/* Native-dependent code for GNU/Linux x86-64.
- Copyright 2001, 2002 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
Contributed by Jiri Smid, SuSE Labs.
#include "inferior.h"
#include "gdbcore.h"
#include "regcache.h"
+#include "linux-nat.h"
+
#include "gdb_assert.h"
#include "gdb_string.h"
-#include "x86-64-tdep.h"
-
#include <sys/ptrace.h>
#include <sys/debugreg.h>
#include <sys/syscall.h>
#include <sys/procfs.h>
+#include <asm/prctl.h>
+/* FIXME ezannoni-2003-07-09: we need <sys/reg.h> to be included after
+ <asm/ptrace.h> because the latter redefines FS and GS for no apparent
+ reason, and those definitions don't match the ones that libpthread_db
+ uses, which come from <sys/reg.h>. */
+/* ezannoni-2003-07-09: I think this is fixed. The extraneous defs have
+ been removed from ptrace.h in the kernel. However, better safe than
+ sorry. */
+#include <asm/ptrace.h>
#include <sys/reg.h>
+#include "gdb_proc_service.h"
-/* Mapping between the general-purpose registers in `struct user'
- format and GDB's register array layout. */
-
-static int x86_64_regmap[] = {
- RAX, RBX, RCX, RDX,
- RSI, RDI, RBP, RSP,
- R8, R9, R10, R11,
- R12, R13, R14, R15,
- RIP, EFLAGS, CS, SS,
- DS, ES, FS, GS
-};
-
-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);
+/* Prototypes for supply_gregset etc. */
+#include "gregset.h"
- /* 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");
-}
+#include "x86-64-tdep.h"
+#include "x86-64-linux-tdep.h"
+#include "i386-linux-tdep.h"
+#include "amd64-nat.h"
-void
-x86_64_linux_dr_set_control (unsigned long control)
-{
- x86_64_linux_dr_set (DR_CONTROL, control);
-}
+/* Mapping between the general-purpose registers in GNU/Linux x86-64
+ `struct user' format and GDB's register cache layout. */
-void
-x86_64_linux_dr_set_addr (int regnum, CORE_ADDR addr)
+static int x86_64_linux_gregset64_reg_offset[] =
{
- gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
-
- x86_64_linux_dr_set (DR_FIRSTADDR + regnum, addr);
-}
+ RAX * 8, RBX * 8, /* %rax, %rbx */
+ RCX * 8, RDX * 8, /* %rcx, %rdx */
+ RSI * 8, RDI * 8, /* %rsi, %rdi */
+ RBP * 8, RSP * 8, /* %rbp, %rsp */
+ R8 * 8, R9 * 8, /* %r8 ... */
+ R10 * 8, R11 * 8,
+ R12 * 8, R13 * 8,
+ R14 * 8, R15 * 8, /* ... %r15 */
+ RIP * 8, EFLAGS * 8, /* %rip, %eflags */
+ DS * 8, ES * 8, /* %ds, %es */
+ FS * 8, GS * 8 /* %fs, %gs */
+};
+\f
-void
-x86_64_linux_dr_reset_addr (int regnum)
-{
- gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
+/* Mapping between the general-purpose registers in GNU/Linux x86-64
+ `struct user' format and GDB's register cache layout for GNU/Linux
+ i386.
- x86_64_linux_dr_set (DR_FIRSTADDR + regnum, 0L);
-}
+ Note that most GNU/Linux x86-64 registers are 64-bit, while the
+ GNU/Linux i386 registers are all 32-bit, but since we're
+ little-endian we get away with that. */
-unsigned long
-x86_64_linux_dr_get_status (void)
+/* From <sys/reg.h> on GNU/Linux i386. */
+static int x86_64_linux_gregset32_reg_offset[] =
{
- return x86_64_linux_dr_get (DR_STATUS);
-}
-\f
+ 10 * 8, 11 * 8, /* %eax, %ecx */
+ 12 * 8, 13 * 8, /* %edx, %ebx */
+ 19 * 8, 4 * 8, /* %esp, %ebp */
+ 13 * 8, 14 * 8, /* %esi, %edi */
+ 16 * 8, 18 * 8, /* %eip, %eflags */
+ 17 * 8, 20 * 8, /* %cs, %ss */
+ 23 * 8, 24 * 8, /* %ds, %es */
+ 25 * 4, 26 * 4, /* %fs, %gs */
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ 15 * 8 /* "orig_eax" */
+};
-/* The register sets used in GNU/Linux ELF core-dumps are identical to
- the register sets used by `ptrace'. */
+/* Which ptrace request retrieves which registers?
