/* Target-dependent code for GDB, the GNU debugger.
- Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997
+ Free Software Foundation, Inc.
This file is part of GDB.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "frame.h"
#include "symtab.h"
#include "target.h"
#include "gdbcore.h"
-
+#include "gdbcmd.h"
+#include "symfile.h"
+#include "objfiles.h"
#include "xcoffsolib.h"
-#include <sys/param.h>
-#include <sys/dir.h>
-#include <sys/user.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-
-#include <a.out.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/core.h>
-#include <sys/ldr.h>
-
-
-extern struct obstack frame_cache_obstack;
-
extern int errno;
-/* Nonzero if we just simulated a single step break. */
-int one_stepped;
-
/* Breakpoint shadows for the single step instructions will be kept here. */
static struct sstep_breaks {
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
+ this hook to point to find_toc_address. */
+
+CORE_ADDR (*find_toc_address_hook) PARAMS ((CORE_ADDR)) = NULL;
+
/* Static function prototypes */
-static CORE_ADDR
-find_toc_address PARAMS ((CORE_ADDR pc));
+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_cache_fsr PARAMS ((struct frame_info *fi,
- struct aix_framedata *fdatap));
+static void pop_dummy_frame PARAMS ((void));
+
+static CORE_ADDR frame_initial_stack_address PARAMS ((struct frame_info *));
+
+/* Fill in fi->saved_regs */
+
+struct frame_extra_info
+{
+ /* Functions calling alloca() change the value of the stack
+ pointer. We need to use initial stack pointer (which is saved in
+ 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. */ \
+};
+
+void
+rs6000_init_extra_frame_info (fromleaf, fi)
+ int fromleaf;
+ struct frame_info *fi;
+{
+ 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
+ && fi->pc < TEXT_SEGMENT_BASE)
+ /* We're in get_prev_frame_info */
+ /* and this is a special signal frame. */
+ /* (fi->pc will be some low address in the kernel, */
+ /* to which the signal handler returns). */
+ fi->signal_handler_caller = 1;
+}
+
+
+void
+rs6000_frame_init_saved_regs (fi)
+ struct frame_info *fi;
+{
+ frame_get_saved_regs (fi, NULL);
+}
+
+CORE_ADDR
+rs6000_frame_args_address (fi)
+ struct frame_info *fi;
+{
+ if (fi->extra_info->initial_sp != 0)
+ return fi->extra_info->initial_sp;
+ else
+ return frame_initial_stack_address (fi);
+}
+
+
+/* Calculate the destination of a branch/jump. Return -1 if not a branch. */
-/*
- * Calculate the destination of a branch/jump. Return -1 if not a branch.
- */
static CORE_ADDR
branch_dest (opcode, instr, pc, safety)
int opcode;
CORE_ADDR pc;
CORE_ADDR safety;
{
- register long offset;
CORE_ADDR dest;
int immediate;
int absolute;
switch (opcode) {
case 18 :
immediate = ((instr & ~3) << 6) >> 6; /* br unconditional */
+ if (absolute)
+ dest = immediate;
+ else
+ dest = pc + immediate;
+ break;
case 16 :
- if (opcode != 18) /* br conditional */
- immediate = ((instr & ~3) << 16) >> 16;
+ immediate = ((instr & ~3) << 16) >> 16; /* br conditional */
if (absolute)
dest = immediate;
else
ext_op = (instr>>1) & 0x3ff;
if (ext_op == 16) /* br conditional register */
- dest = read_register (LR_REGNUM) & ~3;
+ {
+ 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 */
{
}
+/* Sequence of bytes for breakpoint instruction. */
+
+#define BIG_BREAKPOINT { 0x7d, 0x82, 0x10, 0x08 }
+#define LITTLE_BREAKPOINT { 0x08, 0x10, 0x82, 0x7d }
+
+unsigned char *
+rs6000_breakpoint_from_pc (bp_addr, bp_size)
+ CORE_ADDR *bp_addr;
+ int *bp_size;
+{
+ static unsigned char big_breakpoint[] = BIG_BREAKPOINT;
+ static unsigned char little_breakpoint[] = LITTLE_BREAKPOINT;
+ *bp_size = 4;
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ return big_breakpoint;
+ else
+ return little_breakpoint;
+}
+
/* AIX does not support PT_STEP. Simulate it. */
void
-single_step (signal)
- int signal;
+rs6000_software_single_step (signal, insert_breakpoints_p)
+ enum target_signal signal;
+ int insert_breakpoints_p;
{
#define INSNLEN(OPCODE) 4
- static char breakp[] = BREAKPOINT;
+ static char le_breakp[] = LITTLE_BREAKPOINT;
+ static char be_breakp[] = BIG_BREAKPOINT;
+ char *breakp = TARGET_BYTE_ORDER == BIG_ENDIAN ? be_breakp : le_breakp;
int ii, insn;
CORE_ADDR loc;
CORE_ADDR breaks[2];
int opcode;
- if (!one_stepped) {
+ if (insert_breakpoints_p) {
+
loc = read_pc ();
- read_memory (loc, (char *) &insn, 4);
+ insn = read_memory_integer (loc, 4);
breaks[0] = loc + INSNLEN(insn);
opcode = insn >> 26;
stepBreaks[ii].address = breaks[ii];
}
- one_stepped = 1;
} else {
/* remove step breakpoints. */
write_memory
(stepBreaks[ii].address, stepBreaks[ii].data, 4);
- one_stepped = 0;
}
errno = 0; /* FIXME, don't ignore errors! */
/* What errors? {read,write}_memory call error(). */
}
-/* return pc value after skipping a function prologue. */
-
-skip_prologue (pc)
-CORE_ADDR pc;
-{
- unsigned int tmp;
- unsigned int op; /* FIXME, assumes instruction size matches host int!!! */
-
- if (target_read_memory (pc, (char *)&op, sizeof (op)))
- return pc; /* Can't access it -- assume no prologue. */
- SWAP_TARGET_AND_HOST (&op, sizeof (op));
-
- /* Assume that subsequent fetches can fail with low probability. */
-
- if (op == 0x7c0802a6) { /* mflr r0 */
- pc += 4;
- op = read_memory_integer (pc, 4);
- }
-
- if ((op & 0xfc00003e) == 0x7c000026) { /* mfcr Rx */
- pc += 4;
- op = read_memory_integer (pc, 4);
- }
-
- if ((op & 0xfc000000) == 0x48000000) { /* bl foo, to save fprs??? */
- pc += 4;
- op = read_memory_integer (pc, 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. */
+/* return pc value after skipping a function prologue and also return
+ information about a function frame.
