diff options
Diffstat (limited to 'gdb/mips-tdep.c')
| -rw-r--r-- | gdb/mips-tdep.c | 50 |
1 files changed, 40 insertions, 10 deletions
diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c index 4dd70e6..8a9d93c 100644 --- a/gdb/mips-tdep.c +++ b/gdb/mips-tdep.c @@ -1,5 +1,5 @@ /* Target-dependent code for the MIPS architecture, for GDB, the GNU Debugger. - Copyright 1988, 1989, 1990, 1991 Free Software Foundation, Inc. + Copyright 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc. Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. @@ -19,7 +19,6 @@ 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. */ -#include <stdio.h> #include "defs.h" #include "frame.h" #include "inferior.h" @@ -351,7 +350,7 @@ init_extra_frame_info(fci) for (ireg = 31; mask; --ireg, mask <<= 1) if (mask & 0x80000000) { - fci->saved_regs->regs[32+ireg] = reg_position; + fci->saved_regs->regs[FP0_REGNUM+ireg] = reg_position; reg_position -= 4; } } @@ -539,12 +538,14 @@ mips_print_register(regnum, all) read_relative_register_raw_bytes (regnum, raw_buffer); - if (!(regnum & 1) && regnum >= FP0_REGNUM && regnum < FP0_REGNUM+32) { + /* If an even floating pointer register, also print as double. */ + if (regnum >= FP0_REGNUM && regnum < FP0_REGNUM+32 + && !((regnum-FP0_REGNUM) & 1)) { read_relative_register_raw_bytes (regnum+1, raw_buffer+4); - printf_filtered ("(d%d: ", regnum&31); + printf_filtered ("(d%d: ", regnum-FP0_REGNUM); val_print (builtin_type_double, raw_buffer, 0, stdout, 0, 1, 0, Val_pretty_default); - printf_filtered ("); ", regnum&31); + printf_filtered ("); "); } fputs_filtered (reg_names[regnum], stdout); #ifndef NUMERIC_REG_NAMES @@ -651,12 +652,19 @@ CORE_ADDR mips_skip_prologue(pc) struct symbol *f; struct block *b; unsigned long inst; + int offset; /* For -g modules and most functions anyways the - first instruction adjusts the stack. */ - inst = read_memory_integer(pc, 4); - if ((inst & 0xffff0000) == 0x27bd0000) - return pc + 4; + first instruction adjusts the stack. + But we allow some number of stores before the stack adjustment. + (These are emitted by varags functions compiled by gcc-2.0. */ + for (offset = 0; offset < 100; offset += 4) { + inst = read_memory_integer(pc + offset, 4); + if ((inst & 0xffff0000) == 0x27bd0000) /* addiu $sp,$sp,offset */ + return pc + offset + 4; + if ((inst & 0xFFE00000) != 0xAFA00000) /* sw reg,n($sp) */ + break; + } /* Well, it looks like a frameless. Let's make sure. Note that we are not called on the current PC, @@ -679,3 +687,25 @@ CORE_ADDR mips_skip_prologue(pc) return pc; } + +/* Figure out where the longjmp will land. + We expect the first arg to be a pointer to the jmp_buf structure from which + we extract the pc (JB_PC) that we will land at. The pc is copied into PC. + This routine returns true on success. */ + +int +get_longjmp_target(pc) + CORE_ADDR *pc; +{ + CORE_ADDR jb_addr; + + jb_addr = read_register(A0_REGNUM); + + if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, pc, + sizeof(CORE_ADDR))) + return 0; + + SWAP_TARGET_AND_HOST(pc, sizeof(CORE_ADDR)); + + return 1; +} |