < count; i++, addr += sizeof (int)) + { + if (!read_word (addr, buf + i, arch64)) + return 0; + QUIT; + } + + /* Copy memory to supplied buffer. */ + addr -= count * sizeof (int); + memcpy (myaddr, (char *)buf + (memaddr - addr), len); } + else + { + /* Fetch leading memory needed for alignment. */ + if (addr < memaddr) + if (!read_word (addr, buf, arch64)) + return 0; + + /* Fetch trailing memory needed for alignment. */ + if (addr + count * sizeof (int) > memaddr + len) + if (!read_word (addr, buf + count - 1, arch64)) + return 0; + + /* Copy supplied data into memory buffer. */ + memcpy ((char *)buf + (memaddr - addr), myaddr, len); + + /* Store memory one word at a time. */ + for (i = 0, errno = 0; i < count; i++, addr += sizeof (int)) + { + if (arch64) + ptrace64 (PT_WRITE_D, inferior_pid, addr, buf[i], NULL); + else + ptrace32 (PT_WRITE_D, inferior_pid, (int *)(long) addr, + buf[i], NULL); + + if (errno) + return 0; + QUIT; + } + } + + return len; } /* Execute one dummy breakpoint instruction. This way we give the kernel @@ -224,103 +457,165 @@ store_inferior_registers (regno) including u_area. */ static void -exec_one_dummy_insn () +exec_one_dummy_insn (void) { #define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200 - char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ - unsigned int status, pid; + char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ + int ret, status, pid; + CORE_ADDR prev_pc; - /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We assume that - this address will never be executed again by the real code. */ + /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We + assume that this address will never be executed again by the real + code. */ target_insert_breakpoint (DUMMY_INSN_ADDR, shadow_contents); - errno = 0; - ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE) DUMMY_INSN_ADDR, 0, 0); - if (errno) + /* You might think this could be done with a single ptrace call, and + you'd be correct for just about every platform I've ever worked + on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up -- + the inferior never hits the breakpoint (it's also worth noting + powerpc-ibm-aix4.1.3 works correctly). */ + prev_pc = read_pc (); + write_pc (DUMMY_INSN_ADDR); + if (ARCH64 ()) + ret = ptrace64 (PT_CONTINUE, inferior_pid, 1, 0, NULL); + else + ret = ptrace32 (PT_CONTINUE, inferior_pid, (int *)1, 0, NULL); + + if (ret != 0) perror ("pt_continue"); - do { - pid = wait (&status); - } while (pid != inferior_pid); - + do + { + pid = wait (&status); + } + while (pid != inferior_pid); + + write_pc (prev_pc); target_remove_breakpoint (DUMMY_INSN_ADDR, shadow_contents); } -void -fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) - char *core_reg_sect; - unsigned core_reg_size; - int which; - unsigned int reg_addr; /* Unused in this version */ +/* Fetch registers from the register section in core bfd. */ + +static void +fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, + int which, CORE_ADDR reg_addr) { - /* fetch GPRs and special registers from the first register section - in core bfd. */ - if (which == 0) + CoreRegs *regs; + double *fprs; + int arch64, i, size; + void *gprs, *sprs[7]; + + if (which != 0) { - /* copy GPRs first. */ - memcpy (registers, core_reg_sect, 32 * 4); - - /* gdb's internal register template and bfd's register section layout - should share a common include file. FIXMEmgo */ - /* then comes special registes. They are supposed to be in the same - order in gdb template and bfd `.reg' section. */ - core_reg_sect += (32 * 4); - memcpy (®isters [REGISTER_BYTE (FIRST_SP_REGNUM)], core_reg_sect, - (LAST_SP_REGNUM - FIRST_SP_REGNUM + 1) * 4); + fprintf_unfiltered + (gdb_stderr, + "Gdb error: unknown parameter to fetch_core_registers().