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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/v850-tdep.c
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
Diffstat (limited to 'gdb/v850-tdep.c')
-rw-r--r--gdb/v850-tdep.c884
1 files changed, 0 insertions, 884 deletions
diff --git a/gdb/v850-tdep.c b/gdb/v850-tdep.c
deleted file mode 100644
index b98a4bd..0000000
--- a/gdb/v850-tdep.c
+++ /dev/null
@@ -1,884 +0,0 @@
-/* Target-dependent code for the NEC V850 for GDB, the GNU debugger.
- Copyright 1996, Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "frame.h"
-#include "inferior.h"
-#include "obstack.h"
-#include "target.h"
-#include "value.h"
-#include "bfd.h"
-#include "gdb_string.h"
-#include "gdbcore.h"
-#include "symfile.h"
-
-
-static char *v850_generic_reg_names[] = REGISTER_NAMES;
-
-static char *v850e_reg_names[] =
-{
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
- "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
- "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
- "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
- "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
- "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
- "ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23",
- "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31",
- "pc", "fp"
-};
-
-char **v850_register_names = v850_generic_reg_names;
-
-struct
-{
- char **regnames;
- int mach;
-} v850_processor_type_table[] =
-{
- { v850_generic_reg_names, bfd_mach_v850 },
- { v850e_reg_names, bfd_mach_v850e },
- { v850e_reg_names, bfd_mach_v850ea },
- { NULL, 0 }
-};
-
-/* Info gleaned from scanning a function's prologue. */
-
-struct pifsr /* Info about one saved reg */
-{
- int framereg; /* Frame reg (SP or FP) */
- int offset; /* Offset from framereg */
- int cur_frameoffset; /* Current frameoffset */
- int reg; /* Saved register number */
-};
-
-struct prologue_info
-{
- int framereg;
- int frameoffset;
- int start_function;
- struct pifsr *pifsrs;
-};
-
-static CORE_ADDR v850_scan_prologue PARAMS ((CORE_ADDR pc,
- struct prologue_info *fs));
-
-
-/* Should call_function allocate stack space for a struct return? */
-int
-v850_use_struct_convention (gcc_p, type)
- int gcc_p;
- struct type *type;
-{
- return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 4);
-}
-
-
-
-/* Structure for mapping bits in register lists to register numbers. */
-struct reg_list
-{
- long mask;
- int regno;
-};
-
-/* Helper function for v850_scan_prologue to handle prepare instruction. */
-
-static void
-handle_prepare (int insn, int insn2, CORE_ADDR *current_pc_ptr,
- struct prologue_info *pi, struct pifsr **pifsr_ptr)
-
-{
- CORE_ADDR current_pc = *current_pc_ptr;
- struct pifsr *pifsr = *pifsr_ptr;
- long next = insn2 & 0xffff;
- long list12 = ((insn & 1) << 16) + (next & 0xffe0);
- long offset = (insn & 0x3e) << 1;
- static struct reg_list reg_table [] =
- {
- { 0x00800, 20 }, /* r20 */
- { 0x00400, 21 }, /* r21 */
- { 0x00200, 22 }, /* r22 */
- { 0x00100, 23 }, /* r23 */
- { 0x08000, 24 }, /* r24 */
- { 0x04000, 25 }, /* r25 */
- { 0x02000, 26 }, /* r26 */
- { 0x01000, 27 }, /* r27 */
- { 0x00080, 28 }, /* r28 */
- { 0x00040, 29 }, /* r29 */
- { 0x10000, 30 }, /* ep */
- { 0x00020, 31 }, /* lp */
- { 0, 0 } /* end of table */
- };
- int i;
-
- if ((next & 0x1f) == 0x0b) /* skip imm16 argument */
- current_pc += 2;
- else if ((next & 0x1f) == 0x13) /* skip imm16 argument */
- current_pc += 2;
- else if ((next & 0x1f) == 0x1b) /* skip imm32 argument */
- current_pc += 4;
-
- /* Calculate the total size of the saved registers, and add it
- it to the immediate value used to adjust SP. */
- for (i = 0; reg_table[i].mask != 0; i++)
- if (list12 & reg_table[i].mask)
- offset += REGISTER_RAW_SIZE (regtable[i].regno);
- pi->frameoffset -= offset;
-
- /* Calculate the offsets of the registers relative to the value
- the SP will have after the registers have been pushed and the
- imm5 value has been subtracted from it. */
- if (pifsr)
- {
- for (i = 0; reg_table[i].mask != 0; i++)
- {
- if (list12 & reg_table[i].mask)
- {
- int reg = reg_table[i].regno;
- offset -= REGISTER_RAW_SIZE (reg);
- pifsr->reg = reg;
- pifsr->offset = offset;
- pifsr->cur_frameoffset = pi->frameoffset;
- #ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
- #endif
- pifsr++;
- }
- }
- }
-#ifdef DEBUG
- printf_filtered ("\tfound ctret after regsave func");
-#endif
-
- /* Set result parameters. */
- *current_pc_ptr = current_pc;
- *pifsr_ptr = pifsr;
-}
-
-
-/* Helper function for v850_scan_prologue to handle pushm/pushl instructions.