+ These apply to the corresponding SET requests as well. */
-#define GETREGS_SUPPLIES(regno) \
- (0 <= (regno) && (regno) < x86_64_num_gregs)
#define GETFPREGS_SUPPLIES(regno) \
(FP0_REGNUM <= (regno) && (regno) <= MXCSR_REGNUM)
\f
/* Transfering the general-purpose registers between GDB, inferiors
and core files. */
-/* Fill GDB's register array with the general-purpose register values
+/* Fill GDB's register cache with the general-purpose register values
in *GREGSETP. */
void
-supply_gregset (elf_gregset_t * gregsetp)
+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]));
+ amd64_supply_native_gregset (current_regcache, gregsetp, -1);
}
-/* Fill register REGNO (if it is a general-purpose register) in
- *GREGSETPS with the value in GDB's register array. If REGNO is -1,
+/* Fill register REGNUM (if it is a general-purpose register) in
+ *GREGSETP with the value in GDB's register cache. If REGNUM is -1,
do this for all registers. */
void
-fill_gregset (elf_gregset_t * gregsetp, int regno)
+fill_gregset (elf_gregset_t *gregsetp, int regnum)
{
- elf_greg_t *regp = (elf_greg_t *) gregsetp;
- int i;
-
- for (i = 0; i < x86_64_num_gregs; i++)
- if ((regno == -1 || regno == i))
- read_register_gen (i, (char *) (regp + x86_64_regmap[i]));
+ amd64_collect_native_gregset (current_regcache, gregsetp, regnum);
}
/* Fetch all general-purpose registers from process/thread TID and
- store their values in GDB's register array. */
+ store their values in GDB's register cache. */
static void
fetch_regs (int tid)
supply_gregset (®s);
}
-/* Store all valid general-purpose registers in GDB's register array
+/* Store all valid general-purpose registers in GDB's register cache
into the process/thread specified by TID. */
static void
-store_regs (int tid, int regno)
+store_regs (int tid, int regnum)
{
elf_gregset_t regs;
if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0)
perror_with_name ("Couldn't get registers");
- fill_gregset (®s, regno);
+ fill_gregset (®s, regnum);
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. */
-static void *
-x86_64_fxsave_offset (elf_fpregset_t * fxsave, int regnum)
-{
- const char *reg_name;
- int reg_index;
-
- gdb_assert (x86_64_num_gregs - 1 < regnum && regnum < x86_64_num_regs);
-
- reg_name = x86_64_register_name (regnum);
-
- if (reg_name[0] == 's' && reg_name[1] == 't')
- {
- reg_index = reg_name[2] - '0';
- return &fxsave->st_space[reg_index * 2];
- }
-
- if (reg_name[0] == 'x' && reg_name[1] == 'm' && reg_name[2] == 'm')
- {
- reg_index = reg_name[3] - '0';
- return &fxsave->xmm_space[reg_index * 4];
- }
-
- if (strcmp (reg_name, "mxcsr") == 0)
- return &fxsave->mxcsr;
-
- return NULL;
-}
-
-/* Fill GDB's register array with the floating-point and SSE register
- values in *FXSAVE. This function masks off any of the reserved
- bits in *FXSAVE. */
+/* Fill GDB's register cache with the floating-point and SSE register
+ values in *FPREGSETP. */
void
-supply_fpregset (elf_fpregset_t * fxsave)
+supply_fpregset (elf_fpregset_t *fpregsetp)
{
- int i, reg_st0, reg_mxcsr;
-
- reg_st0 = x86_64_register_number ("st0");
- reg_mxcsr = x86_64_register_number ("mxcsr");
-
- gdb_assert (reg_st0 > 0 && reg_mxcsr > reg_st0);
-
- for (i = reg_st0; i <= reg_mxcsr; i++)
- supply_register (i, x86_64_fxsave_offset (fxsave, i));
+ x86_64_supply_fxsave (current_regcache, -1, fpregsetp);
}
/* Fill register REGNUM (if it is a floating-point or SSE register) in
- *FXSAVE with the value in GDB's register array. If REGNUM is -1, do
- this for all registers. This function doesn't touch any of the
- reserved bits in *FXSAVE. */
+ *FPREGSETP with the value in GDB's register cache. If REGNUM is
+ -1, do this for all registers. */
void
-fill_fpregset (elf_fpregset_t * fxsave, int regnum)
+fill_fpregset (elf_fpregset_t *fpregsetp, int regnum)
{
- int i, last_regnum = MXCSR_REGNUM;
- void *ptr;
