From 53e95fcfec25913398c95486c2c80afdf06f0eb0 Mon Sep 17 00:00:00 2001 From: Jiri Smid Date: Fri, 21 Sep 2001 12:19:15 +0000 Subject: [PATCH] * config/i386/x86-64linux.mh: New file. * config/i386/x86-64linux.mt: New file. * config/i386/nm-x86_64.h: New file. * x86-64-linux-tdep.c: New file. * x86-64-linux-nat.c: New file. * x86-64-tdep.c: New file. * x86-64-tdep.h: New file. * config/djgpp/fnchange.lst: Add entries for x86_64-linux-tdep.c and x86_64-linux-nat.c * Makefile.in: Add x86_64-linux-tdep.o, x86_64-tdep.o, x86_64-linux-tdep.o, x86_64-nat.o, update dependencies. --- gdb/Makefile.in | 11 +- gdb/config/djgpp/fnchange.lst | 2 + gdb/config/i386/nm-x86-64.h | 100 ++++ gdb/config/i386/x86-64linux.mh | 11 + gdb/config/i386/x86-64linux.mt | 5 + gdb/x86-64-linux-nat.c | 563 ++++++++++++++++++ gdb/x86-64-linux-tdep.c | 136 +++++ gdb/x86-64-tdep.c | 1010 ++++++++++++++++++++++++++++++++ gdb/x86-64-tdep.h | 49 ++ 9 files changed, 1886 insertions(+), 1 deletion(-) create mode 100644 gdb/config/i386/nm-x86-64.h create mode 100644 gdb/config/i386/x86-64linux.mh create mode 100644 gdb/config/i386/x86-64linux.mt create mode 100644 gdb/x86-64-linux-nat.c create mode 100644 gdb/x86-64-linux-tdep.c create mode 100644 gdb/x86-64-tdep.c create mode 100644 gdb/x86-64-tdep.h diff --git a/gdb/Makefile.in b/gdb/Makefile.in index 5844aeace9..eb6b638d3d 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -1552,7 +1552,7 @@ i386-linux-tdep.o: i386-linux-tdep.c $(defs_h) $(gdbcore_h) $(frame_h) \ i386v4-nat.o: i386v4-nat.c $(defs_h) $(regcache_h) i387-tdep.o: i387-tdep.c $(floatformat_h) $(defs_h) $(gdbcore_h) \ - $(inferior_h) language.h $(regcache_h) $(doublest_h) + $(inferior_h) language.h $(regcache_h) $(doublest_h) i386-tdep.h i960-tdep.o: i960-tdep.c $(floatformat_h) $(defs_h) $(expression_h) \ $(frame_h) $(gdbtypes_h) $(symtab_h) $(value_h) $(gdbcore_h) \ @@ -2077,6 +2077,15 @@ vax-tdep.o: vax-tdep.c $(OP_INCLUDE)/vax.h $(defs_h) $(symtab_h) w65-tdep.o : w65-tdep.c $(gdbcore_h) $(regcache_h) +x86-64-linux-tdep.o : x86-64-linux-tdep.c $(defs_h) $(inferior_h) $(gdbcore_h) \ + $(regcache_h) x86-64-tdep.h i386-tdep.h + +x86-64-tdep.o : x86-64-tdep.c $(defs_h) $(inferior_h) $(gdbcore_h) $(gdbcmd_h) \ + $(arch_utils_h) $(regcache_h) $(symfile_h) x86-64-tdep.h i386-tdep.h + +x86-64-linux-tdep.o : x86-64-linux-tdep.c $(defs_h) $(inferior_h) $(gdbcore_h) \ + $(regcache_h) i387-nat.h x86-64-tdep.h i386-tdep.h + win32-nat.o: win32-nat.c $(gdbcmd_h) $(gdbcore_h) $(inferior_h) $(defs_h) \ $(gdb_string_h) $(regcache_h) $(completer_h) diff --git a/gdb/config/djgpp/fnchange.lst b/gdb/config/djgpp/fnchange.lst index 5150656923..ba8d034bcf 100644 --- a/gdb/config/djgpp/fnchange.lst +++ b/gdb/config/djgpp/fnchange.lst @@ -202,6 +202,8 @@ @V@/gdb/testsuite/gdb.mi/mi0-var-display.exp @V@/gdb/testsuite/gdb.mi/mi0vardisplay.exp @V@/gdb/tui/tuiSourceWin.c @V@/gdb/tui/tuiWinSource.c @V@/gdb/tui/tuiSourceWin.h @V@/gdb/tui/tuiWinSource.h +@V@/gdb/x86-64-linux-tdep.c @V@/gdb/x8664-ltdep.c +@V@/gdb/x86-64-linux-nat.c @V@/gdb/x8664-lnat.c @V@/intl/intlh.inst.in @V@/intl/intlh_inst.in @V@/intl/po2tbl.sed.in @V@/intl/po2tblsed.in @V@/itcl/itcl/itclConfig.sh.in @V@/itcl/itcl/itclConfig.sh-in diff --git a/gdb/config/i386/nm-x86-64.h b/gdb/config/i386/nm-x86-64.h new file mode 100644 index 0000000000..bbbea9fc6e --- /dev/null +++ b/gdb/config/i386/nm-x86-64.h @@ -0,0 +1,100 @@ +/* Native support for Linux/x86-64. + Copyright 2001 + Free Software Foundation, Inc. + Contributed by Jiri Smid, SuSE Labs. + + 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. */ + +#ifndef NM_X86_64_H +#define NM_X86_64_H + +#include "nm-linux.h" + +#define I386_USE_GENERIC_WATCHPOINTS +#include "i386/nm-i386.h" + +/* Support for 8-byte wide hw watchpoints. */ +#define TARGET_HAS_DR_LEN_8 1 + +/* Provide access to the i386 hardware debugging registers. */ + +extern void x86_64_linux_dr_set_control (unsigned long control); +#define I386_DR_LOW_SET_CONTROL(control) \ + x86_64_linux_dr_set_control (control) + +extern void x86_64_linux_dr_set_addr (int regnum, CORE_ADDR addr); +#define I386_DR_LOW_SET_ADDR(regnum, addr) \ + x86_64_linux_dr_set_addr (regnum, addr) + +extern void x86_64_linux_dr_reset_addr (int regnum); +#define I386_DR_LOW_RESET_ADDR(regnum) \ + x86_64_linux_dr_reset_addr (regnum) + +extern unsigned long x86_64_linux_dr_get_status (void); +#define I386_DR_LOW_GET_STATUS() \ + x86_64_linux_dr_get_status () + + +#define REGISTER_U_ADDR(addr, blockend, regno) \ + (addr) = x86_64_register_u_addr ((blockend),(regno)); +CORE_ADDR x86_64_register_u_addr (CORE_ADDR, int); + +/* Return the size of the user struct. */ +#define KERNEL_U_SIZE kernel_u_size() +extern int kernel_u_size (void); + +/* Offset of the registers within the user area. */ +#define U_REGS_OFFSET 0 + +/* This is the amount to subtract from u.u_ar0 + to get the offset in the core file of the register values. */ +#define KERNEL_U_ADDR 0x0 + +/* FIXME use special child_xfer_memory. */ +#define CHILD_XFER_MEMORY + +#define PTRACE_ARG3_TYPE void* + + +/* We define this if link.h is available, because with ELF we use SVR4 style + shared libraries. */ + +#ifdef HAVE_LINK_H +#define SVR4_SHARED_LIBS +#include "solib.h" /* Support for shared libraries. */ +#endif + +/* Override copies of {fetch,store}_inferior_registers in `infptrace.c'. */ +#define FETCH_INFERIOR_REGISTERS + +/* Override child_resume in `infptrace.c'. */ +#define CHILD_RESUME + +// extern int lin_lwp_prepare_to_proceed (void); +#undef PREPARE_TO_PROCEED +// #define PREPARE_TO_PROCEED(select_it) lin_lwp_prepare_to_proceed () + +extern void lin_lwp_attach_lwp (ptid_t pid, int verbose); +#define ATTACH_LWP(pid, verbose) lin_lwp_attach_lwp ((pid), (verbose)) + +#include + +extern void lin_thread_get_thread_signals (sigset_t * mask); +#define GET_THREAD_SIGNALS(mask) lin_thread_get_thread_signals (mask) + +#endif /* NM_X86_64.h */ diff --git a/gdb/config/i386/x86-64linux.mh b/gdb/config/i386/x86-64linux.mh new file mode 100644 index 0000000000..0bf109222b --- /dev/null +++ b/gdb/config/i386/x86-64linux.mh @@ -0,0 +1,11 @@ +# Host: AMD x86-64 running GNU/Linux + +XM_FILE= xm-i386.h +XDEPFILES= + +NAT_FILE= nm-x86-64.h +NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o \ + core-aout.o i386-nat.o x86-64-nat.o x86-64-linux-nat.o \ + i387-nat.o proc-service.o thread-db.o lin-lwp.o + +LOADLIBES = -ldl -rdynamic diff --git a/gdb/config/i386/x86-64linux.mt b/gdb/config/i386/x86-64linux.mt new file mode 100644 index 0000000000..be6321a773 --- /dev/null +++ b/gdb/config/i386/x86-64linux.mt @@ -0,0 +1,5 @@ +# Target: AMD x86-64 running