\n"); + return; } - /* fetch floating point registers from register section 2 in core bfd. */ - else if (which == 2) - memcpy (®isters [REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 32 * 8); + arch64 = ARCH64 (); + regs = (CoreRegs *) core_reg_sect; + /* Retrieve register pointers. */ + + if (arch64) + { + gprs = regs->r64.gpr; + fprs = regs->r64.fpr; + sprs[0] = ®s->r64.iar; + sprs[1] = ®s->r64.msr; + sprs[2] = ®s->r64.cr; + sprs[3] = ®s->r64.lr; + sprs[4] = ®s->r64.ctr; + sprs[5] = ®s->r64.xer; + } else - fprintf_unfiltered (gdb_stderr, "Gdb error: unknown parameter to fetch_core_registers().\n"); + { + gprs = regs->r32.gpr; + fprs = regs->r32.fpr; + sprs[0] = ®s->r32.iar; + sprs[1] = ®s->r32.msr; + sprs[2] = ®s->r32.cr; + sprs[3] = ®s->r32.lr; + sprs[4] = ®s->r32.ctr; + sprs[5] = ®s->r32.xer; + sprs[6] = ®s->r32.mq; + } + + /* Copy from pointers to registers[]. */ + + memcpy (registers, gprs, 32 * (arch64 ? 8 : 4)); + memcpy (registers + REGISTER_BYTE (FP0_REGNUM), fprs, 32 * 8); + for (i = FIRST_UISA_SP_REGNUM; i <= LAST_UISA_SP_REGNUM; i++) + { + size = REGISTER_RAW_SIZE (i); + if (size) + memcpy (registers + REGISTER_BYTE (i), + sprs[i - FIRST_UISA_SP_REGNUM], size); + } } + +/* Copy information about text and data sections from LDI to VP for a 64-bit + process if ARCH64 and for a 32-bit process otherwise. */ + +static void +vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64) +{ + if (arch64) + { + vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg; + vp->tend = vp->tstart + ldi->l64.ldinfo_textsize; + vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg; + vp->dend = vp->dstart + ldi->l64.ldinfo_datasize; + } + else + { + vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg; + vp->tend = vp->tstart + ldi->l32.ldinfo_textsize; + vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg; + vp->dend = vp->dstart + ldi->l32.ldinfo_datasize; + } + + /* The run time loader maps the file header in addition to the text + section and returns a pointer to the header in ldinfo_textorg. + Adjust the text start address to point to the real start address + of the text section. */ + vp->tstart += vp->toffs; +} + /* handle symbol translation on vmapping */ static void -vmap_symtab (vp) - register struct vmap *vp; +vmap_symtab (struct vmap *vp) { register struct objfile *objfile; - CORE_ADDR text_delta; - CORE_ADDR data_delta; - CORE_ADDR bss_delta; struct section_offsets *new_offsets; int i; - + objfile = vp->objfile; if (objfile == NULL) { /* OK, it's not an objfile we opened ourselves. - Currently, that can only happen with the exec file, so - relocate the symbols for the symfile. */ + Currently, that can only happen with the exec file, so + relocate the symbols for the symfile. */ if (symfile_objfile == NULL) return; objfile = symfile_objfile; } - new_offsets = alloca - (sizeof (struct section_offsets) - + sizeof (new_offsets->offsets) * objfile->num_sections); + new_offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); for (i = 0; i < objfile->num_sections; ++i) ANOFFSET (new_offsets, i) = ANOFFSET (objfile->section_offsets, i); - - text_delta = - vp->tstart - ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT); - ANOFFSET (new_offsets, SECT_OFF_TEXT) = vp->tstart; - - data_delta = - vp->dstart - ANOFFSET (objfile->section_offsets, SECT_OFF_DATA); - ANOFFSET (new_offsets, SECT_OFF_DATA) = vp->dstart; - - bss_delta = - vp->dstart - ANOFFSET (objfile->section_offsets, SECT_OFF_BSS); - ANOFFSET (new_offsets, SECT_OFF_BSS) = vp->dstart; + + /* The symbols in the object file are linked to the VMA of the section, + relocate them VMA relative. */ + ANOFFSET (new_offsets, SECT_OFF_TEXT (objfile)) = vp->tstart - vp->tvma; + ANOFFSET (new_offsets, SECT_OFF_DATA (objfile)) = vp->dstart - vp->dvma; + ANOFFSET (new_offsets, SECT_OFF_BSS (objfile)) = vp->dstart - vp->dvma; objfile_relocate (objfile, new_offsets); } @@ -328,12 +623,11 @@ vmap_symtab (vp) /* Add symbols for an objfile. */ static int -objfile_symbol_add (arg) - char *arg; +objfile_symbol_add (void *arg) { struct objfile *obj = (struct objfile *) arg; - syms_from_objfile (obj, 0, 0, 0); + syms_from_objfile (obj, NULL, 0, 0); new_symfile_objfile (obj, 0, 0); return 1; } @@ -346,28 +640,31 @@ objfile_symbol_add (arg) Return the vmap new entry. */ static struct vmap * -add_vmap (ldi) - register struct ld_info *ldi; +add_vmap (LdInfo *ldi) { bfd *abfd, *last; - register char *mem, *objname; + register char *mem, *objname, *filename; struct objfile *obj; struct vmap *vp; + int fd; + ARCH64_DECL (arch64); /* This ldi structure was allocated using alloca() in xcoff_relocate_symtab(). Now we need to have persistent object and member names, so we should save them. */ - mem = ldi->ldinfo_filename + strlen (ldi->ldinfo_filename) + 1; + filename = LDI_FILENAME (ldi, arch64); + mem = filename + strlen (filename) + 1; mem = savestring (mem, strlen (mem)); - objname = savestring (ldi->ldinfo_filename, strlen (ldi->ldinfo_filename)); + objname = savestring (filename, strlen (filename)); - if (ldi->ldinfo_fd < 0) + fd = LDI_FD (ldi, arch64); + if (fd < 0) /* Note that this opens it once for every member; a possible enhancement would be to only open it once for every object. */ abfd = bfd_openr (objname, gnutarget); else - abfd = bfd_fdopenr (objname, gnutarget, ldi->ldinfo_fd); + abfd = bfd_fdopenr (objname, gnutarget, fd); if (!abfd) error ("Could not open `%s' as an executable file: %s", objname, bfd_errmsg (bfd_get_error ())); @@ -390,12 +687,12 @@ add_vmap (ldi) bfd_close (abfd); /* FIXME -- should be error */ warning ("\"%s\": member \"%s\" missing.", abfd->filename, mem); - return; + return 0; } - if (!bfd_check_format(last, bfd_object)) + if (!bfd_check_format (last, bfd_object)) { - bfd_close (last); /* XXX??? */ + bfd_close (last); /* XXX??? */ goto obj_err; } @@ -407,13 +704,13 @@ add_vmap (ldi) bfd_close (abfd); error ("\"%s\": not in executable format: %s.", objname, bfd_errmsg (bfd_get_error ())); - /*NOTREACHED*/ + /*NOTREACHED */ } obj = allocate_objfile (vp->bfd, 0); vp->objfile = obj; #ifndef SOLIB_SYMBOLS_MANUAL - if (catch_errors (objfile_symbol_add, (char *)obj, + if (catch_errors (objfile_symbol_add, obj, "Error while reading shared library symbols:\n", RETURN_MASK_ALL)) { @@ -429,102 +726,97 @@ add_vmap (ldi) Input is ptr to ldinfo() results. */ static void -vmap_ldinfo (ldi) - register struct ld_info *ldi; +vmap_ldinfo (LdInfo *ldi) { struct stat ii, vi; register struct vmap *vp; int got_one, retried; - int got_exec_file; + int got_exec_file = 0; + uint next; + int arch64 = ARCH64 (); /* For each *ldi, see if we have a corresponding *vp. If so, update the mapping, and symbol table. If not, add an entry and symbol table. */ - do { - char *name = ldi->ldinfo_filename; - char *memb = name + strlen(name) + 1; + do + { + char *name = LDI_FILENAME (ldi, arch64); + char *memb = name + strlen (name) + 1; + int fd = LDI_FD (ldi, arch64); - retried = 0; + retried = 0; - if (fstat (ldi->ldinfo_fd, &ii) < 0) - fatal ("cannot fstat(fd=%d) on %s", ldi->ldinfo_fd, name); - retry: - for (got_one = 