Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997
Free Software Foundation, Inc.
-This file is part of GDB.
+ 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 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.
+ 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. */
+ 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"
/* Breakpoint shadows for the single step instructions will be kept here. */
-static struct sstep_breaks {
- /* Address, or 0 if this is not in use. */
- CORE_ADDR address;
- /* Shadow contents. */
- char data[4];
-} stepBreaks[2];
+static struct sstep_breaks
+ {
+ /* Address, or 0 if this is not in use. */
+ CORE_ADDR address;
+ /* Shadow contents. */
+ char data[4];
+ }
+stepBreaks[2];
/* Hook for determining the TOC address when calling functions in the
inferior under AIX. The initialization code in rs6000-nat.c sets
/* Static function prototypes */
-static CORE_ADDR branch_dest PARAMS ((int opcode, int instr, CORE_ADDR pc,
- CORE_ADDR safety));
+ static CORE_ADDR branch_dest PARAMS ((int opcode, int instr, CORE_ADDR pc,
+ CORE_ADDR safety));
+
+ static void frame_get_saved_regs PARAMS ((struct frame_info * fi,
+ struct rs6000_framedata * fdatap));
-static void frame_get_saved_regs PARAMS ((struct frame_info *fi,
- struct rs6000_framedata *fdatap));
+ static void pop_dummy_frame PARAMS ((void));
-static void pop_dummy_frame PARAMS ((void));
+ static CORE_ADDR frame_initial_stack_address PARAMS ((struct frame_info *));
+
+CORE_ADDR
+rs6000_skip_prologue (pc)
+ CORE_ADDR pc;
+{
+ struct rs6000_framedata frame;
+ pc = skip_prologue (pc, &frame);
+ return pc;
+}
-static CORE_ADDR frame_initial_stack_address PARAMS ((struct frame_info *));
/* Fill in fi->saved_regs */
r31 by gcc) in such cases. If a compiler emits traceback table,
then we should use the alloca register specified in traceback
table. FIXME. */
- CORE_ADDR initial_sp; /* initial stack pointer. */
+ CORE_ADDR initial_sp; /* initial stack pointer. */
};
void
int fromleaf;
struct frame_info *fi;
{
- fi->extra_info = (struct frame_extra_info*)
+ fi->extra_info = (struct frame_extra_info *)
frame_obstack_alloc (sizeof (struct frame_extra_info));
fi->extra_info->initial_sp = 0;
if (fi->next != (CORE_ADDR) 0
absolute = (int) ((instr >> 1) & 1);
- switch (opcode) {
- case 18 :
- immediate = ((instr & ~3) << 6) >> 6; /* br unconditional */
- if (absolute)
- dest = immediate;
- else
- dest = pc + immediate;
- break;
-
- case 16 :
- immediate = ((instr & ~3) << 16) >> 16; /* br conditional */
- if (absolute)
- dest = immediate;
- else
- dest = pc + immediate;
- break;
-
- case 19 :
- ext_op = (instr>>1) & 0x3ff;
-
- if (ext_op == 16) /* br conditional register */
- {
+ switch (opcode)
+ {
+ case 18:
+ immediate = ((instr & ~3) << 6) >> 6; /* br unconditional */
+ if (absolute)
+ dest = immediate;
+ else
+ dest = pc + immediate;
+ break;
+
+ case 16:
+ immediate = ((instr & ~3) << 16) >> 16; /* br conditional */
+ if (absolute)
+ dest = immediate;
+ else
+ dest = pc + immediate;
+ break;
+
+ case 19:
+ ext_op = (instr >> 1) & 0x3ff;
+
+ if (ext_op == 16) /* br conditional register */
+ {
+ dest = read_register (LR_REGNUM) & ~3;
+
+ /* If we are about to return from a signal handler, dest is
+ something like 0x3c90. The current frame is a signal handler
+ caller frame, upon completion of the sigreturn system call
+ execution will return to the saved PC in the frame. */
+ if (dest < TEXT_SEGMENT_BASE)
+ {
+ struct frame_info *fi;
+
+ fi = get_current_frame ();
+ if (fi != NULL)
+ dest = read_memory_integer (fi->frame + SIG_FRAME_PC_OFFSET,
+ 4);
+ }
+ }
+
+ else if (ext_op == 528) /* br cond to count reg */
+ {
+ dest = read_register (CTR_REGNUM) & ~3;
+
+ /* If we are about to execute a system call, dest is something
+ like 0x22fc or 0x3b00. Upon completion the system call
+ will return to the address in the link register. */
+ if (dest < TEXT_SEGMENT_BASE)
dest = read_register (LR_REGNUM) & ~3;
+ }
+ else
+ return -1;
+ break;
- /* If we are about to return from a signal handler, dest is
- something like 0x3c90. The current frame is a signal handler
- caller frame, upon completion of the sigreturn system call
- execution will return to the saved PC in the frame. */
- if (dest < TEXT_SEGMENT_BASE)
- {
- struct frame_info *fi;
-
- fi = get_current_frame ();
- if (fi != NULL)
- dest = read_memory_integer (fi->frame + SIG_FRAME_PC_OFFSET,
- 4);
- }
- }
-
- else if (ext_op == 528) /* br cond to count reg */
- {
- dest = read_register (CTR_REGNUM) & ~3;
-
- /* If we are about to execute a system call, dest is something
- like 0x22fc or 0x3b00. Upon completion the system call
- will return to the address in the link register. */
- if (dest < TEXT_SEGMENT_BASE)
- dest = read_register (LR_REGNUM) & ~3;
- }
- else return -1;
- break;
-
- default: return -1;
- }
+ default:
+ return -1;
+ }
return (dest < TEXT_SEGMENT_BASE) ? safety : dest;
}
CORE_ADDR breaks[2];
int opcode;
- if (insert_breakpoints_p) {
+ if (insert_breakpoints_p)
+ {
- loc = read_pc ();
+ loc = read_pc ();
- insn = read_memory_integer (loc, 4);
+ insn = read_memory_integer (loc, 4);
- breaks[0] = loc + INSNLEN(insn);
- opcode = insn >> 26;
- breaks[1] = branch_dest (opcode, insn, loc, breaks[0]);
+ breaks[0] = loc + INSNLEN (insn);
+ opcode = insn >> 26;
+ breaks[1] = branch_dest (opcode, insn, loc, breaks[0]);
- /* Don't put two breakpoints on the same address. */
- if (breaks[1] == breaks[0])
- breaks[1] = -1;
+ /* Don't put two breakpoints on the same address. */
+ if (breaks[1] == breaks[0])
+ breaks[1] = -1;
- stepBreaks[1].address = 0;
+ stepBreaks[1].address = 0;
- for (ii=0; ii < 2; ++ii) {
+ for (ii = 0; ii < 2; ++ii)
+ {
- /* ignore invalid breakpoint. */
- if ( breaks[ii] == -1)
- continue;
+ /* ignore invalid breakpoint. */
+ if (breaks[ii] == -1)
+ continue;
- read_memory (breaks[ii], stepBreaks[ii].data, 4);
+ read_memory (breaks[ii], stepBreaks[ii].data, 4);
- write_memory (breaks[ii], breakp, 4);
- stepBreaks[ii].address = breaks[ii];
- }
+ write_memory (breaks[ii], breakp, 4);
+ stepBreaks[ii].address = breaks[ii];
+ }
- } else {
+ }
+ else
+ {
- /* remove step breakpoints. */
- for (ii=0; ii < 2; ++ii)
- if (stepBreaks[ii].address != 0)
- write_memory
- (stepBreaks[ii].address, stepBreaks[ii].data, 4);
+ /* remove step breakpoints. */
+ for (ii = 0; ii < 2; ++ii)
+ if (stepBreaks[ii].address != 0)
+ write_memory
+ (stepBreaks[ii].address, stepBreaks[ii].data, 4);
- }
+ }
errno = 0; /* FIXME, don't ignore errors! */
- /* What errors? {read,write}_memory call error(). */
+ /* What errors? {read,write}_memory call error(). */
}
information about a function frame.
in struct rs6000_framedata fdata:
- - frameless is TRUE, if function does not have a frame.
- - nosavedpc is TRUE, if function does not save %pc value in its frame.
