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* nlm/i386.c, nlm/i386.h: New files that contain i386 specific code.

This commit is contained in:
J.T. Conklin 1994-08-19 00:06:47 +00:00
parent f494527192
commit ef4b379aab
3 changed files with 105 additions and 0 deletions
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4
gdb/ChangeLog
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Thu Aug 18 17:01:35 1994 J.T. Conklin (jtc@rtl.cygnus.com)
* nlm/i386.c, nlm/i386.h: New files that contain i386 specific code.
Thu Aug 18 14:39:46 1994 Stan Shebs (shebs@andros.cygnus.com)
* README: Grammar improvements, clarifications, updates.

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gdb/nlm/i386.c Normal file
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#include "i386.h"
/* Get the registers out of the frame information. */
static void
frame_to_registers (frame, regs)
struct StackFrame *frame;
char *regs;
{
/* Copy EAX -> EDI */
mem2hex (&frame->ExceptionEAX, &regs[0 * 4 * 2], 4 * 8, 0);
/* Copy EIP & PS */
mem2hex (&frame->ExceptionPC, &regs[8 * 4 * 2], 4 * 2, 0);
/* Copy CS, SS, DS */
mem2hex (&frame->ExceptionCS, &regs[10 * 4 * 2], 4 * 3, 0);
/* Copy ES */
mem2hex (&frame->ExceptionES, &regs[13 * 4 * 2], 4 * 1, 0);
/* Copy FS & GS */
mem2hex (&frame->ExceptionFS, &regs[14 * 4 * 2], 4 * 2, 0);
}
/* Put the registers back into the frame information. */
static void
registers_to_frame (regs, frame)
char *regs;
struct StackFrame *frame;
{
/* Copy EAX -> EDI */
hex2mem (&regs[0 * 4 * 2], &frame->ExceptionEAX, 4 * 8, 0);
/* Copy EIP & PS */
hex2mem (&regs[8 * 4 * 2], &frame->ExceptionPC, 4 * 2, 0);
/* Copy CS, SS, DS */
hex2mem (&regs[10 * 4 * 2], &frame->ExceptionCS, 4 * 3, 0);
/* Copy ES */
hex2mem (&regs[13 * 4 * 2], &frame->ExceptionES, 4 * 1, 0);
/* Copy FS & GS */
hex2mem (&regs[14 * 4 * 2], &frame->ExceptionFS, 4 * 2, 0);
}
static void
set_step_traps (frame)
struct StackFrame *frame;
{
frame->ExceptionSystemFlags |= 0x100;
}
static void
clear_step_traps (frame)
struct StackFrame *frame;
{
frame->ExceptionSystemFlags &= ~0x100;
}
static void
do_status (ptr, frame)
char *ptr;
struct StackFrame *frame;
{
int sigval;
sigval = computeSignal (frame->ExceptionNumber);
sprintf (ptr, "T%02x", sigval);
ptr += 3;
sprintf (ptr, "%02x:", PC_REGNUM);
ptr = mem2hex (&frame->ExceptionPC, ptr + 3, 4, 0);
*ptr++ = ';';
sprintf (ptr, "%02x:", SP_REGNUM);
ptr = mem2hex (&frame->ExceptionESP, ptr + 3, 4, 0);
*ptr++ = ';';
sprintf (ptr, "%02x:", FP_REGNUM);
ptr = mem2hex (&frame->ExceptionEBP, ptr + 3, 4, 0);
*ptr++ = ';';
*ptr = '\000';
}

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gdb/nlm/i386.h Normal file
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/* Register values. All of these values *MUST* agree with tm.h */
#define SP_REGNUM 4 /* Contains address of top of stack */
#define PC_REGNUM 8 /* Contains program counter */
#define FP_REGNUM 5 /* Virtual frame pointer */
#define NUM_REGS 16 /* Number of machine registers */
#define REGISTER_BYTES (NUM_REGS * 4) /* Total size of registers array */
#define ExceptionPC ExceptionEIP
#define DECR_PC_AFTER_BREAK 1 /* int 3 leaves PC pointing after insn */
#define BREAKPOINT {0xcc}
#define BREAKPOINT_SIZE (sizeof breakpoint_insn)
#define StackFrame T_TSS_StackFrame