diff options
Diffstat (limited to 'gdb/symmetry-xdep.c')
-rwxr-xr-x | gdb/symmetry-xdep.c | 557 |
1 files changed, 557 insertions, 0 deletions
diff --git a/gdb/symmetry-xdep.c b/gdb/symmetry-xdep.c new file mode 100755 index 0000000..3449678 --- /dev/null +++ b/gdb/symmetry-xdep.c @@ -0,0 +1,557 @@ +/* Sequent Symmetry host interface, for GDB when running under Unix. + Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc. + +This file is part of GDB. + +GDB is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 1, or (at your option) +any later version. + +GDB is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GDB; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* many 387-specific items of use taken from i386-dep.c */ + +#include <stdio.h> +#include "defs.h" +#include "param.h" +#include "frame.h" +#include "inferior.h" +#include "symtab.h" + +#include <signal.h> +#include <sys/param.h> +#include <sys/user.h> +#include <sys/dir.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include "gdbcore.h" +#include <fcntl.h> + +static long i386_get_frame_setup (); +static i386_follow_jump (); + +#include <sgtty.h> +#define TERMINAL struct sgttyb + +store_inferior_registers(regno) +int regno; +{ + struct pt_regset regs; + int reg_tmp, i; + extern char registers[]; + +#if 0 + /* PREPARE_TO_STORE deals with this. */ + if (-1 == regno) + { +#endif + regs.pr_eax = *(int *)®isters[REGISTER_BYTE(0)]; + regs.pr_ebx = *(int *)®isters[REGISTER_BYTE(5)]; + regs.pr_ecx = *(int *)®isters[REGISTER_BYTE(2)]; + regs.pr_edx = *(int *)®isters[REGISTER_BYTE(1)]; + regs.pr_esi = *(int *)®isters[REGISTER_BYTE(6)]; + regs.pr_edi = *(int *)®isters[REGISTER_BYTE(7)]; + regs.pr_esp = *(int *)®isters[REGISTER_BYTE(14)]; + regs.pr_ebp = *(int *)®isters[REGISTER_BYTE(15)]; + regs.pr_eip = *(int *)®isters[REGISTER_BYTE(16)]; + regs.pr_flags = *(int *)®isters[REGISTER_BYTE(17)]; + for (i = 0; i < 31; i++) { + regs.pr_fpa.fpa_regs[i] = + *(int *)®isters[REGISTER_BYTE(FP1_REGNUM+i)]; + } +#if 0 + } + else + { + reg_tmp = *(int *)®isters[REGISTER_BYTE(regno)]; + ptrace(XPT_RREGS, inferior_pid, ®s, 0); + switch (regno) + { + case 0: + regs.pr_eax = *(int *)®isters[REGISTER_BYTE(0)]; + break; + case 5: + regs.pr_ebx = *(int *)®isters[REGISTER_BYTE(5)]; + break; + case 2: + regs.pr_ecx = *(int *)®isters[REGISTER_BYTE(2)]; + break; + case 1: + regs.pr_edx = *(int *)®isters[REGISTER_BYTE(1)]; + break; + case 6: + regs.pr_esi = *(int *)®isters[REGISTER_BYTE(6)]; + break; + case 7: + regs.pr_edi = *(int *)®isters[REGISTER_BYTE(7)]; + break; + case 15: + regs.pr_ebp = *(int *)®isters[REGISTER_BYTE(15)]; + break; + case 14: + regs.pr_esp = *(int *)®isters[REGISTER_BYTE(14)]; + break; + case 16: + regs.pr_eip = *(int *)®isters[REGISTER_BYTE(16)]; + break; + case 17: + regs.pr_flags = *(int *)®isters[REGISTER_BYTE(17)]; + break; + } + } +#endif /* 0 */ + ptrace(XPT_WREGS, inferior_pid, ®s, 0); +} + +void +fetch_inferior_registers() +{ + int i; + struct pt_regset regs; + extern char registers[]; + + registers_fetched (); + + ptrace(XPT_RREGS, inferior_pid, ®s, 0); + *(int *)®isters[REGISTER_BYTE(0)] = regs.pr_eax; + *(int *)®isters[REGISTER_BYTE(5)] = regs.pr_ebx; + *(int *)®isters[REGISTER_BYTE(2)] = regs.pr_ecx; + *(int *)®isters[REGISTER_BYTE(1)] = regs.pr_edx; + *(int *)®isters[REGISTER_BYTE(6)] = regs.pr_esi; + *(int *)®isters[REGISTER_BYTE(7)] = regs.pr_edi; + *(int *)®isters[REGISTER_BYTE(15)] = regs.pr_ebp; + *(int *)®isters[REGISTER_BYTE(14)] = regs.pr_esp; + *(int *)®isters[REGISTER_BYTE(16)] = regs.pr_eip; + *(int *)®isters[REGISTER_BYTE(17)] = regs.pr_flags; + for (i = 0; i < FPA_NREGS; i++) { + *(int *)®isters[REGISTER_BYTE(FP1_REGNUM+i)] = regs.pr_fpa.fpa_regs[i]; + } + bcopy(regs.pr_fpu.fpu_stack[0], ®isters[REGISTER_BYTE(3)], 10); + bcopy(regs.pr_fpu.fpu_stack[1], ®isters[REGISTER_BYTE(4)], 10); + bcopy(regs.pr_fpu.fpu_stack[2], ®isters[REGISTER_BYTE(8)], 10); + bcopy(regs.pr_fpu.fpu_stack[3], ®isters[REGISTER_BYTE(9)], 10); + bcopy(regs.pr_fpu.fpu_stack[4], ®isters[REGISTER_BYTE(10)], 10); + bcopy(regs.pr_fpu.fpu_stack[5], ®isters[REGISTER_BYTE(11)], 10); + bcopy(regs.pr_fpu.fpu_stack[6], ®isters[REGISTER_BYTE(12)], 10); + bcopy(regs.pr_fpu.fpu_stack[7], ®isters[REGISTER_BYTE(13)], 10); +} + + +/* Work with core dump and executable files, for GDB. + This code would be in core.c if it weren't machine-dependent. */ + +#include "gdbcore.h" + +void +core_file_command (filename, from_tty) + char *filename; + int from_tty; +{ + int val; + extern char registers[]; + + /* Discard all vestiges of any previous core file + and mark data and stack spaces as empty. */ + + if (corefile) + free (corefile); + corefile = 0; + + if (corechan >= 0) + close (corechan); + corechan = -1; + + data_start = 0; + data_end = 0; + stack_start = STACK_END_ADDR; + stack_end = STACK_END_ADDR; + + /* Now, if a new core file was specified, open it and digest it. */ + + if (filename) + { + filename = tilde_expand (filename); + make_cleanup (free, filename); + + if (have_inferior_p ()) + error ("To look at a core file, you must kill the inferior with \"kill\"."); + corechan = open (filename, O_RDONLY, 0); + if (corechan < 0) + perror_with_name (filename); + /* 4.2-style (and perhaps also sysV-style) core dump file. */ + { + struct user u; + int reg_offset; + + val = myread (corechan, &u, sizeof u); + if (val < 0) + perror_with_name (filename); + data_start = exec_data_start; + + data_end = data_start + NBPG * (u.u_dsize - u.u_tsize); + stack_start = stack_end - NBPG * u.u_ssize; + data_offset = NBPG * UPAGES; + stack_offset = ctob(UPAGES + u.u_dsize - u.u_tsize); + reg_offset = (int) u.u_ar0 - KERNEL_U_ADDR; +printf("u.u_tsize= %#x, u.u_dsize= %#x, u.u_ssize= %#x, stack_off= %#x\n", + u.u_tsize, u.u_dsize, u.u_ssize, stack_offset); + + core_aouthdr.a_magic = 0; + + /* Read the register values out of the core file and store + them where `read_register' will find them. */ + + { + register int regno; + + for (regno = 0; regno < NUM_REGS; regno++) + { + char buf[MAX_REGISTER_RAW_SIZE]; + + val = lseek (corechan, register_addr (regno, reg_offset), 0); + if (val < 0) + perror_with_name (filename); + + val = myread (corechan, buf, sizeof buf); + if (val < 0) + perror_with_name (filename); + supply_register (regno, buf); + } + } + } + if (filename[0] == '/') + corefile = savestring (filename, strlen (filename)); + else + { + corefile = concat (current_directory, "/", filename); + } + + set_current_frame(create_new_frame(read_register(FP_REGNUM), + read_pc())); +/* set_current_frame (read_register (FP_REGNUM));*/ + select_frame (get_current_frame (), 0); + validate_files (); + } + else if (from_tty) + printf ("No core file now.\n"); +} + +/* from i386-dep.c */ +static +print_387_control_word (control) +unsigned short control; +{ + printf ("control 0x%04x: ", control); + printf ("compute to "); + switch ((control >> 8) & 3) + { + case 0: printf ("24 bits; "); break; + case 1: printf ("(bad); "); break; + case 2: printf ("53 bits; "); break; + case 3: printf ("64 bits; "); break; + } + printf ("round "); + switch ((control >> 10) & 3) + { + case 0: printf ("NEAREST; "); break; + case 1: printf ("DOWN; "); break; + case 2: printf ("UP; "); break; + case 3: printf ("CHOP; "); break; + } + if (control & 0x3f) + { + printf ("mask:"); + if (control & 0x0001) printf (" INVALID"); + if (control & 0x0002) printf (" DENORM"); + if (control & 0x0004) printf (" DIVZ"); + if (control & 0x0008) printf (" OVERF"); + if (control & 0x0010) printf (" UNDERF"); + if (control & 0x0020) printf (" LOS"); + printf (";"); + } + printf ("\n"); + if (control & 0xe080) printf ("warning: reserved bits on 0x%x\n", + control & 0xe080); +} + +static +print_387_status_word (status) + unsigned short status; +{ + printf ("status %#04x: ", status); + if (status & 0xff) { + printf ("exceptions:"); /* exception names match <machine/fpu.h> */ + if (status & 0x0001) printf (" FLTINV"); + if (status & 0x0002) printf (" FLTDEN"); + if (status & 0x0004) printf (" FLTDIV"); + if (status & 0x0008) printf (" FLTOVF"); + if (status & 0x0010) printf (" FLTUND"); + if (status & 0x0020) printf (" FLTPRE"); + if (status & 0x0040) printf (" FLTSTK"); + printf ("; "); + } + printf ("flags: %d%d%d%d; ", + (status & 0x4000) != 0, + (status & 0x0400) != 0, + (status & 0x0200) != 0, + (status & 0x0100) != 0); + + printf ("top %d\n", (status >> 11) & 7); +} + +static +print_fpu_status(ep) +struct pt_regset ep; + +{ + int i; + int bothstatus; + int top; + int fpreg; + unsigned char *p; + + printf("80387:"); + if (ep.pr_fpu.fpu_ip == 0) { + printf(" not in use.