- - offset is the initial size of this stack frame --- the amount by
- which we decrement the sp to allocate the frame.
- - saved_gpr is the number of the first saved gpr.
- - saved_fpr is the number of the first saved fpr.
- - alloca_reg is the number of the register used for alloca() handling.
- Otherwise -1.
- - gpr_offset is the offset of the first saved gpr from the previous frame.
- - fpr_offset is the offset of the first saved fpr from the previous frame.
- - lr_offset is the offset of the saved lr
- - cr_offset is the offset of the saved cr
-*/
+ - frameless is TRUE, if function does not have a frame.
+ - nosavedpc is TRUE, if function does not save %pc value in its frame.
+ - offset is the initial size of this stack frame --- the amount by
+ which we decrement the sp to allocate the frame.
+ - saved_gpr is the number of the first saved gpr.
+ - saved_fpr is the number of the first saved fpr.
+ - alloca_reg is the number of the register used for alloca() handling.
+ Otherwise -1.
+ - gpr_offset is the offset of the first saved gpr from the previous frame.
+ - fpr_offset is the offset of the first saved fpr from the previous frame.
+ - lr_offset is the offset of the saved lr
+ - cr_offset is the offset of the saved cr
+ */
#define SIGNED_SHORT(x) \
((sizeof (short) == 2) \
CORE_ADDR
skip_prologue (pc, fdata)
CORE_ADDR pc;
- struct rs6000_framedata *fdata;
+ struct rs6000_framedata *fdata;
{
CORE_ADDR orig_pc = pc;
char buf[4];
pc += 4;
op = read_memory_integer (pc, 4);
- if ((op & 0xfc1fffff) == 0x7c0802a6) { /* mflr Rx */
- lr_reg = (op & 0x03e00000) | 0x90010000;
- continue;
+ if ((op & 0xfc1fffff) == 0x7c0802a6)
+ { /* mflr Rx */
+ lr_reg = (op & 0x03e00000) | 0x90010000;
+ continue;
- } else if ((op & 0xfc1fffff) == 0x7c000026) { /* mfcr Rx */
- cr_reg = (op & 0x03e00000) | 0x90010000;
- continue;
+ }
+ else if ((op & 0xfc1fffff) == 0x7c000026)
+ { /* mfcr Rx */
+ cr_reg = (op & 0x03e00000) | 0x90010000;
+ continue;
- } else if ((op & 0xfc1f0000) == 0xd8010000) { /* stfd Rx,NUM(r1) */
- reg = GET_SRC_REG (op);
- if (fdata->saved_fpr == -1 || fdata->saved_fpr > reg) {
- fdata->saved_fpr = reg;
- fdata->fpr_offset = SIGNED_SHORT (op) + offset;
}
- continue;
+ else if ((op & 0xfc1f0000) == 0xd8010000)
+ { /* stfd Rx,NUM(r1) */
+ reg = GET_SRC_REG (op);
+ if (fdata->saved_fpr == -1 || fdata->saved_fpr > reg)
+ {
+ fdata->saved_fpr = reg;
+ fdata->fpr_offset = SIGNED_SHORT (op) + offset;
+ }
+ continue;
- } else if (((op & 0xfc1f0000) == 0xbc010000) || /* stm Rx, NUM(r1) */
- ((op & 0xfc1f0000) == 0x90010000 && /* st rx,NUM(r1),
+ }
+ else if (((op & 0xfc1f0000) == 0xbc010000) || /* stm Rx, NUM(r1) */
+ ((op & 0xfc1f0000) == 0x90010000 && /* st rx,NUM(r1),
rx >= r13 */
- (op & 0x03e00000) >= 0x01a00000)) {
+ (op & 0x03e00000) >= 0x01a00000))
+ {
+
+ reg = GET_SRC_REG (op);
+ if (fdata->saved_gpr == -1 || fdata->saved_gpr > reg)
+ {
+ fdata->saved_gpr = reg;
+ fdata->gpr_offset = SIGNED_SHORT (op) + offset;
+ }
+ continue;
- reg = GET_SRC_REG (op);
- if (fdata->saved_gpr == -1 || fdata->saved_gpr > reg) {
- fdata->saved_gpr = reg;
- fdata->gpr_offset = SIGNED_SHORT (op) + offset;
}
- continue;
-
- } else if ((op & 0xffff0000) == 0x3c000000) { /* addis 0,0,NUM, used
- for >= 32k frames */
- fdata->offset = (op & 0x0000ffff) << 16;
- fdata->frameless = 0;
- continue;
-
- } else if ((op & 0xffff0000) == 0x60000000) { /* ori 0,0,NUM, 2nd ha
- lf of >= 32k frames */
- fdata->offset |= (op & 0x0000ffff);
- fdata->frameless = 0;
- continue;
-
- } else if ((op & 0xffff0000) == lr_reg) { /* st Rx,NUM(r1)
- where Rx == lr */
- fdata->lr_offset = SIGNED_SHORT (op) + offset;
- fdata->nosavedpc = 0;
- lr_reg = 0;
- continue;
-
- } else if ((op & 0xffff0000) == cr_reg) { /* st Rx,NUM(r1)
- where Rx == cr */
- fdata->cr_offset = SIGNED_SHORT (op) + offset;
- cr_reg = 0;
- continue;
-
- } else if (op == 0x48000005) { /* bl .+4 used in
- -mrelocatable */
- continue;
-
- } else if (op == 0x48000004) { /* b .+4 (xlc) */
- break;
-
- } else if (((op & 0xffff0000) == 0x801e0000 || /* lwz 0,NUM(r30), used
- in V.4 -mrelocatable */
- op == 0x7fc0f214) && /* add r30,r0,r30, used
+ else if ((op & 0xffff0000) == 0x3c000000)
+ { /* addis 0,0,NUM, used
+ for >= 32k frames */
+ fdata->offset = (op & 0x0000ffff) << 16;
+ fdata->frameless = 0;
+ continue;
+
+ }
+ else if ((op & 0xffff0000) == 0x60000000)
+ { /* ori 0,0,NUM, 2nd ha
+ lf of >= 32k frames */
+ fdata->offset |= (op & 0x0000ffff);
+ fdata->frameless = 0;
+ continue;
+
+ }
+ else if ((op & 0xffff0000) == lr_reg)
+ { /* st Rx,NUM(r1)
+ where Rx == lr */
+ fdata->lr_offset = SIGNED_SHORT (op) + offset;
+ fdata->nosavedpc = 0;
+ lr_reg = 0;
+ continue;
+
+ }
+ else if ((op & 0xffff0000) == cr_reg)
+ { /* st Rx,NUM(r1)
+ where Rx == cr */
+ fdata->cr_offset = SIGNED_SHORT (op) + offset;
+ cr_reg = 0;
+ continue;
+
+ }
+ else if (op == 0x48000005)
+ { /* bl .+4 used in
+ -mrelocatable */
+ continue;
+
+ }
+ else if (op == 0x48000004)
+ { /* b .+4 (xlc) */
+ break;
+
+ }
+ else if (((op & 0xffff0000) == 0x801e0000 || /* lwz 0,NUM(r30), used
in V.4 -mrelocatable */
- lr_reg == 0x901e0000) {
- continue;
+ op == 0x7fc0f214) && /* add r30,r0,r30, used
+ in V.4 -mrelocatable */
+ lr_reg == 0x901e0000)
+ {
+ continue;
- } else if ((op & 0xffff0000) == 0x3fc00000 || /* addis 30,0,foo@ha, used
+ }
+ else if ((op & 0xffff0000) == 0x3fc00000 || /* addis 30,0,foo@ha, used
in V.4 -mminimal-toc */
- (op & 0xffff0000) == 0x3bde0000) { /* addi 30,30,foo@l */
- continue;
+ (op & 0xffff0000) == 0x3bde0000)
+ { /* addi 30,30,foo@l */
+ continue;
- } else if ((op & 0xfc000000) == 0x48000000) { /* bl foo,
- to save fprs??? */
+ }
+ else if ((op & 0xfc000001) == 0x48000001)
+ { /* bl foo,
+ to save fprs??? */
- fdata->frameless = 0;
- /* Don't skip over the subroutine call if it is not within the first
- three instructions of the prologue. */
- if ((pc - orig_pc) > 8)
- break;
+ fdata->frameless = 0;
+ /* Don't skip over the subroutine call if it is not within the first
+ three instructions of the prologue. */
+ if ((pc - orig_pc) > 8)
+ break;
- op = read_memory_integer (pc+4, 4);
-
- /* At this point, make sure this is not a trampoline function
- (a function that simply calls another functions, and nothing else).
