| /* Functions specific to running gdb native on a SPARC running SunOS4. |
| |
| Copyright 1989, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, |
| 2001, 2002, 2003 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 "inferior.h" |
| #include "target.h" |
| #include "gdbcore.h" |
| #include "regcache.h" |
| |
| #ifdef HAVE_SYS_PARAM_H |
| #include <sys/param.h> |
| #endif |
| #include <signal.h> |
| #include <sys/ptrace.h> |
| #include "gdb_wait.h" |
| #ifdef __linux__ |
| #include <asm/reg.h> |
| #else |
| #include <machine/reg.h> |
| #endif |
| #include <sys/user.h> |
| |
| /* We don't store all registers immediately when requested, since they |
| get sent over in large chunks anyway. Instead, we accumulate most |
| of the changes and send them over once. "deferred_stores" keeps |
| track of which sets of registers we have locally-changed copies of, |
| so we only need send the groups that have changed. */ |
| |
| #define INT_REGS 1 |
| #define STACK_REGS 2 |
| #define FP_REGS 4 |
| |
| /* Fetch one or more registers from the inferior. REGNO == -1 to get |
| them all. We actually fetch more than requested, when convenient, |
| marking them as valid so we won't fetch them again. */ |
| |
| void |
| fetch_inferior_registers (int regno) |
| { |
| struct regs inferior_registers; |
| struct fp_status inferior_fp_registers; |
| int i; |
| int fetch_pid; |
| |
| /* NOTE: cagney/2002-12-03: This code assumes that the currently |
| selected light weight processes' registers can be written |
| directly into the selected thread's register cache. This works |
| fine when given an 1:1 LWP:thread model (such as found on |
| GNU/Linux) but will, likely, have problems when used on an N:1 |
| (userland threads) or N:M (userland multiple LWP) model. In the |
| case of the latter two, the LWP's registers do not necessarily |
| belong to the selected thread (the LWP could be in the middle of |
| executing the thread switch code). |
| |
| These functions should instead be paramaterized with an explicit |
| object (struct regcache, struct thread_info?) into which the LWPs |
| registers can be written. */ |
| |
| fetch_pid = TIDGET (inferior_ptid); |
| if (fetch_pid == 0) |
| fetch_pid = PIDGET (inferior_ptid); |
| |
| /* We should never be called with deferred stores, because a prerequisite |
| for writing regs is to have fetched them all (PREPARE_TO_STORE), sigh. */ |
| if (deferred_stores) |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| |
| DO_DEFERRED_STORES; |
| |
| /* Global and Out regs are fetched directly, as well as the control |
| registers. If we're getting one of the in or local regs, |
| and the stack pointer has not yet been fetched, |
| we have to do that first, since they're found in memory relative |
| to the stack pointer. */ |
| if (regno < O7_REGNUM /* including -1 */ |
| || regno >= Y_REGNUM |
| || (!deprecated_register_valid[SP_REGNUM] && regno < I7_REGNUM)) |
| { |
| if (0 != ptrace (PTRACE_GETREGS, fetch_pid, |
| (PTRACE_ARG3_TYPE) & inferior_registers, 0)) |
| perror ("ptrace_getregs"); |
| |
| deprecated_registers[REGISTER_BYTE (0)] = 0; |
| memcpy (&deprecated_registers[REGISTER_BYTE (1)], |
| &inferior_registers.r_g1, 15 * REGISTER_RAW_SIZE (G0_REGNUM)); |
| *(int *) &deprecated_registers[REGISTER_BYTE (PS_REGNUM)] |
| = inferior_registers.r_ps; |
| *(int *) &deprecated_registers[REGISTER_BYTE (PC_REGNUM)] |
| = inferior_registers.r_pc; |
| *(int *) &deprecated_registers[REGISTER_BYTE (NPC_REGNUM)] |
| = inferior_registers.r_npc; |
| *(int *) ®isters[REGISTER_BYTE (Y_REGNUM)] = inferior_registers.r_y; |
| |
| for (i = G0_REGNUM; i <= O7_REGNUM; i++) |
| deprecated_register_valid[i] = 1; |
| deprecated_register_valid[Y_REGNUM] = 1; |
| deprecated_register_valid[PS_REGNUM] = 1; |
| deprecated_register_valid[PC_REGNUM] = 1; |
| deprecated_register_valid[NPC_REGNUM] = 1; |
| /* If we don't set these valid, read_register_bytes() rereads |
| all the regs every time it is called! FIXME. */ |
| deprecated_register_valid[WIM_REGNUM] = 1; /* Not true yet, FIXME */ |
