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-rw-r--r--gdb/gdbserver/linux-low.c513
1 files changed, 40 insertions, 473 deletions
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index 368c3f2..4c29316 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -31,22 +31,15 @@
#include <sys/ioctl.h>
#include <fcntl.h>
#include <string.h>
-
-/***************Begin MY defs*********************/
-static char my_registers[REGISTER_BYTES];
-char *registers = my_registers;
-/***************End MY defs*********************/
-
-#ifdef HAVE_SYS_REG_H
-#include <sys/reg.h>
-#endif
+#include <stdlib.h>
+#include <unistd.h>
#define PTRACE_ARG3_TYPE long
#define PTRACE_XFER_TYPE int
extern int errno;
-
-static void initialize_arch (void);
+extern int num_regs;
+extern int regmap[];
/* Start an inferior process and returns its pid.
ALLARGS is a vector of program-name and args. */
@@ -156,432 +149,23 @@ myresume (int step, int signal)
perror_with_name ("ptrace");
}
-
-#if !defined (offsetof)
-#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
-#endif
-
-/* U_REGS_OFFSET is the offset of the registers within the u area. */
-#if !defined (U_REGS_OFFSET)
-#define U_REGS_OFFSET \
- ptrace (PT_READ_U, inferior_pid, \
- (PTRACE_ARG3_TYPE) (offsetof (struct user, u_ar0)), 0) \
- - KERNEL_U_ADDR
-#endif
-
-#ifdef I386_GNULINUX_TARGET
-/* This module only supports access to the general purpose registers.
- Adjust the relevant constants accordingly.
-
- FIXME: kettenis/2001-03-28: We should really use PTRACE_GETREGS to
- get at the registers. Better yet, we should try to share code with
- i386-linux-nat.c. */
-#undef NUM_FREGS
-#define NUM_FREGS 0
-#undef NUM_REGS
-#define NUM_REGS NUM_GREGS
-
-/* This stuff comes from i386-tdep.c. */
-
-/* i386_register_byte[i] is the offset into the register file of the
- start of register number i. We initialize this from
- i386_register_raw_size. */
-int i386_register_byte[MAX_NUM_REGS];
-
-/* i386_register_raw_size[i] is the number of bytes of storage in
- GDB's register array occupied by register i. */
-int i386_register_raw_size[MAX_NUM_REGS] = {
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 4, 4, 4, 4,
- 4, 4, 4, 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,
- 4
-};
-
-static void
-initialize_arch (void)
-{
- /* Initialize the table saying where each register starts in the
- register file. */
- {
- int i, offset;
-
- offset = 0;
- for (i = 0; i < MAX_NUM_REGS; i++)
- {
- i386_register_byte[i] = offset;
- offset += i386_register_raw_size[i];
- }
- }
-}
-
-/* This stuff comes from i386-linux-nat.c. */
-
-/* Mapping between the general-purpose registers in `struct user'
- format and GDB's register array layout. */
-static int regmap[] =
-{
- EAX, ECX, EDX, EBX,
- UESP, EBP, ESI, EDI,
- EIP, EFL, CS, SS,
- DS, ES, FS, GS
-};
-
-/* Return the address of register REGNUM. BLOCKEND is the value of
- u.u_ar0, which should point to the registers. */
-
-CORE_ADDR
-register_u_addr (CORE_ADDR blockend, int regnum)
-{
- return (blockend + 4 * regmap[regnum]);
-}
-#elif defined(TARGET_M68K)
-static void
-initialize_arch (void)
-{
- return;
-}
-
-/* This table must line up with REGISTER_NAMES in tm-m68k.h */
-static int regmap[] =
-{
-#ifdef PT_D0
- PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
- PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
- PT_SR, PT_PC,
-#else
- 14, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15,
- 17, 18,
-#endif
-#ifdef PT_FP0
- PT_FP0, PT_FP1, PT_FP2, PT_FP3, PT_FP4, PT_FP5, PT_FP6, PT_FP7,
- PT_FPCR, PT_FPSR, PT_FPIAR
-#else
- 21, 24, 27, 30, 33, 36, 39, 42, 45, 46, 47
-#endif
-};
-
-/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
- is stored. */
+#define REGISTER_RAW_SIZE(regno) register_size((regno))
int
-m68k_linux_register_u_addr (int blockend, int regnum)
-{
- return (blockend + 4 * regmap[regnum]);
-}
-#elif defined(IA64_GNULINUX_TARGET)
-#undef NUM_FREGS
-#define NUM_FREGS 0
-
-#include <asm/ptrace_offsets.h>
-
-static int u_offsets[] =
- {