GNU/Linux +TDEPFILES= x86-64-tdep.o x86-64-linux-tdep.o i387-tdep.o dwarf2cfi.o \ + solib.o solib-svr4.o solib-legacy.o + +GDBSERVER_DEPFILES= low-linux.o diff --git a/gdb/x86-64-linux-nat.c b/gdb/x86-64-linux-nat.c new file mode 100644 index 0000000000..268aad583b --- /dev/null +++ b/gdb/x86-64-linux-nat.c @@ -0,0 +1,563 @@ +/* Native-dependent code for Linux/x86-64. + Copyright 2001 + Free Software Foundation, Inc. + Contributed by Jiri Smid, SuSE Labs. + + 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 "regcache.h" +#include "i387-nat.h" +#include "gdb_assert.h" +#include "x86-64-tdep.h" + +#include +#include +#include +#include + +static unsigned long +x86_64_linux_dr_get (int regnum) +{ + int tid; + unsigned long value; + + /* FIXME: kettenis/2001-01-29: It's not clear what we should do with + multi-threaded processes here. For now, pretend there is just + one thread. */ + tid = PIDGET (inferior_ptid); + + /* FIXME: kettenis/2001-03-27: Calling perror_with_name if the + ptrace call fails breaks debugging remote targets. The correct + way to fix this is to add the hardware breakpoint and watchpoint + stuff to the target vectore. For now, just return zero if the + ptrace call fails. */ + errno = 0; + value = ptrace (PT_READ_U, tid, + offsetof (struct user, u_debugreg[regnum]), 0); + if (errno != 0) +#if 0 + perror_with_name ("Couldn't read debug register"); +#else + return 0; +#endif + + return value; +} + +static void +x86_64_linux_dr_set (int regnum, unsigned long value) +{ + int tid; + + /* FIXME: kettenis/2001-01-29: It's not clear what we should do with + multi-threaded processes here. For now, pretend there is just + one thread. */ + tid = PIDGET (inferior_ptid); + + errno = 0; + ptrace (PT_WRITE_U, tid, + offsetof (struct user, u_debugreg[regnum]), value); + if (errno != 0) + perror_with_name ("Couldn't write debug register"); +} + +void +x86_64_linux_dr_set_control (unsigned long control) +{ + x86_64_linux_dr_set (DR_CONTROL, control); +} + +void +x86_64_linux_dr_set_addr (int regnum, CORE_ADDR addr) +{ + gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR); + + x86_64_linux_dr_set (DR_FIRSTADDR + regnum, addr); +} + +void +x86_64_linux_dr_reset_addr (int regnum) +{ + gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR); + + x86_64_linux_dr_set (DR_FIRSTADDR + regnum, 0L); +} + +unsigned long +x86_64_linux_dr_get_status (void) +{ + return x86_64_linux_dr_get (DR_STATUS); +} + + +/* The register sets used in Linux ELF core-dumps are identical to the + register sets used by `ptrace'. */ + +#define GETREGS_SUPPLIES(regno) \ + (0 <= (regno) && (regno) <= 17) +#define GETFPREGS_SUPPLIES(regno) \ + (FP0_REGNUM <= (regno) && (regno) <= MXCSR_REGNUM) + +#define PTRACE_XFER_TYPE unsigned long + + +/* Transfering the general-purpose registers between GDB, inferiors + and core files. */ + +/* Fill GDB's register array with the general-purpose register values + in *GREGSETP. */ + +void +supply_gregset (elf_gregset_t * gregsetp) +{ + elf_greg_t *regp = (elf_greg_t *) gregsetp; + int i; + + for (i = 0; i < X86_64_NUM_GREGS; i++) + supply_register (i, (char *) (regp + x86_64_regmap[i])); +} + +/* Fill register REGNO (if it is a general-purpose register) in + *GREGSETPS with the value in GDB's register array. If REGNO is -1, + do this for all registers. */ + +void +fill_gregset (elf_gregset_t * gregsetp, int regno) +{ + elf_greg_t *regp = (elf_greg_t *) gregsetp; + int i; + + for (i = 0; i < X86_64_NUM_GREGS; i++) + if ((regno == -1 || regno == i)) + *(regp + x86_64_regmap[i]) = + *(elf_greg_t *) & registers[REGISTER_BYTE (i)]; +} + +/* Fetch all general-purpose registers from process/thread TID and + store their values in GDB's register array. */ + +static void +fetch_regs (int tid) +{ + elf_gregset_t regs; + + if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) + perror_with_name ("Couldn't get registers"); + + supply_gregset (®s); +} + +/* Store all valid general-purpose registers in GDB's register array + into the process/thread specified by TID. */ + +static void +store_regs (int tid, int regno) +{ + elf_gregset_t regs; + + if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) + perror_with_name ("Couldn't get registers"); + + fill_gregset (®s, regno); + + if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0) + perror_with_name ("Couldn't write registers"); +} + + +/* Transfering floating-point registers between GDB, inferiors and cores. */ + +/* Fill GDB's register array with the floating-point register values in + *FPREGSETP. */ + +void +supply_fpregset (elf_fpregset_t * fpregsetp) +{ + i387_supply_fxsave ((char *) fpregsetp); +} + +/* Fill register REGNO (if it is a floating-point register) in + *FPREGSETP with the value in GDB's register array. If REGNO is -1, + do this for all registers. */ + +void +fill_fpregset (elf_fpregset_t * fpregsetp, int regno) +{ + i387_fill_fxsave ((char *) fpregsetp, regno); +} + +/* Fetch all floating-point registers from process/thread TID and store + thier values in GDB's register array. */ + +static void +fetch_fpregs (int tid) +{ + elf_fpregset_t fpregs; + + if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) + perror_with_name ("Couldn't get floating point status"); + + supply_fpregset (&fpregs); +} + +/* Store all valid floating-point registers in GDB's register array + into the process/thread specified by TID. */ + +static void +store_fpregs (int tid, int regno) +{ + elf_fpregset_t fpregs; + + if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) + perror_with_name ("Couldn't get floating point status"); + + fill_fpregset (&fpregs, regno); + + if (ptrace (PTRACE_SETFPREGS, tid, 0, (long) &fpregs) < 0) + perror_with_name ("Couldn't write floating point status"); +} + + +/* Transferring arbitrary registers between GDB and inferior. */ + +/* Fetch register REGNO from the child process. If REGNO is -1, do + this for all registers (including the floating point and SSE + registers). */ + +void +fetch_inferior_registers (int regno) +{ + int tid; + + /* Linux LWP ID's are process ID's. */ + if ((tid = TIDGET (inferior_ptid)) == 0) + tid = PIDGET (inferior_ptid); /* Not a threaded program. */ + + if (regno == -1) + { + fetch_regs (tid); + fetch_fpregs (tid); + return; + } + + if (GETREGS_SUPPLIES (regno)) + { + fetch_regs (tid); + return; + } + + if (GETFPREGS_SUPPLIES (regno)) + { + fetch_fpregs (tid); + return; + } + + internal_error (__FILE__, __LINE__, + "Got request for bad register number %d.", regno); +} + +/* Store register REGNO back into the child process. If REGNO is -1, + do this for all registers (including the