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-rw-r--r--gdb/rs6000-xdep.c319
1 files changed, 28 insertions, 291 deletions
diff --git a/gdb/rs6000-xdep.c b/gdb/rs6000-xdep.c
index b4a1851..a80ee14 100644
--- a/gdb/rs6000-xdep.c
+++ b/gdb/rs6000-xdep.c
@@ -1,5 +1,5 @@
/* IBM RS/6000 host-dependent code for GDB, the GNU debugger.
- Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
@@ -23,6 +23,8 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "symtab.h"
#include "target.h"
+#ifdef RS6000_TARGET
+
#include <sys/param.h>
#include <sys/dir.h>
#include <sys/user.h>
@@ -37,11 +39,11 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/core.h>
-#include <sys/ldr.h>
-#include <sys/utsname.h>
extern int errno;
-extern int attach_flag;
+
+static void
+exec_one_dummy_insn PARAMS ((void));
/* Conversion from gdb-to-system special purpose register numbers.. */
@@ -54,13 +56,6 @@ static int special_regs[] = {
XER, /* XER_REGNUM */
MQ /* MQ_REGNUM */
};
-
-
-/* Nonzero if we just simulated a single step break. */
-extern int one_stepped;
-
-extern struct obstack frame_cache_obstack;
-
void
fetch_inferior_registers (regno)
@@ -229,269 +224,10 @@ fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
}
-frameless_function_invocation (fi)
-struct frame_info *fi;
-{
- CORE_ADDR func_start;
- struct aix_framedata fdata;
-
- func_start = get_pc_function_start (fi->pc) + FUNCTION_START_OFFSET;
-
- /* If we failed to find the start of the function, it is a mistake
- to inspect the instructions. */
-
- if (!func_start)
- return 0;
-
- function_frame_info (func_start, &fdata);
- return fdata.frameless;
-}
-
-
-/* If saved registers of frame FI are not known yet, read and cache them.
- &FDATAP contains aix_framedata; TDATAP can be NULL,
- in which case the framedata are read.
- */
-
-static void
-frame_get_cache_fsr (fi, fdatap)
- struct frame_info *fi;
- struct aix_framedata *fdatap;
-{
- int ii;
- CORE_ADDR frame_addr;
- struct aix_framedata work_fdata;
- if (fi->cache_fsr)
- return;
-
- if (fdatap == NULL) {
- fdatap = &work_fdata;
- function_frame_info (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));
-
- 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. */
-
- 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 != -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. */
-
- if (fdatap->saved_gpr >= 0)
- for (ii=31; ii >= fdatap->saved_gpr; --ii)
- fi->cache_fsr->regs [ii] = frame_addr - ((32 - ii) * 4);
-}
-
-/* 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
-frame_initial_stack_address (fi)
- struct frame_info *fi;
-{
- CORE_ADDR tmpaddr;
- struct aix_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;
-
- /* find out if this function is using an alloca register.. */
-
- function_frame_info (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 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;
- }
-
- /* 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);
-
- /* 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) {
-
- if (!callee_fi->cache_fsr)
- frame_get_cache_fsr (fi, NULL);
-
- /* this is the address in which alloca register is saved. */
-
- tmpaddr = callee_fi->cache_fsr->regs [fdata.alloca_reg];
- if (tmpaddr) {
- fi->initial_sp = read_memory_integer (tmpaddr, 4);
- return fi->initial_sp;
- }
-
- /* 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 fi->initial_sp = read_register (fdata.alloca_reg);
-}
-
-
-
-/* aixcoff_relocate_symtab - hook for symbol table relocation.