- if (op == 0x4def7b82 || /* crorc 15, 15, 15 */
- op == 0x0)
- return pc - 4; /* don't skip over this branch */
- }
+ 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
+*/
- if ((op & 0xfc1f0000) == 0xd8010000) { /* stfd Rx,NUM(r1) */
- pc += 4; /* store floating register double */
- op = read_memory_integer (pc, 4);
- }
+#define SIGNED_SHORT(x) \
+ ((sizeof (short) == 2) \
+ ? ((int)(short)(x)) \
+ : ((int)((((x) & 0xffff) ^ 0x8000) - 0x8000)))
- if ((op & 0xfc1f0000) == 0xbc010000) { /* stm Rx, NUM(r1) */
- pc += 4;
- op = read_memory_integer (pc, 4);
- }
+#define GET_SRC_REG(x) (((x) >> 21) & 0x1f)
- while (((tmp = op >> 16) == 0x9001) || /* st r0, NUM(r1) */
- (tmp == 0x9421) || /* stu r1, NUM(r1) */
- (tmp == 0x93e1)) /* st r31,NUM(r1) */
- {
- pc += 4;
- op = read_memory_integer (pc, 4);
- }
+CORE_ADDR
+skip_prologue (pc, fdata)
+ CORE_ADDR pc;
+ struct rs6000_framedata *fdata;
+{
+ CORE_ADDR orig_pc = pc;
+ char buf[4];
+ unsigned long op;
+ long offset = 0;
+ int lr_reg = 0;
+ int cr_reg = 0;
+ int reg;
+ int framep = 0;
+ int minimal_toc_loaded = 0;
+ static struct rs6000_framedata zero_frame;
+
+ *fdata = zero_frame;
+ fdata->saved_gpr = -1;
+ fdata->saved_fpr = -1;
+ fdata->alloca_reg = -1;
+ fdata->frameless = 1;
+ fdata->nosavedpc = 1;
- while ((tmp = (op >> 22)) == 0x20f) { /* l r31, ... or */
- pc += 4; /* l r30, ... */
- op = read_memory_integer (pc, 4);
- }
+ if (target_read_memory (pc, buf, 4))
+ return pc; /* Can't access it -- assume no prologue. */
- /* store parameters into stack */
- while(
- (op & 0xfc1f0000) == 0xd8010000 || /* stfd Rx,NUM(r1) */
- (op & 0xfc1f0000) == 0x90010000 || /* st r?, NUM(r1) */
- (op & 0xfc000000) == 0xfc000000 || /* frsp, fp?, .. */
- (op & 0xd0000000) == 0xd0000000) /* stfs, fp?, .. */
+ /* Assume that subsequent fetches can fail with low probability. */
+ pc -= 4;
+ for (;;)
{
- pc += 4; /* store fpr double */
+ pc += 4;
op = read_memory_integer (pc, 4);
- }
- if (op == 0x603f0000) { /* oril r31, r1, 0x0 */
- pc += 4; /* this happens if r31 is used as */
- op = read_memory_integer (pc, 4); /* frame ptr. (gcc does that) */
+ 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 & 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),
+ rx >= r13 */
+ (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;
+
+ } 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;
- tmp = 0;
- while ((op >> 16) == (0x907f + tmp)) { /* st r3, NUM(r31) */
- pc += 4; /* st r4, NUM(r31), ... */
- op = read_memory_integer (pc, 4);
- tmp += 0x20;
+ } else if (((op & 0xffff0000) == 0x801e0000 || /* lwz 0,NUM(r30), used
+ in V.4 -mrelocatable */
+ 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
+ in V.4 -mminimal-toc */
+ (op & 0xffff0000) == 0x3bde0000) { /* addi 30,30,foo@l */
+ continue;
+
+ } else if ((op & 0xfc000000) == 0x48000000) { /* 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;
+
+ 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
/* I have problems with skipping over __main() that I need to address
* sometime. Previously, I used to use misc_function_vector which
}
#endif /* 0 */
+ fdata->offset = - fdata->offset;
return pc;
}
{
/* stack pointer. */
CORE_ADDR sp;
+ /* Same thing, target byte order. */
+ char sp_targ[4];
/* link register. */
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;
+
int ii;
target_fetch_registers (-1);
sp = read_register(SP_REGNUM);
pc = read_register(PC_REGNUM);
- memcpy (pc_targ, (char *) &pc, 4);
+ store_address (pc_targ, 4, pc);
+
+ skip_prologue (get_pc_function_start (pc), &fdata);
dummy_frame_addr [dummy_frame_count++] = sp;
before writing register values into the new frame, decrement and update
%sp first in order to secure your frame. */
+ /* FIXME: We don't check if the stack really has this much space.
+ 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);
/* gdb relies on the state of current_frame. We'd better update it,
otherwise things like do_registers_info() wouldn't work properly! */
flush_cached_frames ();
- set_current_frame (create_new_frame (sp-DUMMY_FRAME_SIZE, pc));
/* save program counter in link register's space. */
- write_memory (sp+8, pc_targ, 4);
+ write_memory (sp + (fdata.lr_offset ? fdata.lr_offset : DEFAULT_LR_SAVE),
+ pc_targ, 4);
/* save all floating point and general purpose registers here. */
/* 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_SP_REGNUM-FIRST_SP_REGNUM+1); ++ii) {
+ 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);
+ ®isters[REGISTER_BYTE (FPLAST_REGNUM + ii)], 4);
}
/* Save sp or so called back chain right here. */
- write_memory (sp-DUMMY_FRAME_SIZE, &sp, 4);
+ store_address (sp_targ, 4, sp);
+ write_memory (sp-DUMMY_FRAME_SIZE, sp_targ, 4);
sp -= DUMMY_FRAME_SIZE;
/* And finally, this is the back chain. */
GDB process that keeps track of these dummy frames! -- gnu@cygnus.com Aug92
*/
+static void
pop_dummy_frame ()
{
CORE_ADDR sp, pc;
}
/* restore the rest of the registers. */
- for (ii=1; ii <=(LAST_SP_REGNUM-FIRST_SP_REGNUM+1); ++ii)
+ 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);
+ ®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. */
- *(int*)®isters [REGISTER_BYTE(FP_REGNUM)] = sp;
+ memcpy (®isters [REGISTER_BYTE(FP_REGNUM)], (char *) &sp, sizeof (int));
/* Now we can restore all registers. */
target_store_registers (-1);
pc = read_pc ();
flush_cached_frames ();
- set_current_frame (create_new_frame (sp, pc));
}
pop_frame ()
{
CORE_ADDR pc, lr, sp, prev_sp; /* %pc, %lr, %sp */
- struct aix_framedata fdata;
- FRAME fr = get_current_frame ();
+ struct rs6000_framedata fdata;
+ struct frame_info *frame = get_current_frame ();
int addr, ii;
pc = read_pc ();
- sp = FRAME_FP (fr);
+ sp = FRAME_FP (frame);
- if (stop_stack_dummy && dummy_frame_count) {
- pop_dummy_frame ();
- return;
- }
+ if (stop_stack_dummy)
+ {
+#ifdef USE_GENERIC_DUMMY_FRAMES
+ generic_pop_dummy_frame ();
+ flush_cached_frames ();
+ return;
+#else
+ if (dummy_frame_count)
+ pop_dummy_frame ();
+ return;
+#endif
+ }
+
+ /* Make sure that all registers are valid. */
+ read_register_bytes (0, NULL, REGISTER_BYTES);
/* figure out previous %pc value. If the function is frameless, it is
still in the link register, otherwise walk the frames and retrieve the
