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Diffstat (limited to 'gdb/ppc-linux-nat.c')
| -rw-r--r-- | gdb/ppc-linux-nat.c | 534 |
1 files changed, 0 insertions, 534 deletions
diff --git a/gdb/ppc-linux-nat.c b/gdb/ppc-linux-nat.c deleted file mode 100644 index 721e05f..0000000 --- a/gdb/ppc-linux-nat.c +++ /dev/null @@ -1,534 +0,0 @@ -/* PPC GNU/Linux native support. - Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002 - Free Software Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "frame.h" -#include "inferior.h" -#include "gdbcore.h" -#include "regcache.h" - -#include <sys/types.h> -#include <sys/param.h> -#include <signal.h> -#include <sys/user.h> -#include <sys/ioctl.h> -#include <sys/wait.h> -#include <fcntl.h> -#include <sys/procfs.h> -#include <sys/ptrace.h> - -/* Prototypes for supply_gregset etc. */ -#include "gregset.h" -#include "ppc-tdep.h" - -#ifndef PT_READ_U -#define PT_READ_U PTRACE_PEEKUSR -#endif -#ifndef PT_WRITE_U -#define PT_WRITE_U PTRACE_POKEUSR -#endif - -/* Default the type of the ptrace transfer to int. */ -#ifndef PTRACE_XFER_TYPE -#define PTRACE_XFER_TYPE int -#endif - -/* Glibc's headers don't define PTRACE_GETVRREGS so we cannot use a - configure time check. Some older glibc's (for instance 2.2.1) - don't have a specific powerpc version of ptrace.h, and fall back on - a generic one. In such cases, sys/ptrace.h defines - PTRACE_GETFPXREGS and PTRACE_SETFPXREGS to the same numbers that - ppc kernel's asm/ptrace.h defines PTRACE_GETVRREGS and - PTRACE_SETVRREGS to be. This also makes a configury check pretty - much useless. */ - -/* These definitions should really come from the glibc header files, - but Glibc doesn't know about the vrregs yet. */ -#ifndef PTRACE_GETVRREGS -#define PTRACE_GETVRREGS 18 -#define PTRACE_SETVRREGS 19 -#endif - -/* This oddity is because the Linux kernel defines elf_vrregset_t as - an array of 33 16 bytes long elements. I.e. it leaves out vrsave. - However the PTRACE_GETVRREGS and PTRACE_SETVRREGS requests return - the vrsave as an extra 4 bytes at the end. I opted for creating a - flat array of chars, so that it is easier to manipulate for gdb. - - There are 32 vector registers 16 bytes longs, plus a VSCR register - which is only 4 bytes long, but is fetched as a 16 bytes - quantity. Up to here we have the elf_vrregset_t structure. - Appended to this there is space for the VRSAVE register: 4 bytes. - Even though this vrsave register is not included in the regset - typedef, it is handled by the ptrace requests. - - Note that GNU/Linux doesn't support little endian PPC hardware, - therefore the offset at which the real value of the VSCR register - is located will be always 12 bytes. - - The layout is like this (where x is the actual value of the vscr reg): */ - -/* *INDENT-OFF* */ -/* - |.|.|.|.|.....|.|.|.|.||.|.|.|x||.| - <-------> <-------><-------><-> - VR0 VR31 VSCR VRSAVE -*/ -/* *INDENT-ON* */ - -#define SIZEOF_VRREGS 33*16+4 - -typedef char gdb_vrregset_t[SIZEOF_VRREGS]; - -/* For runtime check of ptrace support for VRREGS. */ -int have_ptrace_getvrregs = 1; - -int -kernel_u_size (void) -{ - return (sizeof (struct user)); -} - -/* *INDENT-OFF* */ -/* registers layout, as presented by the ptrace interface: -PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7, -PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_R13, PT_R14, PT_R15, -PT_R16, PT_R17, PT_R18, PT_R19, PT_R20, PT_R21, PT_R22, PT_R23, -PT_R24, PT_R25, PT_R26, PT_R27, PT_R28, PT_R29, PT_R30, PT_R31, -PT_FPR0, PT_FPR0 + 2, PT_FPR0 + 4, PT_FPR0 + 6, PT_FPR0 + 8, PT_FPR0 + 10, PT_FPR0 + 12, PT_FPR0 + 14, -PT_FPR0 + 16, PT_FPR0 + 18, PT_FPR0 + 20, PT_FPR0 + 22, PT_FPR0 + 24, PT_FPR0 + 26, PT_FPR0 + 28, PT_FPR0 + 30, -PT_FPR0 + 32, PT_FPR0 + 34, PT_FPR0 + 36, PT_FPR0 + 38, PT_FPR0 + 40, PT_FPR0 + 42, PT_FPR0 + 