floating point and SSE + registers). */ +void +store_inferior_registers (int regno) +{ + int tid; + + /* Linux LWP ID's are process ID's. */ + if ((tid = TIDGET (inferior_ptid)) == 0) + tid = PIDGET (inferior_ptid); /* Not a threaded program. */ + + if (regno == -1) + { + store_regs (tid, regno); + store_fpregs (tid, regno); + return; + } + + if (GETREGS_SUPPLIES (regno)) + { + store_regs (tid, regno); + return; + } + + if (GETFPREGS_SUPPLIES (regno)) + { + store_fpregs (tid, regno); + return; + } + + internal_error (__FILE__, __LINE__, + "Got request to store bad register number %d.", regno); +} + + +static const unsigned char linux_syscall[] = { 0x0f, 0x05 }; + +#define LINUX_SYSCALL_LEN (sizeof linux_syscall) + +/* The system call number is stored in the %rax register. */ +#define LINUX_SYSCALL_REGNUM 0 /* %rax */ + +/* We are specifically interested in the sigreturn and rt_sigreturn + system calls. */ + +#ifndef SYS_sigreturn +#define SYS_sigreturn __NR_sigreturn +#endif +#ifndef SYS_rt_sigreturn +#define SYS_rt_sigreturn __NR_rt_sigreturn +#endif + +/* Offset to saved processor flags, from . */ +#define LINUX_SIGCONTEXT_EFLAGS_OFFSET (152) +/* Offset to saved processor registers from */ +#define LINUX_UCONTEXT_SIGCONTEXT_OFFSET (36) + +/* Resume execution of the inferior process. + If STEP is nonzero, single-step it. + If SIGNAL is nonzero, give it that signal. */ + +void +child_resume (ptid_t ptid, int step, enum target_signal signal) +{ + int pid = PIDGET (ptid); + int request = PTRACE_CONT; + + if (pid == -1) + /* Resume all threads. */ + /* I think this only gets used in the non-threaded case, where "resume + all threads" and "resume inferior_ptid" are the same. */ + pid = PIDGET (inferior_ptid); + + if (step) + { + CORE_ADDR pc = read_pc_pid (pid_to_ptid (pid)); + unsigned char buf[LINUX_SYSCALL_LEN]; + + request = PTRACE_SINGLESTEP; + + /* Returning from a signal trampoline is done by calling a + special system call (sigreturn or rt_sigreturn, see + i386-linux-tdep.c for more information). This system call + restores the registers that were saved when the signal was + raised, including %eflags. That means that single-stepping + won't work. Instead, we'll have to modify the signal context + that's about to be restored, and set the trace flag there. */ + + /* First check if PC is at a system call. */ + if (read_memory_nobpt (pc, (char *) buf, LINUX_SYSCALL_LEN) == 0 + && memcmp (buf, linux_syscall, LINUX_SYSCALL_LEN) == 0) + { + int syscall = + read_register_pid (LINUX_SYSCALL_REGNUM, pid_to_ptid (pid)); + + /* Then check the system call number. */ + if (syscall == SYS_rt_sigreturn) + { + CORE_ADDR sp = read_register (SP_REGNUM); + CORE_ADDR addr = sp; + unsigned long int eflags; + + addr += + sizeof (struct siginfo) + LINUX_UCONTEXT_SIGCONTEXT_OFFSET; + + /* Set the trace flag in the context that's about to be + restored. */ + addr += LINUX_SIGCONTEXT_EFLAGS_OFFSET; + read_memory (addr, (char *) &eflags, 8); + eflags |= 0x0100; + write_memory (addr, (char *) &eflags, 8); + } + } + } + + if (ptrace (request, pid, 0, target_signal_to_host (signal)) == -1) + perror_with_name ("ptrace"); +} + + +/* 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. TARGET is ignored. + + 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 mem_attrib *attrib ATTRIBUTE_UNUSED, + struct target_ops *target) +{ + register int i; + /* Round starting address down to longword boundary. */ + register CORE_ADDR addr = memaddr & -sizeof (PTRACE_XFER_TYPE); + /* Round ending address up; get number of longwords that makes. */ + register int count + = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) + / sizeof (PTRACE_XFER_TYPE); + /* Allocate buffer of that many longwords. */ + register PTRACE_XFER_TYPE *buffer + = (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE)); + + if (write) + { + /* Fill start and end extra bytes of buffer with existing memory data. */ + if (addr != memaddr || len < (int) sizeof (PTRACE_XFER_TYPE)) + { + /* Need part of initial word -- fetch it. */ + ptrace (PT_READ_I, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) addr, buffer); + } + + if (count > 1) /* FIXME, avoid if even boundary */ + { + ptrace (PT_READ_I, PIDGET (inferior_ptid), + ((PTRACE_ARG3_TYPE) + (addr + (count - 1) * sizeof (PTRACE_XFER_TYPE))), + buffer + count - 1); + } + + /* Copy data to be written over corresponding part of buffer */ + + memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), + myaddr, len); + + /* Write the entire buffer. */ + + for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) + { + errno = 0; + ptrace (PT_WRITE_D, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) addr, buffer[i]); + if (errno) + { + /* Using the appropriate one (I or D) is necessary for + Gould NP1, at least. */ + errno = 0; + ptrace (PT_WRITE_I, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) addr, buffer[i]); + } + if (errno) + return 0; + } +#ifdef CLEAR_INSN_CACHE + CLEAR_INSN_CACHE (); +#endif + } + else + { + /* Read all the longwords */ + for (i = 0; i < count; i++, addr += sizeof (PTRACE_XFER_TYPE)) + { + errno = 0; + ptrace (PT_READ_I, PIDGET (inferior_ptid), + (PTRACE_ARG3_TYPE) addr, buffer + i); + if (errno) + return 0; + } + + /* Copy appropriate bytes out of the buffer. */ + memcpy (myaddr, + (char *) buffer + (memaddr & (sizeof (PTRACE_XFER_TYPE) - 1)), + len); + } + return len; +} + +/* Interpreting register set info found in core files. */ + +/* 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, in elf_gregset_t format + 2 --- the floating-point register set, in elf_fpregset_t format + + REG_ADDR isn't used on Linux. */ + +static void +fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, + int which, CORE_ADDR reg_addr) +{ + elf_gregset_t gregset; + elf_fpregset_t fpregset; + switch (which) + { + case 0: + if (core_reg_size != sizeof (gregset)) + warning ("Wrong size gregset in core file."); + else + { + memcpy (&gregset, core_reg_sect, sizeof (gregset)); + supply_gregset (&gregset); + } + break; + + case 2: + if (core_reg_size != sizeof (fpregset)) + warning ("Wrong size fpregset in core file."); + else + { + memcpy (&fpregset, core_reg_sect, sizeof (fpregset)); + supply_fpregset (&fpregset); + } + break; + + default: + /* We've covered all the kinds of registers we know about here, + so this must be something we wouldn't know what to do with + anyway. Just ignore it. */ + break; + } +} + +/* Register that we are able to handle Linux ELF core file formats. */ + +static struct core_fns linux_elf_core_fns = { + bfd_target_elf_flavour, /* core_flavour */ + default_check_format, /* check_format */ + default_core_sniffer, /* core_sniffer */ + fetch_core_registers, /* core_read_registers */ + NULL /* next */ +}; + + +#if !defined (offsetof) +#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) +#endif + +/* Record the value of the debug control register. */ +static long debug_control_mirror; + +/* Record which address associates with which register. */ +static CORE_ADDR address_lookup[DR_LASTADDR - DR_FIRSTADDR + 1]; + +void +_initialize_x86_64_linux_nat (void) +{ + add_core_fns (&linux_elf_core_fns); +} diff --git a/gdb/x86-64-linux-tdep.c b/gdb/x86-64-linux-tdep.c new file mode 100644 index 0000000000..7a1a045f01 --- /dev/null +++ b/gdb/x86-64-linux-tdep.c @@ -0,0 +1,136 @@ +/* Target-dependent code for Linux running on x86-64, for GDB. + Copyright 2001 + Free Software Foundation, Inc. + Contributed by Jiri Smid, SuSE Labs. + + 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 "regcache.h" +#include "x86-64-tdep.h" +#include "dwarf2cfi.h" + +#define STRUCT_OFFSET(struct_type, member) \ + ((long) ((char*) &((struct_type*) 0)->member)) + +#define LINUX_SIGTRAMP_INSN0 (0x48) /* mov $NNNNNNNN,%rax */ +#define LINUX_SIGTRAMP_OFFSET0 (0) +#define LINUX_SIGTRAMP_INSN1 (0x0f) /* syscall */ +#define LINUX_SIGTRAMP_OFFSET1 (7) + +static const unsigned char linux_sigtramp_code[] = { + LINUX_SIGTRAMP_INSN0, 0xc7, 0xc0, 0x89, 0x00, 0x00, 0x00, /* mov $0x89,%rax */ + LINUX_SIGTRAMP_INSN1, 0x05 /* syscall */ +}; + +#define LINUX_SIGTRAMP_LEN (sizeof linux_sigtramp_code) + +/* If PC is in a sigtramp routine, return the address of the start of + the routine. Otherwise, return 0. */ + +static CORE_ADDR +x86_64_linux_sigtramp_start (CORE_ADDR pc) +{ + unsigned char buf[LINUX_SIGTRAMP_LEN]; + if (read_memory_nobpt (pc, (char *) buf, LINUX_SIGTRAMP_LEN) != 0) + return 0; + + if (buf[0] != LINUX_SIGTRAMP_INSN0) + { + if (buf[0] != LINUX_SIGTRAMP_INSN1) + return 0; + + pc -= LINUX_SIGTRAMP_OFFSET1; + + if (read_memory_nobpt (pc, (char *) buf, LINUX_SIGTRAMP_LEN) != 0) + return 0; + } + + if (memcmp (buf, linux_sigtramp_code, LINUX_SIGTRAMP_LEN) != 0) + return 0; + + return pc; +} + +/* Offset to struct sigcontext in ucontext, from . */ +#define LINUX_UCONTEXT_SIGCONTEXT_OFFSET (36) + +/* Assuming FRAME is for a Linux sigtramp routine, return the address + of the associated sigcontext structure. */ +CORE_ADDR +x86_64_linux_sigcontext_addr (struct frame_info *frame) +{ + CORE_ADDR pc; + + pc = x86_64_linux_sigtramp_start (frame->pc); + if (pc) + { + if (frame->next) + /* If this isn't the top frame, the next frame must be for the + signal handler itself. The sigcontext structure is part of + the user context. */ + return frame->next->frame + sizeof (struct siginfo) + + LINUX_UCONTEXT_SIGCONTEXT_OFFSET; + + + /* This is the top frame. */ + return read_register (SP_REGNUM) + sizeof (struct siginfo) + + LINUX_UCONTEXT_SIGCONTEXT_OFFSET; + + } + + error ("Couldn't recognize signal trampoline."); + return 0; +} + +/* Offset to saved PC in sigcontext, from . */ +#define LINUX_SIGCONTEXT_PC_OFFSET (136) + +/* Assuming FRAME is for a Linux sigtramp routine, return the saved + program counter. */ + +CORE_ADDR +x86_64_linux_sigtramp_saved_pc (struct frame_info *frame) +{ + CORE_ADDR addr; + + addr = x86_64_linux_sigcontext_addr (frame); + return read_memory_integer (addr + LINUX_SIGCONTEXT_PC_OFFSET, 8); +} + +/* Immediately after a function call, return the saved pc. */ + +CORE_ADDR +x86_64_linux_saved_pc_after_call (struct frame_info *frame) +{ + if (frame->signal_handler_caller) + return x86_64_linux_sigtramp_saved_pc (frame); + + return read_memory_integer (read_register (SP_REGNUM), 8); +} + +/* Saved Pc. Get it from sigcontext if within sigtramp. */ +CORE_ADDR +x86_64_linux_frame_saved_pc (struct frame_info *frame) +{ + if (frame->signal_handler_caller) + return x86_64_linux_sigtramp_saved_pc (frame); + return cfi_get_ra (frame); +} diff --git a/gdb/x86-64-tdep.c b/gdb/x86-64-tdep.c new file mode 100644 index 0000000000..d51e0e988e --- /dev/null +++ b/gdb/x86-64-tdep.c @@ -0,0 +1,1010 @@ +/* Target-dependent code for the x86-64 for GDB, the GNU debugger. + Copyright 2001 + Free Software Foundation, Inc. + Contributed by Jiri Smid, SuSE Labs. + + 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 "gdbcmd.h" +#include "arch-utils.h" +#include "regcache.h" +#include "symfile.h" +#include "x86-64-tdep.h" +#include "dwarf2cfi.h" + + +/* Register numbers of various important registers. */ +#define RAX_REGNUM 0 +#define RDX_REGNUM 1 +#define RDI_REGNUM 5 +#define EFLAGS_REGNUM 17 +#define XMM1_REGNUM 35 + +/* x86_64_register_raw_size_table[i] is the number of bytes of storage in + GDB's register array occupied by register i. */ +int x86_64_register_raw_size_table[X86_64_NUM_REGS] = { + 8, 8, 8, 8, + 8, 8, 8, 8, + 8, 8, 8, 8, + 8, 8, 8, 8, + 8, 4, + 10, 10, 10, 10, + 10, 10, 10, 10, + 4, 4, 4, 4, + 4, 4, 4, 4, + 16, 16, 16, 16, + 16, 16, 16, 16, + 16, 16, 16, 16, + 16, 16, 16, 16, + 4 +}; + +/* Number of bytes of storage in the actual machine representation for + register REGNO. */ +int +x86_64_register_raw_size (int regno) +{ + return x86_64_register_raw_size_table[regno]; +} + +/* x86_64_register_byte_table[i] is the offset into the register file of the + start of register number i. We initialize this from + x86_64_register_raw_size_table. */ +int x86_64_register_byte_table[X86_64_NUM_REGS]; + +/* Index within `registers' of the first byte of the space for register REGNO. */ +int +x86_64_register_byte (int regno) +{ + return x86_64_register_byte_table[regno]; +} + +/* Return the GDB type object for the "standard" data type of data in + register N. */ +static struct type * +x86_64_register_virtual_type (int regno) +{ + if (regno == PC_REGNUM || regno == SP_REGNUM) + return lookup_pointer_type (builtin_type_void); + if (IS_FP_REGNUM (regno)) + return builtin_type_long_double; + if (IS_SSE_REGNUM (regno)) + return builtin_type_v4sf; + if (IS_FPU_CTRL_REGNUM (regno) || regno == MXCSR_REGNUM + || regno == EFLAGS_REGNUM) + return builtin_type_int; + return builtin_type_long; +} + +/* Number of bytes of storage in the program's representation + for register REGNO. */ +int +x86_64_register_virtual_size (int regno) +{ + return (TYPE_LENGTH (x86_64_register_virtual_type (regno))); +} + +/* x86_64_register_convertible is true if register N's virtual format is + different from its raw format. Note that this definition assumes + that the host supports IEEE 32-bit floats, since it doesn't say + that SSE registers need conversion. Even if we can't find a + counterexample, this is still sloppy. */ +int +x86_64_register_convertible (int regno) +{ + return IS_FP_REGNUM (regno); +} + +/* Convert data from raw format for register REGNUM in buffer FROM to + virtual format with type TYPE in buffer TO. In principle both + formats are identical except that the virtual format has two extra + bytes appended that aren't used. We set these to zero. */ +void +x86_64_register_convert_to_virtual (int regnum, struct type *type, + char *from, char *to) +{ +/* Copy straight over, but take care of the padding. */ + memcpy (to, from, FPU_REG_RAW_SIZE); + memset (to + FPU_REG_RAW_SIZE, 0, TYPE_LENGTH (type) - FPU_REG_RAW_SIZE); +} + +/* Convert data from virtual format with type TYPE in buffer FROM to + raw format for register REGNUM in buffer TO. Simply omit the two + unused bytes. */ + +void +x86_64_register_convert_to_raw (struct type *type, int regnum, + char *from, char *to) +{ + memcpy (to, from, FPU_REG_RAW_SIZE); +} + + +/* This is the variable that is set with "set disassembly-flavour", and + its legitimate values. */ +static const char att_flavour[] = "att"; +static const char intel_flavour[] = "intel"; +static const char *valid_flavours[] = { + att_flavour, + intel_flavour, + NULL +}; +static const char *disassembly_flavour = att_flavour; + +static CORE_ADDR +x86_64_push_return_address (CORE_ADDR pc, CORE_ADDR sp) +{ + char buf[8]; + + store_unsigned_integer (buf, 8, CALL_DUMMY_ADDRESS ()); + + write_memory (sp - 8, buf, 8); + return sp - 8; +} + +void +x86_64_pop_frame (void) +{ + generic_pop_current_frame (cfi_pop_frame); +} + + +/* The returning of values is done according to the special algorithm. + Some types are returned in registers an some (big structures) in memory. + See ABI for details. + */ + +#define MAX_CLASSES 4 + +enum x86_64_reg_class +{ + X86_64_NO_CLASS, + X86_64_INTEGER_CLASS, + X86_64_INTEGERSI_CLASS, + X86_64_SSE_CLASS, + X86_64_SSESF_CLASS, + X86_64_SSEDF_CLASS, + X86_64_SSEUP_CLASS, + X86_64_X87_CLASS, + X86_64_X87UP_CLASS, + X86_64_MEMORY_CLASS +}; + +/* Return the union class of CLASS1 and CLASS2. + See the x86-64 ABI for details. */ + +static enum x86_64_reg_class +merge_classes (enum x86_64_reg_class class1, enum x86_64_reg_class class2) +{ + /* Rule #1: If both classes are equal, this is the resulting class. */ + if (class1 == class2) + return class1; + + /* Rule #2: If one of the classes is NO_CLASS, the resulting class is + the other class. */ + if (class1 == X86_64_NO_CLASS) + return class2; + if (class2 == X86_64_NO_CLASS) + return class1; + + /* Rule #3: If one of the classes is MEMORY, the result is MEMORY. */ + if (class1 == X86_64_MEMORY_CLASS || class2 == X86_64_MEMORY_CLASS) + return X86_64_MEMORY_CLASS; + + /* Rule #4: If one of the classes is INTEGER, the result is INTEGER. */ + if ((class1 == X86_64_INTEGERSI_CLASS && class2 == X86_64_SSESF_CLASS) + || (class2 == X86_64_INTEGERSI_CLASS && class1 == X86_64_SSESF_CLASS)) + return X86_64_INTEGERSI_CLASS; + if (class1 == X86_64_INTEGER_CLASS || class1 == X86_64_INTEGERSI_CLASS + || class2 == X86_64_INTEGER_CLASS || class2 == X86_64_INTEGERSI_CLASS) + return X86_64_INTEGER_CLASS; + + /* Rule #5: If one of the classes is X87 or X87UP class, MEMORY is used. */ + if (class1 == X86_64_X87_CLASS || class1 == X86_64_X87UP_CLASS + || class2 == X86_64_X87_CLASS || class2 == X86_64_X87UP_CLASS) + return X86_64_MEMORY_CLASS; + + /* Rule #6: Otherwise class SSE is used. */ + return X86_64_SSE_CLASS; +} + + +/* Classify the argument type. + CLASSES will be filled by the register class used to pass each word + of the operand. The number of words is returned. In case the parameter + should be passed in memory, 0 is returned. As a special case for zero + sized containers, classes[0] will be NO_CLASS and 1 is returned. + + See the x86-64 PS ABI for details. +*/ + +static int +classify_argument (struct type *type, + enum x86_64_reg_class classes[MAX_CLASSES], int bit_offset) +{ + int bytes = TYPE_LENGTH (type); + int words = (bytes + 8 - 1) / 8; + + switch (TYPE_CODE (type)) + { + case TYPE_CODE_ARRAY: + case TYPE_CODE_STRUCT: + case TYPE_CODE_UNION: + { + int i; + enum x86_64_reg_class subclasses[MAX_CLASSES]; + + /* On x86-64 we pass structures larger than 16 bytes on the stack. */ + if (bytes > 16) + return 0; + + for (i = 0; i < words; i++) + classes[i] = X86_64_NO_CLASS; + + /* Zero sized arrays or structures are NO_CLASS. We return 0 to + signalize memory class, so handle it as special case. */ + if (!words) + { + classes[0] = X86_64_NO_CLASS; + return 1; + } + switch (TYPE_CODE (type)) + { + case TYPE_CODE_STRUCT: + { + int j; + for (j = 0; j < type->nfields; ++j) + { + int num = classify_argument (type->fields[j].type, + subclasses, + (type->fields[j].loc.bitpos + + bit_offset) % 256); + if (!num) + return 0; + for (i = 0; i < num; i++) + { + int pos = + (type->fields[j].loc.bitpos + bit_offset) / 8 / 8; + classes[i + pos] = + merge_classes (subclasses[i], classes[i + pos]); + } + } + } + break; + case TYPE_CODE_ARRAY: + { + int num; + + num = classify_argument (type->target_type, + subclasses, bit_offset); + if (!num) + return 0; + + /* The partial classes are now full classes. */ + if (subclasses[0] == X86_64_SSESF_CLASS && bytes != 4) + subclasses[0] = X86_64_SSE_CLASS; + if (subclasses[0] == X86_64_INTEGERSI_CLASS && bytes != 4) + subclasses[0] = X86_64_INTEGER_CLASS; + + for (i = 0; i < words; i++) + classes[i] = subclasses[i % num]; + } + break; + case TYPE_CODE_UNION: + { + int j; + { + for (j = 0; j < type->nfields; ++j) + { + int num; + num = classify_argument (type->fields[j].type, + subclasses, bit_offset); + if (!num) + return 0; + for (i = 0; i < num; i++) + classes[i] = merge_classes (subclasses[i], classes[i]); + } + } + } + break; + } + /* Final merger cleanup. */ + for (i = 0; i < words; i++) + { + /* If one class is MEMORY, everything should be passed in + memory. */ + if (classes[i] == X86_64_MEMORY_CLASS) + return 0; + + /* The X86_64_SSEUP_CLASS should be always preceeded by + X86_64_SSE_CLASS. */ + if (classes[i] == X86_64_SSEUP_CLASS + && (i == 0 || classes[i - 1] != X86_64_SSE_CLASS)) + classes[i] = X86_64_SSE_CLASS; + + /* X86_64_X87UP_CLASS should be preceeded by X86_64_X87_CLASS. */ + if (classes[i] == X86_64_X87UP_CLASS + && (i == 0 || classes[i - 1] != X86_64_X87_CLASS)) + classes[i] = X86_64_SSE_CLASS; + } + return words; + } + break; + case TYPE_CODE_FLT: + switch (bytes) + { + case 4: + if (!