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* config/mn10300/tm-mn10300.h (FP_REGNUM): Redefine to be a

Browse Source 
pseudo-register, not the same as a3.
	(D2_REGNUM, D3_REGNUM, A2_REGNUM, A3_REGNUM): Define.
	* mn10300-tdep.c (fix_frame_pointer): New function.
	(set_movm_offsets): Use register number macros instead of
	hard-coded constants.
	(mn10300_analyze_prologue): Fix to handle redefinition of FP_REGNUM.
	(mn10300_frame_chain):  Fix to handle redefinition of FP_REGNUM;
	use register number macros instead of hard-coded constants;
	add missing parameter to call of mn10300_analyze_prologue.
	(mn10300_frame_saved_pc): Use register number macros instead of
	hard-coded constants.
This commit is contained in:
Mark Alexander 1998-09-03 22:59:13 +00:00
parent 3fe41381a6
commit 11ac795258
3 changed files with 137 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
gdb/ChangeLog
View File

@ -1,3 +1,18 @@
Thu Sep 3 13:50:20 1998 Mark Alexander <marka@cygnus.com>
* config/mn10300/tm-mn10300.h (FP_REGNUM): Redefine to be a
pseudo-register, not the same as a3.
(D2_REGNUM, D3_REGNUM, A2_REGNUM, A3_REGNUM): Define.
* mn10300-tdep.c (fix_frame_pointer): New function.
(set_movm_offsets): Use register number macros instead of
hard-coded constants.
(mn10300_analyze_prologue): Fix to handle redefinition of FP_REGNUM.
(mn10300_frame_chain): Fix to handle redefinition of FP_REGNUM;
use register number macros instead of hard-coded constants;
add missing parameter to call of mn10300_analyze_prologue.
(mn10300_frame_saved_pc): Use register number macros instead of
hard-coded constants.
Tue Sep 1 12:04:57 EDT 1998 Zdenek Radouch (radouch@cygnus.com)
Changes to support/fix ARM/ELF port. Use MAKE_MSYMBOL_SPECIAL for

9
gdb/config/mn10300/tm-mn10300.h
View File

@ -41,8 +41,12 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
{ "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3", \
"sp", "pc", "mdr", "psw", "lir", "lar", "", "", \
"", "", "", "", "", "", "", "", \
"", "", "", "", "", "", "", "" }
"", "", "", "", "", "", "", "fp" }
#define D2_REGNUM 2
#define D3_REGNUM 3
#define A2_REGNUM 6
#define A3_REGNUM 7
#define SP_REGNUM 8
#define PC_REGNUM 9
#define MDR_REGNUM 10
@ -53,7 +57,8 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define E0_REGNUM 14
/* end-sanitize-am33 */
#define FP_REGNUM 7
/* Pseudo register that contains true address of executing stack frame */
#define FP_REGNUM 31
/* The breakpoint instruction must be the same size as the smallest
instruction in the instruction set.

