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* arm-linux-tdep.c (arm_linux_thumb2_be_breakpoint)

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(arm_linux_thumb2_le_breakpoint): New constants.
	(arm_linux_init_abi): Set thumb2_breakpoint and
	thumb2_breakpoint_size.
	* arm-tdep.c (thumb_insn_size, thumb_advance_itstate): New functions.
	(thumb_get_next_pc): Add a comment.  Rename IT to ITSTATE.
	Implement support for single stepping through IT blocks if
	a 32-bit Thumb breakpoint instruction is available.
	(arm_breakpoint_from_pc): If a 32-bit Thumb breakpoint instruction
	is available, use it when needed.
	(arm_remote_breakpoint_from_pc): New function.
	(arm_gdbarch_init): Register arm_remote_breakpoint_from_pc.
	* arm-tdep.h (struct gdbarch_tdep): Correct thumb_breakpoint
	comment.  Add thumb2_breakpoint and thumb2_breakpoint_size.

	gdbserver/
	* linux-arm-low.c (thumb_breakpoint_len): Delete.
	(thumb2_breakpoint): New.
	(arm_breakpoint_at): Check for Thumb-2 breakpoints.

	testsuite/
	* gdb.arch/thumb2-it.S, gdb.arch/thumb2-it.exp: New files.
This commit is contained in:
Daniel Jacobowitz
2010-02-01 16:13:17 +00:00
parent a1dcb23a28
commit 177321bd85
9 changed files with 494 additions and 11 deletions
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11
gdb/arm-linux-tdep.c
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@@ -74,6 +74,14 @@ static const char arm_linux_thumb_be_breakpoint[] = {0xde, 0x01};
static const char arm_linux_thumb_le_breakpoint[] = {0x01, 0xde};
/* Because the 16-bit Thumb breakpoint is affected by Thumb-2 IT blocks,
we must use a length-appropriate breakpoint for 32-bit Thumb
instructions. See also thumb_get_next_pc. */
static const char arm_linux_thumb2_be_breakpoint[] = { 0xf7, 0xf0, 0xa0, 0x00 };
static const char arm_linux_thumb2_le_breakpoint[] = { 0xf0, 0xf7, 0x00, 0xa0 };
/* Description of the longjmp buffer. */
#define ARM_LINUX_JB_ELEMENT_SIZE INT_REGISTER_SIZE
#define ARM_LINUX_JB_PC 21
@@ -851,6 +859,7 @@ arm_linux_init_abi (struct gdbarch_info info,
else
tdep->arm_breakpoint = arm_linux_arm_be_breakpoint;
tdep->thumb_breakpoint = arm_linux_thumb_be_breakpoint;
tdep->thumb2_breakpoint = arm_linux_thumb2_be_breakpoint;
}
else
{
@@ -859,9 +868,11 @@ arm_linux_init_abi (struct gdbarch_info info,
else
tdep->arm_breakpoint = arm_linux_arm_le_breakpoint;
tdep->thumb_breakpoint = arm_linux_thumb_le_breakpoint;
tdep->thumb2_breakpoint = arm_linux_thumb2_le_breakpoint;
}
tdep->arm_breakpoint_size = sizeof (arm_linux_arm_le_breakpoint);
tdep->thumb_breakpoint_size = sizeof (arm_linux_thumb_le_breakpoint);
tdep->thumb2_breakpoint_size = sizeof (arm_linux_thumb2_le_breakpoint);
if (tdep->fp_model == ARM_FLOAT_AUTO)
tdep->fp_model = ARM_FLOAT_FPA;