- FIXME: the SR bit of the register list is not supported; must check
- that the compiler does not ever generate this bit. */
-
-static void
-handle_pushm (int insn, int insn2, struct prologue_info *pi,
- struct pifsr **pifsr_ptr)
-
-{
- struct pifsr *pifsr = *pifsr_ptr;
- long list12 = ((insn & 0x0f) << 16) + (insn2 & 0xfff0);
- long offset = 0;
- static struct reg_list pushml_reg_table [] =
- {
- { 0x80000, PS_REGNUM }, /* PSW */
- { 0x40000, 1 }, /* r1 */
- { 0x20000, 2 }, /* r2 */
- { 0x10000, 3 }, /* r3 */
- { 0x00800, 4 }, /* r4 */
- { 0x00400, 5 }, /* r5 */
- { 0x00200, 6 }, /* r6 */
- { 0x00100, 7 }, /* r7 */
- { 0x08000, 8 }, /* r8 */
- { 0x04000, 9 }, /* r9 */
- { 0x02000, 10 }, /* r10 */
- { 0x01000, 11 }, /* r11 */
- { 0x00080, 12 }, /* r12 */
- { 0x00040, 13 }, /* r13 */
- { 0x00020, 14 }, /* r14 */
- { 0x00010, 15 }, /* r15 */
- { 0, 0 } /* end of table */
- };
- static struct reg_list pushmh_reg_table [] =
- {
- { 0x80000, 16 }, /* r16 */
- { 0x40000, 17 }, /* r17 */
- { 0x20000, 18 }, /* r18 */
- { 0x10000, 19 }, /* r19 */
- { 0x00800, 20 }, /* r20 */
- { 0x00400, 21 }, /* r21 */
- { 0x00200, 22 }, /* r22 */
- { 0x00100, 23 }, /* r23 */
- { 0x08000, 24 }, /* r24 */
- { 0x04000, 25 }, /* r25 */
- { 0x02000, 26 }, /* r26 */
- { 0x01000, 27 }, /* r27 */
- { 0x00080, 28 }, /* r28 */
- { 0x00040, 29 }, /* r29 */
- { 0x00010, 30 }, /* r30 */
- { 0x00020, 31 }, /* r31 */
- { 0, 0 } /* end of table */
- };
- struct reg_list *reg_table;
- int i;
-
- /* Is this a pushml or a pushmh? */
- if ((insn2 & 7) == 1)
- reg_table = pushml_reg_table;
- else
- reg_table = pushmh_reg_table;
-
- /* Calculate the total size of the saved registers, and add it
- it to the immediate value used to adjust SP. */
- for (i = 0; reg_table[i].mask != 0; i++)
- if (list12 & reg_table[i].mask)
- offset += REGISTER_RAW_SIZE (regtable[i].regno);
- pi->frameoffset -= offset;
-
- /* Calculate the offsets of the registers relative to the value
- the SP will have after the registers have been pushed and the
- imm5 value is subtracted from it. */
- if (pifsr)
- {
- for (i = 0; reg_table[i].mask != 0; i++)
- {
- if (list12 & reg_table[i].mask)
- {
- int reg = reg_table[i].regno;
- offset -= REGISTER_RAW_SIZE (reg);
- pifsr->reg = reg;
- pifsr->offset = offset;
- pifsr->cur_frameoffset = pi->frameoffset;
- #ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
- #endif
- pifsr++;
- }
- }
- }
-#ifdef DEBUG
- printf_filtered ("\tfound ctret after regsave func");
-#endif
-
- /* Set result parameters. */
- *pifsr_ptr = pifsr;
-}
-
-
-
-
-/* Function: scan_prologue
- Scan the prologue of the function that contains PC, and record what
- we find in PI. PI->fsr must be zeroed by the called. Returns the
- pc after the prologue. Note that the addresses saved in pi->fsr
- are actually just frame relative (negative offsets from the frame
- pointer). This is because we don't know the actual value of the
- frame pointer yet. In some circumstances, the frame pointer can't
- be determined till after we have scanned the prologue. */
-
-static CORE_ADDR
-v850_scan_prologue (pc, pi)
- CORE_ADDR pc;
- struct prologue_info *pi;
-{