0, vp = vmap; vp; vp = vp->nxt) - { - /* First try to find a `vp', which is the same as in ldinfo. - If not the same, just continue and grep the next `vp'. If same, - relocate its tstart, tend, dstart, dend values. If no such `vp' - found, get out of this for loop, add this ldi entry as a new vmap - (add_vmap) and come back, fins its `vp' and so on... */ + if (fstat (fd, &ii) < 0) + { + /* The kernel sets ld_info to -1, if the process is still using the + object, and the object is removed. Keep the symbol info for the + removed object and issue a warning. */ + warning ("%s (fd=%d) has disappeared, keeping its symbols", + name, fd); + continue; + } + retry: + for (got_one = 0, vp = vmap; vp; vp = vp->nxt) + { + struct objfile *objfile; + + /* First try to find a `vp', which is the same as in ldinfo. + If not the same, just continue and grep the next `vp'. If same, + relocate its tstart, tend, dstart, dend values. If no such `vp' + found, get out of this for loop, add this ldi entry as a new vmap + (add_vmap) and come back, find its `vp' and so on... */ + + /* The filenames are not always sufficient to match on. */ + + if ((name[0] == '/' && !STREQ (name, vp->name)) + || (memb[0] && !STREQ (memb, vp->member))) + continue; + + /* See if we are referring to the same file. + We have to check objfile->obfd, symfile.c:reread_symbols might + have updated the obfd after a change. */ + objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile; + if (objfile == NULL + || objfile->obfd == NULL + || bfd_stat (objfile->obfd, &vi) < 0) + { + warning ("Unable to stat %s, keeping its symbols", name); + continue; + } - /* The filenames are not always sufficient to match on. */ + if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) + continue; - if ((name[0] == '/' && !STREQ(name, vp->name)) - || (memb[0] && !STREQ(memb, vp->member))) - continue; + if (!retried) + close (fd); - /* See if we are referring to the same file. */ - if (bfd_stat (vp->bfd, &vi) < 0) - /* An error here is innocuous, most likely meaning that - the file descriptor has become worthless. - FIXME: What does it mean for a file descriptor to become - "worthless"? What makes it happen? What error does it - produce (ENOENT? others?)? Should we at least provide - a warning? */ - continue; + ++got_one; - if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino) - continue; + /* Found a corresponding VMAP. Remap! */ - if (!retried) - close (ldi->ldinfo_fd); - - ++got_one; - - /* Found a corresponding VMAP. Remap! */ - - /* We can assume pointer == CORE_ADDR, this code is native only. */ - vp->tstart = (CORE_ADDR) ldi->ldinfo_textorg; - vp->tend = vp->tstart + ldi->ldinfo_textsize; - vp->dstart = (CORE_ADDR) ldi->ldinfo_dataorg; - vp->dend = vp->dstart + ldi->ldinfo_datasize; - - if (vp->tadj) - { - vp->tstart += vp->tadj; - vp->tend += vp->tadj; - } - - /* The objfile is only NULL for the exec file. */ - if (vp->objfile == NULL) - got_exec_file = 1; - -#ifdef DONT_RELOCATE_SYMFILE_OBJFILE - if (vp->objfile == symfile_objfile - || vp->objfile == NULL) - { - ldi->ldinfo_dataorg = 0; - vp->dstart = (CORE_ADDR) 0; - vp->dend = ldi->ldinfo_datasize; - } -#endif + vmap_secs (vp, ldi, arch64); - /* relocate symbol table(s). */ - vmap_symtab (vp); + /* The objfile is only NULL for the exec file. */ + if (vp->objfile == NULL) + got_exec_file = 1; - /* There may be more, so we don't break out of the loop. */ - } + /* relocate symbol table(s). */ + vmap_symtab (vp); - /* if there was no matching *vp, we must perforce create the sucker(s) */ - if (!got_one && !retried) - { - add_vmap (ldi); - ++retried; - goto