44, PT_FPR0 + 46, -PT_FPR0 + 48, PT_FPR0 + 50, PT_FPR0 + 52, PT_FPR0 + 54, PT_FPR0 + 56, PT_FPR0 + 58, PT_FPR0 + 60, PT_FPR0 + 62, -PT_NIP, PT_MSR, PT_CCR, PT_LNK, PT_CTR, PT_XER, PT_MQ */ -/* *INDENT_ON * */ - -static int -ppc_register_u_addr (int regno) -{ - int u_addr = -1; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - /* General purpose registers occupy 1 slot each in the buffer */ - if (regno >= tdep->ppc_gp0_regnum && regno <= tdep->ppc_gplast_regnum ) - u_addr = ((PT_R0 + regno) * 4); - - /* Floating point regs: 2 slots each */ - if (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM) - u_addr = ((PT_FPR0 + (regno - FP0_REGNUM) * 2) * 4); - - /* UISA special purpose registers: 1 slot each */ - if (regno == PC_REGNUM) - u_addr = PT_NIP * 4; - if (regno == tdep->ppc_lr_regnum) - u_addr = PT_LNK * 4; - if (regno == tdep->ppc_cr_regnum) - u_addr = PT_CCR * 4; - if (regno == tdep->ppc_xer_regnum) - u_addr = PT_XER * 4; - if (regno == tdep->ppc_ctr_regnum) - u_addr = PT_CTR * 4; - if (regno == tdep->ppc_mq_regnum) - u_addr = PT_MQ * 4; - if (regno == tdep->ppc_ps_regnum) - u_addr = PT_MSR * 4; - if (regno == tdep->ppc_fpscr_regnum) - u_addr = PT_FPSCR * 4; - - return u_addr; -} - -static int -ppc_ptrace_cannot_fetch_store_register (int regno) -{ - return (ppc_register_u_addr (regno) == -1); -} - -/* The Linux kernel ptrace interface for AltiVec registers uses the - registers set mechanism, as opposed to the interface for all the - other registers, that stores/fetches each register individually. */ -static void -fetch_altivec_register (int tid, int regno) -{ - int ret; - int offset = 0; - gdb_vrregset_t regs; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - int vrregsize = REGISTER_RAW_SIZE (tdep->ppc_vr0_regnum); - - ret = ptrace (PTRACE_GETVRREGS, tid, 0, ®s); - if (ret < 0) - { - if (errno == EIO) - { - have_ptrace_getvrregs = 0; - return; - } - perror_with_name ("Unable to fetch AltiVec register"); - } - - /* VSCR is fetched as a 16 bytes quantity, but it is really 4 bytes - long on the hardware. We deal only with the lower 4 bytes of the - vector. VRSAVE is at the end of the array in a 4 bytes slot, so - there is no need to define an offset for it. */ - if (regno == (tdep->ppc_vrsave_regnum - 1)) - offset = vrregsize - REGISTER_RAW_SIZE (tdep->ppc_vrsave_regnum); - - supply_register (regno, - regs + (regno - tdep->ppc_vr0_regnum) * vrregsize + offset); -} - -static void -fetch_register (int tid, int regno) -{ - /* This isn't really an address. But ptrace thinks of it as one. */ - char mess[128]; /* For messages */ - register int i; - unsigned int offset; /* Offset of registers within the u area. */ - char *buf = alloca (MAX_REGISTER_RAW_SIZE); - CORE_ADDR regaddr = ppc_register_u_addr (regno); - - if (altivec_register_p (regno)) - { - /* If this is the first time through, or if it is not the first - time through, and we have comfirmed that there is kernel - support for such a ptrace request, then go and fetch the - register. */ - if (have_ptrace_getvrregs) - { - fetch_altivec_register (tid, regno); - return; - } - /* If we have discovered that there is no ptrace support for - AltiVec registers, fall through and return zeroes, because - regaddr will be -1 in this case. */ - } - - if (regaddr == -1) - { - memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */ - supply_register (regno, buf); - return; - } - - for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) - { - errno = 0; - *(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid, - (PTRACE_ARG3_TYPE) regaddr, 0); - regaddr += sizeof (PTRACE_XFER_TYPE); - if (errno != 0) - { - sprintf (mess, "reading register %s (#%d)", - REGISTER_NAME (regno), regno); - perror_with_name (mess); - } - } - supply_register (regno, buf); -} - -static void -supply_vrregset (gdb_vrregset_t *vrregsetp) -{ - int i; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - int num_of_vrregs = tdep->ppc_vrsave_regnum - tdep->ppc_vr0_regnum + 1; - int vrregsize = REGISTER_RAW_SIZE (tdep->ppc_vr0_regnum); - int offset = vrregsize - REGISTER_RAW_SIZE (tdep->ppc_vrsave_regnum); - - for (i = 0; i < num_of_vrregs; i++) - { - /* The last 2 registers of this set are only 32 bit long, not - 128. However an offset is necessary only for VSCR because it - occupies a whole vector, while VRSAVE occupies a full 4 bytes - slot. */ - if (i == (num_of_vrregs - 2)) - supply_register (tdep->ppc_vr0_regnum + i, - *vrregsetp + i * vrregsize + offset); - else - supply_register (tdep->ppc_vr0_regnum + i, *vrregsetp + i * vrregsize); - } -} - -static void -fetch_altivec_registers (int tid) -{ - int ret; - gdb_vrregset_t regs; - - ret = ptrace (PTRACE_GETVRREGS, tid, 0, ®s); - if (ret < 0) - { - if (errno == EIO) - { - have_ptrace_getvrregs = 0; - return; - } - perror_with_name ("Unable to fetch AltiVec registers"); - } - supply_vrregset (®s); -} - -static void -fetch_ppc_registers (int tid) -{ - int i; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - for (i = 0; i <= tdep->ppc_fpscr_regnum; i++) - fetch_register (tid, i); - if (tdep->ppc_mq_regnum != -1) - fetch_register (tid, tdep->ppc_mq_regnum); - if (have_ptrace_getvrregs) - if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1) - fetch_altivec_registers (tid); -} - -/* Fetch registers from the child process. Fetch all registers if - regno == -1, otherwise fetch all general registers or all floating - point registers depending upon the value of regno. */ -void -fetch_inferior_registers (int regno) -{ - /* Overload thread id onto process id */ - int tid = TIDGET (inferior_ptid); - - /* No thread id, just use process id */ - if (tid == 0) - tid = PIDGET (inferior_ptid); - - if (regno == -1) - fetch_ppc_registers (tid); - else - fetch_register (tid, regno); -} - -/* Store one register. */ -static void -store_altivec_register (int tid, int regno) -{ - int ret; - int offset = 0; - gdb_vrregset_t regs; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - int vrregsize = REGISTER_RAW_SIZE (tdep->ppc_vr0_regnum); - - ret = ptrace (PTRACE_GETVRREGS, tid, 0, ®s); - if (ret < 0) - { - if (errno == EIO) - { - have_ptrace_getvrregs = 0; - return; - } - perror_with_name ("Unable to fetch AltiVec register"); - } - - /* VSCR is fetched as a 16 bytes quantity, but it is really 4 bytes - long on the hardware. */ - if (regno == (tdep->ppc_vrsave_regnum - 1)) - offset = vrregsize - REGISTER_RAW_SIZE (tdep->ppc_vrsave_regnum); - - regcache_collect (regno, - regs + (regno - tdep->ppc_vr0_regnum) * vrregsize + offset); - - ret = ptrace (PTRACE_SETVRREGS, tid, 0, ®s); - if (ret < 0) - perror_with_name ("Unable to store AltiVec register"); -} - -static void -store_register (int tid, int regno) -{ - /* This isn't really an address. But ptrace thinks of it as one. */ - CORE_ADDR regaddr = ppc_register_u_addr (regno); - char mess[128]; /* For messages */ - register int i; - unsigned int offset; /* Offset of registers within the u area. */ - char *buf = alloca (MAX_REGISTER_RAW_SIZE); - - if (altivec_register_p (regno)) - { - store_altivec_register (tid, regno); - return; - } - - if (regaddr == -1) - return; - - regcache_collect (regno, buf); - for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) - { - errno = 0; - ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr, - *(PTRACE_XFER_TYPE *) & buf[i]); - regaddr += sizeof (PTRACE_XFER_TYPE); - - if (errno == EIO - && regno == gdbarch_tdep (current_gdbarch)->ppc_fpscr_regnum) - { - /* Some older kernel versions don't allow fpscr to be written. */ - continue; - } - - if (errno != 0) - { - sprintf (mess, "writing register %s (#%d)", - REGISTER_NAME (regno), regno); - perror_with_name (mess); - } - } -} - -static void -fill_vrregset (gdb_vrregset_t *vrregsetp) -{ - int i; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - int num_of_vrregs = tdep->ppc_vrsave_regnum - tdep->ppc_vr0_regnum + 1; - int vrregsize = REGISTER_RAW_SIZE (tdep->ppc_vr0_regnum); - int offset = vrregsize - REGISTER_RAW_SIZE (tdep->ppc_vrsave_regnum); - - for (i = 0; i < num_of_vrregs; i++) - { - /* The last 2 registers of this set are only 32 bit long, not - 128, but only VSCR is fetched as a 16 bytes quantity. */ - if (i == (num_of_vrregs - 2)) - regcache_collect (tdep->ppc_vr0_regnum + i, - *vrregsetp + i * vrregsize + offset); - else - regcache_collect (tdep->ppc_vr0_regnum + i, *vrregsetp + i * vrregsize); - } -} - -static void -store_altivec_registers (int tid) -{ - int ret; - gdb_vrregset_t regs; - - ret = ptrace (PTRACE_GETVRREGS, tid, 0, (int) ®s); - if (ret < 0) - { - if (errno == EIO) - { - have_ptrace_getvrregs = 0; - return; - } - perror_with_name ("Couldn't get AltiVec registers"); - } - - fill_vrregset (®s); - - if (ptrace (PTRACE_SETVRREGS, tid, 0, (int) ®s) < 0) - perror_with_name ("Couldn't write AltiVec registers"); -} - -static void -store_ppc_registers (int tid) -{ - int i; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - for (i = 0; i <= tdep->ppc_fpscr_regnum; i++) - store_register (tid, i); - if (tdep->ppc_mq_regnum != -1) - store_register (tid, tdep->ppc_mq_regnum); - if (have_ptrace_getvrregs) - if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1) - store_altivec_registers (tid); -} - -void -store_inferior_registers (int regno) -{ - /* Overload thread id onto process id */ - int tid = TIDGET (inferior_ptid); - - /* No thread id, just use process id */ - if (tid == 0) - tid = PIDGET (inferior_ptid); - - if (regno >= 0) - store_register (tid, regno); - else - store_ppc_registers (tid); -} - -void -supply_gregset (gdb_gregset_t *gregsetp) -{ - ppc_linux_supply_gregset ((char *) gregsetp); -} - -void -fill_gregset (gdb_gregset_t *gregsetp, int regno) -{ - int regi; - elf_greg_t *regp = (elf_greg_t *) gregsetp; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - for (regi = 0; regi < 32; regi++) - { - if ((regno == -1) || regno == regi) - regcache_collect (regi, regp + PT_R0 + regi); - } - - if ((regno == -1) || regno == PC_REGNUM) - regcache_collect (PC_REGNUM, regp + PT_NIP); - if ((regno == -1) || regno == tdep->ppc_lr_regnum) - regcache_collect (tdep->ppc_lr_regnum, regp + PT_LNK); - if ((regno == -1) || regno == tdep->ppc_cr_regnum) - regcache_collect (tdep->ppc_cr_regnum, regp + PT_CCR); - if ((regno == -1) || regno == tdep->ppc_xer_regnum) - regcache_collect (tdep->ppc_xer_regnum, regp + PT_XER); - if ((regno == -1) || regno == tdep->ppc_ctr_regnum) - regcache_collect (tdep->ppc_ctr_regnum, regp + PT_CTR); - if (((regno == -1) || regno == tdep->ppc_mq_regnum) - && (tdep->ppc_mq_regnum != -1)) - regcache_collect (tdep->ppc_mq_regnum, regp + PT_MQ); - if ((regno == -1) || regno == tdep->ppc_ps_regnum) - regcache_collect (tdep->ppc_ps_regnum, regp + PT_MSR); -} - -void -supply_fpregset (gdb_fpregset_t * fpregsetp) -{ - ppc_linux_supply_fpregset ((char *) fpregsetp); -} - -/* Given a pointer to a floating point register set in /proc format - (fpregset_t *), update the register specified by REGNO from gdb's - idea of the current floating point register set. If REGNO is -1, - update them all. */ -void -fill_fpregset (gdb_fpregset_t *fpregsetp, int regno) -{ - int regi; - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - - for (regi = 0; regi < 32; regi++) - { - if ((regno == -1) || (regno == FP0_REGNUM + regi)) - regcache_collect (FP0_REGNUM + regi, (char *) (*fpregsetp + regi)); - } - if ((regno == -1) || regno == tdep->ppc_fpscr_regnum) - regcache_collect (tdep->ppc_fpscr_regnum, (char *) (*fpregsetp + regi)); -} |