- If the next is not a nop, this branch was part of the function
- prologue. */
-
- if (op == 0x4def7b82 || op == 0) /* crorc 15, 15, 15 */
- break; /* don't skip over
- this branch */
- continue;
-
- /* update stack pointer */
- } else if ((op & 0xffff0000) == 0x94210000) { /* stu r1,NUM(r1) */
- fdata->frameless = 0;
- fdata->offset = SIGNED_SHORT (op);
- offset = fdata->offset;
- continue;
-
- } else if (op == 0x7c21016e) { /* stwux 1,1,0 */
- fdata->frameless = 0;
- offset = fdata->offset;
- continue;
-
- /* Load up minimal toc pointer */
- } else if ((op >> 22) == 0x20f
- && ! minimal_toc_loaded) { /* l r31,... or l r30,... */
- minimal_toc_loaded = 1;
- continue;
-
- /* store parameters in stack */
- } else if ((op & 0xfc1f0000) == 0x90010000 || /* st rx,NUM(r1) */
- (op & 0xfc1f0000) == 0xd8010000 || /* stfd Rx,NUM(r1) */
- (op & 0xfc1f0000) == 0xfc010000) { /* frsp, fp?,NUM(r1) */
- continue;
-
- /* store parameters in stack via frame pointer */
- } else if (framep &&
- ((op & 0xfc1f0000) == 0x901f0000 || /* st rx,NUM(r1) */
- (op & 0xfc1f0000) == 0xd81f0000 || /* stfd Rx,NUM(r1) */
- (op & 0xfc1f0000) == 0xfc1f0000)) { /* frsp, fp?,NUM(r1) */
- continue;
-
- /* Set up frame pointer */
- } else if (op == 0x603f0000 /* oril r31, r1, 0x0 */
- || op == 0x7c3f0b78) { /* mr r31, r1 */
- fdata->frameless = 0;
- framep = 1;
- fdata->alloca_reg = 31;
- continue;
-
- /* Another way to set up the frame pointer. */
- } else if ((op & 0xfc1fffff) == 0x38010000) { /* addi rX, r1, 0x0 */
- fdata->frameless = 0;
- framep = 1;
- fdata->alloca_reg = (op & ~0x38010000) >> 21;
- continue;
-
- } else {
- break;
- }
+ op = read_memory_integer (pc + 4, 4);
+
+ /* At this point, make sure this is not a trampoline function
+ (a function that simply calls another functions, and nothing else).
+ If the next is not a nop, this branch was part of the function
+ prologue. */
+
+ if (op == 0x4def7b82 || op == 0) /* crorc 15, 15, 15 */
+ break; /* don't skip over
+ this branch */
+ continue;
+
+ /* update stack pointer */
+ }
+ else if ((op & 0xffff0000) == 0x94210000)
+ { /* stu r1,NUM(r1) */
+ fdata->frameless = 0;
+ fdata->offset = SIGNED_SHORT (op);
+ offset = fdata->offset;
+ continue;
+
+ }
+ else if (op == 0x7c21016e)
+ { /* stwux 1,1,0 */
+ fdata->frameless = 0;
+ offset = fdata->offset;
+ continue;
+
+ /* Load up minimal toc pointer */
+ }
+ else if ((op >> 22) == 0x20f
+ && !minimal_toc_loaded)
+ { /* l r31,... or l r30,... */
+ minimal_toc_loaded = 1;
+ continue;
+
+ /* store parameters in stack */
+ }
+ else if ((op & 0xfc1f0000) == 0x90010000 || /* st rx,NUM(r1) */
+ (op & 0xfc1f0000) == 0xd8010000 || /* stfd Rx,NUM(r1) */
+ (op & 0xfc1f0000) == 0xfc010000)
+ { /* frsp, fp?,NUM(r1) */
+ continue;
+
+ /* store parameters in stack via frame pointer */
+ }
+ else if (framep &&
+ ((op & 0xfc1f0000) == 0x901f0000 || /* st rx,NUM(r1) */
+ (op & 0xfc1f0000) == 0xd81f0000 || /* stfd Rx,NUM(r1) */
+ (op & 0xfc1f0000) == 0xfc1f0000))
+ { /* frsp, fp?,NUM(r1) */
+ continue;
+
+ /* Set up frame pointer */
+ }
+ else if (op == 0x603f0000 /* oril r31, r1, 0x0 */
+ || op == 0x7c3f0b78)
+ { /* mr r31, r1 */
+ fdata->frameless = 0;
+ framep = 1;
+ fdata->alloca_reg = 31;
+ continue;
+
+ /* Another way to set up the frame pointer. */
+ }
+ else if ((op & 0xfc1fffff) == 0x38010000)
+ { /* addi rX, r1, 0x0 */
+ fdata->frameless = 0;
+ framep = 1;
+ fdata->alloca_reg = (op & ~0x38010000) >> 21;
+ continue;
+
+ }
+ else
+ {
+ break;
+ }
}
#if 0
We'd like to skip over it as well. Fortunately, xlc does some extra
work before calling a function right after a prologue, thus we can
single out such gcc2 behaviour. */
-
- if ((op & 0xfc000001) == 0x48000001) { /* bl foo, an initializer function? */
- op = read_memory_integer (pc+4, 4);
- if (op == 0x4def7b82) { /* cror 0xf, 0xf, 0xf (nop) */
+ if ((op & 0xfc000001) == 0x48000001)
+ { /* bl foo, an initializer function? */
+ op = read_memory_integer (pc + 4, 4);
+
+ if (op == 0x4def7b82)
+ { /* cror 0xf, 0xf, 0xf (nop) */
- /* check and see if we are in main. If so, skip over this initializer
- function as well. */
+ /* check and see if we are in main. If so, skip over this initializer
+ function as well. */
- tmp = find_pc_misc_function (pc);
- if (tmp >= 0 && STREQ (misc_function_vector [tmp].name, "main"))
- return pc + 8;
+ tmp = find_pc_misc_function (pc);
+ if (tmp >= 0 && STREQ (misc_function_vector[tmp].name, "main"))
+ return pc + 8;
+ }
}
- }
#endif /* 0 */
-
- fdata->offset = - fdata->offset;
+
+ fdata->offset = -fdata->offset;
return pc;
}
/* The total size of dummy frame is 436, which is;
- 32 gpr's - 128 bytes
- 32 fpr's - 256 "
- 7 the rest - 28 "
- and 24 extra bytes for the callee's link area. The last 24 bytes
- for the link area might not be necessary, since it will be taken
- care of by push_arguments(). */
+ 32 gpr's - 128 bytes
+ 32 fpr's - 256 "
+ 7 the rest - 28 "
+ and 24 extra bytes for the callee's link area. The last 24 bytes
+ for the link area might not be necessary, since it will be taken
+ care of by push_arguments(). */
#define DUMMY_FRAME_SIZE 436
/* push a dummy frame into stack, save all register. Currently we are saving
only gpr's and fpr's, which is not good enough! FIXMEmgo */
-
+
void
push_dummy_frame ()
{
CORE_ADDR pc;
/* Same thing, target byte order. */
char pc_targ[4];
-
+
/* Needed to figure out where to save the dummy link area.
