diff options
Diffstat (limited to 'gdb/i386-tdep.c')
| -rw-r--r-- | gdb/i386-tdep.c | 76 |
1 files changed, 70 insertions, 6 deletions
diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c index d0363e6..6aef61b 100644 --- a/gdb/i386-tdep.c +++ b/gdb/i386-tdep.c @@ -58,9 +58,11 @@ static char *valid_flavors[] = }; static char *disassembly_flavor = att_flavor; +static void i386_print_register PARAMS ((char *, int, int)); + /* This is used to keep the bfd arch_info in sync with the disassembly flavor. */ static void set_disassembly_flavor_sfunc PARAMS ((char *, int, struct cmd_list_element *)); -static void set_disassembly_flavor (); +static void set_disassembly_flavor PARAMS ((void)); /* Stdio style buffering was used to minimize calls to ptrace, but this buffering did not take into account that the code section being accessed @@ -674,21 +676,38 @@ i386_extract_return_value (type, regbuf, valbuf) char regbuf[REGISTER_BYTES]; char *valbuf; { -/* On AIX, floating point values are returned in floating point registers. */ -#ifdef I386_AIX_TARGET + /* On AIX and i386 GNU/Linux, floating point values are returned in + floating point registers. */ +#if defined(I386_AIX_TARGET) || defined(I386_GNULINUX_TARGET) if (TYPE_CODE_FLT == TYPE_CODE (type)) { double d; /* 387 %st(0), gcc uses this */ floatformat_to_double (&floatformat_i387_ext, - ®buf[REGISTER_BYTE (FP0_REGNUM)], + ®buf[REGISTER_BYTE(FPDATA_REGNUM)], &d); store_floating (valbuf, TYPE_LENGTH (type), d); } else -#endif /* I386_AIX_TARGET */ +#endif /* I386_AIX_TARGET || I386_GNULINUX_TARGET*/ { - memcpy (valbuf, regbuf, TYPE_LENGTH (type)); + int len = TYPE_LENGTH (type); + int low_size = REGISTER_RAW_SIZE (LOW_RETURN_REGNUM); + int high_size = REGISTER_RAW_SIZE (HIGH_RETURN_REGNUM); + + if (len <= low_size) + memcpy (valbuf, regbuf + REGISTER_BYTE (LOW_RETURN_REGNUM), len); + else if (len <= (low_size + high_size)) + { + memcpy (valbuf, + regbuf + REGISTER_BYTE (LOW_RETURN_REGNUM), + low_size); + memcpy (valbuf + low_size, + regbuf + REGISTER_BYTE (HIGH_RETURN_REGNUM), + len - low_size); + } + else + error ("GDB bug: i386-tdep.c (i386_extract_return_value): Don't know how to find a return value %d bytes long", len); } } @@ -942,6 +961,51 @@ set_disassembly_flavor () set_architecture_from_arch_mach (bfd_arch_i386, bfd_mach_i386_i386_intel_syntax); } +/* Print the register regnum, or all registers if regnum is -1 */ + +void +i386_do_registers_info (regnum, fpregs) + int regnum; + int fpregs; +{ + char raw_regs [REGISTER_BYTES]; + int i; + + for (i = 0; i < NUM_REGS; i++) + read_relative_register_raw_bytes (i, raw_regs + REGISTER_BYTE (i)); + + if (regnum < FPSTART_REGNUM) + i386_print_register (raw_regs, regnum, fpregs); + else + i387_print_register (raw_regs, regnum); +} + +static void +i386_print_register (raw_regs, regnum, fpregs) + char *raw_regs; + int regnum; + int fpregs; +{ + int i; + long val; + char string[12]; + + for (i = 0; i < FPSTART_REGNUM; i++) + { + if ((regnum != -1) && (i != regnum)) + continue; + + val = extract_signed_integer (raw_regs + REGISTER_BYTE (i), 4); + + sprintf(string, "0x%x", val); + printf_filtered ("%8.8s: %10.10s %11d\n", REGISTER_NAME(i), string, val); + } + + if ((regnum == -1) && fpregs) + for (i = FPSTART_REGNUM; i < FPEND_REGNUM; i++) + i387_print_register (raw_regs, i); +} + void _initialize_i386_tdep () { |