saved %pc value in the previous frame. */
- addr = get_pc_function_start (fr->pc) + FUNCTION_START_OFFSET;
- function_frame_info (addr, &fdata);
+ addr = get_pc_function_start (frame->pc);
+ (void) skip_prologue (addr, &fdata);
- prev_sp = read_memory_integer (sp, 4);
if (fdata.frameless)
+ prev_sp = sp;
+ else
+ prev_sp = read_memory_integer (sp, 4);
+ if (fdata.lr_offset == 0)
lr = read_register (LR_REGNUM);
else
- lr = read_memory_integer (prev_sp+8, 4);
+ lr = read_memory_integer (prev_sp + fdata.lr_offset, 4);
/* reset %pc value. */
write_register (PC_REGNUM, lr);
/* reset register values if any was saved earlier. */
- addr = prev_sp - fdata.offset;
if (fdata.saved_gpr != -1)
- for (ii=fdata.saved_gpr; ii <= 31; ++ii) {
- read_memory (addr, ®isters [REGISTER_BYTE (ii)], 4);
- addr += 4;
+ {
+ addr = prev_sp + fdata.gpr_offset;
+ for (ii = fdata.saved_gpr; ii <= 31; ++ii) {
+ read_memory (addr, ®isters [REGISTER_BYTE (ii)], 4);
+ addr += 4;
+ }
}
if (fdata.saved_fpr != -1)
- for (ii=fdata.saved_fpr; ii <= 31; ++ii) {
- read_memory (addr, ®isters [REGISTER_BYTE (ii+FP0_REGNUM)], 8);
- addr += 8;
- }
+ {
+ 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;
+ }
+ }
write_register (SP_REGNUM, prev_sp);
target_store_registers (-1);
flush_cached_frames ();
- set_current_frame (create_new_frame (prev_sp, lr));
}
-
/* fixup the call sequence of a dummy function, with the real function address.
its argumets will be passed by gdb. */
void
-fix_call_dummy(dummyname, pc, fun, nargs, type)
- char *dummyname;
- CORE_ADDR pc;
- CORE_ADDR fun;
- int nargs; /* not used */
- int type; /* not used */
+rs6000_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
+ char *dummyname;
+ CORE_ADDR pc;
+ CORE_ADDR fun;
+ int nargs;
+ value_ptr *args;
+ struct type *type;
+ int gcc_p;
{
#define TOC_ADDR_OFFSET 20
#define TARGET_ADDR_OFFSET 28
int ii;
CORE_ADDR target_addr;
- CORE_ADDR tocvalue;
- target_addr = fun;
- tocvalue = find_toc_address (target_addr);
+ if (find_toc_address_hook != NULL)
+ {
+ CORE_ADDR tocvalue;
- ii = *(int*)((char*)dummyname + TOC_ADDR_OFFSET);
- ii = (ii & 0xffff0000) | (tocvalue >> 16);
- *(int*)((char*)dummyname + TOC_ADDR_OFFSET) = ii;
+ tocvalue = (*find_toc_address_hook) (fun);
+ ii = *(int*)((char*)dummyname + TOC_ADDR_OFFSET);
+ ii = (ii & 0xffff0000) | (tocvalue >> 16);
+ *(int*)((char*)dummyname + TOC_ADDR_OFFSET) = ii;
- ii = *(int*)((char*)dummyname + TOC_ADDR_OFFSET+4);
- ii = (ii & 0xffff0000) | (tocvalue & 0x0000ffff);
- *(int*)((char*)dummyname + TOC_ADDR_OFFSET+4) = ii;
+ ii = *(int*)((char*)dummyname + TOC_ADDR_OFFSET+4);
+ ii = (ii & 0xffff0000) | (tocvalue & 0x0000ffff);
+ *(int*)((char*)dummyname + TOC_ADDR_OFFSET+4) = ii;
+ }
+ target_addr = fun;
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+4) = ii;
}
-
-/* return information about a function frame.
- in struct aix_frameinfo 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 number of bytes used in the frame to save registers.
- - 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.
- */
-void
-function_frame_info (pc, fdata)
- CORE_ADDR pc;
- struct aix_framedata *fdata;
-{
- unsigned int tmp;
- register unsigned int op;
-
- fdata->offset = 0;
- fdata->saved_gpr = fdata->saved_fpr = fdata->alloca_reg = -1;
- fdata->frameless = 1;
-
- op = read_memory_integer (pc, 4);
- if (op == 0x7c0802a6) { /* mflr r0 */
- pc += 4;
- op = read_memory_integer (pc, 4);
- fdata->nosavedpc = 0;
- fdata->frameless = 0;
- }
- else /* else, pc is not saved */
- fdata->nosavedpc = 1;
-
- if ((op & 0xfc00003e) == 0x7c000026) { /* mfcr Rx */
- pc += 4;
- op = read_memory_integer (pc, 4);
- fdata->frameless = 0;
- }
-
- if ((op & 0xfc000000) == 0x48000000) { /* bl foo, to save fprs??? */
- pc += 4;
- op = read_memory_integer (pc, 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 || /* crorc 15, 15, 15 */
- op == 0x0)
- return; /* prologue is over */
- fdata->frameless = 0;
- }
-
- if ((op & 0xfc1f0000) == 0xd8010000) { /* stfd Rx,NUM(r1) */
- pc += 4; /* store floating register double */
- op = read_memory_integer (pc, 4);
- fdata->frameless = 0;
- }
-
- if ((op & 0xfc1f0000) == 0xbc010000) { /* stm Rx, NUM(r1) */
- int tmp2;
- fdata->saved_gpr = (op >> 21) & 0x1f;
- tmp2 = op & 0xffff;
- if (tmp2 > 0x7fff)
- tmp2 = (~0 &~ 0xffff) | tmp2;
-
- if (tmp2 < 0) {
- tmp2 = tmp2 * -1;
- fdata->saved_fpr = (tmp2 - ((32 - fdata->saved_gpr) * 4)) / 8;
- if ( fdata->saved_fpr > 0)
- fdata->saved_fpr = 32 - fdata->saved_fpr;
- else
- fdata->saved_fpr = -1;
- }
- fdata->offset = tmp2;
- pc += 4;
- op = read_memory_integer (pc, 4);
- fdata->frameless = 0;
- }
-
- while (((tmp = op >> 16) == 0x9001) || /* st r0, NUM(r1) */
- (tmp == 0x9421) || /* stu r1, NUM(r1) */
- (tmp == 0x93e1)) /* st r31, NUM(r1) */
- {
- int tmp2;
-
- /* gcc takes a short cut and uses this instruction to save r31 only. */
-
- if (tmp == 0x93e1) {
- if (fdata->offset)
-/* fatal ("Unrecognized prolog."); */
- printf ("Unrecognized prolog!\n");
-
- fdata->saved_gpr = 31;
- tmp2 = op & 0xffff;
- if (tmp2 > 0x7fff) {
- tmp2 = - ((~0 &~ 0xffff) | tmp2);
- fdata->saved_fpr = (tmp2 - ((32 - 31) * 4)) / 8;
- if ( fdata->saved_fpr > 0)
- fdata->saved_fpr = 32 - fdata->saved_fpr;
- else
- fdata->saved_fpr = -1;
- }
- fdata->offset = tmp2;
- }
- pc += 4;
- op = read_memory_integer (pc, 4);
- fdata->frameless = 0;
- }
-
- while ((tmp = (op >> 22)) == 0x20f) { /* l r31, ... or */
- pc += 4; /* l r30, ... */
- op = read_memory_integer (pc, 4);
- fdata->frameless = 0;
- }
-
- /* store parameters into stack */
- while(
- (op & 0xfc1f0000) == 0xd8010000 || /* stfd Rx,NUM(r1) */
- (op & 0xfc1f0000) == 0x90010000 || /* st r?, NUM(r1) */
- (op & 0xfc000000) == 0xfc000000 || /* frsp, fp?, .. */
- (op & 0xd0000000) == 0xd0000000) /* stfs, fp?, .. */
- {
- pc += 4; /* store fpr double */
- op = read_memory_integer (pc, 4);
- fdata->frameless = 0;
- }
-
- if (op == 0x603f0000) { /* oril r31, r1, 0x0 */
- fdata->alloca_reg = 31;
- fdata->frameless = 0;
- }
-}
-
-
-/* Pass the arguments in either registers, or in the stack. In RS6000, the first
- eight words of the argument list (that might be less than eight parameters if
- some parameters occupy more than one word) are passed in r3..r11 registers.