FIXME: There should be an easier way to do this, no? tiemann 9/9/95. */
struct rs6000_framedata fdata;
target_fetch_registers (-1);
- if (dummy_frame_count >= dummy_frame_size) {
- dummy_frame_size += DUMMY_FRAME_ADDR_SIZE;
- if (dummy_frame_addr)
- dummy_frame_addr = (CORE_ADDR*) xrealloc
- (dummy_frame_addr, sizeof(CORE_ADDR) * (dummy_frame_size));
- else
- dummy_frame_addr = (CORE_ADDR*)
- xmalloc (sizeof(CORE_ADDR) * (dummy_frame_size));
- }
-
- sp = read_register(SP_REGNUM);
- pc = read_register(PC_REGNUM);
+ if (dummy_frame_count >= dummy_frame_size)
+ {
+ dummy_frame_size += DUMMY_FRAME_ADDR_SIZE;
+ if (dummy_frame_addr)
+ dummy_frame_addr = (CORE_ADDR *) xrealloc
+ (dummy_frame_addr, sizeof (CORE_ADDR) * (dummy_frame_size));
+ else
+ dummy_frame_addr = (CORE_ADDR *)
+ xmalloc (sizeof (CORE_ADDR) * (dummy_frame_size));
+ }
+
+ sp = read_register (SP_REGNUM);
+ pc = read_register (PC_REGNUM);
store_address (pc_targ, 4, pc);
skip_prologue (get_pc_function_start (pc), &fdata);
- dummy_frame_addr [dummy_frame_count++] = sp;
+ dummy_frame_addr[dummy_frame_count++] = sp;
/* Be careful! If the stack pointer is not decremented first, then kernel
thinks he is free to use the space underneath it. And kernel actually
This is a problem on the ppc simulator (which only grants one page
(4096 bytes) by default. */
- write_register (SP_REGNUM, sp-DUMMY_FRAME_SIZE);
+ write_register (SP_REGNUM, sp - DUMMY_FRAME_SIZE);
/* gdb relies on the state of current_frame. We'd better update it,
otherwise things like do_registers_info() wouldn't work properly! */
/* save program counter in link register's space. */
write_memory (sp + (fdata.lr_offset ? fdata.lr_offset : DEFAULT_LR_SAVE),
- pc_targ, 4);
+ pc_targ, 4);
/* save all floating point and general purpose registers here. */
/* fpr's, f0..f31 */
for (ii = 0; ii < 32; ++ii)
- write_memory (sp-8-(ii*8), ®isters[REGISTER_BYTE (31-ii+FP0_REGNUM)], 8);
+ write_memory (sp - 8 - (ii * 8), ®isters[REGISTER_BYTE (31 - ii + FP0_REGNUM)], 8);
/* gpr's r0..r31 */
- for (ii=1; ii <=32; ++ii)
- write_memory (sp-256-(ii*4), ®isters[REGISTER_BYTE (32-ii)], 4);
+ for (ii = 1; ii <= 32; ++ii)
+ write_memory (sp - 256 - (ii * 4), ®isters[REGISTER_BYTE (32 - ii)], 4);
/* so far, 32*2 + 32 words = 384 bytes have been written.
7 extra registers in our register set: pc, ps, cnd, lr, cnt, xer, mq */
- for (ii=1; ii <= (LAST_UISA_SP_REGNUM-FIRST_UISA_SP_REGNUM+1); ++ii) {
- write_memory (sp-384-(ii*4),
- ®isters[REGISTER_BYTE (FPLAST_REGNUM + ii)], 4);
- }
+ for (ii = 1; ii <= (LAST_UISA_SP_REGNUM - FIRST_UISA_SP_REGNUM + 1); ++ii)
+ {
+ write_memory (sp - 384 - (ii * 4),
+ ®isters[REGISTER_BYTE (FPLAST_REGNUM + ii)], 4);
+ }
/* Save sp or so called back chain right here. */
store_address (sp_targ, 4, sp);
- write_memory (sp-DUMMY_FRAME_SIZE, sp_targ, 4);
+ write_memory (sp - DUMMY_FRAME_SIZE, sp_targ, 4);
sp -= DUMMY_FRAME_SIZE;
/* And finally, this is the back chain. */
- write_memory (sp+8, pc_targ, 4);
+ write_memory (sp + 8, pc_targ, 4);
}
detect that was a dummy frame, we pop it back to its parent by using
dummy frame stack (`dummy_frame_addr' array).
-FIXME: This whole concept is broken. You should be able to detect
-a dummy stack frame *on the user's stack itself*. When you do,
-then you know the format of that stack frame -- including its
-saved SP register! There should *not* be a separate stack in the
-GDB process that keeps track of these dummy frames! -- gnu@cygnus.com Aug92
+ FIXME: This whole concept is broken. You should be able to detect
+ a dummy stack frame *on the user's stack itself*. When you do,
+ then you know the format of that stack frame -- including its
+ saved SP register! There should *not* be a separate stack in the
+ GDB process that keeps track of these dummy frames! -- gnu@cygnus.com Aug92
*/
-
+
static void
pop_dummy_frame ()
{
CORE_ADDR sp, pc;
int ii;
- sp = dummy_frame_addr [--dummy_frame_count];
+ sp = dummy_frame_addr[--dummy_frame_count];
/* restore all fpr's. */
for (ii = 1; ii <= 32; ++ii)
- read_memory (sp-(ii*8), ®isters[REGISTER_BYTE (32-ii+FP0_REGNUM)], 8);
+ read_memory (sp - (ii * 8), ®isters[REGISTER_BYTE (32 - ii + FP0_REGNUM)], 8);
/* restore all gpr's */
- for (ii=1; ii <= 32; ++ii) {
- read_memory (sp-256-(ii*4), ®isters[REGISTER_BYTE (32-ii)], 4);
- }
+ for (ii = 1; ii <= 32; ++ii)
+ {
+ read_memory (sp - 256 - (ii * 4), ®isters[REGISTER_BYTE (32 - ii)], 4);
+ }
/* restore the rest of the registers. */
- for (ii=1; ii <=(LAST_UISA_SP_REGNUM-FIRST_UISA_SP_REGNUM+1); ++ii)
- read_memory (sp-384-(ii*4),
- ®isters[REGISTER_BYTE (FPLAST_REGNUM + ii)], 4);
+ for (ii = 1; ii <= (LAST_UISA_SP_REGNUM - FIRST_UISA_SP_REGNUM + 1); ++ii)
+ read_memory (sp - 384 - (ii * 4),
+ ®isters[REGISTER_BYTE (FPLAST_REGNUM + ii)], 4);
- read_memory (sp-(DUMMY_FRAME_SIZE-8),
- ®isters [REGISTER_BYTE(PC_REGNUM)], 4);
+ read_memory (sp - (DUMMY_FRAME_SIZE - 8),
+ ®isters[REGISTER_BYTE (PC_REGNUM)], 4);
/* when a dummy frame was being pushed, we had to decrement %sp first, in
order to secure astack space. Thus, saved %sp (or %r1) value, is not the
one we should restore. Change it with the one we need. */
- memcpy (®isters [REGISTER_BYTE(FP_REGNUM)], (char *) &sp, sizeof (int));
+ memcpy (®isters[REGISTER_BYTE (FP_REGNUM)], (char *) &sp, sizeof (int));
/* Now we can restore all registers. */
void
pop_frame ()
{
- CORE_ADDR pc, lr, sp, prev_sp; /* %pc, %lr, %sp */
+ CORE_ADDR pc, lr, sp, prev_sp; /* %pc, %lr, %sp */
struct rs6000_framedata fdata;
struct frame_info *frame = get_current_frame ();
int addr, ii;
}
else
{
- if (dummy_frame_count)
+ if (dummy_frame_count)
pop_dummy_frame ();
return;
}
if (fdata.saved_gpr != -1)
{
addr = prev_sp + fdata.gpr_offset;
- for (ii = fdata.saved_gpr; ii <= 31; ++ii) {
- read_memory (addr, ®isters [REGISTER_BYTE (ii)], 4);
- addr += 4;
- }
+ for (ii = fdata.saved_gpr; ii <= 31; ++ii)
+ {
+ read_memory (addr, ®isters[REGISTER_BYTE (ii)], 4);
+ addr += 4;
+ }
}
if (fdata.saved_fpr != -1)
{
addr = prev_sp + fdata.fpr_offset;
- for (ii = fdata.saved_fpr; ii <= 31; ++ii) {
- read_memory (addr, ®isters [REGISTER_BYTE (ii+FP0_REGNUM)], 8);
- addr += 8;
- }
+ for (ii = fdata.saved_fpr; ii <= 31; ++ii)
+ {
+ read_memory (addr, ®isters[REGISTER_BYTE (ii + FP0_REGNUM)], 8);
+ addr += 8;
+ }
}
write_register (SP_REGNUM, prev_sp);
CORE_ADDR tocvalue;
tocvalue = (*find_toc_address_hook) (fun);
- ii = *(int*)((char*)dummyname + TOC_ADDR_OFFSET);
+ ii = *(int *) ((char *) dummyname + TOC_ADDR_OFFSET);
ii = (ii & 0xffff0000) | (tocvalue >> 16);
- *(int*)((char*)dummyname + TOC_ADDR_OFFSET) = ii;
+ *(int *) ((char *) dummyname + TOC_ADDR_OFFSET) = ii;