- /* general registers */
- -1, /* gr0 not available; i.e, it's always zero */
- 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,
- /* gr32 through gr127 not directly available via the ptrace interface */
- -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, -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, -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, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- /* Floating point registers */
- -1, -1, /* f0 and f1 not available (f0 is +0.0 and f1 is +1.0) */
- PT_F2,
- PT_F3,
- PT_F4,
- PT_F5,
- PT_F6,
- PT_F7,
- PT_F8,
- PT_F9,
- PT_F10,
- PT_F11,
- PT_F12,
- PT_F13,
- PT_F14,
- PT_F15,
- PT_F16,
- PT_F17,
- PT_F18,
- PT_F19,
- PT_F20,
- PT_F21,
- PT_F22,
- PT_F23,
- PT_F24,
- PT_F25,
- PT_F26,
- PT_F27,
- PT_F28,
- PT_F29,
- PT_F30,
- PT_F31,
- PT_F32,
- PT_F33,
- PT_F34,
- PT_F35,
- PT_F36,
- PT_F37,
- PT_F38,
- PT_F39,
- PT_F40,
- PT_F41,
- PT_F42,
- PT_F43,
- PT_F44,
- PT_F45,
- PT_F46,
- PT_F47,
- PT_F48,
- PT_F49,
- PT_F50,
- PT_F51,
- PT_F52,
- PT_F53,
- PT_F54,
- PT_F55,
- PT_F56,
- PT_F57,
- PT_F58,
- PT_F59,
- PT_F60,
- PT_F61,
- PT_F62,
- PT_F63,
- PT_F64,
- PT_F65,
- PT_F66,
- PT_F67,
- PT_F68,
- PT_F69,
- PT_F70,
- PT_F71,
- PT_F72,
- PT_F73,
- PT_F74,
- PT_F75,
- PT_F76,
- PT_F77,
- PT_F78,
- PT_F79,
- PT_F80,
- PT_F81,
- PT_F82,
- PT_F83,
- PT_F84,
- PT_F85,
- PT_F86,
- PT_F87,
- PT_F88,
- PT_F89,
- PT_F90,
- PT_F91,
- PT_F92,
- PT_F93,
- PT_F94,
- PT_F95,
- PT_F96,
- PT_F97,
- PT_F98,
- PT_F99,
- PT_F100,
- PT_F101,
- PT_F102,
- PT_F103,
- PT_F104,
- PT_F105,
- PT_F106,
- PT_F107,
- PT_F108,
- PT_F109,
- PT_F110,
- PT_F111,
- PT_F112,
- PT_F113,
- PT_F114,
- PT_F115,
- PT_F116,
- PT_F117,
- PT_F118,
- PT_F119,
- PT_F120,
- PT_F121,
- PT_F122,
- PT_F123,
- PT_F124,
- PT_F125,
- PT_F126,
- PT_F127,
- /* predicate registers - we don't fetch these individually */
- -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, -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, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1,
- /* branch registers */
- PT_B0,
- PT_B1,
- PT_B2,
- PT_B3,
- PT_B4,
- PT_B5,
- PT_B6,
- PT_B7,
- /* virtual frame pointer and virtual return address pointer */
- -1, -1,
- /* other registers */
- PT_PR,
- PT_CR_IIP, /* ip */
- PT_CR_IPSR, /* psr */
- PT_CFM, /* cfm */
- /* kernel registers not visible via ptrace interface (?) */
- -1, -1, -1, -1, -1, -1, -1, -1,
- /* hole */
- -1, -1, -1, -1, -1, -1, -1, -1,
- PT_AR_RSC,
- PT_AR_BSP,
- PT_AR_BSPSTORE,
- PT_AR_RNAT,
- -1,
- -1, /* Not available: FCR, IA32 floating control register */
- -1, -1,
- -1, /* Not available: EFLAG */
- -1, /* Not available: CSD */
- -1, /* Not available: SSD */
- -1, /* Not available: CFLG */
- -1, /* Not available: FSR */
- -1, /* Not available: FIR */
- -1, /* Not available: FDR */
- -1,
- PT_AR_CCV,
- -1, -1, -1,
- PT_AR_UNAT,
- -1, -1, -1,
- PT_AR_FPSR,
- -1, -1, -1,
- -1, /* Not available: ITC */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1,
- PT_AR_PFS,
- PT_AR_LC,
- -1, /* Not available: EC, the Epilog Count register */
- -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, -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,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1,
- /* nat bits - not fetched directly; instead we obtain these bits from
- either rnat or unat or from memory. */
- -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, -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, -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, -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, -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, -1, -1, -1,
- };
-
-int
-ia64_register_u_addr (int blockend, int regnum)
+register_addr (int regnum)
{
int addr;
- if (regnum < 0 || regnum >= NUM_REGS)
+ if (regnum < 0 || regnum >= num_regs)
error ("Invalid register number %d.", regnum);
- addr = u_offsets[regnum];
+ addr = regmap[regnum];
if (addr == -1)
addr = 0;
return addr;
}
-static void
-initialize_arch (void)
