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Add process recording support to the moxie gdb port.

This commit is contained in:
Anthony Green 2009-07-13 04:56:14 +00:00
parent d990c8ab76
commit 451fa05e5d
2 changed files with 458 additions and 2 deletions
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7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2009-07-13 Anthony Green <green@moxielogic.com>
* moxie-tdep.c (moxie_gdbarch_init): Call
set_gdbarch_process_record.
(moxie_process_record): New.
(moxie_process_readu): New.
2009-07-12 Michael Snyder <msnyder@vmware.com>
* i386-tdep.c: Add a frame unwinder for function epilogues.

453
gdb/moxie-tdep.c
View File

@ -36,6 +36,7 @@
#include "regcache.h"
#include "trad-frame.h"
#include "dis-asm.h"
#include "record.h"
#include "gdb_assert.h"
@ -71,7 +72,7 @@ moxie_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
/* Implement the "breakpoint_from_pc" gdbarch method. */
const static unsigned char *
moxie_breakpoint_from_pc (struct gdbarch *gdbarch,
moxie_breakpoint_from_pc (struct gdbarch *gdbarch,
CORE_ADDR *pcptr, int *lenptr)
{
static unsigned char breakpoint[] = { 0x35, 0x00 };
@ -287,7 +288,7 @@ moxie_write_pc (struct regcache *regcache, CORE_ADDR val)
regcache_cooked_write_unsigned (regcache, MOXIE_PC_REGNUM, val);
}
/* Implement the "unwind_pc" gdbarch method. */
/* Implement the "unwind_sp" gdbarch method. */
static CORE_ADDR
moxie_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
@ -474,6 +475,450 @@ moxie_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
return frame_id_build (sp, get_frame_pc (this_frame));
}
/* Read an unsigned integer from the inferior, and adjust
endianess. */
static ULONGEST
moxie_process_readu (CORE_ADDR addr, char *buf,
int length, enum bfd_endian byte_order)
{
if (target_read_memory (addr, buf, length))
{
if (record_debug)
printf_unfiltered (_("Process record: error reading memory at "
"addr 0x%s len = %d.\n"),
paddress (target_gdbarch, addr), length);
return -1;
}
return extract_unsigned_integer (buf, length, byte_order);
}
/* Parse the current instruction and record the values of the registers and
memory that will be changed in current instruction to "record_arch_list".
Return -1 if something wrong. */
int
moxie_process_record (struct gdbarch *gdbarch, struct regcache *regcache,
CORE_ADDR addr)
{
gdb_byte buf[4];
uint16_t inst;
uint32_t tmpu32;
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
if (record_debug > 1)
fprintf_unfiltered (gdb_stdlog, "Process record: moxie_process_record "
"addr = 0x%s\n",
paddress (target_gdbarch, addr));
inst = (uint16_t) moxie_process_readu (addr, buf, 2, byte_order);
/* Decode instruction. */
if (inst & (1 << 15))
{
if (inst & (1 << 14))
{
/* This is a Form 3 instruction. */
int opcode = (inst >> 10 & 0xf);
switch (opcode)
{
case 0x00: /* beq */
case 0x01: /* bne */
case 0x02: /* blt */
case 0x03: /* bgt */
case 0x04: /* bltu */
case 0x05: /* bgtu */
case 0x06: /* bge */
case 0x07: /* ble */
case 0x08: /* bgeu */
case 0x09: /* bleu */
/* Do nothing. */
break;
default:
{
/* Do nothing. */
break;
}
}
}
else
{
/* This is a Form 2 instruction. */
int opcode = (inst >> 12 & 0x3);
switch (opcode)
{
case 0x00: /* inc */
case 0x01: /* dec */
case 0x02: /* gsr */
{
int reg = (inst >> 8) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x03: /* ssr */
{