- ii = *(int*)((char*)dummyname + TOC_ADDR_OFFSET+4);
+ ii = *(int *) ((char *) dummyname + TOC_ADDR_OFFSET + 4);
ii = (ii & 0xffff0000) | (tocvalue & 0x0000ffff);
- *(int*)((char*)dummyname + TOC_ADDR_OFFSET+4) = ii;
+ *(int *) ((char *) dummyname + TOC_ADDR_OFFSET + 4) = ii;
}
target_addr = fun;
- ii = *(int*)((char*)dummyname + TARGET_ADDR_OFFSET);
+ ii = *(int *) ((char *) dummyname + TARGET_ADDR_OFFSET);
ii = (ii & 0xffff0000) | (target_addr >> 16);
- *(int*)((char*)dummyname + TARGET_ADDR_OFFSET) = ii;
+ *(int *) ((char *) dummyname + TARGET_ADDR_OFFSET) = ii;
- ii = *(int*)((char*)dummyname + TARGET_ADDR_OFFSET+4);
+ ii = *(int *) ((char *) dummyname + TARGET_ADDR_OFFSET + 4);
ii = (ii & 0xffff0000) | (target_addr & 0x0000ffff);
- *(int*)((char*)dummyname + TARGET_ADDR_OFFSET+4) = ii;
+ *(int *) ((char *) dummyname + TARGET_ADDR_OFFSET + 4) = ii;
}
/* Pass the arguments in either registers, or in the stack. In RS6000,
starting from r4. */
CORE_ADDR
-push_arguments (nargs, args, sp, struct_return, struct_addr)
+rs6000_push_arguments (nargs, args, sp, struct_return, struct_addr)
int nargs;
value_ptr *args;
CORE_ADDR sp;
{
int ii;
int len = 0;
- int argno; /* current argument number */
- int argbytes; /* current argument byte */
- char tmp_buffer [50];
- int f_argno = 0; /* current floating point argno */
+ int argno; /* current argument number */
+ int argbytes; /* current argument byte */
+ char tmp_buffer[50];
+ int f_argno = 0; /* current floating point argno */
value_ptr arg = 0;
struct type *type;
case we should advance one word and start from r4 register to copy
parameters. */
- ii = struct_return ? 1 : 0;
+ ii = struct_return ? 1 : 0;
/*
-effectively indirect call... gcc does...
-
-return_val example( float, int);
-
-eabi:
- float in fp0, int in r3
- offset of stack on overflow 8/16
- for varargs, must go by type.
-power open:
- float in r3&r4, int in r5
- offset of stack on overflow different
-both:
- return in r3 or f0. If no float, must study how gcc emulates floats;
- pay attention to arg promotion.
- User may have to cast\args to handle promotion correctly
- since gdb won't know if prototype supplied or not.
-*/
-
- for (argno=0, argbytes=0; argno < nargs && ii<8; ++ii) {
-
- arg = args[argno];
- type = check_typedef (VALUE_TYPE (arg));
- len = TYPE_LENGTH (type);
-
- if (TYPE_CODE (type) == TYPE_CODE_FLT) {
-
- /* floating point arguments are passed in fpr's, as well as gpr's.
- There are 13 fpr's reserved for passing parameters. At this point
- there is no way we would run out of them. */
-
- if (len > 8)
- printf_unfiltered (
-"Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
-
- memcpy (®isters[REGISTER_BYTE(FP0_REGNUM + 1 + f_argno)],
- VALUE_CONTENTS (arg),
- len);
- ++f_argno;
- }
+ effectively indirect call... gcc does...
+
+ return_val example( float, int);
+
+ eabi:
+ float in fp0, int in r3
+ offset of stack on overflow 8/16
+ for varargs, must go by type.
+ power open:
+ float in r3&r4, int in r5
+ offset of stack on overflow different
+ both:
+ return in r3 or f0. If no float, must study how gcc emulates floats;
+ pay attention to arg promotion.
+ User may have to cast\args to handle promotion correctly
+ since gdb won't know if prototype supplied or not.
+ */
+
+ for (argno = 0, argbytes = 0; argno < nargs && ii < 8; ++ii)
+ {
- if (len > 4) {
+ arg = args[argno];
+ type = check_typedef (VALUE_TYPE (arg));
+ len = TYPE_LENGTH (type);
- /* Argument takes more than one register. */
- while (argbytes < len) {
- memset (®isters[REGISTER_BYTE(ii+3)], 0, sizeof(int));
- memcpy (®isters[REGISTER_BYTE(ii+3)],
- ((char*)VALUE_CONTENTS (arg))+argbytes,
- (len - argbytes) > 4 ? 4 : len - argbytes);
- ++ii, argbytes += 4;
+ if (TYPE_CODE (type) == TYPE_CODE_FLT)
+ {
- if (ii >= 8)
- goto ran_out_of_registers_for_arguments;
- }
- argbytes = 0;
- --ii;
- }
- else { /* Argument can fit in one register. No problem. */
- memset (®isters[REGISTER_BYTE(ii+3)], 0, sizeof(int));
- memcpy (®isters[REGISTER_BYTE(ii+3)], VALUE_CONTENTS (arg), len);
+ /* floating point arguments are passed in fpr's, as well as gpr's.
+ There are 13 fpr's reserved for passing parameters. At this point
+ there is no way we would run out of them. */
+
+ if (len > 8)
+ printf_unfiltered (
+ "Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
+
+ memcpy (®isters[REGISTER_BYTE (FP0_REGNUM + 1 + f_argno)],
+ VALUE_CONTENTS (arg),
+ len);
+ ++f_argno;
+ }
+
+ if (len > 4)
+ {
+
+ /* Argument takes more than one register. */
+ while (argbytes < len)
+ {
+ memset (®isters[REGISTER_BYTE (ii + 3)], 0, sizeof (int));
+ memcpy (®isters[REGISTER_BYTE (ii + 3)],
+ ((char *) VALUE_CONTENTS (arg)) + argbytes,
+ (len - argbytes) > 4 ? 4 : len - argbytes);
+ ++ii, argbytes += 4;
+
+ if (ii >= 8)
+ goto ran_out_of_registers_for_arguments;
+ }
+ argbytes = 0;
+ --ii;
+ }
+ else
+ { /* Argument can fit in one register. No problem. */
+ memset (®isters[REGISTER_BYTE (ii + 3)], 0, sizeof (int));
+ memcpy (®isters[REGISTER_BYTE (ii + 3)], VALUE_CONTENTS (arg), len);
+ }
+ ++argno;
}
- ++argno;
- }
ran_out_of_registers_for_arguments:
/* if there are more arguments, allocate space for them in
the stack, then push them starting from the ninth one. */
- if ((argno < nargs) || argbytes) {
- int space = 0, jj;
+ if ((argno < nargs) || argbytes)
+ {
+ int space = 0, jj;
- if (argbytes) {
- space += ((len - argbytes + 3) & -4);
- jj = argno + 1;
- }
- else
- jj = argno;
+ if (argbytes)
+ {
+ space += ((len - argbytes + 3) & -4);
+ jj = argno + 1;
+ }
+ else
+ jj = argno;
- for (; jj < nargs; ++jj) {
- value_ptr val = args[jj];
- space += ((TYPE_LENGTH (VALUE_TYPE (val))) + 3) & -4;
- }
+ for (; jj < nargs; ++jj)
+ {
+ value_ptr val = args[jj];
+ space += ((TYPE_LENGTH (VALUE_TYPE (val))) + 3) & -4;
+ }
- /* add location required for the rest of the parameters */
- space = (space + 7) & -8;
- sp -= space;
+ /* add location required for the rest of the parameters */
+ space = (space + 7) & -8;
+ sp -= space;
- /* This is another instance we need to be concerned about securing our
- stack space. If we write anything underneath %sp (r1), we might conflict
- with the kernel who thinks he is free to use this area. So, update %sp
- first before doing anything else. */
+ /* This is another instance we need to be concerned about securing our
+ stack space. If we write anything underneath %sp (r1), we might conflict
+ with the kernel who thinks he is free to use this area. So, update %sp
+ first before doing anything else. */
- write_register (SP_REGNUM, sp);
+ write_register (SP_REGNUM, sp);
- /* if the last argument copied into the registers didn't fit there
