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author | Andrew Cagney <cagney@redhat.com> | 2001-10-13 22:13:35 +0000 |
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committer | Andrew Cagney <cagney@redhat.com> | 2001-10-13 22:13:35 +0000 |
commit | 5769d3cd7dfe38f704e6818b4587a65f885879fa (patch) | |
tree | 1666b8fa77daca955a4446fe1940fff3190188a9 /gdb/s390-tdep.c | |
parent | 83e6b173e791941d7bbd5a0b2057832f56e28b1d (diff) | |
download | gdb-5769d3cd7dfe38f704e6818b4587a65f885879fa.zip gdb-5769d3cd7dfe38f704e6818b4587a65f885879fa.tar.gz gdb-5769d3cd7dfe38f704e6818b4587a65f885879fa.tar.bz2 |
S/390 31 & 64 bit target and GNU/Linux native support.
Contributed by D.J. Barrow <djbarrow@de.ibm.com> of IBM.
* s390-nat.c, s390-tdep.c: New file.
* config/s390/nm-linux.h, config/s390/s390.mh: New file.
* config/s390/s390.mt, config/s390/s390x.mt: New file.
* config/s390/tm-linux.h, config/s390/tm-s390.h: New file.
* config/s390/xm-linux.h: New file.
* NEWS: Update.
* MAINTAINERS: Update.
Diffstat (limited to 'gdb/s390-tdep.c')
-rw-r--r-- | gdb/s390-tdep.c | 1504 |
1 files changed, 1504 insertions, 0 deletions
diff --git a/gdb/s390-tdep.c b/gdb/s390-tdep.c new file mode 100644 index 0000000..1590268 --- /dev/null +++ b/gdb/s390-tdep.c @@ -0,0 +1,1504 @@ +/* Target-dependent code for GDB, the GNU debugger. + Copyright 2001 Free Software Foundation, Inc. + Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) + for IBM Deutschland Entwicklung GmbH, IBM Corporation. + + This file is part of GDB. + + This program 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 2 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + 02111-1307, USA. */ + +#define S390_TDEP /* for special macros in tm-s390.h */ +#include <defs.h> +#include "arch-utils.h" +#include "frame.h" +#include "inferior.h" +#include "symtab.h" +#include "target.h" +#include "gdbcore.h" +#include "gdbcmd.h" +#include "symfile.h" +#include "objfiles.h" +#include "tm.h" +#include "../bfd/bfd.h" +#include "floatformat.h" +#include "regcache.h" + + + + + +/* Number of bytes of storage in the actual machine representation + for register N. + Note that the unsigned cast here forces the result of the + subtraction to very high positive values if N < S390_FP0_REGNUM */ +int +s390_register_raw_size (int reg_nr) +{ + return ((unsigned) reg_nr - S390_FP0_REGNUM) < + S390_NUM_FPRS ? S390_FPR_SIZE : 4; +} + +int +s390x_register_raw_size (int reg_nr) +{ + return (reg_nr == S390_FPC_REGNUM) + || (reg_nr >= S390_FIRST_ACR && reg_nr <= S390_LAST_ACR) ? 4 : 8; +} + +int +s390_cannot_fetch_register (int regno) +{ + return (regno >= S390_FIRST_CR && regno < (S390_FIRST_CR + 9)) || + (regno >= (S390_FIRST_CR + 12) && regno <= S390_LAST_CR); +} + +int +s390_register_byte (int reg_nr) +{ + if (reg_nr <= S390_GP_LAST_REGNUM) + return reg_nr * S390_GPR_SIZE; + if (reg_nr <= S390_LAST_ACR) + return S390_ACR0_OFFSET + (((reg_nr) - S390_FIRST_ACR) * S390_ACR_SIZE); + if (reg_nr <= S390_LAST_CR) + return S390_CR0_OFFSET + (((reg_nr) - S390_FIRST_CR) * S390_CR_SIZE); + if (reg_nr == S390_FPC_REGNUM) + return S390_FPC_OFFSET; + else + return S390_FP0_OFFSET + (((reg_nr) - S390_FP0_REGNUM) * S390_FPR_SIZE); +} + +#ifndef GDBSERVER +#define S390_MAX_INSTR_SIZE (6) +#define S390_SYSCALL_OPCODE (0x0a) +#define S390_SYSCALL_SIZE (2) +#define S390_SIGCONTEXT_SREGS_OFFSET (8) +#define S390X_SIGCONTEXT_SREGS_OFFSET (8) +#define S390_SIGREGS_FP0_OFFSET (144) +#define S390X_SIGREGS_FP0_OFFSET (216) +#define S390_UC_MCONTEXT_OFFSET (256) +#define S390X_UC_MCONTEXT_OFFSET (344) +#define S390_STACK_FRAME_OVERHEAD (GDB_TARGET_IS_ESAME ? 160:96) +#define S390_SIGNAL_FRAMESIZE (GDB_TARGET_IS_ESAME ? 