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Fix some little endian problems

This commit is contained in:
Michael Meissner 1995-06-06 14:49:32 +00:00
parent 4a44253637
commit 5c172b4bfd
3 changed files with 48 additions and 8 deletions
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28
gdb/ChangeLog
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@ -1,3 +1,31 @@
Tue Jun 6 10:44:25 1995 Michael Meissner <meissner@tiktok.cygnus.com>
From Andrew Cagney <cagney@highland.com.au>
* rs6000-tdep.c (single_step): Handle both little and big endian
breakpoints.
(gdb_print_insn_powerpc): Deal with disassembling both little and
big endian PowerPC systems.
(_initialize_rs6000_tdep): Use gdb_print_insn_powerpc to handle
disassembly, rather that assuming big endian order.
* config/rs6000/tm-rs6000.h (BREAKPOINT): Delete.
(BIG_BREAKPOINT): Define, big endian breakpoint instruction.
(LITTLE_BREAKPOINT): Define, little endian breakpoint instruction.
Sat Jun 3 01:54:56 1995 Peter Schauer (pes@regent.e-technik.tu-muenchen.de)
* README: Add note about Unixware 2.x.
* dbxread.c (process_one_symbol): Check for exact symbol name
match when fixing up N_GSYM and N_STSYM symbols from Sun acc.
* valprint.c (value_print_array_elements): Use
fprintf_filtered to put out `<repeats %u times>',
from schwab@issan.informatik.uni-dortmund.de (Andreas Schwab).
* value.h (struct value): Change `repetitions' field from
`short' to `int' type.
start-sanitize-arc
Fri Jun 2 11:17:23 1995 Doug Evans <dje@canuck.cygnus.com>

9
gdb/config/rs6000/tm-rs6000.h
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@ -43,10 +43,6 @@ extern char *corefile;
#endif
extern int inferior_pid;
/* setpgrp() messes up controling terminal. The other version of it
requires libbsd.a. */
#define setpgrp(XX,YY) setpgid (XX, YY)
/* We are missing register descriptions in the system header files. Sigh! */
struct regs {
@ -153,7 +149,8 @@ function_frame_info PARAMS ((CORE_ADDR, struct aix_framedata *));
/* Sequence of bytes for breakpoint instruction. */
#define BREAKPOINT {0x7d, 0x82, 0x10, 0x08}
#define BIG_BREAKPOINT { 0x7d, 0x82, 0x10, 0x08 }
#define LITTLE_BREAKPOINT { 0x08, 0x10, 0x82, 0x7d }
/* Amount PC must be decremented by after a breakpoint.
This is often the number of bytes in BREAKPOINT
@ -405,7 +402,7 @@ CORE_ADDR rs6000_frame_chain PARAMS ((struct frame_info *));
/* 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). */
/* to which the signal handler returns). */ \
fi->signal_handler_caller = 1;
/* If the kernel has to deliver a signal, it pushes a sigcontext

19
gdb/rs6000-tdep.c
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@ -126,7 +126,9 @@ single_step (signal)
{
#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];
@ -1221,12 +1223,25 @@ find_toc_address (pc)
return loadinfo[toc_entry].dataorg + loadinfo[toc_entry].toc_offset;
}
#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
void
_initialize_rs6000_tdep ()
{
/* FIXME, this should not be decided via ifdef. */
#ifdef GDB_TARGET_POWERPC
tm_print_insn = print_insn_big_powerpc;
tm_print_insn = gdb_print_insn_powerpc;
#else
tm_print_insn = print_insn_rs6000;
#endif