- completely, push the rest of it into stack. */
+ /* if the last argument copied into the registers didn't fit there
+ completely, push the rest of it into stack. */
- if (argbytes) {
- write_memory (sp+24+(ii*4),
- ((char*)VALUE_CONTENTS (arg))+argbytes,
- len - argbytes);
- ++argno;
- ii += ((len - argbytes + 3) & -4) / 4;
- }
+ if (argbytes)
+ {
+ write_memory (sp + 24 + (ii * 4),
+ ((char *) VALUE_CONTENTS (arg)) + argbytes,
+ len - argbytes);
+ ++argno;
+ ii += ((len - argbytes + 3) & -4) / 4;
+ }
- /* push the rest of the arguments into stack. */
- for (; argno < nargs; ++argno) {
+ /* push the rest of the arguments into stack. */
+ for (; argno < nargs; ++argno)
+ {
- arg = args[argno];
- type = check_typedef (VALUE_TYPE (arg));
- len = TYPE_LENGTH (type);
+ arg = args[argno];
+ type = check_typedef (VALUE_TYPE (arg));
+ len = TYPE_LENGTH (type);
- /* float types should be passed in fpr's, as well as in the stack. */
- if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13) {
+ /* float types should be passed in fpr's, as well as in the stack. */
+ if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13)
+ {
- if (len > 8)
- printf_unfiltered (
-"Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
+ if (len > 8)
+ printf_unfiltered (
+ "Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
- memcpy (®isters[REGISTER_BYTE(FP0_REGNUM + 1 + f_argno)],
- VALUE_CONTENTS (arg),
- len);
- ++f_argno;
- }
+ memcpy (®isters[REGISTER_BYTE (FP0_REGNUM + 1 + f_argno)],
+ VALUE_CONTENTS (arg),
+ len);
+ ++f_argno;
+ }
- write_memory (sp+24+(ii*4), (char *) VALUE_CONTENTS (arg), len);
- ii += ((len + 3) & -4) / 4;
+ write_memory (sp + 24 + (ii * 4), (char *) VALUE_CONTENTS (arg), len);
+ ii += ((len + 3) & -4) / 4;
+ }
}
- }
else
/* Secure stack areas first, before doing anything else. */
write_register (SP_REGNUM, sp);
if (!USE_GENERIC_DUMMY_FRAMES)
{
/* we want to copy 24 bytes of target's frame to dummy's frame,
- then set back chain to point to new frame. */
-
- saved_sp = dummy_frame_addr [dummy_frame_count - 1];
+ then set back chain to point to new frame. */
+
+ saved_sp = dummy_frame_addr[dummy_frame_count - 1];
read_memory (saved_sp, tmp_buffer, 24);
write_memory (sp, tmp_buffer, 24);
}
/* Function: ppc_push_return_address (pc, sp)
Set up the return address for the inferior function call. */
-CORE_ADDR
+CORE_ADDR
ppc_push_return_address (pc, sp)
CORE_ADDR pc;
CORE_ADDR sp;
{
int offset = 0;
- if (TYPE_CODE (valtype) == TYPE_CODE_FLT) {
+ if (TYPE_CODE (valtype) == TYPE_CODE_FLT)
+ {
+
+ double dd;
+ float ff;
+ /* floats and doubles are returned in fpr1. fpr's have a size of 8 bytes.
+ We need to truncate the return value into float size (4 byte) if
+ necessary. */
- double dd; float ff;
- /* floats and doubles are returned in fpr1. fpr's have a size of 8 bytes.
- We need to truncate the return value into float size (4 byte) if
- necessary. */
+ if (TYPE_LENGTH (valtype) > 4) /* this is a double */
+ memcpy (valbuf,
+ ®buf[REGISTER_BYTE (FP0_REGNUM + 1)],
+ TYPE_LENGTH (valtype));
+ else
+ { /* float */
+ memcpy (&dd, ®buf[REGISTER_BYTE (FP0_REGNUM + 1)], 8);
+ ff = (float) dd;
+ memcpy (valbuf, &ff, sizeof (float));
+ }
+ }
+ else
+ {
+ /* return value is copied starting from r3. */
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN
+ && TYPE_LENGTH (valtype) < REGISTER_RAW_SIZE (3))
+ offset = REGISTER_RAW_SIZE (3) - TYPE_LENGTH (valtype);
- if (TYPE_LENGTH (valtype) > 4) /* this is a double */
- memcpy (valbuf,
- ®buf[REGISTER_BYTE (FP0_REGNUM + 1)],
+ memcpy (valbuf,
+ regbuf + REGISTER_BYTE (3) + offset,
TYPE_LENGTH (valtype));
- else { /* float */
- memcpy (&dd, ®buf[REGISTER_BYTE (FP0_REGNUM + 1)], 8);
- ff = (float)dd;
- memcpy (valbuf, &ff, sizeof(float));
}
- }
- else {
- /* return value is copied starting from r3. */
- if (TARGET_BYTE_ORDER == BIG_ENDIAN
- && TYPE_LENGTH (valtype) < REGISTER_RAW_SIZE (3))
- offset = REGISTER_RAW_SIZE (3) - TYPE_LENGTH (valtype);
-
- memcpy (valbuf,
- regbuf + REGISTER_BYTE (3) + offset,
- TYPE_LENGTH (valtype));
- }
}
register unsigned int ii, op;
CORE_ADDR solib_target_pc;
- static unsigned trampoline_code[] = {
- 0x800b0000, /* l r0,0x0(r11) */
- 0x90410014, /* st r2,0x14(r1) */
- 0x7c0903a6, /* mtctr r0 */
- 0x804b0004, /* l r2,0x4(r11) */
- 0x816b0008, /* l r11,0x8(r11) */
- 0x4e800420, /* bctr */
- 0x4e800020, /* br */
- 0
+ static unsigned trampoline_code[] =
+ {
+ 0x800b0000, /* l r0,0x0(r11) */
+ 0x90410014, /* st r2,0x14(r1) */
+ 0x7c0903a6, /* mtctr r0 */
+ 0x804b0004, /* l r2,0x4(r11) */
+ 0x816b0008, /* l r11,0x8(r11) */
+ 0x4e800420, /* bctr */
+ 0x4e800020, /* br */
+ 0
};
/* If pc is in a shared library trampoline, return its target. */
if (solib_target_pc)
return solib_target_pc;
- for (ii=0; trampoline_code[ii]; ++ii) {
- op = read_memory_integer (pc + (ii*4), 4);
- if (op != trampoline_code [ii])
- return 0;
- }
- ii = read_register (11); /* r11 holds destination addr */
- pc = read_memory_integer (ii, 4); /* (r11) value */
+ for (ii = 0; trampoline_code[ii]; ++ii)
+ {
+ op = read_memory_integer (pc + (ii * 4), 4);
+ if (op != trampoline_code[ii])
+ return 0;
+ }
+ ii = read_register (11); /* r11 holds destination addr */
+ pc = read_memory_integer (ii, 4); /* (r11) value */
return pc;
}
or if the function was interrupted by a signal. */
if (fi->next != NULL && !fi->next->signal_handler_caller)
return 0;
-
+
func_start = get_pc_function_start (fi->pc);
/* If we failed to find the start of the function, it is a mistake
if (!func_start)
{
/* A frame with a zero PC is usually created by dereferencing a NULL
- function pointer, normally causing an immediate core dump of the
- inferior. Mark function as frameless, as the inferior has no chance
- of setting up a stack frame. */
+ function pointer, normally causing an immediate core dump of the
+ inferior. Mark function as frameless, as the inferior has no chance
+ of setting up a stack frame. */
if (fi->pc == 0)
return 1;
else
if (USE_GENERIC_DUMMY_FRAMES)
{
if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame))
- return generic_read_register_dummy(fi->pc, fi->frame, PC_REGNUM);
+ return generic_read_register_dummy (fi->pc, fi->frame, PC_REGNUM);
}
func_start = get_pc_function_start (fi->pc);
struct rs6000_framedata *fdatap;
{
int ii;
- CORE_ADDR frame_addr;
+ CORE_ADDR frame_addr;
struct rs6000_framedata work_fdata;
if (fi->saved_regs)
return;
-
+
if (fdatap == NULL)
{
fdatap = &work_fdata;
frame_addr = fi->prev->frame;
else
frame_addr = read_memory_integer (fi->frame, 4);
-
+
/* if != -1, fdatap->saved_fpr is the smallest number of saved_fpr.