retry; - } - } while (ldi->ldinfo_next - && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi))); + /* There may be more, so we don't break out of the loop. */ + } + + /* if there was no matching *vp, we must perforce create the sucker(s) */ + if (!got_one && !retried) + { + add_vmap (ldi); + ++retried; + goto retry; + } + } + while ((next = LDI_NEXT (ldi, arch64)) + && (ldi = (void *) (next + (char *) ldi))); /* If we don't find the symfile_objfile anywhere in the ldinfo, it is unlikely that the symbol file is relocated to the proper @@ -554,10 +846,10 @@ symbols to the proper address).\n", gdb_stderr); `exec_sections' need to be relocated only once, as long as the exec file remains unchanged. -*/ + */ static void -vmap_exec () +vmap_exec (void) { static bfd *execbfd; int i; @@ -570,64 +862,102 @@ vmap_exec () if (!vmap || !exec_ops.to_sections) error ("vmap_exec: vmap or exec_ops.to_sections == 0\n"); - for (i=0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) + for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++) { - if (STREQ(".text", exec_ops.to_sections[i].the_bfd_section->name)) + if (STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name)) + { + exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma; + exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma; + } + else if (STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name)) { - exec_ops.to_sections[i].addr += vmap->tstart; - exec_ops.to_sections[i].endaddr += vmap->tstart; + exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; + exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; } - else if (STREQ(".data", exec_ops.to_sections[i].the_bfd_section->name)) + else if (STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name)) { - exec_ops.to_sections[i].addr += vmap->dstart; - exec_ops.to_sections[i].endaddr += vmap->dstart; + exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma; + exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma; } } } - -/* xcoff_relocate_symtab - hook for symbol table relocation. - also reads shared libraries.. */ -void -xcoff_relocate_symtab (pid) - unsigned int pid; -{ -#define MAX_LOAD_SEGS 64 /* maximum number of load segments */ +/* Set the current architecture from the host running GDB. Called when + starting a child process. */ - struct ld_info *ldi; +static void +set_host_arch (int pid) +{ + enum bfd_architecture arch; + unsigned long mach; + bfd abfd; + struct gdbarch_info info; - ldi = (void *) alloca(MAX_LOAD_SEGS * sizeof (*ldi)); + if (__power_rs ()) + { + arch = bfd_arch_rs6000; + mach = bfd_mach_rs6k; + } + else + { + arch = bfd_arch_powerpc; + mach = bfd_mach_ppc; + } + bfd_default_set_arch_mach (&abfd, arch, mach); - /* According to my humble theory, AIX has some timing problems and - when the user stack grows, kernel doesn't update stack info in time - and ptrace calls step on user stack. That is why we sleep here a little, - and give kernel to update its internals. */ + memset (&info, 0, sizeof info); + info.bfd_arch_info = bfd_get_arch_info (&abfd); - usleep (36000); + gdbarch_update (info); +} - errno = 0; - ptrace (PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi, - MAX_LOAD_SEGS * sizeof(*ldi), ldi); - if (errno) - perror_with_name ("ptrace ldinfo"); + +/* xcoff_relocate_symtab - hook for symbol table relocation. + also reads shared libraries.. */ - vmap_ldinfo (ldi); +void +xcoff_relocate_symtab (unsigned int pid) +{ + int load_segs = 64; /* number of load segments */ + int rc; + LdInfo *ldi = NULL; + int arch64 = ARCH64 (); + int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32); + int size; - do { - /* We are allowed to assume CORE_ADDR == pointer. This code is - native only. */ - add_text_to_loadinfo ((CORE_ADDR) ldi->ldinfo_textorg, - (CORE_ADDR) ldi->ldinfo_dataorg); - } while (ldi->ldinfo_next - && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi))); + do + { + size = load_segs * ldisize; + ldi = (void *) xrealloc (ldi, load_segs * size); #if 0 - /* Now that we've jumbled things around, re-sort them. */ - sort_minimal_symbols (); + /* According to my humble theory, AIX has some timing problems and + when the user stack grows, kernel doesn't update stack info in time + and ptrace calls step on user stack. That is why we sleep here a + little, and give kernel to update its internals. */ + usleep (36000); #endif - /* relocate the exec and core sections as well. */ - vmap_exec (); + if (arch64) + rc = ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL); + else + rc = ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL); + + if (rc == -1) + { + if (errno == ENOMEM) + load_segs *= 2; + else + perror_with_name ("ptrace ldinfo"); + } + else + { + vmap_ldinfo (ldi); + vmap_exec (); /* relocate the exec and core sections as well. */ + } + } while (rc == -1); + if (ldi) + free (ldi); } /* Core file stuff. */ @@ -636,33 +966,28 @@ xcoff_relocate_symtab (pid) from the core file. */ void -xcoff_relocate_core (target) - struct target_ops *target; +xcoff_relocate_core (struct target_ops *target) { -/* Offset of member MEMBER in a struct of type TYPE. */ -#ifndef offsetof -#define offsetof(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER) -#endif - -/* Size of a struct ld_info except for the variable-length filename. */ -#define LDINFO_SIZE (offsetof (struct ld_info, ldinfo_filename)) - sec_ptr ldinfo_sec; int offset = 0; - struct ld_info *ldip; + LdInfo *ldi; struct vmap *vp; + int arch64 = ARCH64 (); + + /* Size of a struct ld_info except for the variable-length filename. */ + int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64); /* Allocated size of buffer. */ - int buffer_size = LDINFO_SIZE; + int buffer_size = nonfilesz; char *buffer = xmalloc (buffer_size); struct cleanup *old = make_cleanup (free_current_contents, &buffer); - + /* FIXME, this restriction should not exist. For now, though I'll avoid coredumps with error() pending a real fix. */ if (vmap == NULL) error ("Can't debug a core file without an executable file (on the RS/6000)"); - + ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); if (ldinfo_sec == NULL) { @@ -679,11 +1004,11 @@ xcoff_relocate_core (target) /* Read in everything but the name. */ if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer, - offset, LDINFO_SIZE) == 0) + offset, nonfilesz) == 0) goto bfd_err; /* Now the name. */ - i = LDINFO_SIZE; + i = nonfilesz; do { if (i == buffer_size) @@ -696,72 +1021,110 @@ xcoff_relocate_core (target) goto bfd_err; if (buffer[i++] == '\0') ++names_found; - } while (names_found < 2); + } + while (names_found < 2); - ldip = (struct ld_info *) buffer; + ldi = (LdInfo *) buffer; /* Can't use a file descriptor from the core file; need to open it. */ - ldip->ldinfo_fd = -1; - + if (arch64) + ldi->l64.ldinfo_fd = -1; + else + ldi->l32.ldinfo_fd = -1; + /* The first ldinfo is for the exec file, allocated elsewhere. */ if (offset == 0) vp = vmap; else - vp = add_vmap (ldip); - - offset += ldip->ldinfo_next; + vp = add_vmap (ldi); - /* We can assume pointer == CORE_ADDR, this code is native only. */ - vp->tstart = (CORE_ADDR) ldip->ldinfo_textorg; - vp->tend = vp->tstart + ldip->ldinfo_textsize; - vp->dstart = (CORE_ADDR) ldip->ldinfo_dataorg; - vp->dend = vp->dstart + ldip->ldinfo_datasize; - - if (vp->tadj != 0) - { - vp->tstart += vp->tadj; - vp->tend += vp->tadj; - } + offset += LDI_NEXT (ldi, arch64); + vmap_secs (vp, ldi, arch64); /* Unless this is the exec file, - add our sections to the section table for the core target. */ + add our sections to the section table for the core target. */ if (vp != vmap) { - int count; struct section_table *stp; - - count = target->to_sections_end - target->to_sections; - count += 2; - target->to_sections = (struct section_table *) - xrealloc (target->to_sections, - sizeof (struct section_table) * count); - target->to_sections_end = target->to_sections + count; + + target_resize_to_sections (target, 2); stp = target->to_sections_end - 2; - /* "Why do we add bfd_section_vma?", I hear you cry. - Well, the start of the section in the file is actually - that far into the section as the struct vmap understands it. - So for text sections, bfd_section_vma tends to be 0x200, - and if vp->tstart is 0xd0002000, then the first byte of - the text section on disk corresponds to address 0xd0002200. */ stp->bfd = vp->bfd; stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text"); - stp->addr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->tstart; - stp->endaddr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->tend; + stp->addr = vp->tstart; + stp->endaddr = vp->tend; stp++; - + stp->bfd = vp->bfd; stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data"); - stp->addr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->dstart; - stp->endaddr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->dend; + stp->addr = vp->dstart; + stp->endaddr = vp->dend; } vmap_symtab (vp); - - add_text_to_loadinfo ((CORE_ADDR)ldip->ldinfo_textorg, - (CORE_ADDR)ldip->ldinfo_dataorg); - } while (ldip->ldinfo_next != 0); + } + while (LDI_NEXT (ldi, arch64) != 0); vmap_exec (); breakpoint_re_set (); do_cleanups (old); } + +int +kernel_u_size (void) +{ + return (sizeof (struct user)); +} + +/* Under AIX, we have to pass the correct TOC pointer to a function + when calling functions in the inferior. + We try to find the relative toc offset of the objfile containing PC + and add the current load address of the data segment from the vmap. */ + +static CORE_ADDR +find_toc_address (CORE_ADDR pc) +{ + struct vmap *vp; + extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */ + + for (vp = vmap; vp; vp = vp->nxt) + { + if (pc >= vp->tstart && pc < vp->tend) + { + /* vp->objfile is only NULL for the exec file. */ + return vp->dstart + get_toc_offset (vp->objfile == NULL + ? symfile_objfile + : vp->objfile); + } + } + error ("Unable to find TOC entry for pc 0x%x\n", pc); +} + +/* Register that we are able to handle rs6000 core file formats. */ + +static struct core_fns rs6000_core_fns = +{ + bfd_target_xcoff_flavour, /* core_flavour */ + default_check_format, /* check_format */ + default_core_sniffer, /* core_sniffer */ + fetch_core_registers, /* core_read_registers */ + NULL /* next */ +}; + +void +_initialize_core_rs6000 (void) +{ + /* Initialize hook in rs6000-tdep.c for determining the TOC address when + calling functions in the inferior. */ + rs6000_find_toc_address_hook = find_toc_address; + + /* Initialize hook in rs6000-tdep.c to set the current architecture when + starting a child process. */ + rs6000_set_host_arch_hook = set_host_arch; + + /* For native configurations, where this module is included, inform + the xcoffsolib module where it can find the function for symbol table + relocation at runtime. */ + xcoff_relocate_symtab_hook = xcoff_relocate_symtab; + add_core_fns (&rs6000_core_fns); +}