- float and double parameters are passed in fpr's, in addition to that. Rest of
- the parameters if any are passed in user stack. There might be cases in which
- half of the parameter is copied into registers, the other half is pushed into
+/* Pass the arguments in either registers, or in the stack. In RS6000,
+ the first eight words of the argument list (that might be less than
+ eight parameters if some parameters occupy more than one word) are
+ passed in r3..r11 registers. float and double parameters are
+ passed in fpr's, in addition to that. Rest of the parameters if any
+ are passed in user stack. There might be cases in which half of the
+ parameter is copied into registers, the other half is pushed into
stack.
If the function is returning a structure, then the return address is passed
- in r3, then the first 7 words of the parametes can be passed in registers,
+ in r3, then the first 7 words of the parameters can be passed in registers,
starting from r4. */
CORE_ADDR
push_arguments (nargs, args, sp, struct_return, struct_addr)
- int nargs;
- value *args;
- CORE_ADDR sp;
- int struct_return;
- CORE_ADDR struct_addr;
+ int nargs;
+ value_ptr *args;
+ CORE_ADDR sp;
+ int struct_return;
+ CORE_ADDR struct_addr;
{
- int ii, len;
+ int ii;
+ int len = 0;
int argno; /* current argument number */
int argbytes; /* current argument byte */
char tmp_buffer [50];
- value arg;
int f_argno = 0; /* current floating point argno */
- CORE_ADDR saved_sp, pc;
+ value_ptr arg = 0;
+ struct type *type;
+ CORE_ADDR saved_sp;
+
+#ifndef USE_GENERIC_DUMMY_FRAMES
if ( dummy_frame_count <= 0)
- printf ("FATAL ERROR -push_arguments()! frame not found!!\n");
+ printf_unfiltered ("FATAL ERROR -push_arguments()! frame not found!!\n");
+#endif /* GENERIC_DUMMY_FRAMES */
/* The first eight words of ther arguments are passed in registers. Copy
them appropriately.
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 = value_arg_coerce (args[argno]);
- len = TYPE_LENGTH (VALUE_TYPE (arg));
+ arg = args[argno];
+ type = check_typedef (VALUE_TYPE (arg));
+ len = TYPE_LENGTH (type);
- if (TYPE_CODE (VALUE_TYPE (arg)) == TYPE_CODE_FLT) {
+ 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 (
+ printf_unfiltered (
"Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
- bcopy (VALUE_CONTENTS (arg),
- ®isters[REGISTER_BYTE(FP0_REGNUM + 1 + f_argno)], len);
+ memcpy (®isters[REGISTER_BYTE(FP0_REGNUM + 1 + f_argno)],
+ VALUE_CONTENTS (arg),
+ len);
++f_argno;
}
/* Argument takes more than one register. */
while (argbytes < len) {
-
- *(int*)®isters[REGISTER_BYTE(ii+3)] = 0;
- bcopy ( ((char*)VALUE_CONTENTS (arg))+argbytes,
- ®isters[REGISTER_BYTE(ii+3)],
- (len - argbytes) > 4 ? 4 : len - argbytes);
+ 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)
--ii;
}
else { /* Argument can fit in one register. No problem. */
- *(int*)®isters[REGISTER_BYTE(ii+3)] = 0;
- bcopy (VALUE_CONTENTS (arg), ®isters[REGISTER_BYTE(ii+3)], len);
+ memset (®isters[REGISTER_BYTE(ii+3)], 0, sizeof(int));
+ memcpy (®isters[REGISTER_BYTE(ii+3)], VALUE_CONTENTS (arg), len);
}
++argno;
}
ran_out_of_registers_for_arguments:
+#ifdef USE_GENERIC_DUMMY_FRAMES
+ saved_sp = read_sp ();
+#else
/* location for 8 parameters are always reserved. */
sp -= 4 * 8;
/* another six words for back chain, TOC register, link register, etc. */
sp -= 24;
-
+#endif /* GENERIC_DUMMY_FRAMES */
/* 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;
- value val;
if (argbytes) {
space += ((len - argbytes + 3) & -4);
jj = argno;
for (; jj < nargs; ++jj) {
- val = value_arg_coerce (args[jj]);
+ value_ptr val = args[jj];
space += ((TYPE_LENGTH (VALUE_TYPE (val))) + 3) & -4;
}
completely, push the rest of it into stack. */
if (argbytes) {
- write_memory (
- sp+24+(ii*4), ((char*)VALUE_CONTENTS (arg))+argbytes, len - 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) {
- arg = value_arg_coerce (args[argno]);
- len = TYPE_LENGTH (VALUE_TYPE (arg));
+ 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 (VALUE_TYPE (arg)) == TYPE_CODE_FLT && f_argno < 13) {
+ if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13) {
if (len > 8)
- printf (
+ printf_unfiltered (
"Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
- bcopy (VALUE_CONTENTS (arg),
- ®isters[REGISTER_BYTE(FP0_REGNUM + 1 + f_argno)], len);
+ memcpy (®isters[REGISTER_BYTE(FP0_REGNUM + 1 + f_argno)],
+ VALUE_CONTENTS (arg),
+ len);
++f_argno;
}
/* Secure stack areas first, before doing anything else. */
write_register (SP_REGNUM, sp);
+#ifndef 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];
read_memory (saved_sp, tmp_buffer, 24);
write_memory (sp, tmp_buffer, 24);
+#endif /* GENERIC_DUMMY_FRAMES */