\n"); + return; + } else { + printf("\n"); + } + if (ep.pr_fpu.fpu_status != 0) { + print_387_status_word (ep.pr_fpu.fpu_status); + } + print_387_control_word (ep.pr_fpu.fpu_control); + printf ("last exception: "); + printf ("opcode 0x%x; ", ep.pr_fpu.fpu_rsvd4); + printf ("pc 0x%x:0x%x; ", ep.pr_fpu.fpu_cs, ep.pr_fpu.fpu_ip); + printf ("operand 0x%x:0x%x\n", ep.pr_fpu.fpu_data_offset, ep.pr_fpu.fpu_op_sel); + + top = (ep.pr_fpu.fpu_status >> 11) & 7; + + printf ("regno tag msb lsb value\n"); + for (fpreg = 7; fpreg >= 0; fpreg--) + { + double val; + + printf ("%s %d: ", fpreg == top ? "=>" : " ", fpreg); + + switch ((ep.pr_fpu.fpu_tag >> (fpreg * 2)) & 3) + { + case 0: printf ("valid "); break; + case 1: printf ("zero "); break; + case 2: printf ("trap "); break; + case 3: printf ("empty "); break; + } + for (i = 9; i >= 0; i--) + printf ("%02x", ep.pr_fpu.fpu_stack[fpreg][i]); + + i387_to_double (ep.pr_fpu.fpu_stack[fpreg], (char *)&val); + printf (" %g\n", val); + } + if (ep.pr_fpu.fpu_rsvd1) + printf ("warning: rsvd1 is 0x%x\n", ep.pr_fpu.fpu_rsvd1); + if (ep.pr_fpu.fpu_rsvd2) + printf ("warning: rsvd2 is 0x%x\n", ep.pr_fpu.fpu_rsvd2); + if (ep.pr_fpu.fpu_rsvd3) + printf ("warning: rsvd3 is 0x%x\n", ep.pr_fpu.fpu_rsvd3); + if (ep.pr_fpu.fpu_rsvd5) + printf ("warning: rsvd5 is 0x%x\n", ep.pr_fpu.fpu_rsvd5); +} + + +print_1167_control_word(pcr) +unsigned int pcr; + +{ + int pcr_tmp; + + pcr_tmp = pcr & FPA_PCR_MODE; + printf("\tMODE= %#x; RND= %#x ", pcr_tmp, pcr_tmp & 12); + switch (pcr_tmp & 12) { + case 0: + printf("RN (Nearest Value)"); + break; + case 1: + printf("RZ (Zero)"); + break; + case 2: + printf("RP (Positive Infinity)"); + break; + case 3: + printf("RM (Negative Infinity)"); + break; + } + printf("; IRND= %d ", pcr_tmp & 2); + if (0 == pcr_tmp & 2) { + printf("(same as RND)\n"); + } else { + printf("(toward zero)\n"); + } + pcr_tmp = pcr & FPA_PCR_EM; + printf("\tEM= %#x", pcr_tmp); + if (pcr_tmp & FPA_PCR_EM_DM) printf(" DM"); + if (pcr_tmp & FPA_PCR_EM_UOM) printf(" UOM"); + if (pcr_tmp & FPA_PCR_EM_PM) printf(" PM"); + if (pcr_tmp & FPA_PCR_EM_UM) printf(" UM"); + if (pcr_tmp & FPA_PCR_EM_OM) printf(" OM"); + if (pcr_tmp & FPA_PCR_EM_ZM) printf(" ZM"); + if (pcr_tmp & FPA_PCR_EM_IM) printf(" IM"); + printf("\n"); + pcr_tmp = FPA_PCR_CC; + printf("\tCC= %#x", pcr_tmp); + if (pcr_tmp & FPA_PCR_20MHZ) printf(" 20MHZ"); + if (pcr_tmp & FPA_PCR_CC_Z) printf(" Z"); + if (pcr_tmp & FPA_PCR_CC_C2) printf(" C2"); + if (pcr_tmp & FPA_PCR_CC_C1) printf(" C1"); + switch (pcr_tmp) { + case FPA_PCR_CC_Z: + printf(" (Equal)"); + break; + case FPA_PCR_CC_C1: + printf(" (Less than)"); + break; + case 0: + printf(" (Greater than)"); + break; + case FPA_PCR_CC_Z | FPA_PCR_CC_C1 | FPA_PCR_CC_C2: + printf(" (Unordered)"); + break; + default: + printf(" (Undefined)"); + break; + } + printf("\n"); + pcr_tmp = pcr & FPA_PCR_AE; + printf("\tAE= %#x", pcr_tmp); + if (pcr_tmp & FPA_PCR_AE_DE) printf(" DE"); + if (pcr_tmp & FPA_PCR_AE_UOE) printf(" UOE"); + if (pcr_tmp & FPA_PCR_AE_PE) printf(" PE"); + if (pcr_tmp & FPA_PCR_AE_UE) printf(" UE"); + if (pcr_tmp & FPA_PCR_AE_OE) printf(" OE"); + if (pcr_tmp & FPA_PCR_AE_ZE) printf(" ZE"); + if (pcr_tmp & FPA_PCR_AE_EE) printf(" EE"); + if (pcr_tmp & FPA_PCR_AE_IE) printf(" IE"); + printf("\n"); +} + +print_1167_regs(regs) +long regs[FPA_NREGS]; + +{ + int i; + + union { + double d; + long l[2]; + } xd; + union { + float f; + long l; + } xf; + + + for (i = 0; i < FPA_NREGS; i++) { + xf.l = regs[i]; + printf("%%fp%d: raw= %#x, single= %f", i+1, regs[i], xf.f); + if (!(i & 1)) { + printf("\n"); + } else { + xd.l[1] = regs[i]; + xd.l[0] = regs[i+1]; + printf(", double= %f\n", xd.d); + } + } +} + +print_fpa_status(ep) +struct pt_regset ep; + +{ + + printf("WTL 1167:"); + if (ep.pr_fpa.fpa_pcr !=0) { + printf("\n"); + print_1167_control_word(ep.pr_fpa.fpa_pcr); + print_1167_regs(ep.pr_fpa.fpa_regs); + } else { + printf(" not in use.\n"); + } +} + +i386_float_info () + +{ + char ubuf[UPAGES*NBPG]; + struct pt_regset regset; + extern int corechan; + + if (have_inferior_p()) { + call_ptrace(XPT_RREGS, inferior_pid, ®set, 0); + } else { + if (lseek (corechan, 0, 0) < 0) { + perror ("seek on core file"); + } + if (myread (corechan, ubuf, UPAGES*NBPG) < 0) { + perror ("read on core file"); + } + /* only interested in the floating point registers */ + regset.pr_fpu = ((struct user *) ubuf)->u_fpusave; + regset.pr_fpa = ((struct user *) ubuf)->u_fpasave; + } + print_fpu_status(regset); + print_fpa_status(regset); +} + +i387_to_double (from, to) + char *from; + char *to; +{ + long *lp; + /* push extended mode on 387 stack, then pop in double mode + * + * first, set exception masks so no error is generated - + * number will be rounded to inf or 0, if necessary + */ + asm ("pushl %eax"); /* grab a stack slot */ + asm ("fstcw (%esp)"); /* get 387 control word */ + asm ("movl (%esp),%eax"); /* save old value */ + asm ("orl $0x3f,%eax"); /* mask all exceptions */ + asm ("pushl %eax"); + asm ("fldcw (%esp)"); /* load new value into 387 */ + + asm ("movl 8(%ebp),%eax"); + asm ("fldt (%eax)"); /* push extended number on 387 stack */ + asm ("fwait"); + asm ("movl 12(%ebp),%eax"); + asm ("fstpl (%eax)"); /* pop double */ + asm ("fwait"); + + asm ("popl %eax"); /* flush modified control word */ + asm ("fnclex"); /* clear exceptions */ + asm ("fldcw (%esp)"); /* restore original control word */ + asm ("popl %eax"); /* flush saved copy */ +} + +double_to_i387 (from, to) + char *from; + char *to; +{ + /* push double mode on 387 stack, then pop in extended mode + * no errors are possible because every 64-bit pattern + * can be converted to an extended + */ + asm ("movl 8(%ebp),%eax"); + asm ("fldl (%eax)"); + asm ("fwait"); + asm ("movl 12(%ebp),%eax"); + asm ("fstpt (%eax)"); + asm ("fwait"); +} |