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* h8300-tdep.c (IS_PUSH): Refine.

Browse source 
(IS_MOVE_FP, IS_MOV_SP_FP): Accept H8/300H varaints.
        (IS_SUB4_SP, IS_SUBL_SP): New macros.
        (h8300_skip_prologue): Handle H8/300H prologue code sequences.
        (examine_prologue): Handle addresses from 0x010000 to 0xffffff
        when in H8/300H mode.  Get the return pointer's address correctly
        for the H8/300H.  Handle H8/300H prolouge code sequences.
Avoiding major breakage on the H8/300H, and on the eval board.  Jeez, did
anyone even try to debug H8/300H code with gdb in the past?!?
This commit is contained in:
Jeff Law 1996-05-23 21:35:09 +00:00
parent 52f74d48c9
commit 31778db0db
2 changed files with 49 additions and 12 deletions
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8
gdb/ChangeLog
View file

@ -1,5 +1,13 @@
Thu May 23 15:13:56 1996 Jeffrey A Law (law@cygnus.com)
* h8300-tdep.c (IS_PUSH): Refine.
(IS_MOVE_FP, IS_MOV_SP_FP): Accept H8/300H varaints.
(IS_SUB4_SP, IS_SUBL_SP): New macros.
(h8300_skip_prologue): Handle H8/300H prologue code sequences.
(examine_prologue): Handle addresses from 0x010000 to 0xffffff
when in H8/300H mode. Get the return pointer's address correctly
for the H8/300H. Handle H8/300H prolouge code sequences.
* symfile.c (generic_load): Print the starting address
of the file just loaded.

53
gdb/h8300-tdep.c
View file

@ -48,11 +48,13 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
*/
#define IS_PUSH(x) ((x & 0xff00)==0x6d00)
#define IS_PUSH(x) ((x & 0xfff0)==0x6df0)
#define IS_PUSH_FP(x) (x == 0x6df6)
#define IS_MOVE_FP(x) (x == 0x0d76)
#define IS_MOV_SP_FP(x) (x == 0x0d76)
#define IS_MOVE_FP(x) (x == 0x0d76 || x == 0x0ff6)
#define IS_MOV_SP_FP(x) (x == 0x0d76 || x == 0x0ff6)
#define IS_SUB2_SP(x) (x==0x1b87)
#define IS_SUB4_SP(x) (x==0x1b97)
#define IS_SUBL_SP(x) (x==0x7a37)
#define IS_MOVK_R5(x) (x==0x7905)
#define IS_SUB_R5SP(x) (x==0x1957)
@ -67,12 +69,19 @@ h8300_skip_prologue (start_pc)
CORE_ADDR start_pc;
{
short int w;
int adjust = 0;
w = read_memory_unsigned_integer (start_pc, 2);
if (w == 0x0100)
{
w = read_memory_unsigned_integer (start_pc + 2, 2);
adjust = 2;
}
/* Skip past all push insns */
while (IS_PUSH_FP (w))
{
start_pc += 2;
start_pc += 2 + adjust;
w = read_memory_unsigned_integer (start_pc, 2);
}
@ -95,12 +104,15 @@ h8300_skip_prologue (start_pc)
start_pc += 2;
w = read_memory_unsigned_integer (start_pc, 2);
}
while (IS_SUB2_SP (w))
while (IS_SUB2_SP (w) || IS_SUB4_SP (w))
{
start_pc += 2;
w = read_memory_unsigned_integer (start_pc, 2);
}
if (IS_SUBL_SP (w))
start_pc += 6;
return start_pc;
}
@ -226,6 +238,8 @@ examine_prologue (ip, limit, after_prolog_fp, fsr, fi)
char in_frame[11]; /* One for each reg */
int adjust = 0;
memset (in_frame, 1, 11);
for (r = 0; r < 8; r++)
{
@ -235,20 +249,26 @@ examine_prologue (ip, limit, after_prolog_fp, fsr, fi)
{
after_prolog_fp = read_register (SP_REGNUM);
}
if (ip == 0 || ip & (h8300hmode ? ~0xffff : ~0xffff))
if (ip == 0 || ip & (h8300hmode ? ~0xffffff : ~0xffff))
return 0;
next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
if (insn_word == 0x0100)
{
insn_word = read_memory_unsigned_integer (ip + 2, 2);
adjust = 2;
}
/* Skip over any fp push instructions */
fsr->regs[6] = after_prolog_fp;
while (next_ip && IS_PUSH_FP (insn_word))
{
ip = next_ip;
ip = next_ip + adjust;
in_frame[insn_word & 0x7] = reg_save_depth;
next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
reg_save_depth += 2;
reg_save_depth += 2 + adjust;
}
/* Is this a move into the fp */
@ -262,11 +282,11 @@ examine_prologue (ip, limit, after_prolog_fp, fsr, fi)
/* Skip over any stack adjustment, happens either with a number of
sub#2,sp or a mov #x,r5 sub r5,sp */
if (next_ip && IS_SUB2_SP (insn_word))
if (next_ip && (IS_SUB2_SP (insn_word) || IS_SUB4_SP (insn_word)))
{
while (next_ip && IS_SUB2_SP (insn_word))
while (next_ip && (IS_SUB2_SP (insn_word) || IS_SUB4_SP (insn_word)))
{
auto_depth += 2;
auto_depth += IS_SUB2_SP (insn_word) ? 2 : 4;
ip = next_ip;
next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
}
@ -282,7 +302,16 @@ examine_prologue (ip, limit, after_prolog_fp, fsr, fi)
next_ip = NEXT_PROLOGUE_INSN (next_ip, limit, &insn_word);
auto_depth += insn_word;
}
if (next_ip && IS_SUBL_SP (insn_word))
{
ip = next_ip;
auto_depth += read_memory_unsigned_integer (ip, 4);
ip += 4;
next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn_word);
}
}
/* Work out which regs are stored where */
while (next_ip && IS_PUSH (insn_word))
{
@ -297,7 +326,7 @@ examine_prologue (ip, limit, after_prolog_fp, fsr, fi)
/* Locals are always reffed based from the fp */
fi->locals_pointer = after_prolog_fp;
/* The PC is at a known place */
fi->from_pc = read_memory_unsigned_integer (after_prolog_fp + 2, BINWORD);
fi->from_pc = read_memory_unsigned_integer (after_prolog_fp + BINWORD, BINWORD);
/* Rememeber any others too */
in_frame[PC_REGNUM] = 0;