- write_memory (sp, &saved_sp, 4); /* set back chain properly */
+ /* set back chain properly */
+ store_address (tmp_buffer, 4, saved_sp);
+ write_memory (sp, tmp_buffer, 4);
target_store_registers (-1);
return sp;
}
+#ifdef ELF_OBJECT_FORMAT
+
+/* Function: ppc_push_return_address (pc, sp)
+ Set up the return address for the inferior function call. */
+
+CORE_ADDR
+ppc_push_return_address (pc, sp)
+ CORE_ADDR pc;
+ CORE_ADDR sp;
+{
+ write_register (LR_REGNUM, CALL_DUMMY_ADDRESS ());
+ return sp;
+}
+
+#endif
/* a given return value in `regbuf' with a type `valtype', extract and copy its
value into `valbuf' */
void
extract_return_value (valtype, regbuf, valbuf)
- struct type *valtype;
- char regbuf[REGISTER_BYTES];
- char *valbuf;
+ struct type *valtype;
+ char regbuf[REGISTER_BYTES];
+ char *valbuf;
{
+ int offset = 0;
if (TYPE_CODE (valtype) == TYPE_CODE_FLT) {
necessary. */
if (TYPE_LENGTH (valtype) > 4) /* this is a double */
- bcopy (®buf[REGISTER_BYTE (FP0_REGNUM + 1)], valbuf,
- TYPE_LENGTH (valtype));
+ memcpy (valbuf,
+ ®buf[REGISTER_BYTE (FP0_REGNUM + 1)],
+ TYPE_LENGTH (valtype));
else { /* float */
- bcopy (®buf[REGISTER_BYTE (FP0_REGNUM + 1)], &dd, 8);
+ memcpy (&dd, ®buf[REGISTER_BYTE (FP0_REGNUM + 1)], 8);
ff = (float)dd;
- bcopy (&ff, valbuf, sizeof(float));
+ memcpy (valbuf, &ff, sizeof(float));
}
}
- else
+ else {
/* return value is copied starting from r3. */
- bcopy (®buf[REGISTER_BYTE (3)], valbuf, TYPE_LENGTH (valtype));
+ 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));
+ }
}
/* Indirect function calls use a piece of trampoline code to do context
switching, i.e. to set the new TOC table. Skip such code if we are on
its first instruction (as when we have single-stepped to here).
+ Also skip shared library trampoline code (which is different from
+ indirect function call trampolines).
Result is desired PC to step until, or NULL if we are not in
trampoline code. */
CORE_ADDR
skip_trampoline_code (pc)
-CORE_ADDR pc;
+ CORE_ADDR pc;
{
register unsigned int ii, op;
+ CORE_ADDR solib_target_pc;
static unsigned trampoline_code[] = {
0x800b0000, /* l r0,0x0(r11) */
0
};
+ /* If pc is in a shared library trampoline, return its target. */
+ solib_target_pc = find_solib_trampoline_target (pc);
+ 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 pc;
}
-
-/* Determines whether the function FI has a frame on the stack or not.
- Called from the FRAMELESS_FUNCTION_INVOCATION macro in tm.h with a
- second argument of 0, and from the FRAME_SAVED_PC macro with a
- second argument of 1. */
+/* Determines whether the function FI has a frame on the stack or not. */
int
-frameless_function_invocation (fi, pcsaved)
-struct frame_info *fi;
-int pcsaved;
+frameless_function_invocation (fi)
+ struct frame_info *fi;
{
CORE_ADDR func_start;
- struct aix_framedata fdata;
+ struct rs6000_framedata fdata;
- if (fi->next != NULL)
- /* Don't even think about framelessness except on the innermost frame. */
+ /* Don't even think about framelessness except on the innermost frame
+ 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) + FUNCTION_START_OFFSET;
+ func_start = get_pc_function_start (fi->pc);
/* If we failed to find the start of the function, it is a mistake
to inspect the instructions. */
if (!func_start)
- return 0;
+ {
+ /* 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. */
+ if (fi->pc == 0)
+ return 1;
+ else
+ return 0;
+ }
- function_frame_info (func_start, &fdata);
- return pcsaved ? fdata.nosavedpc : fdata.frameless;
+ (void) skip_prologue (func_start, &fdata);
+ return fdata.frameless;
}
+/* Return the PC saved in a frame */
+
+unsigned long
+frame_saved_pc (fi)
+ struct frame_info *fi;
+{
+ CORE_ADDR func_start;
+ struct rs6000_framedata fdata;
+
+ if (fi->signal_handler_caller)
+ return read_memory_integer (fi->frame + SIG_FRAME_PC_OFFSET, 4);
+
+#ifdef 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);
+#endif /* GENERIC_DUMMY_FRAMES */
+
+ func_start = get_pc_function_start (fi->pc);
+
+ /* If we failed to find the start of the function, it is a mistake
+ to inspect the instructions. */
+ if (!func_start)
+ return 0;
+
+ (void) skip_prologue (func_start, &fdata);
+
+ if (fdata.lr_offset == 0 && fi->next != NULL)
+ {
+ if (fi->next->signal_handler_caller)
+ return read_memory_integer (fi->next->frame + SIG_FRAME_LR_OFFSET, 4);
+ else
+ return read_memory_integer (rs6000_frame_chain (fi) + DEFAULT_LR_SAVE,
+ 4);
+ }
+
+ if (fdata.lr_offset == 0)
+ return read_register (LR_REGNUM);
+
+ return read_memory_integer (rs6000_frame_chain (fi) + fdata.lr_offset, 4);
+}
/* If saved registers of frame FI are not known yet, read and cache them.