172
gdb/mn10300-tdep.c
View File

@ -36,28 +36,78 @@ char *am33_register_names [] =
"sp", "pc", "mdr", "psw", "lir", "lar", "",
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", ""};
int am33_mode;
/* end-sanitize-am33 */
static CORE_ADDR mn10300_analyze_prologue PARAMS ((struct frame_info *fi,
CORE_ADDR pc));
/* Values for frame_info.status */
#define MY_FRAME_IN_SP 0x1
#define MY_FRAME_IN_FP 0x2
#define NO_MORE_FRAMES 0x4
/* Fix fi->frame if it's bogus at this point. This is a helper
function for mn10300_analyze_prologue. */
static void
fix_frame_pointer (fi, stack_size)
struct frame_info *fi;
int stack_size;
{
if (fi && fi->next == NULL)
{
if (fi->status & MY_FRAME_IN_SP)
fi->frame = read_sp () - stack_size;
else if (fi->status & MY_FRAME_IN_FP)
fi->frame = read_register (A3_REGNUM);
}
}
/* Set offsets of registers saved by movm instruction.
This is a helper function for mn10300_analyze_prologue. */
static void
set_movm_offsets (fi, found_movm)
set_movm_offsets (fi, movm_args)
struct frame_info *fi;
int found_movm;
int movm_args;
{
if (fi == NULL || found_movm == 0)
int offset = 0;
if (fi == NULL || movm_args == 0)
return;
fi->fsr.regs[7] = fi->frame;
fi->fsr.regs[6] = fi->frame + 4;
fi->fsr.regs[3] = fi->frame + 8;
fi->fsr.regs[2] = fi->frame + 12;
if (movm_args & 0x10)
{
fi->fsr.regs[A3_REGNUM] = fi->frame + offset;
offset += 4;
}
if (movm_args & 0x20)
{
fi->fsr.regs[A2_REGNUM] = fi->frame + offset;
offset += 4;
}
if (movm_args & 0x40)
{
fi->fsr.regs[D3_REGNUM] = fi->frame + offset;
offset += 4;
}
if (movm_args & 0x80)
{
fi->fsr.regs[D2_REGNUM] = fi->frame + offset;
offset += 4;
}
/* start-sanitize-am33 */
fi->fsr.regs[E0_REGNUM+5] = fi->frame + 16;
fi->fsr.regs[E0_REGNUM+4] = fi->frame + 20;
fi->fsr.regs[E0_REGNUM+3] = fi->frame + 24;
fi->fsr.regs[E0_REGNUM+2] = fi->frame + 28;
if (am33_mode && movm_args & 0x02)
{
fi->fsr.regs[E0_REGNUM+5] = fi->frame + offset;
fi->fsr.regs[E0_REGNUM+4] = fi->frame + offset + 4;
fi->fsr.regs[E0_REGNUM+3] = fi->frame + offset + 8;
fi->fsr.regs[E0_REGNUM+2] = fi->frame + offset + 12;
}
/* end-sanitize-am33 */
}
@ -110,10 +160,6 @@ set_movm_offsets (fi, found_movm)
if the first instruction looks like mov <imm>,sp. This tells
frame chain to not bother trying to unwind past this frame. */
#define MY_FRAME_IN_SP 0x1
#define MY_FRAME_IN_FP 0x2
#define NO_MORE_FRAMES 0x4
static CORE_ADDR
mn10300_analyze_prologue (fi, pc)
struct frame_info *fi;
@ -123,7 +169,7 @@ mn10300_analyze_prologue (fi, pc)
CORE_ADDR stack_size;
int imm_size;
unsigned char buf[4];
int status, found_movm = 0;
int status, movm_args = 0;
char *name;
/* Use the PC in the frame if it's provided to look up the
@ -189,8 +235,7 @@ mn10300_analyze_prologue (fi, pc)
status = read_memory_nobpt (addr, buf, 2);
if (status != 0)
{
if (fi && fi->next == NULL && fi->status & MY_FRAME_IN_SP)
fi->frame = read_sp ();
fix_frame_pointer (fi, 0);
return addr;
}
@ -210,7 +255,10 @@ mn10300_analyze_prologue (fi, pc)
in fsr.regs as needed. */
if (buf[0] == 0xcf)
{
found_movm = 1;
/* Extract the register list for the movm instruction. */
status = read_memory_nobpt (addr + 1, buf, 1);
movm_args = *buf;
addr += 2;
/* Quit now if we're beyond the stop point. */
@ -221,7 +269,7 @@ mn10300_analyze_prologue (fi, pc)
fi->frame = read_sp ();
/* Note if/where callee saved registers were saved. */
set_movm_offsets (fi, found_movm);
set_movm_offsets (fi, movm_args);
return addr;
}
@ -234,7 +282,7 @@ mn10300_analyze_prologue (fi, pc)
fi->frame = read_sp ();
/* Note if/where callee saved registers were saved. */
set_movm_offsets (fi, found_movm);
set_movm_offsets (fi, movm_args);
return addr;
}
}
@ -254,8 +302,11 @@ mn10300_analyze_prologue (fi, pc)
/* Quit now if we're beyond the stop point. */
if (addr >= stop)
{
/* Fix fi->frame if it's bogus at this point. */
fix_frame_pointer (fi, 0);
/* Note if/where callee saved registers were saved. */
set_movm_offsets (fi, found_movm);
set_movm_offsets (fi, movm_args);
return addr;
}
@ -263,8 +314,11 @@ mn10300_analyze_prologue (fi, pc)
status = read_memory_nobpt (addr, buf, 2);
if (status != 0)
{
/* Fix fi->frame if it's bogus at this point. */
fix_frame_pointer (fi, 0);
/* Note if/where callee saved registers were saved. */
set_movm_offsets (fi, found_movm);
set_movm_offsets (fi, movm_args);
return addr;
}
}
@ -283,11 +337,10 @@ mn10300_analyze_prologue (fi, pc)
if (status != 0)
{
/* Fix fi->frame if it's bogus at this point. */
if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP))
fi->frame = read_sp ();
