Differential D29174 Diff 86551 sys/amd64/amd64/gdb_machdep.c

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sys/amd64/amd64/gdb_machdep.c

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#include <machine/psl.h>		#include <machine/psl.h>
#include <machine/reg.h>		#include <machine/reg.h>
#include <machine/specialreg.h>		#include <machine/specialreg.h>
#include <machine/trap.h>		#include <machine/trap.h>
#include <machine/frame.h>		#include <machine/frame.h>
#include <machine/endian.h>		#include <machine/endian.h>

#include <gdb/gdb.h>		#include <gdb/gdb.h>
		#include <gdb/gdb_int.h>

void *		void *
gdb_cpu_getreg(int regnum, size_t *regsz)		gdb_cpu_getreg(int regnum, size_t *regsz)
{		{
static uint32_t _kcodesel = GSEL(GCODE_SEL, SEL_KPL);		static uint32_t _kcodesel = GSEL(GCODE_SEL, SEL_KPL);
static uint32_t _kdatasel = GSEL(GDATA_SEL, SEL_KPL);		static uint32_t _kdatasel = GSEL(GDATA_SEL, SEL_KPL);

*regsz = gdb_cpu_regsz(regnum);		*regsz = gdb_cpu_regsz(regnum);
▲ Show 20 Lines • Show All 85 Lines • ▼ Show 20 Lines	gdb_cpu_signal(int type, int code)
case T_NMI: return (SIGTRAP);		case T_NMI: return (SIGTRAP);
case T_FPOPFLT: return (SIGILL);		case T_FPOPFLT: return (SIGILL);
case T_TSSFLT: return (SIGSEGV);		case T_TSSFLT: return (SIGSEGV);
case T_SEGNPFLT: return (SIGSEGV);		case T_SEGNPFLT: return (SIGSEGV);
case T_STKFLT: return (SIGSEGV);		case T_STKFLT: return (SIGSEGV);
case T_XMMFLT: return (SIGFPE);		case T_XMMFLT: return (SIGFPE);
}		}
return (SIGEMT);		return (SIGEMT);
		}

		void
		gdb_cpu_stop_reason(int type, int code)
		{
		uintmax_t val;

		val = 0;
		if (type == T_TRCTRAP) {
		/* NB: 'code' contains the value of dr6 at the trap. */
		if ((code & DBREG_DR6_B(0)) != 0) {
		val = rdr0();
		}
		if ((code & DBREG_DR6_B(1)) != 0) {
		val = rdr1();
		}
		if ((code & DBREG_DR6_B(2)) != 0) {
		val = rdr2();
		}
		if ((code & DBREG_DR6_B(3)) != 0) {
		val = rdr3();
		}

		/*
		* TODO: validate the bits in DR7 to differentiate between a
		* watchpoint trap and a hardware breakpoint trap (currently
		* unsupported).
		*/
		if (val != 0) {
		gdb_tx_str("watch:");
		gdb_tx_varhex(val);
		gdb_tx_char(';');
		}
		}
}		}

void *		void *
gdb_begin_write(void)		gdb_begin_write(void)
{		{

return (disable_wp() ? &gdb_begin_write : NULL);		return (disable_wp() ? &gdb_begin_write : NULL);
}		}

void		void
gdb_end_write(void *arg)		gdb_end_write(void *arg)
{		{

restore_wp(arg != NULL);		restore_wp(arg != NULL);
}		}