- &FDATAP contains aix_framedata; TDATAP can be NULL,
+ &FDATAP contains rs6000_framedata; TDATAP can be NULL,
in which case the framedata are read. */
static void
-frame_get_cache_fsr (fi, fdatap)
+frame_get_saved_regs (fi, fdatap)
struct frame_info *fi;
- struct aix_framedata *fdatap;
+ struct rs6000_framedata *fdatap;
{
int ii;
CORE_ADDR frame_addr;
- struct aix_framedata work_fdata;
+ struct rs6000_framedata work_fdata;
- if (fi->cache_fsr)
+ if (fi->saved_regs)
return;
- if (fdatap == NULL) {
- fdatap = &work_fdata;
- function_frame_info (get_pc_function_start (fi->pc), fdatap);
- }
+ if (fdatap == NULL)
+ {
+ fdatap = &work_fdata;
+ (void) skip_prologue (get_pc_function_start (fi->pc), fdatap);
+ }
- fi->cache_fsr = (struct frame_saved_regs *)
- obstack_alloc (&frame_cache_obstack, sizeof (struct frame_saved_regs));
- bzero (fi->cache_fsr, sizeof (struct frame_saved_regs));
+ frame_saved_regs_zalloc (fi);
- if (fi->prev && fi->prev->frame)
+ /* If there were any saved registers, figure out parent's stack
+ pointer. */
+ /* The following is true only if the frame doesn't have a call to
+ alloca(), FIXME. */
+
+ if (fdatap->saved_fpr == 0 && fdatap->saved_gpr == 0
+ && fdatap->lr_offset == 0 && fdatap->cr_offset == 0)
+ frame_addr = 0;
+ else if (fi->prev && fi->prev->frame)
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 right underneath caller
- stack pointer, starting from fp31 first. */
+ All fpr's from saved_fpr to fp31 are saved. */
- if (fdatap->saved_fpr >= 0) {
- for (ii=31; ii >= fdatap->saved_fpr; --ii)
- fi->cache_fsr->regs [FP0_REGNUM + ii] = frame_addr - ((32 - ii) * 8);
- frame_addr -= (32 - fdatap->saved_fpr) * 8;
- }
+ if (fdatap->saved_fpr >= 0)
+ {
+ int i;
+ int fpr_offset = frame_addr + fdatap->fpr_offset;
+ for (i = fdatap->saved_fpr; i < 32; i++)
+ {
+ fi->saved_regs [FP0_REGNUM + i] = fpr_offset;
+ fpr_offset += 8;
+ }
+ }
/* if != -1, fdatap->saved_gpr is the smallest number of saved_gpr.
- All gpr's from saved_gpr to gpr31 are saved right under saved fprs,
- starting from r31 first. */
-
+ All gpr's from saved_gpr to gpr31 are saved. */
+
if (fdatap->saved_gpr >= 0)
- for (ii=31; ii >= fdatap->saved_gpr; --ii)
- fi->cache_fsr->regs [ii] = frame_addr - ((32 - ii) * 4);
+ {
+ int i;
+ int gpr_offset = frame_addr + fdatap->gpr_offset;
+ for (i = fdatap->saved_gpr; i < 32; i++)
+ {
+ 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;
+
+ /* 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;
}
/* Return the address of a frame. This is the inital %sp value when the frame
was first allocated. For functions calling alloca(), it might be saved in
an alloca register. */
-CORE_ADDR
+static CORE_ADDR
frame_initial_stack_address (fi)
struct frame_info *fi;
{
CORE_ADDR tmpaddr;
- struct aix_framedata fdata;
+ struct rs6000_framedata fdata;
struct frame_info *callee_fi;
/* if the initial stack pointer (frame address) of this frame is known,
just return it. */
- if (fi->initial_sp)
- return fi->initial_sp;
+ if (fi->extra_info->initial_sp)
+ return fi->extra_info->initial_sp;
/* find out if this function is using an alloca register.. */
- function_frame_info (get_pc_function_start (fi->pc), &fdata);
+ (void) skip_prologue (get_pc_function_start (fi->pc), &fdata);
/* if saved registers of this frame are not known yet, read and cache them. */
- if (!fi->cache_fsr)
- frame_get_cache_fsr (fi, &fdata);
+ if (!fi->saved_regs)
+ frame_get_saved_regs (fi, &fdata);
/* If no alloca register used, then fi->frame is the value of the %sp for
this frame, and it is good enough. */
- if (fdata.alloca_reg < 0) {
- fi->initial_sp = fi->frame;
- return fi->initial_sp;
- }
+ if (fdata.alloca_reg < 0)
+ {
+ fi->extra_info->initial_sp = fi->frame;
+ return fi->extra_info->initial_sp;
+ }
/* This function has an alloca register. If this is the top-most frame
(with the lowest address), the value in alloca register is good. */
if (!fi->next)
- return fi->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
for (callee_fi = fi->next; callee_fi; callee_fi = callee_fi->next) {
- if (!callee_fi->cache_fsr)
- frame_get_cache_fsr (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. */
- tmpaddr = callee_fi->cache_fsr->regs [fdata.alloca_reg];
+ tmpaddr = callee_fi->saved_regs [fdata.alloca_reg];
if (tmpaddr) {
- fi->initial_sp = read_memory_integer (tmpaddr, 4);
- return fi->initial_sp;
+ 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
/* If alloca register was not saved, by the callee (or any of its callees)
then the value in the register is still good. */
- return fi->initial_sp = read_register (fdata.alloca_reg);
+ fi->extra_info->initial_sp = read_register (fdata.alloca_reg);
+ return fi->extra_info->initial_sp;
}
-FRAME_ADDR
+CORE_ADDR
rs6000_frame_chain (thisframe)
struct frame_info *thisframe;
{
- FRAME_ADDR fp;
- if (inside_entry_file ((thisframe)->pc))
+ CORE_ADDR fp;
+
+#ifdef USE_GENERIC_DUMMY_FRAMES
+ if (PC_IN_CALL_DUMMY (thisframe->pc, thisframe->frame, thisframe->frame))
+ return thisframe->frame; /* dummy frame same as caller's frame */
+#endif /* GENERIC_DUMMY_FRAMES */
+
+ if (inside_entry_file (thisframe->pc) ||
+ thisframe->pc == entry_point_address ())
return 0;
+
if (thisframe->signal_handler_caller)
- {
- /* This was determined by experimentation on AIX 3.2. Perhaps
- it corresponds to some offset in /usr/include/sys/user.h or
- something like that. Using some system include file would
- have the advantage of probably being more robust in the face
- of OS upgrades, but the disadvantage of being wrong for
- cross-debugging. */
-
-#define SIG_FRAME_FP_OFFSET 284
- fp = read_memory_integer (thisframe->frame + SIG_FRAME_FP_OFFSET, 4);
- }
+ fp = read_memory_integer (thisframe->frame + SIG_FRAME_FP_OFFSET, 4);
+ else if (thisframe->next != NULL
+ && thisframe->next->signal_handler_caller
+ && frameless_function_invocation (thisframe))
+ /* A frameless function interrupted by a signal did not change the
+ frame pointer. */
+ fp = FRAME_FP (thisframe);
else
fp = read_memory_integer ((thisframe)->frame, 4);
+#ifdef USE_GENERIC_DUMMY_FRAMES
+ {
+ CORE_ADDR fpp, lr;
+
+ lr = read_register (LR_REGNUM);
+ if (lr == entry_point_address ())
+ if (fp != 0 && (fpp = read_memory_integer (fp, 4)) != 0)
+ if (PC_IN_CALL_DUMMY (lr, fpp, fpp))
+ return fpp;
+ }
+#endif /* GENERIC_DUMMY_FRAMES */
return fp;
}
+\f
+/* Return nonzero if ADDR (a function pointer) is in the data space and
+ is therefore a special function pointer. */
+
+int
+is_magic_function_pointer (addr)
+ CORE_ADDR addr;
+{
+ struct obj_section *s;
+
+ s = find_pc_section (addr);
+ if (s && s->the_bfd_section->flags & SEC_CODE)
+ return 0;
+ else
+ return 1;
+}
+
+#ifdef GDB_TARGET_POWERPC
+int
+gdb_print_insn_powerpc (memaddr, info)
+ bfd_vma memaddr;
+ disassemble_info *info;
+{
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ return print_insn_big_powerpc (memaddr, info);
+ else
+ return print_insn_little_powerpc (memaddr, info);
+}
+#endif
+
+/* Function: get_saved_register
+ Just call the generic_get_saved_register function. */
+
+#ifdef USE_GENERIC_DUMMY_FRAMES
+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);
+}
+#endif
+
\f
-/* xcoff_relocate_symtab - hook for symbol table relocation.