| deprecated_register_valid[TBR_REGNUM] = 1; /* Not true yet, FIXME */ |
| deprecated_register_valid[CPS_REGNUM] = 1; /* Not true yet, FIXME */ |
| } |
| |
| /* Floating point registers */ |
| if (regno == -1 || |
| regno == FPS_REGNUM || |
| (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31)) |
| { |
| if (0 != ptrace (PTRACE_GETFPREGS, fetch_pid, |
| (PTRACE_ARG3_TYPE) & inferior_fp_registers, |
| 0)) |
| perror ("ptrace_getfpregs"); |
| memcpy (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], |
| &inferior_fp_registers, sizeof inferior_fp_registers.fpu_fr); |
| memcpy (&deprecated_registers[REGISTER_BYTE (FPS_REGNUM)], |
| &inferior_fp_registers.Fpu_fsr, sizeof (FPU_FSR_TYPE)); |
| for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) |
| deprecated_register_valid[i] = 1; |
| deprecated_register_valid[FPS_REGNUM] = 1; |
| } |
| |
| /* These regs are saved on the stack by the kernel. Only read them |
| all (16 ptrace calls!) if we really need them. */ |
| if (regno == -1) |
| { |
| CORE_ADDR sp = *(unsigned int *) & deprecated_registers[REGISTER_BYTE (SP_REGNUM)]; |
| target_read_memory (sp, &deprecated_registers[REGISTER_BYTE (L0_REGNUM)], |
| 16 * REGISTER_RAW_SIZE (L0_REGNUM)); |
| for (i = L0_REGNUM; i <= I7_REGNUM; i++) |
| deprecated_register_valid[i] = 1; |
| } |
| else if (regno >= L0_REGNUM && regno <= I7_REGNUM) |
| { |
| CORE_ADDR sp = *(unsigned int *) & deprecated_registers[REGISTER_BYTE (SP_REGNUM)]; |
| i = REGISTER_BYTE (regno); |
| if (deprecated_register_valid[regno]) |
| printf_unfiltered ("register %d valid and read\n", regno); |
| target_read_memory (sp + i - REGISTER_BYTE (L0_REGNUM), |
| &deprecated_registers[i], REGISTER_RAW_SIZE (regno)); |
| deprecated_register_valid[regno] = 1; |
| } |
| } |
| |
| /* 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). */ |
| |
| void |
| store_inferior_registers (int regno) |
| { |
| struct regs inferior_registers; |
| struct fp_status inferior_fp_registers; |
| int wanna_store = INT_REGS + STACK_REGS + FP_REGS; |
| int store_pid; |
| |
| /* NOTE: cagney/2002-12-02: See comment in fetch_inferior_registers |
| about threaded assumptions. */ |
| store_pid = TIDGET (inferior_ptid); |
| if (store_pid == 0) |
| store_pid = PIDGET (inferior_ptid); |
| |
| /* First decide which pieces of machine-state we need to modify. |
| Default for regno == -1 case is all pieces. */ |
| if (regno >= 0) |
| { |
| if (FP0_REGNUM <= regno && regno < FP0_REGNUM + 32) |
| { |
| wanna_store = FP_REGS; |
| } |
| else |
| { |
| if (regno == SP_REGNUM) |
| wanna_store = INT_REGS + STACK_REGS; |
| else if (regno < L0_REGNUM || regno > I7_REGNUM) |
| wanna_store = INT_REGS; |
| else if (regno == FPS_REGNUM) |
| wanna_store = FP_REGS; |
| else |
| wanna_store = STACK_REGS; |
| } |
| } |
| |
| /* See if we're forcing the stores to happen now, or deferring. */ |
| if (regno == -2) |
| { |
| wanna_store = deferred_stores; |
| deferred_stores = 0; |
| } |
| else |
| { |
| if (wanna_store == STACK_REGS) |
| { |
| /* Fall through and just store one stack reg. If we deferred |
| it, we'd have to store them all, or remember more info. */ |
| } |
| else |
| { |
| deferred_stores |= wanna_store; |
| return; |
| } |
| } |
| |
| if (wanna_store & STACK_REGS) |
| { |
| CORE_ADDR sp = *(unsigned int *) & deprecated_registers[REGISTER_BYTE (SP_REGNUM)]; |
| |
| if (regno < 0 || regno == SP_REGNUM) |
| { |
| if (!deprecated_register_valid[L0_REGNUM + 5]) |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| target_write_memory (sp, |
| &deprecated_registers[REGISTER_BYTE (L0_REGNUM)], |
| 16 * REGISTER_RAW_SIZE (L0_REGNUM)); |
| } |
| else |
| { |
| if (!deprecated_register_valid[regno]) |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| target_write_memory (sp + REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM), |
| &deprecated_registers[REGISTER_BYTE (regno)], |
| REGISTER_RAW_SIZE (regno)); |
| } |
| |
| } |
| |
| if (wanna_store & INT_REGS) |
| { |
| if (!deprecated_register_valid[G1_REGNUM]) |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| |
