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Add large frame support

This commit is contained in:
Michael Meissner 1996-12-27 20:59:46 +00:00
parent a490f8c130
commit 0b019fa141
3 changed files with 15 additions and 5 deletions
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6
gdb/ChangeLog
View File

@ -3,10 +3,10 @@ Fri Dec 27 14:53:40 1996 Michael Meissner <meissner@tiktok.cygnus.com>
* v850-tdep.c (struct pifsr): Add cur_frameoffset field.
(v850_scan_prologue): Add debug code #ifdef'ed DEBUG. Support new
compiler prologues using register save functions and short store
instructions.
instructions. Add support for functions with large stack frames.
* config/v850/tm-vm850.h ({R1,EP}_REGNUMS): New register number
defintiions for r1, ep.
* config/v850/tm-vm850.h ({R0,R1,R12,EP}_REGNUMS): New register
number defintiions for r0, r1, r12, ep.
(SAVE{1,2,3}_{START,END}_REGNUM): Register number definitions for
the 3 sets of saved registers.

2
gdb/config/v850/tm-v850.h
View File

@ -39,6 +39,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define REGISTER_SIZE 4
#define MAX_REGISTER_RAW_SIZE 4
#define R0_REGNUM 0
#define R1_REGNUM 1
#define SAVE1_START_REGNUM 2
#define SAVE1_END_REGNUM 2
@ -47,6 +48,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define ARGLAST_REGNUM 9
#define V0_REGNUM 10
#define V1_REGNUM 11
#define R12_REGNUM 12
#define SAVE2_START_REGNUM 20
#define SAVE2_END_REGNUM 29
#define FP_REGNUM 29

12
gdb/v850-tdep.c
View File

@ -71,6 +71,7 @@ v850_scan_prologue (pc, pi)
CORE_ADDR save_pc, save_end;
int regsave_func_p;
int current_sp_size;
int r12_tmp;
/* First, figure out the bounds of the prologue so that we can limit the
search to something reasonable. */
@ -115,6 +116,7 @@ v850_scan_prologue (pc, pi)
regsave_func_p = 0;
save_pc = 0;
save_end = 0;
r12_tmp = 0;
#ifdef DEBUG
printf_filtered ("Current_pc = 0x%.8lx, prologue_end = 0x%.8lx\n",
@ -184,13 +186,19 @@ v850_scan_prologue (pc, pi)
pi->framereg = FP_REGNUM;
}
else if (insn == ((R12_REGNUM << 11) | 0x0640 | R0_REGNUM)) /* movhi hi(const),r0,r12 */
r12_tmp = read_memory_integer (current_pc + 2, 2) << 16;
else if (insn == ((R12_REGNUM << 11) | 0x0620 | R12_REGNUM)) /* movea lo(const),r12,r12 */
r12_tmp += read_memory_integer (current_pc + 2, 2);
else if (insn == ((SP_REGNUM << 11) | 0x01c0 | R12_REGNUM) && r12_tmp) /* add r12,sp */
pi->frameoffset = r12_tmp;
else if (insn == ((EP_REGNUM << 11) | 0x0000 | SP_REGNUM)) /* mov sp,ep */
ep_used = 1;
else if (insn == ((EP_REGNUM << 11) | 0x0000 | R1_REGNUM)) /* mov r1,ep */
ep_used = 0;
else if (((insn & 0x07ff) == (0x0760 | SP_REGNUM) /* st.w <reg>,<offset>[sp] */
else if (((insn & 0x07ff) == (0x0760 | SP_REGNUM) /* st.w <reg>,<offset>[sp] */
|| (fp_used
&& (insn & 0x07ff) == (0x0760 | FP_REGNUM))) /* st.w <reg>,<offset>[fp] */
&& (insn & 0x07ff) == (0x0760 | FP_REGNUM))) /* st.w <reg>,<offset>[fp] */
&& pifsr
&& (((reg = (insn >> 11) & 0x1f) >= SAVE1_START_REGNUM && reg <= SAVE1_END_REGNUM)
|| (reg >= SAVE2_START_REGNUM && reg <= SAVE2_END_REGNUM)