- CORE_ADDR func_addr, prologue_end, current_pc;
- struct pifsr *pifsr, *pifsr_tmp;
- int fp_used;
- int ep_used;
- int reg;
- CORE_ADDR save_pc, save_end;
- int regsave_func_p;
- int r12_tmp;
-
- /* First, figure out the bounds of the prologue so that we can limit the
- search to something reasonable. */
-
- if (find_pc_partial_function (pc, NULL, &func_addr, NULL))
- {
- struct symtab_and_line sal;
-
- sal = find_pc_line (func_addr, 0);
-
- if (func_addr == entry_point_address ())
- pi->start_function = 1;
- else
- pi->start_function = 0;
-
-#if 0
- if (sal.line == 0)
- prologue_end = pc;
- else
- prologue_end = sal.end;
-#else
- prologue_end = pc;
-#endif
- }
- else
- { /* We're in the boondocks */
- func_addr = pc - 100;
- prologue_end = pc;
- }
-
- prologue_end = min (prologue_end, pc);
-
- /* Now, search the prologue looking for instructions that setup fp, save
- rp, adjust sp and such. We also record the frame offset of any saved
- registers. */
-
- pi->frameoffset = 0;
- pi->framereg = SP_REGNUM;
- fp_used = 0;
- ep_used = 0;
- pifsr = pi->pifsrs;
- 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",
- (long)func_addr, (long)prologue_end);
-#endif
-
- for (current_pc = func_addr; current_pc < prologue_end; )
- {
- int insn, insn2;
-
-#ifdef DEBUG
- printf_filtered ("0x%.8lx ", (long)current_pc);
- (*tm_print_insn) (current_pc, &tm_print_insn_info);
-#endif
-
- insn = read_memory_unsigned_integer (current_pc, 2);
- current_pc += 2;
- if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */
- {
- insn2 = read_memory_unsigned_integer (current_pc, 2);
- current_pc += 2;
- }
-
- if ((insn & 0xffc0) == ((10 << 11) | 0x0780) && !regsave_func_p)
- { /* jarl <func>,10 */
- long low_disp = insn2 & ~ (long) 1;
- long disp = (((((insn & 0x3f) << 16) + low_disp)
- & ~ (long) 1) ^ 0x00200000) - 0x00200000;
-
- save_pc = current_pc;
- save_end = prologue_end;
- regsave_func_p = 1;
- current_pc += disp - 4;
- prologue_end = (current_pc
- + (2 * 3) /* moves to/from ep */
- + 4 /* addi <const>,sp,sp */
- + 2 /* jmp [r10] */
- + (2 * 12) /* sst.w to save r2, r20-r29, r31 */
- + 20); /* slop area */
-
-#ifdef DEBUG
- printf_filtered ("\tfound jarl <func>,r10, disp = %ld, low_disp = %ld, new pc = 0x%.8lx\n",
- disp, low_disp, (long)current_pc + 2);
-#endif
- continue;
- }
- else if ((insn & 0xffc0) == 0x0200 && !regsave_func_p)
- { /* callt <imm6> */
- long ctbp = read_register (CTBP_REGNUM);
- long adr = ctbp + ((insn & 0x3f) << 1);
-
- save_pc = current_pc;
- save_end = prologue_end;
- regsave_func_p = 1;
- current_pc = ctbp + (read_memory_unsigned_integer (adr, 2) & 0xffff);
- prologue_end = (current_pc
- + (2 * 3) /* prepare list2,imm5,sp/imm */
- + 4 /* ctret */
- + 20); /* slop area */
-
-#ifdef DEBUG
- printf_filtered ("\tfound callt, ctbp = 0x%.8lx, adr = %.8lx, new pc = 0x%.8lx\n",
- ctbp, adr, (long)current_pc);
-#endif
- continue;
- }
- else if ((insn & 0xffc0) == 0x0780) /* prepare list2,imm5 */
- {
- handle_prepare (insn, insn2, &current_pc, pi, &pifsr);
- continue;
- }
- else if (insn == 0x07e0 && regsave_func_p && insn2 == 0x0144)
- { /* ctret after processing register save function */
- current_pc = save_pc;