-
- if (gdbarch_tdep (current_gdbarch)->num_xmm_regs == 0)
- last_regnum = FOP_REGNUM;
-
- for (i = FP0_REGNUM; i <= last_regnum; i++)
- if (regnum == -1 || regnum == i)
- {
- ptr = x86_64_fxsave_offset (fxsave, i);
- if (ptr)
- regcache_collect (i, ptr);
- }
+ x86_64_fill_fxsave ((char *) fpregsetp, regnum);
}
/* Fetch all floating-point registers from process/thread TID and store
- thier values in GDB's register array. */
+ thier values in GDB's register cache. */
static void
fetch_fpregs (int tid)
supply_fpregset (&fpregs);
}
-/* Store all valid floating-point registers in GDB's register array
+/* Store all valid floating-point registers in GDB's register cache
into the process/thread specified by TID. */
static void
-store_fpregs (int tid, int regno)
+store_fpregs (int tid, int regnum)
{
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);
+ fill_fpregset (&fpregs, regnum);
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
+/* Fetch register REGNUM from the child process. If REGNUM is -1, do
this for all registers (including the floating point and SSE
registers). */
void
-fetch_inferior_registers (int regno)
+fetch_inferior_registers (int regnum)
{
int tid;
/* GNU/Linux LWP ID's are process ID's. */
- if ((tid = TIDGET (inferior_ptid)) == 0)
- tid = PIDGET (inferior_ptid); /* Not a threaded program. */
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
+ tid = PIDGET (inferior_ptid); /* Not a threaded program. */
- if (regno == -1)
+ if (regnum == -1 || amd64_native_gregset_supplies_p (regnum))
{
fetch_regs (tid);
- fetch_fpregs (tid);
- return;
- }
-
- if (GETREGS_SUPPLIES (regno))
- {
- fetch_regs (tid);
- return;
+ if (regnum != -1)
+ return;
}
- if (GETFPREGS_SUPPLIES (regno))
+ if (regnum == -1 || GETFPREGS_SUPPLIES (regnum))
{
fetch_fpregs (tid);
return;
}
internal_error (__FILE__, __LINE__,
- "Got request for bad register number %d.", regno);
+ "Got request for bad register number %d.", regnum);
}
-/* Store register REGNO back into the child process. If REGNO is -1,
- do this for all registers (including the floating point and SSE
+/* Store register REGNUM back into the child process. If REGNUM is
+ -1, do this for all registers (including the floating-point and SSE
registers). */
+
void
-store_inferior_registers (int regno)
+store_inferior_registers (int regnum)
{
int tid;
/* GNU/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;
- }
+ tid = TIDGET (inferior_ptid);
+ if (tid == 0)
+ tid = PIDGET (inferior_ptid); /* Not a threaded program. */
- if (GETREGS_SUPPLIES (regno))
+ if (regnum == -1 || amd64_native_gregset_supplies_p (regnum))
{
- store_regs (tid, regno);
- return;
+ store_regs (tid, regnum);
+ if (regnum != -1)
+ return;
}
- if (GETFPREGS_SUPPLIES (regno))
+ if (regnum == -1 || GETFPREGS_SUPPLIES (regnum))
{
- store_fpregs (tid, regno);
+ store_fpregs (tid, regnum);
return;
}
internal_error (__FILE__, __LINE__,
- "Got request to store bad register number %d.", regno);
+ "Got request to store bad register number %d.", regnum);
}
\f
-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 */
+static unsigned long
+x86_64_linux_dr_get (int regnum)
+{
+ int tid;
+ unsigned long value;
-/* We are specifically interested in the sigreturn and rt_sigreturn
- system calls. */
+ /* 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);
-#ifndef SYS_sigreturn
-#define SYS_sigreturn __NR_sigreturn
-#endif
-#ifndef SYS_rt_sigreturn
-#define SYS_rt_sigreturn __NR_rt_sigreturn
+ /* 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
-/* Offset to saved processor flags, from <asm/sigcontext.h>. */
-#define LINUX_SIGCONTEXT_EFLAGS_OFFSET (152)
-/* Offset to saved processor registers from <asm/ucontext.h> */
-#define LINUX_UCONTEXT_SIGCONTEXT_OFFSET (36)
-
-/* Interpreting register set info found in core files. */
-/* Provide registers to GDB from a core file.