All fpr's from saved_fpr to fp31 are saved. */
int fpr_offset = frame_addr + fdatap->fpr_offset;
for (i = fdatap->saved_fpr; i < 32; i++)
{
- fi->saved_regs [FP0_REGNUM + i] = fpr_offset;
+ fi->saved_regs[FP0_REGNUM + i] = fpr_offset;
fpr_offset += 8;
}
}
int gpr_offset = frame_addr + fdatap->gpr_offset;
for (i = fdatap->saved_gpr; i < 32; i++)
{
- fi->saved_regs [i] = gpr_offset;
+ fi->saved_regs[i] = gpr_offset;
gpr_offset += 4;
}
}
/* If != 0, fdatap->cr_offset is the offset from the frame that holds
the CR. */
if (fdatap->cr_offset != 0)
- fi->saved_regs [CR_REGNUM] = frame_addr + fdatap->cr_offset;
+ fi->saved_regs[CR_REGNUM] = frame_addr + fdatap->cr_offset;
/* If != 0, fdatap->lr_offset is the offset from the frame that holds
the LR. */
if (fdatap->lr_offset != 0)
- fi->saved_regs [LR_REGNUM] = frame_addr + fdatap->lr_offset;
+ fi->saved_regs[LR_REGNUM] = frame_addr + fdatap->lr_offset;
}
/* Return the address of a frame. This is the inital %sp value when the frame
(with the lowest address), the value in alloca register is good. */
if (!fi->next)
- return fi->extra_info->initial_sp = read_register (fdata.alloca_reg);
+ return fi->extra_info->initial_sp = read_register (fdata.alloca_reg);
/* Otherwise, this is a caller frame. Callee has usually already saved
registers, but there are exceptions (such as when the callee
has no parameters). Find the address in which caller's alloca
register is saved. */
- for (callee_fi = fi->next; callee_fi; callee_fi = callee_fi->next) {
+ for (callee_fi = fi->next; callee_fi; callee_fi = callee_fi->next)
+ {
- if (!callee_fi->saved_regs)
- frame_get_saved_regs (callee_fi, NULL);
+ if (!callee_fi->saved_regs)
+ frame_get_saved_regs (callee_fi, NULL);
- /* this is the address in which alloca register is saved. */
+ /* this is the address in which alloca register is saved. */
- tmpaddr = callee_fi->saved_regs [fdata.alloca_reg];
- if (tmpaddr) {
- fi->extra_info->initial_sp = read_memory_integer (tmpaddr, 4);
- return fi->extra_info->initial_sp;
- }
+ tmpaddr = callee_fi->saved_regs[fdata.alloca_reg];
+ if (tmpaddr)
+ {
+ fi->extra_info->initial_sp = read_memory_integer (tmpaddr, 4);
+ return fi->extra_info->initial_sp;
+ }
- /* Go look into deeper levels of the frame chain to see if any one of
- the callees has saved alloca register. */
- }
+ /* Go look into deeper levels of the frame chain to see if any one of
+ the callees has saved alloca register. */
+ }
/* If alloca register was not saved, by the callee (or any of its callees)
then the value in the register is still good. */
return thisframe->frame; /* dummy frame same as caller's frame */
}
- if (inside_entry_file (thisframe->pc) ||
+ if (inside_entry_file (thisframe->pc) ||
thisframe->pc == entry_point_address ())
return 0;
return print_insn_little_powerpc (memaddr, info);
}
#endif
-
\f
+
/* Handling the various PowerPC/RS6000 variants. */
For the 505 and 860 family: eie eid nri
For the 403 and 403GC: icdbdr esr dear evpr cdbcr tsr tcr pit tbhi
- tblo srr2 srr3 dbsr dbcr iac1 iac2 dac1 dac2 dccr iccr pbl1
- pbu1 pbl2 pbu2
+ tblo srr2 srr3 dbsr dbcr iac1 iac2 dac1 dac2 dccr iccr pbl1
+ pbu1 pbl2 pbu2
Most of these register groups aren't anything formal. I arrived at
them by looking at the registers that occurred in more than one
};
char *register_names_403[] =
-{
+{
COMMON_UISA_REG_NAMES,
PPC_UISA_SPR_NAMES,
PPC_SEGMENT_REG_NAMES,
PPC_32_OEA_SPR_NAMES,
- /* 119 */ "icdbdr", "esr", "dear", "evpr", "cdbcr", "tsr", "tcr", "pit",
- /* 127 */ "tbhi", "tblo", "srr2", "srr3", "dbsr", "dbcr", "iac1", "iac2",
+ /* 119 */ "icdbdr", "esr", "dear", "evpr", "cdbcr", "tsr", "tcr", "pit",
+ /* 127 */ "tbhi", "tblo", "srr2", "srr3", "dbsr", "dbcr", "iac1", "iac2",
/* 135 */ "dac1", "dac2", "dccr", "iccr", "pbl1", "pbu1", "pbl2", "pbu2"
};
char *register_names_403GC[] =
-{
+{
COMMON_UISA_REG_NAMES,
PPC_UISA_SPR_NAMES,
PPC_SEGMENT_REG_NAMES,
PPC_32_OEA_SPR_NAMES,
- /* 119 */ "icdbdr", "esr", "dear", "evpr", "cdbcr", "tsr", "tcr", "pit",
- /* 127 */ "tbhi", "tblo", "srr2", "srr3", "dbsr", "dbcr", "iac1", "iac2",
- /* 135 */ "dac1", "dac2", "dccr", "iccr", "pbl1", "pbu1", "pbl2", "pbu2",
+ /* 119 */ "icdbdr", "esr", "dear", "evpr", "cdbcr", "tsr", "tcr", "pit",
+ /* 127 */ "tbhi", "tblo", "srr2", "srr3", "dbsr", "dbcr", "iac1", "iac2",
+ /* 135 */ "dac1", "dac2", "dccr", "iccr", "pbl1", "pbu1", "pbl2", "pbu2",
/* 143 */ "zpr", "pid", "sgr", "dcwr", "tbhu", "tblu"
};
char *register_names_505[] =
-{
+{
COMMON_UISA_REG_NAMES,
PPC_UISA_SPR_NAMES,
PPC_SEGMENT_REG_NAMES,
};
char *register_names_860[] =
-{
+{
COMMON_UISA_REG_NAMES,
PPC_UISA_SPR_NAMES,
PPC_SEGMENT_REG_NAMES,
PPC_32_OEA_SPR_NAMES,
- /* 119 */ "eie", "eid", "nri", "cmpa", "cmpb", "cmpc", "cmpd", "icr",
- /* 127 */ "der", "counta", "countb", "cmpe", "cmpf", "cmpg", "cmph",
- /* 134 */ "lctrl1", "lctrl2", "ictrl", "bar", "ic_cst", "ic_adr", "ic_dat",
- /* 141 */ "dc_cst", "dc_adr", "dc_dat", "dpdr", "dpir", "immr", "mi_ctr",
- /* 148 */ "mi_ap", "mi_epn", "mi_twc", "mi_rpn", "md_ctr", "m_casid",
- /* 154 */ "md_ap", "md_epn", "md_twb", "md_twc", "md_rpn", "m_tw",
- /* 160 */ "mi_dbcam", "mi_dbram0", "mi_dbram1", "md_dbcam", "md_dbram0",
+ /* 119 */ "eie", "eid", "nri", "cmpa", "cmpb", "cmpc", "cmpd", "icr",
+ /* 127 */ "der", "counta", "countb", "cmpe", "cmpf", "cmpg", "cmph",
+ /* 134 */ "lctrl1", "lctrl2", "ictrl", "bar", "ic_cst", "ic_adr", "ic_dat",
+ /* 141 */ "dc_cst", "dc_adr", "dc_dat", "dpdr", "dpir", "immr", "mi_ctr",
+ /* 148 */ "mi_ap", "mi_epn", "mi_twc", "mi_rpn", "md_ctr", "m_casid",
+ /* 154 */ "md_ap", "md_epn", "md_twb", "md_twc", "md_rpn", "m_tw",
+ /* 160 */ "mi_dbcam", "mi_dbram0", "mi_dbram1", "md_dbcam", "md_dbram0",