- prologue_end = save_end;
- regsave_func_p = 0;
-#ifdef DEBUG
- printf_filtered ("\tfound ctret after regsave func");
-#endif
- continue;
- }
- else if ((insn & 0xfff0) == 0x07e0 && (insn2 & 5) == 1)
- { /* pushml, pushmh */
- handle_pushm (insn, insn2, pi, &pifsr);
- continue;
- }
- else if ((insn & 0xffe0) == 0x0060 && regsave_func_p)
- { /* jmp after processing register save function */
- current_pc = save_pc;
- prologue_end = save_end;
- regsave_func_p = 0;
-#ifdef DEBUG
- printf_filtered ("\tfound jmp after regsave func");
-#endif
- continue;
- }
- else if ((insn & 0x07c0) == 0x0780 /* jarl or jr */
- || (insn & 0xffe0) == 0x0060 /* jmp */
- || (insn & 0x0780) == 0x0580) /* branch */
- {
-#ifdef DEBUG
- printf_filtered ("\n");
-#endif
- break; /* Ran into end of prologue */
- }
-
- else if ((insn & 0xffe0) == ((SP_REGNUM << 11) | 0x0240)) /* add <imm>,sp */
- pi->frameoffset += ((insn & 0x1f) ^ 0x10) - 0x10;
- else if (insn == ((SP_REGNUM << 11) | 0x0600 | SP_REGNUM)) /* addi <imm>,sp,sp */
- pi->frameoffset += insn2;
- else if (insn == ((FP_RAW_REGNUM << 11) | 0x0000 | SP_REGNUM)) /* mov sp,fp */
- {
- fp_used = 1;
- pi->framereg = FP_RAW_REGNUM;
- }
-
- else if (insn == ((R12_REGNUM << 11) | 0x0640 | R0_REGNUM)) /* movhi hi(const),r0,r12 */
- r12_tmp = insn2 << 16;
- else if (insn == ((R12_REGNUM << 11) | 0x0620 | R12_REGNUM)) /* movea lo(const),r12,r12 */
- r12_tmp += insn2;
- 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] */
- || (fp_used
- && (insn & 0x07ff) == (0x0760 | FP_RAW_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)
- || (reg >= SAVE3_START_REGNUM && reg <= SAVE3_END_REGNUM)))
- {
- pifsr->reg = reg;
- pifsr->offset = insn2 & ~1;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
- pifsr++;
- }
-
- else if (ep_used /* sst.w <reg>,<offset>[ep] */
- && ((insn & 0x0781) == 0x0501)
- && pifsr
- && (((reg = (insn >> 11) & 0x1f) >= SAVE1_START_REGNUM && reg <= SAVE1_END_REGNUM)
- || (reg >= SAVE2_START_REGNUM && reg <= SAVE2_END_REGNUM)
- || (reg >= SAVE3_START_REGNUM && reg <= SAVE3_END_REGNUM)))
- {
- pifsr->reg = reg;
- pifsr->offset = (insn & 0x007e) << 1;
- pifsr->cur_frameoffset = pi->frameoffset;
-#ifdef DEBUG
- printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset);
-#endif
- pifsr++;
- }
-
-#ifdef DEBUG
- printf_filtered ("\n");
-#endif
- }
-
- if (pifsr)
- pifsr->framereg = 0; /* Tie off last entry */
-
- /* Fix up any offsets to the final offset. If a frame pointer was created, use it
- instead of the stack pointer. */
- for (pifsr_tmp = pi->pifsrs; pifsr_tmp && pifsr_tmp != pifsr; pifsr_tmp++)
- {
- pifsr_tmp->offset -= pi->frameoffset - pifsr_tmp->cur_frameoffset;
- pifsr_tmp->framereg = pi->framereg;
-
-#ifdef DEBUG
- printf_filtered ("Saved register r%d, offset = %d, framereg = r%d\n",
- pifsr_tmp->reg, pifsr_tmp->offset, pifsr_tmp->framereg);
-#endif
- }
-
-#ifdef DEBUG
- printf_filtered ("Framereg = r%d, frameoffset = %d\n", pi->framereg, pi->frameoffset);
-#endif
-
- return current_pc;
-}
-
-/* Function: init_extra_frame_info
- Setup the frame's frame pointer, pc, and frame addresses for saved
- registers. Most of the work is done in scan_prologue().