- also reads shared libraries.. */
+/* Handling the various PowerPC/RS6000 variants. */
+
+
+/* The arrays here called register_names_MUMBLE hold names that
+ the rs6000_register_name function returns.
+
+ For each family of PPC variants, I've tried to isolate out the
+ common registers and put them up front, so that as long as you get
+ the general family right, GDB will correctly identify the registers
+ common to that family. The common register sets are:
+
+ For the 60x family: hid0 hid1 iabr dabr pir
+
+ 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
+
+ Most of these register groups aren't anything formal. I arrived at
+ them by looking at the registers that occurred in more than one
+ processor. */
+
+/* UISA register names common across all architectures, including POWER. */
+
+#define COMMON_UISA_REG_NAMES \
+ /* 0 */ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
+ /* 8 */ "r8", "r9", "r10","r11","r12","r13","r14","r15", \
+ /* 16 */ "r16","r17","r18","r19","r20","r21","r22","r23", \
+ /* 24 */ "r24","r25","r26","r27","r28","r29","r30","r31", \
+ /* 32 */ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
+ /* 40 */ "f8", "f9", "f10","f11","f12","f13","f14","f15", \
+ /* 48 */ "f16","f17","f18","f19","f20","f21","f22","f23", \
+ /* 56 */ "f24","f25","f26","f27","f28","f29","f30","f31", \
+ /* 64 */ "pc", "ps"
+
+/* UISA-level SPR names for PowerPC. */
+#define PPC_UISA_SPR_NAMES \
+ /* 66 */ "cr", "lr", "ctr", "xer", ""
+
+/* Segment register names, for PowerPC. */
+#define PPC_SEGMENT_REG_NAMES \
+ /* 71 */ "sr0", "sr1", "sr2", "sr3", "sr4", "sr5", "sr6", "sr7", \
+ /* 79 */ "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15"
+
+/* OEA SPR names for 32-bit PowerPC implementations.
+ The blank space is for "asr", which is only present on 64-bit
+ implementations. */
+#define PPC_32_OEA_SPR_NAMES \
+ /* 87 */ "pvr", \
+ /* 88 */ "ibat0u", "ibat0l", "ibat1u", "ibat1l", \
+ /* 92 */ "ibat2u", "ibat2l", "ibat3u", "ibat3l", \
+ /* 96 */ "dbat0u", "dbat0l", "dbat1u", "dbat1l", \
+ /* 100 */ "dbat2u", "dbat2l", "dbat3u", "dbat3l", \
+ /* 104 */ "sdr1", "", "dar", "dsisr", "sprg0", "sprg1", "sprg2", "sprg3",\
+ /* 112 */ "srr0", "srr1", "tbl", "tbu", "dec", "dabr", "ear"
+
+/* For the RS6000, we only cover user-level SPR's. */
+char *register_names_rs6000[] =
+{
+ COMMON_UISA_REG_NAMES,
+ /* 66 */ "cnd", "lr", "cnt", "xer", "mq"
+};
-xcoff_relocate_symtab (pid)
-unsigned int pid;
+/* a UISA-only view of the PowerPC. */
+char *register_names_uisa[] =
{
-#define MAX_LOAD_SEGS 64 /* maximum number of load segments */
+ COMMON_UISA_REG_NAMES,
+ PPC_UISA_SPR_NAMES
+};
- struct ld_info *ldi;
- int temp;
+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",
+ /* 135 */ "dac1", "dac2", "dccr", "iccr", "pbl1", "pbu1", "pbl2", "pbu2"
+};
- ldi = (void *) alloca(MAX_LOAD_SEGS * sizeof (*ldi));
+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",
+ /* 143 */ "zpr", "pid", "sgr", "dcwr", "tbhu", "tblu"
+};
- /* According to my humble theory, AIX has some timing problems and
- when the user stack grows, kernel doesn't update stack info in time
- and ptrace calls step on user stack. That is why we sleep here a little,
- and give kernel to update its internals. */
+char *register_names_505[] =
+{
+ COMMON_UISA_REG_NAMES,
+ PPC_UISA_SPR_NAMES,
+ PPC_SEGMENT_REG_NAMES,
+ PPC_32_OEA_SPR_NAMES,
+ /* 119 */ "eie", "eid", "nri"
+};
- usleep (36000);
+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",
+ /* 165 */ "md_dbram1"
+};
- errno = 0;
- ptrace(PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi,
- MAX_LOAD_SEGS * sizeof(*ldi), ldi);
- if (errno) {
- perror_with_name ("ptrace ldinfo");
- return 0;
- }
+/* Note that the 601 has different register numbers for reading and
+ 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",
+ /* 126 */ "rtcl"
+};
- vmap_ldinfo(ldi);
+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",
+ /* 128 */ "ser", "sp", "lt"
+};
- do {
- /* We are allowed to assume CORE_ADDR == pointer. This code is
- native only. */
- add_text_to_loadinfo ((CORE_ADDR) ldi->ldinfo_textorg,
- (CORE_ADDR) ldi->ldinfo_dataorg);
- } while (ldi->ldinfo_next
- && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi)));
+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",
+ /* 127 */ "hash2", "imiss", "icmp", "rpa"
+};
-#if 0
- /* Now that we've jumbled things around, re-sort them. */
- sort_minimal_symbols ();
-#endif
+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",
+ /* 127 */ "sia", "sda"
+};
- /* relocate the exec and core sections as well. */
- vmap_exec ();
-}
-\f
-/* Keep an array of load segment information and their TOC table addresses.
- This info will be useful when calling a shared library function by hand. */
-
-struct loadinfo {
- CORE_ADDR textorg, dataorg;
- unsigned long toc_offset;
+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",
+ /* 142 */ "thrm3"
};
-#define LOADINFOLEN 10
-static struct loadinfo *loadinfo = NULL;
-static int loadinfolen = 0;
-static int loadinfotocindex = 0;
-static int loadinfotextindex = 0;
+/* Information about a particular processor variant. */
+struct variant
+{
+ /* Name of this variant. */
+ char *name;
+ /* English description of the variant. */
+ char *description;
-void
-xcoff_init_loadinfo ()
+ /* 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]))
+
+
+/* Information in this table comes from the following web sites:
+ IBM: http://www.chips.ibm.com:80/products/embedded/
+ Motorola: http://www.mot.com/SPS/PowerPC/
+
+ I'm sure I've got some of the variant descriptions not quite right.