(bit_offset % 64)) + classes[0] = X86_64_SSESF_CLASS; + else + classes[0] = X86_64_SSE_CLASS; + return 1; + case 8: + classes[0] = X86_64_SSEDF_CLASS; + return 1; + case 16: + classes[0] = X86_64_X87_CLASS; + classes[1] = X86_64_X87UP_CLASS; + return 2; + } + break; + case TYPE_CODE_INT: + case TYPE_CODE_PTR: + switch (bytes) + { + case 1: + case 2: + case 4: + case 8: + if (bytes * 8 + bit_offset <= 32) + classes[0] = X86_64_INTEGERSI_CLASS; + else + classes[0] = X86_64_INTEGER_CLASS; + return 1; + case 16: + classes[0] = classes[1] = X86_64_INTEGER_CLASS; + return 2; + default: + break; + } + case TYPE_CODE_VOID: + return 0; + } + internal_error (__FILE__, __LINE__, "classify_argument: unknown argument type"); +} + +/* Examine the argument and return set number of register required in each + class. Return 0 ifif parameter should be passed in memory. */ + +static int +examine_argument (enum x86_64_reg_class classes[MAX_CLASSES], + int n, int *int_nregs, int *sse_nregs) +{ + *int_nregs = 0; + *sse_nregs = 0; + if (!n) + return 0; + for (n--; n >= 0; n--) + switch (classes[n]) + { + case X86_64_INTEGER_CLASS: + case X86_64_INTEGERSI_CLASS: + (*int_nregs)++; + break; + case X86_64_SSE_CLASS: + case X86_64_SSESF_CLASS: + case X86_64_SSEDF_CLASS: + (*sse_nregs)++; + break; + case X86_64_NO_CLASS: + case X86_64_SSEUP_CLASS: + case X86_64_X87_CLASS: + case X86_64_X87UP_CLASS: + break; + case X86_64_MEMORY_CLASS: + internal_error (__FILE__, __LINE__, "examine_argument: unexpected memory class"); + } + return 1; +} + +#define RET_INT_REGS 2 +#define RET_SSE_REGS 2 + +/* Check if the structure in value_type is returned in registers or in + memory. If this function returns 1, gdb will call STORE_STRUCT_RETURN and + EXTRACT_STRUCT_VALUE_ADDRESS else STORE_RETURN_VALUE and EXTRACT_RETURN_VALUE + will be used. */ +int +x86_64_use_struct_convention (int gcc_p, struct type *value_type) +{ + enum x86_64_reg_class class[MAX_CLASSES]; + int n = classify_argument (value_type, class, 0); + int needed_intregs; + int needed_sseregs; + + return (!n || + !examine_argument (class, n, &needed_intregs, &needed_sseregs) || + needed_intregs > RET_INT_REGS || needed_sseregs > RET_SSE_REGS); +} + + +/* Extract from an array REGBUF containing the (raw) register state, a + function return value of TYPE, and copy that, in virtual format, + into VALBUF. */ + +void +x86_64_extract_return_value (struct type *type, char *regbuf, char *valbuf) +{ + enum x86_64_reg_class class[MAX_CLASSES]; + int n = classify_argument (type, class, 0); + int needed_intregs; + int needed_sseregs; + int intreg = 0; + int ssereg = 0; + int offset = 0; + int ret_int_r[RET_INT_REGS] = { RAX_REGNUM, RDX_REGNUM }; + int ret_sse_r[RET_SSE_REGS] = { XMM0_REGNUM, XMM1_REGNUM }; + + if (!n || + !examine_argument (class, n, &needed_intregs, &needed_sseregs) || + needed_intregs > RET_INT_REGS || needed_sseregs > RET_SSE_REGS) + { /* memory class */ + CORE_ADDR addr; + memcpy (&addr, regbuf, REGISTER_RAW_SIZE (RAX_REGNUM)); + read_memory (addr, valbuf, TYPE_LENGTH (type)); + return; + } + else + { + int i; + for (i = 0; i < n; i++) + { + switch (class[i]) + { + case X86_64_NO_CLASS: + break; + case X86_64_INTEGER_CLASS: + memcpy (valbuf + offset, + regbuf + REGISTER_BYTE (ret_int_r[(intreg + 1) / 2]), + 8); + offset += 8; + intreg += 2; + break; + case X86_64_INTEGERSI_CLASS: + memcpy (valbuf + offset, + regbuf + REGISTER_BYTE (ret_int_r[intreg / 2]), 4); + offset += 8; + intreg++; + break; + case X86_64_SSEDF_CLASS: + case X86_64_SSESF_CLASS: + case X86_64_SSE_CLASS: + memcpy (valbuf + offset, + regbuf + REGISTER_BYTE (ret_sse_r[(ssereg + 1) / 2]), + 8); + offset += 8; + ssereg += 2; + break; + case X86_64_SSEUP_CLASS: + memcpy (valbuf + offset + 8, + regbuf + REGISTER_BYTE (ret_sse_r[ssereg / 2]), 8); + offset += 8; + ssereg++; + break; + case X86_64_X87_CLASS: + memcpy (valbuf + offset, regbuf + REGISTER_BYTE (FP0_REGNUM), + 8); + offset += 8; + break; + case X86_64_X87UP_CLASS: + memcpy (valbuf + offset, + regbuf + REGISTER_BYTE (FP0_REGNUM) + 8, 8); + offset += 8; + break; + case X86_64_MEMORY_CLASS: + default: + internal_error (__FILE__, __LINE__, + "Unexpected argument class"); + } + } + } +} + +/* Handled by unwind informations. */ +static void +x86_64_frame_init_saved_regs (struct frame_info *fi) +{ +} + +#define INT_REGS 6 +#define SSE_REGS 16 + +/* Push onto the stack the specified value VALUE. Pad it correctly for + it to be an argument to a function. */ + +static CORE_ADDR +value_push (register CORE_ADDR sp, value_ptr arg) +{ + register int len = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (arg)); + register int container_len = len; + + /* How big is the container we're going to put this value in? */ + if (PARM_BOUNDARY) + container_len = ((len + PARM_BOUNDARY / TARGET_CHAR_BIT - 1) + & ~(PARM_BOUNDARY / TARGET_CHAR_BIT - 1)); + + sp -= container_len; + write_memory (sp, VALUE_CONTENTS_ALL (arg), len); + + return sp; +} + +CORE_ADDR +x86_64_push_arguments (int nargs, value_ptr *args, CORE_ADDR sp, + int struct_return, CORE_ADDR struct_addr) +{ + int intreg = 0; + int ssereg = 0; + int i; + static int int_parameter_registers[INT_REGS] = {5 /*RDI*/, 4 /*RSI*/, + 1 /*RDX*/, 2 /*RCX*/, + 8 /*R8 */, 9 /*R9 */}; + /* XMM0 - XMM15 */ + static int sse_parameter_registers[SSE_REGS] = {34, 35, 36, 37, + 38, 39, 40, 41, + 42, 43, 44, 45, + 46, 47, 48, 49}; + for (i = 0; i < nargs; i++) + { + enum x86_64_reg_class class[MAX_CLASSES]; + int n = classify_argument (args[i]->type, class, 0); + int needed_intregs; + int needed_sseregs; + + if (!n || + !examine_argument (class, n, &needed_intregs, &needed_sseregs) + || intreg + needed_intregs > INT_REGS + || ssereg + needed_sseregs > SSE_REGS) + { /* memory class */ + sp = value_push (sp, args[i]); + } + else + { + int j; + for (j = 0; j < n; j++) + { + int offset = 0; + switch (class[j]) + { + case X86_64_NO_CLASS: + break; + case X86_64_INTEGER_CLASS: + write_register_gen (int_parameter_registers[(intreg + 1) / 2], + VALUE_CONTENTS_ALL (args[i]) + offset); + offset += 8; + intreg += 2; + break; + case X86_64_INTEGERSI_CLASS: + write_register_gen (int_parameter_registers[intreg / 2], + VALUE_CONTENTS_ALL (args[i]) + offset); + offset += 8; + intreg++; + break; + case X86_64_SSEDF_CLASS: + case X86_64_SSESF_CLASS: + case X86_64_SSE_CLASS: + write_register_gen (sse_parameter_registers[(ssereg + 1) / 2], + VALUE_CONTENTS_ALL (args[i]) + offset); + offset += 8; + ssereg += 2; + break; + case X86_64_SSEUP_CLASS: + write_register_gen (sse_parameter_registers[ssereg / 2], + VALUE_CONTENTS_ALL (args[i]) + offset); + offset += 8; + ssereg++; + break; + case X86_64_X87_CLASS: + case X86_64_X87UP_CLASS: + case X86_64_MEMORY_CLASS: + sp = value_push (sp, args[i]); + break; + default: + internal_error (__FILE__, __LINE__, + "Unexpected argument class"); + } + intreg += intreg % 2; + ssereg += ssereg % 2; + } + } + } + return sp; +} + +/* Write into the appropriate registers a function return value stored + in VALBUF of type TYPE, given in virtual format. */ +void +x86_64_store_return_value (struct type *type, char *valbuf) +{ + int len = TYPE_LENGTH (type); + + if (TYPE_CODE_FLT == TYPE_CODE (type)) + { + /* Floating-point return values can be found in %st(0). */ + if (len == TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT + && TARGET_LONG_DOUBLE_FORMAT == &floatformat_i387_ext) + { + /* Copy straight over. */ + write_register_bytes (REGISTER_BYTE (FP0_REGNUM), valbuf, + FPU_REG_RAW_SIZE); + } + else + { + char buf[FPU_REG_RAW_SIZE]; + DOUBLEST val; + + /* Convert the value found in VALBUF to the extended + floating point format used by the FPU. This is probably + not exactly how it would happen on the target itself, but + it is the best we can do. */ + val = extract_floating (valbuf, TYPE_LENGTH (type)); + floatformat_from_doublest (&floatformat_i387_ext, &val, buf); + write_register_bytes (REGISTER_BYTE (FP0_REGNUM), buf, + FPU_REG_RAW_SIZE); + } + } + else + { + int low_size = REGISTER_RAW_SIZE (0); + int high_size = REGISTER_RAW_SIZE (1); + + if (len <= low_size) + write_register_bytes (REGISTER_BYTE (0), valbuf, len); + else if (len <= (low_size + high_size)) + { + write_register_bytes (REGISTER_BYTE (0), valbuf, low_size); + write_register_bytes (REGISTER_BYTE (1), + valbuf + low_size, len - low_size); + } + else + internal_error (__FILE__, __LINE__, + "Cannot store return value of %d bytes long.", len); + } +} + + +static char * +x86_64_register_name (int reg_nr) +{ + static char *register_names[] = { + "rax", "rdx", "rcx", "rbx", + "rsi", "rdi", "rbp", "rsp", + "r8", "r9", "r10", "r11", + "r12", "r13", "r14", "r15", + "rip", "eflags", + "st0", "st1", "st2", "st3", + "st4", "st5", "st6", "st7", + "fctrl", "fstat", "ftag", "fiseg", + "fioff", "foseg", "fooff", "fop", + "xmm0", "xmm1", "xmm2", "xmm3", + "xmm4", "xmm5", "xmm6", "xmm7", + "xmm8", "xmm9", "xmm10", "xmm11", + "xmm12", "xmm13", "xmm14", "xmm15", + "mxcsr" + }; + if (reg_nr < 0) + return NULL; + if (reg_nr >= (sizeof (register_names) / sizeof (*register_names))) + return NULL; + return register_names[reg_nr]; +} + + + +/* We have two flavours of disassembly. The machinery on this page + deals with switching between those. */ + +static int +gdb_print_insn_x86_64 (bfd_vma memaddr, disassemble_info * info) +{ + if (disassembly_flavour == att_flavour) + return print_insn_i386_att (memaddr, info); + else if (disassembly_flavour == intel_flavour) + return print_insn_i386_intel (memaddr, info); + /* Never reached -- disassembly_flavour is always either att_flavour + or intel_flavour. */ + internal_error (__FILE__, __LINE__, "failed internal consistency check"); +} + + +/* Store the address of the place in which to copy the structure the + subroutine will return. This is called from call_function. */ +void +x86_64_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) +{ + write_register (RDI_REGNUM, addr); +} + +int +x86_64_frameless_function_invocation (struct frame_info *frame) +{ + return 0; +} + +/* On x86_64 there are no reasonable prologs. */ +CORE_ADDR +x86_64_skip_prologue (CORE_ADDR pc) +{ + return pc; +} + +/* Sequence of bytes for breakpoint instruction. */ +static unsigned char * +x86_64_breakpoint_from_pc (CORE_ADDR *pc, int *lenptr) +{ + static unsigned char breakpoint[] = { 0xcc }; + *lenptr = 1; + return breakpoint; +} + +static struct gdbarch * +i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) +{ + struct gdbarch *gdbarch; + struct gdbarch_tdep *tdep; + + /* Find a candidate among the list of pre-declared architectures. */ + for (arches = gdbarch_list_lookup_by_info (arches, &info); + arches != NULL; + arches = gdbarch_list_lookup_by_info (arches->next, &info)) + { + switch (info.bfd_arch_info->mach) + { + case bfd_mach_x86_64: + case bfd_mach_x86_64_intel_syntax: + switch (gdbarch_bfd_arch_info (arches->gdbarch)->mach) + { + case bfd_mach_x86_64: + case bfd_mach_x86_64_intel_syntax: + return arches->gdbarch; + case bfd_mach_i386_i386: + case bfd_mach_i386_i8086: + case bfd_mach_i386_i386_intel_syntax: + break; + default: + internal_error (__FILE__, __LINE__, + "i386_gdbarch_init: unknown machine type"); + } + break; + case bfd_mach_i386_i386: + case bfd_mach_i386_i8086: + case bfd_mach_i386_i386_intel_syntax: + switch (gdbarch_bfd_arch_info (arches->gdbarch)->mach) + { + case bfd_mach_x86_64: + case bfd_mach_x86_64_intel_syntax: + break; + case bfd_mach_i386_i386: + case bfd_mach_i386_i8086: + case bfd_mach_i386_i386_intel_syntax: + return arches->gdbarch; + default: + internal_error (__FILE__, __LINE__, + "i386_gdbarch_init: unknown machine type"); + } + break; + default: + internal_error (__FILE__, __LINE__, + "i386_gdbarch_init: unknown machine type"); + } + } + + tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); + gdbarch = gdbarch_alloc (&info, tdep); + + switch (info.bfd_arch_info->mach) + { + case bfd_mach_x86_64: + case bfd_mach_x86_64_intel_syntax: + tdep->last_fpu_regnum = 25; + tdep->first_xmm_regnum = 34; + tdep->last_xmm_regnum = 49; + tdep->mxcsr_regnum = 50; + tdep->first_fpu_ctrl_regnum = 26; + break; + case bfd_mach_i386_i386: + case bfd_mach_i386_i8086: + case bfd_mach_i386_i386_intel_syntax: + /* This is place for definition of i386 target vector. */ + break; + default: + internal_error (__FILE__, __LINE__, + "i386_gdbarch_init: unknown machine type"); + } + + set_gdbarch_long_bit (gdbarch, 64); + set_gdbarch_long_long_bit (gdbarch, 64); + set_gdbarch_ptr_bit (gdbarch, 64); + + set_gdbarch_long_double_format (gdbarch, &floatformat_i387_ext); + set_gdbarch_ieee_float (gdbarch, 1); + + + set_gdbarch_num_regs (gdbarch, X86_64_NUM_REGS); + set_gdbarch_register_name (gdbarch, x86_64_register_name); + set_gdbarch_register_size (gdbarch, 8); + set_gdbarch_register_raw_size (gdbarch, x86_64_register_raw_size); + set_gdbarch_max_register_raw_size (gdbarch, 16); + set_gdbarch_register_byte (gdbarch, x86_64_register_byte); + /* Total amount of space needed to store our copies of the machine's register + (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS) */ + set_gdbarch_register_bytes (gdbarch, + (18 * 8) + (8 * 10) + (8 * 4) + (8 * 16 + 4)); + set_gdbarch_register_virtual_size (gdbarch, x86_64_register_virtual_size); + set_gdbarch_max_register_virtual_size (gdbarch, 16); + + set_gdbarch_register_virtual_type (gdbarch, x86_64_register_virtual_type); + + set_gdbarch_register_convertible (gdbarch, x86_64_register_convertible); + set_gdbarch_register_convert_to_virtual (gdbarch, + x86_64_register_convert_to_virtual); + set_gdbarch_register_convert_to_raw (gdbarch, + x86_64_register_convert_to_raw); + +/* Register numbers of various important registers. */ + set_gdbarch_sp_regnum (gdbarch, 7); /* (rsp) Contains address of top of stack. */ + set_gdbarch_fp_regnum (gdbarch, 6); /* (rbp) */ + set_gdbarch_pc_regnum (gdbarch, 16); /* (rip) Contains program counter. */ + + set_gdbarch_fp0_regnum (gdbarch, 18); /* First FPU floating-point register. */ + + set_gdbarch_read_fp (gdbarch, cfi_read_fp); + set_gdbarch_write_fp (gdbarch, cfi_write_fp); + +/* Discard from the stack the innermost frame, restoring all registers. */ + set_gdbarch_pop_frame (gdbarch, x86_64_pop_frame); + + /* FRAME_CHAIN takes a frame's nominal address and produces the frame's + chain-pointer. */ + set_gdbarch_frame_chain (gdbarch, cfi_frame_chain); + + set_gdbarch_frameless_function_invocation (gdbarch, + x86_64_frameless_function_invocation); + set_gdbarch_frame_saved_pc (gdbarch, x86_64_linux_frame_saved_pc); + + set_gdbarch_frame_args_address (gdbarch, default_frame_address); + set_gdbarch_frame_locals_address (gdbarch, default_frame_address); + +/* Return number of bytes at start of arglist that are not really args. */ + set_gdbarch_frame_args_skip (gdbarch, 8); + + set_gdbarch_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs); + +/* Frame pc initialization is handled by unwind informations. */ + set_gdbarch_init_frame_pc (gdbarch, cfi_init_frame_pc); + +/* Initialization of unwind informations. */ + set_gdbarch_init_extra_frame_info (gdbarch, cfi_init_extra_frame_info); + +/* Getting saved registers is handled by unwind informations. */ + set_gdbarch_get_saved_register (gdbarch, cfi_get_saved_register); + + set_gdbarch_frame_init_saved_regs (gdbarch, x86_64_frame_init_saved_regs); + +/* Cons up virtual frame pointer for trace */ + set_gdbarch_virtual_frame_pointer (gdbarch, cfi_virtual_frame_pointer); + + + set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid); + + set_gdbarch_use_generic_dummy_frames (gdbarch, 1); + set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); + set_gdbarch_call_dummy_address (gdbarch, entry_point_address); + set_gdbarch_call_dummy_length (gdbarch, 0); + set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); + set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); + set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point); + set_gdbarch_call_dummy_words (gdbarch, 0); + set_gdbarch_sizeof_call_dummy_words (gdbarch, 0); + set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); + set_gdbarch_call_dummy_p (gdbarch, 1); + set_gdbarch_call_dummy_start_offset (gdbarch, 0); + set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); + set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy); + set_gdbarch_push_return_address (gdbarch, x86_64_push_return_address); + set_gdbarch_push_arguments (gdbarch, x86_64_push_arguments); + +/* Return number of args passed to a frame, no way to tell. */ + set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); +/* Don't use default structure extract routine */ + set_gdbarch_extract_struct_value_address (gdbarch, 0); + +/* If USE_STRUCT_CONVENTION retruns 0, then gdb uses STORE_RETURN_VALUE + and EXTRACT_RETURN_VALUE to store/fetch the functions return value. It is + the case when structure is returned in registers. */ + set_gdbarch_use_struct_convention (gdbarch, x86_64_use_struct_convention); + +/* Store the address of the place in which to copy the structure the + subroutine will return. This is called from call_function. */ + set_gdbarch_store_struct_return (gdbarch, x86_64_store_struct_return); + +/* Extract from an array REGBUF containing the (raw) register state + a function return value of type TYPE, and copy that, in virtual format, + into VALBUF. */ + set_gdbarch_extract_return_value (gdbarch, x86_64_extract_return_value); + + +/* Write into the appropriate registers a function return value stored + in VALBUF of type TYPE, given in virtual format. */ + set_gdbarch_store_return_value (gdbarch, x86_64_store_return_value); + + +/* Offset from address of function to start of its code. */ + set_gdbarch_function_start_offset (gdbarch, 0); + + set_gdbarch_skip_prologue (gdbarch, x86_64_skip_prologue); + + set_gdbarch_saved_pc_after_call (gdbarch, x86_64_linux_saved_pc_after_call); + + set_gdbarch_inner_than (gdbarch, core_addr_lessthan); + + set_gdbarch_breakpoint_from_pc (gdbarch, x86_64_breakpoint_from_pc); + + +/* Amount PC must be decremented by after a breakpoint. This is often the + number of bytes in BREAKPOINT but not always. */ + set_gdbarch_decr_pc_after_break (gdbarch, 1); + + return gdbarch; +} + +void +_initialize_x86_64_tdep (void) +{ + register_gdbarch_init (bfd_arch_i386, i386_gdbarch_init); + + /* Initialize the table saying where each register starts in the + register file. */ + { + int i, offset; + + offset = 0; + for (i = 0; i < X86_64_NUM_REGS; i++) + { + x86_64_register_byte_table[i] = offset; + offset += x86_64_register_raw_size_table[i]; + } + } + + tm_print_insn = gdb_print_insn_x86_64; + tm_print_insn_info.mach = bfd_lookup_arch (bfd_arch_i386, 3)->mach; + + /* Add the variable that controls the disassembly flavour. */ + { + struct cmd_list_element *new_cmd; + + new_cmd = add_set_enum_cmd ("disassembly-flavour", no_class, + valid_flavours, &disassembly_flavour, "\ +Set the disassembly flavour, the valid values are \"att\" and \"intel\", \ +and the default value is \"att\".", &setlist); + add_show_from_set (new_cmd, &showlist); + } +} diff --git a/gdb/x86-64-tdep.h b/gdb/x86-64-tdep.h new file mode 100644 index 0000000000..d04da8be33 --- /dev/null +++ b/gdb/x86-64-tdep.h @@ -0,0 +1,49 @@ +/* Target-dependent code for GDB, the GNU debugger. + Copyright 2001 + Free Software Foundation, Inc. + Contributed by Jiri Smid, SuSE Labs. + + 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. */ + +#ifndef X86_64_TDEP_H +#define X86_64_TDEP_H + +#include "i386-tdep.h" +#include + +/* Mapping between the general-purpose registers in `struct user' + format and GDB's register array layout. */ + +static int x86_64_regmap[] = { + RAX, RDX, RCX, RBX, + RSI, RDI, RBP, RSP, + R8, R9, R10, R11, + R12, R13, R14, R15, + RIP, EFLAGS +}; + +/* Number of all registers */ +#define X86_64_NUM_REGS (51) + +/* Number of general registers. */ +#define X86_64_NUM_GREGS (18) + +gdbarch_frame_saved_pc_ftype x86_64_linux_frame_saved_pc; +gdbarch_saved_pc_after_call_ftype x86_64_linux_saved_pc_after_call; + +#endif -- 2.34.1