-
- Note that when we are called for the last frame (currently active frame),
- that fi->pc and fi->frame will already be setup. However, fi->frame will
- be valid only if this routine uses FP. For previous frames, fi-frame will
- always be correct (since that is derived from v850_frame_chain ()).
-
- We can be called with the PC in the call dummy under two circumstances.
- First, during normal backtracing, second, while figuring out the frame
- pointer just prior to calling the target function (see run_stack_dummy). */
-
-void
-v850_init_extra_frame_info (fi)
- struct frame_info *fi;
-{
- struct prologue_info pi;
- struct pifsr pifsrs[NUM_REGS + 1], *pifsr;
-
- if (fi->next)
- fi->pc = FRAME_SAVED_PC (fi->next);
-
- memset (fi->fsr.regs, '\000', sizeof fi->fsr.regs);
-
- /* The call dummy doesn't save any registers on the stack, so we can return
- now. */
- if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
- return;
-
- pi.pifsrs = pifsrs;
-
- v850_scan_prologue (fi->pc, &pi);
-
- if (!fi->next && pi.framereg == SP_REGNUM)
- fi->frame = read_register (pi.framereg) - pi.frameoffset;
-
- for (pifsr = pifsrs; pifsr->framereg; pifsr++)
- {
- fi->fsr.regs[pifsr->reg] = pifsr->offset + fi->frame;
-
- if (pifsr->framereg == SP_REGNUM)
- fi->fsr.regs[pifsr->reg] += pi.frameoffset;
- }
-}
-
-/* Function: frame_chain
- Figure out the frame prior to FI. Unfortunately, this involves
- scanning the prologue of the caller, which will also be done
- shortly by v850_init_extra_frame_info. For the dummy frame, we
- just return the stack pointer that was in use at the time the
- function call was made. */
-
-CORE_ADDR
-v850_frame_chain (fi)
- struct frame_info *fi;
-{
- struct prologue_info pi;
- CORE_ADDR callers_pc, fp;
-
- /* First, find out who called us */
- callers_pc = FRAME_SAVED_PC (fi);
- /* If caller is a call-dummy, then our FP bears no relation to his FP! */
- fp = v850_find_callers_reg (fi, FP_RAW_REGNUM);
- if (PC_IN_CALL_DUMMY(callers_pc, fp, fp))
- return fp; /* caller is call-dummy: return oldest value of FP */
-
- /* Caller is NOT a call-dummy, so everything else should just work.
- Even if THIS frame is a call-dummy! */
- pi.pifsrs = NULL;
-
- v850_scan_prologue (callers_pc, &pi);
-
- if (pi.start_function)
- return 0; /* Don't chain beyond the start function */
-
- if (pi.framereg == FP_RAW_REGNUM)
- return v850_find_callers_reg (fi, pi.framereg);
-
- return fi->frame - pi.frameoffset;
-}
-
-/* Function: find_callers_reg
- Find REGNUM on the stack. Otherwise, it's in an active register.