/* Do nothing until GDB learns about moxie's special
registers. */
}
break;
default:
/* Do nothing. */
break;
}
}
}
else
{
/* This is a Form 1 instruction. */
int opcode = inst >> 8;
switch (opcode)
{
case 0x00: /* nop */
/* Do nothing. */
break;
case 0x01: /* ldi.l (immediate) */
case 0x02: /* mov (register-to-register) */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x03: /* jsra */
{
regcache_raw_read (regcache,
MOXIE_SP_REGNUM, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
if (record_arch_list_add_reg (regcache, MOXIE_FP_REGNUM)
|| (record_arch_list_add_reg (regcache,
MOXIE_SP_REGNUM))
|| record_arch_list_add_mem (tmpu32 - 12, 12))
return -1;
}
break;
case 0x04: /* ret */
{
if (record_arch_list_add_reg (regcache, MOXIE_FP_REGNUM)
|| (record_arch_list_add_reg (regcache,
MOXIE_SP_REGNUM)))
return -1;
}
break;
case 0x05: /* add.l */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x06: /* push */
{
int reg = (inst >> 4) & 0xf;
regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
if (record_arch_list_add_reg (regcache, reg)
|| record_arch_list_add_mem (tmpu32 - 4, 4))
return -1;
}
break;
case 0x07: /* pop */
{
int a = (inst >> 4) & 0xf;
int b = inst & 0xf;
if (record_arch_list_add_reg (regcache, a)
|| record_arch_list_add_reg (regcache, b))
return -1;
}
break;
case 0x08: /* lda.l */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x09: /* sta.l */
{
tmpu32 = (uint32_t) moxie_process_readu (addr+2, buf,
4, byte_order);
if (record_arch_list_add_mem (tmpu32, 4))
return -1;
}
break;
case 0x0a: /* ld.l (register indirect) */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x0b: /* st.l */
{
int reg = (inst >> 4) & 0xf;
regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
if (record_arch_list_add_mem (tmpu32, 4))
return -1;
}
break;
case 0x0c: /* ldo.l */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x0d: /* sto.l */
{
int reg = (inst >> 4) & 0xf;
uint32_t offset = (uint32_t) moxie_process_readu (addr+2, buf, 4,
byte_order);
regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
tmpu32 += offset;
if (record_arch_list_add_mem (tmpu32, 4))
return -1;
}
break;
case 0x0e: /* cmp */
{
if (record_arch_list_add_reg (regcache, MOXIE_CC_REGNUM))
return -1;
}
break;
case 0x0f:
case 0x10:
case 0x11:
case 0x12:
case 0x13:
case 0x14:
case 0x15:
case 0x16:
case 0x17:
case 0x18:
{
/* Do nothing. */
break;
}
case 0x19: /* jsr */
{
regcache_raw_read (regcache,
MOXIE_SP_REGNUM, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
if (record_arch_list_add_reg (regcache, MOXIE_FP_REGNUM)
|| (record_arch_list_add_reg (regcache,
MOXIE_SP_REGNUM))
|| record_arch_list_add_mem (tmpu32 - 12, 12))
return -1;
}
break;
case 0x1a: /* jmpa */
{
/* Do nothing. */
}
break;
case 0x1b: /* ldi.b (immediate) */
case 0x1c: /* ld.b (register indirect) */
case 0x1d: /* lda.b */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x1e: /* st.b */
{
int reg = (inst >> 4) & 0xf;
regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
if (record_arch_list_add_mem (tmpu32, 1))
return -1;
}
break;
case 0x1f: /* sta.b */
{
tmpu32 = moxie_process_readu (addr+2, (char *) buf,
4, byte_order);
if (record_arch_list_add_mem (tmpu32, 1))
return -1;
}
break;
case 0x20: /* ldi.s (immediate) */
case 0x21: /* ld.s (register indirect) */
case 0x22: /* lda.s */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x23: /* st.s */
{
int reg = (inst >> 4) & 0xf;
regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
if (record_arch_list_add_mem (tmpu32, 2))
return -1;
}
break;
case 0x24: /* sta.s */
{
tmpu32 = moxie_process_readu (addr+2, (char *) buf,
4, byte_order);
if (record_arch_list_add_mem (tmpu32, 2))
return -1;
}
break;
case 0x25: /* jmp */
{
/* Do nothing. */
}
break;
case 0x26: /* and */
case 0x27: /* lshr */
case 0x28: /* ashl */
case 0x29: /* sub.l */
case 0x2a: /* neg */
case 0x2b: /* or */
case 0x2c: /* not */
case 0x2d: /* ashr */
case 0x2e: /* xor */
case 0x2f: /* mul.l */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x30: /* swi */
{
/* We currently implement support for libgloss'
system calls. */
int inum = moxie_process_readu (addr+2, (char *) buf,
4, byte_order);
switch (inum)
{
case 0x1: /* SYS_exit */
{
/* Do nothing. */
}
break;
case 0x2: /* SYS_open */
{
if (record_arch_list_add_reg (regcache, RET1_REGNUM))
return -1;
}
break;
case 0x4: /* SYS_read */
{
uint32_t length, ptr;
/* Read buffer pointer is in $r1. */
regcache_raw_read (regcache, 3, (gdb_byte *) & ptr);
ptr = extract_unsigned_integer ((gdb_byte *) & ptr,
4, byte_order);
/* String length is at 0x12($fp) */
regcache_raw_read (regcache,
MOXIE_FP_REGNUM, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
length = moxie_process_readu (tmpu32+20, (char *) buf,
4, byte_order);
if (record_arch_list_add_mem (ptr, length))
return -1;
}
break;
case 0x5: /* SYS_write */
{
if (record_arch_list_add_reg (regcache, RET1_REGNUM))
return -1;
}
break;
default:
break;
}
}
break;
case 0x31: /* div.l */
case 0x32: /* udiv.l */
case 0x33: /* mod.l */
case 0x34: /* umod.l */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x35: /* brk */
/* Do nothing. */
break;
case 0x36: /* ldo.b */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x37: /* sto.b */
{
int reg = (inst >> 4) & 0xf;
uint32_t offset = (uint32_t) moxie_process_readu (addr+2, buf, 4,
byte_order);
regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
tmpu32 += offset;
if (record_arch_list_add_mem (tmpu32, 1))
return -1;
}
break;
case 0x38: /* ldo.s */
{
int reg = (inst >> 4) & 0xf;
if (record_arch_list_add_reg (regcache, reg))
return -1;
}
break;
case 0x39: /* sto.s */
{
int reg = (inst >> 4) & 0xf;
uint32_t offset = (uint32_t) moxie_process_readu (addr+2, buf, 4,
byte_order);
regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32);
tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32,
4, byte_order);
tmpu32 += offset;
if (record_arch_list_add_mem (tmpu32, 2))
return -1;
}
break;
default:
/* Do nothing. */
break;
}
}
if (record_arch_list_add_reg (regcache, MOXIE_PC_REGNUM))
return -1;
if (record_arch_list_add_end ())
return -1;
return 0;
}
/* Allocate and initialize the moxie gdbarch object. */
static struct gdbarch *
@ -497,6 +942,7 @@ moxie_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
set_gdbarch_num_regs (gdbarch, MOXIE_NUM_REGS);
set_gdbarch_sp_regnum (gdbarch, MOXIE_SP_REGNUM);
set_gdbarch_pc_regnum (gdbarch, MOXIE_PC_REGNUM);
set_gdbarch_register_name (gdbarch, moxie_register_name);
set_gdbarch_register_type (gdbarch, moxie_register_type);
@ -527,6 +973,9 @@ moxie_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
/* Support simple overlay manager. */
set_gdbarch_overlay_update (gdbarch, simple_overlay_update);
/* Support reverse debugging. */
set_gdbarch_process_record (gdbarch, moxie_process_record);
return gdbarch;
}