+ return value;
+}
- 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.
+static void
+x86_64_linux_dr_set (int regnum, unsigned long value)
+{
+ int tid;
- 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
+ /* 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);
- REG_ADDR isn't used on GNU/Linux. */
+ 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");
+}
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
- int which, CORE_ADDR reg_addr)
+void
+x86_64_linux_dr_set_control (unsigned long control)
{
- 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;
+ x86_64_linux_dr_set (DR_CONTROL, control);
+}
- 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;
+void
+x86_64_linux_dr_set_addr (int regnum, CORE_ADDR addr)
+{
+ gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR);
- 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;
- }
+ x86_64_linux_dr_set (DR_FIRSTADDR + regnum, addr);
}
-/* Register that we are able to handle GNU/Linux ELF core file formats. */
+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);
+}
-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 */
-};
+unsigned long
+x86_64_linux_dr_get_status (void)
+{
+ return x86_64_linux_dr_get (DR_STATUS);
+}
\f
-#if !defined (offsetof)
-#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
+ps_err_e
+ps_get_thread_area (const struct ps_prochandle *ph,
+ lwpid_t lwpid, int idx, void **base)
+{
+/* This definition comes from prctl.h, but some kernels may not have it. */
+#ifndef PTRACE_ARCH_PRCTL
+#define PTRACE_ARCH_PRCTL 30
#endif
-/* Return the address of register REGNUM. BLOCKEND is the value of
- u.u_ar0, which should point to the registers. */
-CORE_ADDR
-x86_64_register_u_addr (CORE_ADDR blockend, int regnum)
-{
- struct user u;
- CORE_ADDR fpstate;
- CORE_ADDR ubase;
- ubase = blockend;
- if (IS_FP_REGNUM (regnum))
- {
- fpstate = ubase + ((char *) &u.i387.st_space - (char *) &u);
- return (fpstate + 16 * (regnum - FP0_REGNUM));
- }
- else if (IS_SSE_REGNUM (regnum))
+ /* FIXME: ezannoni-2003-07-09 see comment above about include file order.
+ We could be getting bogus values for these two. */
+ gdb_assert (FS < ELF_NGREG);
+ gdb_assert (GS < ELF_NGREG);
+ switch (idx)
{
- fpstate = ubase + ((char *) &u.i387.xmm_space - (char *) &u);
- return (fpstate + 16 * (regnum - XMM0_REGNUM));
+ case FS:
+ if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0)
+ return PS_OK;
+ break;
+ case GS:
+ if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0)
+ return PS_OK;
+ break;
+ default: /* Should not happen. */
+ return PS_BADADDR;
}
- else
- return (ubase + 8 * x86_64_regmap[regnum]);
+ return PS_ERR; /* ptrace failed. */
}
+\f
void
-_initialize_x86_64_linux_nat (void)
+child_post_startup_inferior (ptid_t ptid)
{
- add_core_fns (&linux_elf_core_fns);
+ i386_cleanup_dregs ();
+ linux_child_post_startup_inferior (ptid);
}
+\f
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_x86_64_linux_nat (void);
-int
-kernel_u_size (void)
+void
+_initialize_x86_64_linux_nat (void)
{
- return (sizeof (struct user));
+ amd64_native_gregset32_reg_offset = x86_64_linux_gregset32_reg_offset;
+ amd64_native_gregset32_num_regs = I386_LINUX_NUM_REGS;
+ amd64_native_gregset64_reg_offset = x86_64_linux_gregset64_reg_offset;
+
+ gdb_assert (ARRAY_SIZE (x86_64_linux_gregset32_reg_offset)
+ == amd64_native_gregset32_num_regs);
+ gdb_assert (ARRAY_SIZE (x86_64_linux_gregset64_reg_offset)
+ == amd64_native_gregset64_num_regs);
}
projects / deliverable / binutils-gdb.git / blobdiff