- One thing we might want to do here is to check REGNUM against the
- clobber mask, and somehow flag it as invalid if it isn't saved on
- the stack somewhere. This would provide a graceful failure mode
- when trying to get the value of caller-saves registers for an inner
- frame. */
-
-CORE_ADDR
-v850_find_callers_reg (fi, regnum)
- struct frame_info *fi;
- int regnum;
-{
- for (; fi; fi = fi->next)
- if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
- return generic_read_register_dummy (fi->pc, fi->frame, regnum);
- else if (fi->fsr.regs[regnum] != 0)
- return read_memory_unsigned_integer (fi->fsr.regs[regnum],
- REGISTER_RAW_SIZE(regnum));
-
- return read_register (regnum);
-}
-
-/* Function: skip_prologue
- Return the address of the first code past the prologue of the function. */
-
-CORE_ADDR
-v850_skip_prologue (pc)
- CORE_ADDR pc;
-{
- CORE_ADDR func_addr, func_end;
-
- /* See what the symbol table says */
-
- if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
- {
- struct symtab_and_line sal;
-
- sal = find_pc_line (func_addr, 0);
-
- if (sal.line != 0 && sal.end < func_end)
- return sal.end;
- else
- /* Either there's no line info, or the line after the prologue is after
- the end of the function. In this case, there probably isn't a
- prologue. */
- return pc;
- }
-
-/* We can't find the start of this function, so there's nothing we can do. */
- return pc;
-}
-
-/* Function: pop_frame
- This routine gets called when either the user uses the `return'
- command, or the call dummy breakpoint gets hit. */
-
-void
-v850_pop_frame (frame)
- struct frame_info *frame;
-{
- int regnum;
-
- if (PC_IN_CALL_DUMMY(frame->pc, frame->frame, frame->frame))
- generic_pop_dummy_frame ();
- else
- {
- write_register (PC_REGNUM, FRAME_SAVED_PC (frame));
-
- for (regnum = 0; regnum < NUM_REGS; regnum++)
- if (frame->fsr.regs[regnum] != 0)
- write_register (regnum,
- read_memory_unsigned_integer (frame->fsr.regs[regnum],
- REGISTER_RAW_SIZE(regnum)));
-
- write_register (SP_REGNUM, FRAME_FP (frame));
- }
-
- flush_cached_frames ();
-}
-
-/* Function: push_arguments
- Setup arguments and RP for a call to the target. First four args
- go in R6->R9, subsequent args go into sp + 16 -> sp + ... Structs
- are passed by reference. 64 bit quantities (doubles and long
- longs) may be split between the regs and the stack. When calling a
- function that returns a struct, a pointer to the struct is passed
- in as a secret first argument (always in R6).
-
- Stack space for the args has NOT been allocated: that job is up to us.
- */
-
-CORE_ADDR
-v850_push_arguments (nargs, args, sp, struct_return, struct_addr)
- int nargs;
- value_ptr *args;
- CORE_ADDR sp;
- unsigned char struct_return;
- CORE_ADDR struct_addr;
-{
- int argreg;
- int argnum;
- int len = 0;
- int stack_offset;
-
- /* First, just for safety, make sure stack is aligned */
- sp &= ~3;
-
- /* Now make space on the stack for the args. */
- for (argnum = 0; argnum < nargs; argnum++)
- len += ((TYPE_LENGTH(VALUE_TYPE(args[argnum])) + 3) & ~3);
- sp -= len; /* possibly over-allocating, but it works... */
- /* (you might think we could allocate 16 bytes */
- /* less, but the ABI seems to use it all! ) */
- argreg = ARG0_REGNUM;
-
- /* the struct_return pointer occupies the first parameter-passing reg */
- if (struct_return)
- write_register (argreg++, struct_addr);
-
- stack_offset = 16;
- /* The offset onto the stack at which we will start copying parameters
- (after the registers are used up) begins at 16 rather than at zero.