-{
- return;
-}
-
-#elif defined(ARM_GNULINUX_TARGET)
-int arm_register_u_addr(blockend, regnum)
- int blockend;
- int regnum;
-{
- return blockend + REGISTER_BYTE(regnum);
-}
-
-static void
-initialize_arch ()
-{
-}
-#endif
-
-CORE_ADDR
-register_addr (int regno, CORE_ADDR blockend)
-{
- CORE_ADDR addr;
-
- if (regno < 0 || regno >= NUM_REGS)
- error ("Invalid register number %d.", regno);
-
- REGISTER_U_ADDR (addr, blockend, regno);
-
- return addr;
-}
-
/* Fetch one register. */
static void
@@ -590,16 +174,18 @@ fetch_register (int regno)
CORE_ADDR regaddr;
register int i;
- /* Offset of registers within the u area. */
- unsigned int offset;
-
- offset = U_REGS_OFFSET;
+ if (regno >= num_regs)
+ return;
+ if (cannot_fetch_register (regno))
+ return;
- regaddr = register_addr (regno, offset);
+ regaddr = register_addr (regno);
+ if (regaddr == -1)
+ return;
for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
{
errno = 0;
- *(PTRACE_XFER_TYPE *) &registers[REGISTER_BYTE (regno) + i] =
+ *(PTRACE_XFER_TYPE *) (register_data (regno) + i) =
ptrace (PTRACE_PEEKUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, 0);
regaddr += sizeof (PTRACE_XFER_TYPE);
if (errno != 0)
@@ -622,7 +208,7 @@ void
fetch_inferior_registers (int regno)
{
if (regno == -1 || regno == 0)
- for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++)
+ for (regno = 0; regno < num_regs; regno++)
fetch_register (regno);
else
fetch_register (regno);
@@ -637,62 +223,43 @@ store_inferior_registers (int regno)
{
CORE_ADDR regaddr;
int i;
- unsigned int offset = U_REGS_OFFSET;
if (regno >= 0)
{
-#if 0
- if (CANNOT_STORE_REGISTER (regno))
+ if (regno >= num_regs)
+ return;
+
+ if (cannot_store_register (regno))
+ return;
+
+ regaddr = register_addr (regno);
+ if (regaddr == -1)
return;
-#endif
- regaddr = register_addr (regno, offset);
errno = 0;
-#if 0
- if (regno == PCOQ_HEAD_REGNUM || regno == PCOQ_TAIL_REGNUM)
+ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
{
- scratch = *(int *) &registers[REGISTER_BYTE (regno)] | 0x3;
- ptrace (PT_WUREGS, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
- scratch, 0);
+ errno = 0;
+ ptrace (PTRACE_POKEUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
+ *(int *) (register_data (regno) + i));
if (errno != 0)
{
- /* Error, even if attached. Failing to write these two
- registers is pretty serious. */
- sprintf (buf, "writing register number %d", regno);
- perror_with_name (buf);
+ /* Warning, not error, in case we are attached; sometimes the
+ kernel doesn't let us at the registers. */
+ char *err = strerror (errno);
+ char *msg = alloca (strlen (err) + 128);
+ sprintf (msg, "writing register %d: %s",
+ regno, err);
+ error (msg);
+ return;
}
+ regaddr += sizeof (int);
}
- else
-#endif
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
- {
- errno = 0;
- ptrace (PTRACE_POKEUSER, inferior_pid, (PTRACE_ARG3_TYPE) regaddr,
- *(int *) &registers[REGISTER_BYTE (regno) + i]);
- if (errno != 0)
- {
- /* Warning, not error, in case we are attached; sometimes the
- kernel doesn't let us at the registers. */
- char *err = strerror (errno);
- char *msg = alloca (strlen (err) + 128);
- sprintf (msg, "writing register %d: %s",
- regno, err);
- error (msg);
- return;
- }
- regaddr += sizeof (int);
- }
}
else
- for (regno = 0; regno < NUM_REGS - NUM_FREGS; regno++)
+ for (regno = 0; regno < num_regs; regno++)
store_inferior_registers (regno);
}
-/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
- in the NEW_SUN_PTRACE case.
- It ought to be straightforward. But it appears that writing did
- not write the data that I specified. I cannot understand where
- it got the data that it actually did write. */
-
/* Copy LEN bytes from inferior's memory starting at MEMADDR
to debugger memory starting at MYADDR. */
@@ -772,5 +339,5 @@ write_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len)
void
initialize_low (void)
{
- initialize_arch ();
+ init_registers ();
}
generated by cgit v1.1 at 2024-12-21 06:31:23 +0000