+ Please report any inaccuracies you find to GDB's maintainer.
+
+ If you add entries to this table, please be sure to allow the new
+ value as an argument to the --with-cpu flag, in configure.in. */
+
+static struct variant
+variants[] =
{
- loadinfotocindex = 0;
- loadinfotextindex = 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 750",
+ num_registers (register_names_750), register_names_750 },
+ { 0, 0, 0, 0 }
+};
- if (loadinfolen == 0) {
- loadinfo = (struct loadinfo *)
- xmalloc (sizeof (struct loadinfo) * LOADINFOLEN);
- loadinfolen = LOADINFOLEN;
- }
+
+static struct variant *current_variant;
+
+char *
+rs6000_register_name (int i)
+{
+ if (i < 0 || i >= NUM_REGS)
+ error ("GDB bug: rs6000-tdep.c (rs6000_register_name): strange register number");
+
+ return ((i < current_variant->num_registers)
+ ? current_variant->registers[i]
+ : "");
}
-/* FIXME -- this is never called! */
-void
-free_loadinfo ()
+static void
+install_variant (struct variant *v)
{
- if (loadinfo)
- free (loadinfo);
- loadinfo = NULL;
- loadinfolen = 0;
- loadinfotocindex = 0;
- loadinfotextindex = 0;
+ current_variant = v;
}
-/* this is called from xcoffread.c */
-void
-xcoff_add_toc_to_loadinfo (unsigned long tocoff)
+/* Look up the variant named NAME in the `variants' table. Return a
+ pointer to the struct variant, or null if we couldn't find it. */
+static struct variant *
+find_variant_by_name (char *name)
{
- while (loadinfotocindex >= loadinfolen) {
- loadinfolen += LOADINFOLEN;
- loadinfo = (struct loadinfo *)
- xrealloc (loadinfo, sizeof(struct loadinfo) * loadinfolen);
- }
- loadinfo [loadinfotocindex++].toc_offset = tocoff;
+ int i;
+
+ for (i = 0; variants[i].name; i++)
+ if (! strcmp (name, variants[i].name))
+ return &variants[i];
+
+ return 0;
}
-void
-add_text_to_loadinfo (textaddr, dataaddr)
- CORE_ADDR textaddr;
- CORE_ADDR dataaddr;
+/* Install the PPC/RS6000 variant named NAME in the `variants' table.
+ Return zero if we installed it successfully, or a non-zero value if
+ we couldn't do it.
+
+ This might be useful to code outside this file, which doesn't want
+ to depend on the exact indices of the entries in the `variants'
+ table. Just make it non-static if you want that. */
+static int
+install_variant_by_name (char *name)
{
- while (loadinfotextindex >= loadinfolen) {
- loadinfolen += LOADINFOLEN;
- loadinfo = (struct loadinfo *)
- xrealloc (loadinfo, sizeof(struct loadinfo) * loadinfolen);
- }
- loadinfo [loadinfotextindex].textorg = textaddr;
- loadinfo [loadinfotextindex].dataorg = dataaddr;
- ++loadinfotextindex;
+ struct variant *v = find_variant_by_name (name);
+
+ if (v)
+ {
+ install_variant (v);
+ return 0;
+ }
+ else
+ return 1;
}
-/* FIXME: This assumes that the "textorg" and "dataorg" elements
- of a member of this array are correlated with the "toc_offset"
- element of the same member. But they are sequentially assigned in wildly
- different places, and probably there is no correlation. FIXME! */
+static void
+list_variants ()
+{
+ int i;
-static CORE_ADDR
-find_toc_address (pc)
- CORE_ADDR pc;
+ printf_filtered ("GDB knows about the following PowerPC and RS6000 variants:\n");
+
+ for (i = 0; variants[i].name; i++)
+ printf_filtered (" %-8s %s\n",
+ variants[i].name, variants[i].description);
+}
+
+
+static void
+show_current_variant ()
+{
+ printf_filtered ("PowerPC / RS6000 processor variant is set to `%s'.\n",
+ current_variant->name);
+}
+
+
+static void
+set_processor (char *arg, int from_tty)
{
- int ii, toc_entry, tocbase = 0;
+ int i;
+
+ if (! arg || arg[0] == '\0')
+ {
+ list_variants ();
+ return;
+ }
- for (ii=0; ii < loadinfotextindex; ++ii)
- if (pc > loadinfo[ii].textorg && loadinfo[ii].textorg > tocbase) {
- toc_entry = ii;
- tocbase = loadinfo[ii].textorg;
+ if (install_variant_by_name (arg))
+ {
+ error_begin ();
+ fprintf_filtered (gdb_stderr,
+ "`%s' is not a recognized PowerPC / RS6000 variant name.\n\n", arg);
+ list_variants ();
+ return_to_top_level (RETURN_ERROR);
}
- return loadinfo[toc_entry].dataorg + loadinfo[toc_entry].toc_offset;
+ show_current_variant ();
+}
+
+static void
+show_processor (char *arg, int from_tty)
+{
+ show_current_variant ();
+}
+
+
+\f
+/* Initialization code. */
+
+void
+_initialize_rs6000_tdep ()
+{
+ /* FIXME, this should not be decided via ifdef. */
+#ifdef GDB_TARGET_POWERPC
+ tm_print_insn = gdb_print_insn_powerpc;
+#else
+ tm_print_insn = print_insn_rs6000;
+#endif
+
+ /* I don't think we should use the set/show command arrangement
+ here, because the way that's implemented makes it hard to do the
+ error checking we want in a reasonable way. So we just add them
+ as two separate commands. */
+ add_cmd ("processor", class_support, set_processor,
+ "`set processor NAME' sets the PowerPC/RS6000 variant to NAME.\n\
+If you set this, GDB will know about the special-purpose registers that are\n\
+available on the given variant.\n\
+Type `set processor' alone for a list of recognized variant names.",
+ &setlist);
+ add_cmd ("processor", class_support, show_processor,
+ "Show the variant of the PowerPC or RS6000 processor in use.\n\
+Use `set processor' to change this.",
+ &showlist);
+
+ /* Set the current PPC processor variant. */
+ {
+ int status = 1;
+
+#ifdef TARGET_CPU_DEFAULT
+ status = install_variant_by_name (TARGET_CPU_DEFAULT);
+#endif
+
+ if (status)
+ {
+#ifdef GDB_TARGET_POWERPC
+ install_variant_by_name ("ppc-uisa");
+#else
+ install_variant_by_name ("rs6000");
+#endif
+ }
+ }
}
projects / thirdparty / binutils-gdb.git / blobdiff