- I don't really know why, that's just the way it seems to work. */
-
- /* Now load as many as possible of the first arguments into
- registers, and push the rest onto the stack. There are 16 bytes
- in four registers available. Loop thru args from first to last. */
- for (argnum = 0; argnum < nargs; argnum++)
- {
- int len;
- char *val;
- char valbuf[REGISTER_RAW_SIZE(ARG0_REGNUM)];
-
- if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT
- && TYPE_LENGTH (VALUE_TYPE (*args)) > 8)
- {
- store_address (valbuf, 4, VALUE_ADDRESS (*args));
- len = 4;
- val = valbuf;
- }
- else
- {
- len = TYPE_LENGTH (VALUE_TYPE (*args));
- val = (char *)VALUE_CONTENTS (*args);
- }
-
- while (len > 0)
- if (argreg <= ARGLAST_REGNUM)
- {
- CORE_ADDR regval;
-
- regval = extract_address (val, REGISTER_RAW_SIZE (argreg));
- write_register (argreg, regval);
-
- len -= REGISTER_RAW_SIZE (argreg);
- val += REGISTER_RAW_SIZE (argreg);
- argreg++;
- }
- else
- {
- write_memory (sp + stack_offset, val, 4);
-
- len -= 4;
- val += 4;
- stack_offset += 4;
- }
- args++;
- }
- return sp;
-}
-
-/* Function: push_return_address (pc)
- Set up the return address for the inferior function call.
- Needed for targets where we don't actually execute a JSR/BSR instruction */
-
-CORE_ADDR
-v850_push_return_address (pc, sp)
- CORE_ADDR pc;
- CORE_ADDR sp;
-{
- write_register (RP_REGNUM, CALL_DUMMY_ADDRESS ());
- return sp;
-}
-
-/* Function: frame_saved_pc
- Find the caller of this frame. We do this by seeing if RP_REGNUM
- is saved in the stack anywhere, otherwise we get it from the
- registers. If the inner frame is a dummy frame, return its PC
- instead of RP, because that's where "caller" of the dummy-frame
- will be found. */
-
-CORE_ADDR
-v850_frame_saved_pc (fi)
- struct frame_info *fi;
-{
- if (PC_IN_CALL_DUMMY(fi->pc, fi->frame, fi->frame))
- return generic_read_register_dummy(fi->pc, fi->frame, PC_REGNUM);
- else
- return v850_find_callers_reg (fi, RP_REGNUM);
-}
-
-void
-get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
- char *raw_buffer;
- int *optimized;
- CORE_ADDR *addrp;
- struct frame_info *frame;
- int regnum;
- enum lval_type *lval;
-{
- generic_get_saved_register (raw_buffer, optimized, addrp,
- frame, regnum, lval);
-}
-
-
-/* Function: fix_call_dummy
- Pokes the callee function's address into the CALL_DUMMY assembly stub.
- Assumes that the CALL_DUMMY looks like this:
- jarl <offset24>, r31
- trap
- */
-
-int
-v850_fix_call_dummy (dummy, sp, fun, nargs, args, type, gcc_p)
- char *dummy;
- CORE_ADDR sp;
- CORE_ADDR fun;
- int nargs;
- value_ptr *args;
- struct type *type;
- int gcc_p;
-{
- long offset24;
-
- offset24 = (long) fun - (long) entry_point_address ();
- offset24 &= 0x3fffff;
- offset24 |= 0xff800000; /* jarl <offset24>, r31 */
-
- store_unsigned_integer ((unsigned int *)&dummy[2], 2, offset24 & 0xffff);
- store_unsigned_integer ((unsigned int *)&dummy[0], 2, offset24 >> 16);
- return 0;
-}
-
-/* Change the register names based on the current machine type. */
-
-static int
-v850_target_architecture_hook (ap)
- const bfd_arch_info_type *ap;
-{
- int i, j;
-
- if (ap->arch != bfd_arch_v850)
- return 0;
-
- for (i = 0; v850_processor_type_table[i].regnames != NULL; i++)
- {
- if (v850_processor_type_table[i].mach == ap->mach)
- {
- v850_register_names = v850_processor_type_table[i].regnames;
- return 1;
- }
- }
-
- fatal ("Architecture `%s' unreconized", ap->printable_name);
-}
-
-void
-_initialize_v850_tdep ()
-{
- tm_print_insn = print_insn_v850;
- target_architecture_hook = v850_target_architecture_hook;
-}