| memcpy (&inferior_registers.r_g1, |
| &deprecated_registers[REGISTER_BYTE (G1_REGNUM)], |
| 15 * REGISTER_RAW_SIZE (G1_REGNUM)); |
| |
| inferior_registers.r_ps = |
| *(int *) &deprecated_registers[REGISTER_BYTE (PS_REGNUM)]; |
| inferior_registers.r_pc = |
| *(int *) &deprecated_registers[REGISTER_BYTE (PC_REGNUM)]; |
| inferior_registers.r_npc = |
| *(int *) &deprecated_registers[REGISTER_BYTE (NPC_REGNUM)]; |
| inferior_registers.r_y = |
| *(int *) &deprecated_registers[REGISTER_BYTE (Y_REGNUM)]; |
| |
| if (0 != ptrace (PTRACE_SETREGS, store_pid, |
| (PTRACE_ARG3_TYPE) & inferior_registers, 0)) |
| perror ("ptrace_setregs"); |
| } |
| |
| if (wanna_store & FP_REGS) |
| { |
| if (!deprecated_register_valid[FP0_REGNUM + 9]) |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| memcpy (&inferior_fp_registers, |
| &deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], |
| sizeof inferior_fp_registers.fpu_fr); |
| memcpy (&inferior_fp_registers.Fpu_fsr, |
| &deprecated_registers[REGISTER_BYTE (FPS_REGNUM)], |
| sizeof (FPU_FSR_TYPE)); |
| if (0 != |
| ptrace (PTRACE_SETFPREGS, store_pid, |
| (PTRACE_ARG3_TYPE) & inferior_fp_registers, 0)) |
| perror ("ptrace_setfpregs"); |
| } |
| } |
| |
| /* Provide registers to GDB from a core file. |
| |
| CORE_REG_SECT points to an array of bytes, which are the contents |
| of a `note' from a core file which BFD thinks might contain |
| register contents. CORE_REG_SIZE is its size. |
| |
| WHICH says which register set corelow suspects this is: |
| 0 --- the general-purpose register set |
| 2 --- the floating-point register set |
| |
| IGNORE is unused. */ |
| |
| static void |
| fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
| int which, CORE_ADDR ignore) |
| { |
| |
| if (which == 0) |
| { |
| |
| /* Integer registers */ |
| |
| #define gregs ((struct regs *)core_reg_sect) |
| /* G0 *always* holds 0. */ |
| *(int *) &deprecated_registers[REGISTER_BYTE (0)] = 0; |
| |
| /* The globals and output registers. */ |
| memcpy (&deprecated_registers[REGISTER_BYTE (G1_REGNUM)], &gregs->r_g1, |
| 15 * REGISTER_RAW_SIZE (G1_REGNUM)); |
| *(int *) &deprecated_registers[REGISTER_BYTE (PS_REGNUM)] = gregs->r_ps; |
| *(int *) &deprecated_registers[REGISTER_BYTE (PC_REGNUM)] = gregs->r_pc; |
| *(int *) &deprecated_registers[REGISTER_BYTE (NPC_REGNUM)] = gregs->r_npc; |
| *(int *) &deprecated_registers[REGISTER_BYTE (Y_REGNUM)] = gregs->r_y; |
| |
| /* My best guess at where to get the locals and input |
| registers is exactly where they usually are, right above |
| the stack pointer. If the core dump was caused by a bus error |
| from blowing away the stack pointer (as is possible) then this |
| won't work, but it's worth the try. */ |
| { |
| int sp; |
| |
| sp = *(int *) &deprecated_registers[REGISTER_BYTE (SP_REGNUM)]; |
| if (0 != target_read_memory (sp, |
| &deprecated_registers[REGISTER_BYTE (L0_REGNUM)], |
| 16 * REGISTER_RAW_SIZE (L0_REGNUM))) |
| { |
| /* fprintf_unfiltered so user can still use gdb */ |
| fprintf_unfiltered (gdb_stderr, |
| "Couldn't read input and local registers from core file\n"); |
| } |
| } |
| } |
| else if (which == 2) |
| { |
| |
| /* Floating point registers */ |
| |
| #define fpuregs ((struct fpu *) core_reg_sect) |
| if (core_reg_size >= sizeof (struct fpu)) |
| { |
| memcpy (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], |
| fpuregs->fpu_regs, sizeof (fpuregs->fpu_regs)); |
| memcpy (&deprecated_registers[REGISTER_BYTE (FPS_REGNUM)], |
| &fpuregs->fpu_fsr, sizeof (FPU_FSR_TYPE)); |
| } |
| else |
| fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n"); |
| } |
| } |
| |
| int |
| kernel_u_size (void) |
| { |
| return (sizeof (struct user)); |
| } |
| |
| |
| /* Register that we are able to handle sparc core file formats. |
| FIXME: is this really bfd_target_unknown_flavour? */ |
| |
| static struct core_fns sparc_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_sparc (void) |
| { |
| add_core_fns (&sparc_core_fns); |
| } |