fix_frame_pointer (fi, 0);
/* Note if/where callee saved registers were saved. */
set_movm_offsets (fi, found_movm);
set_movm_offsets (fi, movm_args);
return addr;
}
@ -307,11 +360,10 @@ mn10300_analyze_prologue (fi, pc)
if (status != 0)
{
/* Fix fi->frame if it's bogus at this point. */
if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP))
fi->frame = read_sp ();
fix_frame_pointer (fi, 0);
/* Note if/where callee saved registers were saved. */
set_movm_offsets (fi, found_movm);
set_movm_offsets (fi, movm_args);
return addr;
}
@ -325,22 +377,20 @@ mn10300_analyze_prologue (fi, pc)
/* No more prologue insns follow, so begin preparation to return. */
/* Fix fi->frame if it's bogus at this point. */
if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP))
fi->frame = read_sp () - stack_size;
fix_frame_pointer (fi, stack_size);
/* Note if/where callee saved registers were saved. */
set_movm_offsets (fi, found_movm);
set_movm_offsets (fi, movm_args);
return addr;
}
/* We never found an insn which allocates local stack space, regardless
this is the end of the prologue. */
/* Fix fi->frame if it's bogus at this point. */
if (fi && fi->next == NULL && (fi->status & MY_FRAME_IN_SP))
fi->frame = read_sp ();
fix_frame_pointer (fi, 0);
/* Note if/where callee saved registers were saved. */
set_movm_offsets (fi, found_movm);
set_movm_offsets (fi, movm_args);
return addr;
}
@ -372,8 +422,8 @@ mn10300_frame_chain (fi)
If our caller has a frame pointer, then we need to
find the entry value of $a3 to our function.
If fsr.regs[7] is nonzero, then it's at the memory
location pointed to by fsr.regs[7].
If fsr.regs[A3_REGNUM] is nonzero, then it's at the memory
location pointed to by fsr.regs[A3_REGNUM].
Else it's still in $a3.
@ -389,30 +439,33 @@ mn10300_frame_chain (fi)
memset (dummy_frame.fsr.regs, '\000', sizeof dummy_frame.fsr.regs);
dummy_frame.status = 0;
dummy_frame.stack_size = 0;
mn10300_analyze_prologue (&dummy_frame);
mn10300_analyze_prologue (&dummy_frame, 0);
if (dummy_frame.status & MY_FRAME_IN_FP)
{
/* Our caller has a frame pointer. So find the frame in $a3 or
in the stack. */
if (fi->fsr.regs[7])
return (read_memory_integer (fi->fsr.regs[FP_REGNUM], REGISTER_SIZE));
if (fi->fsr.regs[A3_REGNUM])
return (read_memory_integer (fi->fsr.regs[A3_REGNUM], REGISTER_SIZE));
else
return read_register (FP_REGNUM);
return read_register (A3_REGNUM);
}
else
{
int adjust = 0;
adjust += (fi->fsr.regs[2] ? 4 : 0);
adjust += (fi->fsr.regs[3] ? 4 : 0);
adjust += (fi->fsr.regs[6] ? 4 : 0);
adjust += (fi->fsr.regs[7] ? 4 : 0);
adjust += (fi->fsr.regs[D2_REGNUM] ? 4 : 0);
adjust += (fi->fsr.regs[D3_REGNUM] ? 4 : 0);
adjust += (fi->fsr.regs[A2_REGNUM] ? 4 : 0);
adjust += (fi->fsr.regs[A3_REGNUM] ? 4 : 0);
/* start-sanitize-am33 */
adjust += (fi->fsr.regs[E0_REGNUM+5] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+4] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+3] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+2] ? 4 : 0);
if (am33_mode)
{
adjust += (fi->fsr.regs[E0_REGNUM+5] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+4] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+3] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+2] ? 4 : 0);
}
/* end-sanitize-am33 */
/* Our caller does not have a frame pointer. So his frame starts
@ -600,15 +653,18 @@ mn10300_frame_saved_pc (fi)
{
int adjust = 0;
adjust += (fi->fsr.regs[2] ? 4 : 0);
adjust += (fi->fsr.regs[3] ? 4 : 0);
adjust += (fi->fsr.regs[6] ? 4 : 0);
adjust += (fi->fsr.regs[7] ? 4 : 0);
adjust += (fi->fsr.regs[D2_REGNUM] ? 4 : 0);
adjust += (fi->fsr.regs[D3_REGNUM] ? 4 : 0);
adjust += (fi->fsr.regs[A2_REGNUM] ? 4 : 0);
adjust += (fi->fsr.regs[A3_REGNUM] ? 4 : 0);
/* start-sanitize-am33 */
adjust += (fi->fsr.regs[E0_REGNUM+5] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+4] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+3] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+2] ? 4 : 0);
if (am33_mode)
{
adjust += (fi->fsr.regs[E0_REGNUM+5] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+4] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+3] ? 4 : 0);
adjust += (fi->fsr.regs[E0_REGNUM+2] ? 4 : 0);
}
/* end-sanitize-am33 */
return (read_memory_integer (fi->frame + adjust, REGISTER_SIZE));
@ -670,10 +726,12 @@ set_machine_hook (filename)
}
/* start-sanitize-am33 */
am33_mode = 0;
if (bfd_get_mach (exec_bfd) == bfd_mach_am33)
{
for (i = 0; i < NUM_REGS; i++)
reg_names[i] = am33_register_names[i];
am33_mode = 1;
}
/* end-sanitize-am33 */
}