- also reads shared libraries.. */
-
-aixcoff_relocate_symtab (pid)
-unsigned int pid;
-{
-#define MAX_LOAD_SEGS 64 /* maximum number of load segments */
-
- struct ld_info *ldi;
- int temp;
-
- ldi = (void *) alloca(MAX_LOAD_SEGS * sizeof (*ldi));
-
- /* According to my humble theory, aixcoff 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. */
-
- usleep (36000);
-
- 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;
- }
-
- vmap_ldinfo(ldi);
-
- do {
- add_text_to_loadinfo (ldi->ldinfo_textorg, ldi->ldinfo_dataorg);
- } while (ldi->ldinfo_next
- && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi)));
-
-#if 0
- /* Now that we've jumbled things around, re-sort them. */
- sort_minimal_symbols ();
-#endif
-
- /* relocate the exec and core sections as well. */
- vmap_exec ();
-}
-
-
-/* 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. */
-
-typedef struct {
- unsigned long textorg, dataorg, toc_offset;
-} LoadInfo;
-
-#define LOADINFOLEN 10
-
-static LoadInfo *loadInfo = NULL;
-static int loadInfoLen = 0;
-static int loadInfoTocIndex = 0;
-int aix_loadInfoTextIndex = 0;
-
-
-xcoff_init_loadinfo ()
-{
- loadInfoTocIndex = 0;
- aix_loadInfoTextIndex = 0;
-
- if (loadInfoLen == 0) {
- loadInfo = (void*) xmalloc (sizeof (LoadInfo) * LOADINFOLEN);
- loadInfoLen = LOADINFOLEN;
- }
-}
-
-
-free_loadinfo ()
-{
- if (loadInfo)
- free (loadInfo);
- loadInfo = NULL;
- loadInfoLen = 0;
- loadInfoTocIndex = 0;
- aix_loadInfoTextIndex = 0;
-}
-
-
-xcoff_add_toc_to_loadinfo (unsigned long tocaddr)
-{
- while (loadInfoTocIndex >= loadInfoLen) {
- loadInfoLen += LOADINFOLEN;
- loadInfo = (void*) xrealloc (loadInfo, sizeof(LoadInfo) * loadInfoLen);
- }
- loadInfo [loadInfoTocIndex++].toc_offset = tocaddr;
-}
-
-
-add_text_to_loadinfo (unsigned long textaddr, unsigned long dataaddr)
-{
- while (aix_loadInfoTextIndex >= loadInfoLen) {
- loadInfoLen += LOADINFOLEN;
- loadInfo = (void*) xrealloc (loadInfo, sizeof(LoadInfo) * loadInfoLen);
- }
- loadInfo [aix_loadInfoTextIndex].textorg = textaddr;
- loadInfo [aix_loadInfoTextIndex].dataorg = dataaddr;
- ++aix_loadInfoTextIndex;
-}
-
-
-unsigned long
-find_toc_address (unsigned long pc)
-{
- int ii, toc_entry, tocbase = 0;
-
- for (ii=0; ii < aix_loadInfoTextIndex; ++ii)
- if (pc > loadInfo [ii].textorg && loadInfo [ii].textorg > tocbase) {
- toc_entry = ii;
- tocbase = loadInfo [ii].textorg;
- }
-
- return loadInfo [toc_entry].dataorg + loadInfo [toc_entry].toc_offset;
-}
-
-
-/* execute one dummy breakpoint instruction. This way we give kernel
+/* Execute one dummy breakpoint instruction. This way we give the kernel
a chance to do some housekeeping and update inferior's internal data,
including u_area. */
-
+static void
exec_one_dummy_insn ()
{
#define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200
@@ -517,28 +253,29 @@ exec_one_dummy_insn ()
}
-#if 0
+#else /* RS6000_TARGET */
- *** not needed anymore ***
+/* FIXME: Kludge this til we separate host vs. target vs. native code. */
-/* Return the number of initial trap signals we need to ignore once the inferior
- process starts running. This will be `2' for aix-3.1, `3' for aix-3.2 */
-
-int
-aix_starting_inferior_traps ()
+void
+fetch_inferior_registers (regno)
+ int regno;
{
- struct utsname unamebuf;
+}
- if (uname (&unamebuf) == -1)
- fatal ("uname(3) failed.");
+void
+store_inferior_registers (regno)
+ int regno;
+{
+}
- /* Assume the future versions will behave like 3.2 and return '3' for
- anything other than 3.1x. The extra trap in 3.2 is the "trap after the
- program is loaded" signal. */
-
- if (unamebuf.version[0] == '3' && unamebuf.release[0] == '1')
- return 2;
- else
- return 3;
+void
+fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
+ char *core_reg_sect;
+ unsigned core_reg_size;
+ int which;
+ unsigned int reg_addr; /* Unused in this version */
+{
}
-#endif
+
+#endif /* RS6000_TARGET */
generated by cgit v1.1 at 2024-12-14 19:59:37 +0000