/* 165 */ "md_dbram1"
};
writing RTCU and RTCL. However, how one reads and writes a
register is the stub's problem. */
char *register_names_601[] =
-{
+{
COMMON_UISA_REG_NAMES,
PPC_UISA_SPR_NAMES,
PPC_SEGMENT_REG_NAMES,
PPC_32_OEA_SPR_NAMES,
- /* 119 */ "hid0", "hid1", "iabr", "dabr", "pir", "mq", "rtcu",
+ /* 119 */ "hid0", "hid1", "iabr", "dabr", "pir", "mq", "rtcu",
/* 126 */ "rtcl"
};
char *register_names_602[] =
-{
+{
COMMON_UISA_REG_NAMES,
PPC_UISA_SPR_NAMES,
PPC_SEGMENT_REG_NAMES,
PPC_32_OEA_SPR_NAMES,
- /* 119 */ "hid0", "hid1", "iabr", "", "", "tcr", "ibr", "esassr", "sebr",
+ /* 119 */ "hid0", "hid1", "iabr", "", "", "tcr", "ibr", "esassr", "sebr",
/* 128 */ "ser", "sp", "lt"
};
char *register_names_603[] =
-{
+{
COMMON_UISA_REG_NAMES,
PPC_UISA_SPR_NAMES,
PPC_SEGMENT_REG_NAMES,
PPC_32_OEA_SPR_NAMES,
- /* 119 */ "hid0", "hid1", "iabr", "", "", "dmiss", "dcmp", "hash1",
+ /* 119 */ "hid0", "hid1", "iabr", "", "", "dmiss", "dcmp", "hash1",
/* 127 */ "hash2", "imiss", "icmp", "rpa"
};
char *register_names_604[] =
-{
+{
COMMON_UISA_REG_NAMES,
PPC_UISA_SPR_NAMES,
PPC_SEGMENT_REG_NAMES,
PPC_32_OEA_SPR_NAMES,
- /* 119 */ "hid0", "hid1", "iabr", "dabr", "pir", "mmcr0", "pmc1", "pmc2",
+ /* 119 */ "hid0", "hid1", "iabr", "dabr", "pir", "mmcr0", "pmc1", "pmc2",
/* 127 */ "sia", "sda"
};
char *register_names_750[] =
-{
+{
COMMON_UISA_REG_NAMES,
PPC_UISA_SPR_NAMES,
PPC_SEGMENT_REG_NAMES,
PPC_32_OEA_SPR_NAMES,
- /* 119 */ "hid0", "hid1", "iabr", "dabr", "", "ummcr0", "upmc1", "upmc2",
- /* 127 */ "usia", "ummcr1", "upmc3", "upmc4", "mmcr0", "pmc1", "pmc2",
- /* 134 */ "sia", "mmcr1", "pmc3", "pmc4", "l2cr", "ictc", "thrm1", "thrm2",
+ /* 119 */ "hid0", "hid1", "iabr", "dabr", "", "ummcr0", "upmc1", "upmc2",
+ /* 127 */ "usia", "ummcr1", "upmc3", "upmc4", "mmcr0", "pmc1", "pmc2",
+ /* 134 */ "sia", "mmcr1", "pmc3", "pmc4", "l2cr", "ictc", "thrm1", "thrm2",
/* 142 */ "thrm3"
};
/* Information about a particular processor variant. */
struct variant
-{
- /* Name of this variant. */
- char *name;
+ {
+ /* Name of this variant. */
+ char *name;
- /* English description of the variant. */
- char *description;
+ /* English description of the variant. */
+ char *description;
- /* Table of register names; registers[R] is the name of the register
- number R. */
- int num_registers;
- char **registers;
-};
+ /* Table of register names; registers[R] is the name of the register
+ number R. */
+ int num_registers;
+ char **registers;
+ };
#define num_registers(list) (sizeof (list) / sizeof((list)[0]))
value as an argument to the --with-cpu flag, in configure.in. */
static struct variant
-variants[] =
+ variants[] =
{
- { "ppc-uisa", "PowerPC UISA - a PPC processor as viewed by user-level code",
- num_registers (register_names_uisa), register_names_uisa },
- { "rs6000", "IBM RS6000 (\"POWER\") architecture, user-level view",
- num_registers (register_names_rs6000), register_names_rs6000 },
- { "403", "IBM PowerPC 403",
- num_registers (register_names_403), register_names_403 },
- { "403GC", "IBM PowerPC 403GC",
- num_registers (register_names_403GC), register_names_403GC },
- { "505", "Motorola PowerPC 505",
- num_registers (register_names_505), register_names_505 },
- { "860", "Motorola PowerPC 860 or 850",
- num_registers (register_names_860), register_names_860 },
- { "601", "Motorola PowerPC 601",
- num_registers (register_names_601), register_names_601 },
- { "602", "Motorola PowerPC 602",
- num_registers (register_names_602), register_names_602 },
- { "603", "Motorola/IBM PowerPC 603 or 603e",
- num_registers (register_names_603), register_names_603 },
- { "604", "Motorola PowerPC 604 or 604e",
- num_registers (register_names_604), register_names_604 },
- { "750", "Motorola/IBM PowerPC 750 or 750",
- num_registers (register_names_750), register_names_750 },
- { 0, 0, 0, 0 }
+ {"ppc-uisa", "PowerPC UISA - a PPC processor as viewed by user-level code",
+ num_registers (register_names_uisa), register_names_uisa},
+ {"rs6000", "IBM RS6000 (\"POWER\") architecture, user-level view",
+ num_registers (register_names_rs6000), register_names_rs6000},
+ {"403", "IBM PowerPC 403",
+ num_registers (register_names_403), register_names_403},
+ {"403GC", "IBM PowerPC 403GC",
+ num_registers (register_names_403GC), register_names_403GC},
+ {"505", "Motorola PowerPC 505",
+ num_registers (register_names_505), register_names_505},
+ {"860", "Motorola PowerPC 860 or 850",
+ num_registers (register_names_860), register_names_860},
+ {"601", "Motorola PowerPC 601",
+ num_registers (register_names_601), register_names_601},
+ {"602", "Motorola PowerPC 602",
+ num_registers (register_names_602), register_names_602},
+ {"603", "Motorola/IBM PowerPC 603 or 603e",
+ num_registers (register_names_603), register_names_603},
+ {"604", "Motorola PowerPC 604 or 604e",
+ num_registers (register_names_604), register_names_604},
+ {"750", "Motorola/IBM PowerPC 750 or 740",
+ num_registers (register_names_750), register_names_750},
+ {0, 0, 0, 0}
};
find_variant_by_name (char *name)
{
int i;
-
+
for (i = 0; variants[i].name; i++)
- if (! strcmp (name, variants[i].name))
+ if (!strcmp (name, variants[i].name))
return &variants[i];
return 0;
{
int i;
- if (! arg || arg[0] == '\0')
+ if (!arg || arg[0] == '\0')
{
list_variants ();
return;
{
error_begin ();
fprintf_filtered (gdb_stderr,
- "`%s' is not a recognized PowerPC / RS6000 variant name.\n\n", arg);
+ "`%s' is not a recognized PowerPC / RS6000 variant name.\n\n", arg);
list_variants ();
return_to_top_level (RETURN_ERROR);
}
{
show_current_variant ();
}
+\f
-\f
/* Initialization code. */
void
projects / deliverable / binutils-gdb.git / blobdiff