160:96) +#define s390_NR_sigreturn 119 +#define s390_NR_rt_sigreturn 173 + + + +struct frame_extra_info +{ + int initialised; + int good_prologue; + CORE_ADDR function_start; + CORE_ADDR skip_prologue_function_start; + CORE_ADDR saved_pc_valid; + CORE_ADDR saved_pc; + CORE_ADDR sig_fixed_saved_pc_valid; + CORE_ADDR sig_fixed_saved_pc; + CORE_ADDR frame_pointer_saved_pc; /* frame pointer needed for alloca */ + CORE_ADDR stack_bought; /* amount we decrement the stack pointer by */ + CORE_ADDR sigcontext; +}; + + +static CORE_ADDR s390_frame_saved_pc_nofix (struct frame_info *fi); + +int +s390_readinstruction (bfd_byte instr[], CORE_ADDR at, + struct disassemble_info *info) +{ + int instrlen; + + static int s390_instrlen[] = { + 2, + 4, + 4, + 6 + }; + if ((*info->read_memory_func) (at, &instr[0], 2, info)) + return -1; + instrlen = s390_instrlen[instr[0] >> 6]; + if ((*info->read_memory_func) (at + 2, &instr[2], instrlen - 2, info)) + return -1; + return instrlen; +} + +static void +s390_memset_extra_info (struct frame_extra_info *fextra_info) +{ + memset (fextra_info, 0, sizeof (struct frame_extra_info)); +} + + + +char * +s390_register_name (int reg_nr) +{ + static char *register_names[] = { + "pswm", "pswa", + "gpr0", "gpr1", "gpr2", "gpr3", "gpr4", "gpr5", "gpr6", "gpr7", + "gpr8", "gpr9", "gpr10", "gpr11", "gpr12", "gpr13", "gpr14", "gpr15", + "acr0", "acr1", "acr2", "acr3", "acr4", "acr5", "acr6", "acr7", + "acr8", "acr9", "acr10", "acr11", "acr12", "acr13", "acr14", "acr15", + "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", + "cr8", "cr9", "cr10", "cr11", "cr12", "cr13", "cr14", "cr15", + "fpc", + "fpr0", "fpr1", "fpr2", "fpr3", "fpr4", "fpr5", "fpr6", "fpr7", + "fpr8", "fpr9", "fpr10", "fpr11", "fpr12", "fpr13", "fpr14", "fpr15" + }; + + if (reg_nr >= S390_LAST_REGNUM) + return NULL; + return register_names[reg_nr]; +} + + + + +int +s390_stab_reg_to_regnum (int regno) +{ + return regno >= 64 ? S390_PSWM_REGNUM - 64 : + regno >= 48 ? S390_FIRST_ACR - 48 : + regno >= 32 ? S390_FIRST_CR - 32 : + regno <= 15 ? (regno + 2) : + S390_FP0_REGNUM + ((regno - 16) & 8) + (((regno - 16) & 3) << 1) + + (((regno - 16) & 4) >> 2); +} + + + +/* s390_get_frame_info based on Hartmuts + prologue definition in + gcc-2.8.1/config/l390/linux.c + + It reads one instruction at a time & based on whether + it looks like prologue code or not it makes a decision on + whether the prologue is over, there are various state machines + in the code to determine if the prologue code is possilby valid. + + This is done to hopefully allow the code survive minor revs of + calling conventions. + + */ + +int +s390_get_frame_info (CORE_ADDR pc, struct frame_extra_info *fextra_info, + struct frame_info *fi, int init_extra_info) +{ +#define CONST_POOL_REGIDX 13 +#define GOT_REGIDX 12 + bfd_byte instr[S390_MAX_INSTR_SIZE]; + CORE_ADDR test_pc = pc, test_pc2; + CORE_ADDR orig_sp = 0, save_reg_addr = 0, *saved_regs = NULL; + int valid_prologue, good_prologue = 0; + int gprs_saved[S390_NUM_GPRS]; + int fprs_saved[S390_NUM_FPRS]; + int regidx, instrlen; + int save_link_regidx, subtract_sp_regidx; + int const_pool_state, save_link_state, got_state; + int frame_pointer_found, varargs_state; + int loop_cnt, gdb_gpr_store, gdb_fpr_store; + int frame_pointer_regidx = 0xf; + int offset, expected_offset; + int err = 0; + disassemble_info info; + const_pool_state = save_link_state = got_state = varargs_state = 0; + frame_pointer_found = 0; + memset (gprs_saved, 0, sizeof (gprs_saved)); + memset (fprs_saved, 0, sizeof (fprs_saved)); + info.read_memory_func = dis_asm_read_memory; + + save_link_regidx = subtract_sp_regidx = 0; + if (fextra_info) + { + if (fi && fi->frame) + { + orig_sp = fi->frame + fextra_info->stack_bought; + saved_regs = fi->saved_regs; + } + if (init_extra_info || !fextra_info->initialised) + { + s390_memset_extra_info (fextra_info); + fextra_info->function_start = pc; + fextra_info->initialised = 1; + } + } + instrlen = 0; + do + { + valid_prologue = 0; + test_pc += instrlen; + /* add the previous instruction len */ + instrlen = s390_readinstruction (instr, test_pc, &info); + if (instrlen < 0) + { + good_prologue = 0; + err = -1; + break; + } + /* We probably are in a glibc syscall */ + if (instr[0] == S390_SYSCALL_OPCODE && test_pc == pc) + { + good_prologue = 1; + if (saved_regs && fextra_info && fi->next && fi->next->extra_info + && fi->next->extra_info->sigcontext) + { + /* We are backtracing from a signal handler */ + save_reg_addr = fi->next->extra_info->sigcontext + + REGISTER_BYTE (S390_GP0_REGNUM); + for (regidx = 0; regidx < S390_NUM_GPRS; regidx++) + { + saved_regs[S390_GP0_REGNUM + regidx] = save_reg_addr; + save_reg_addr += S390_GPR_SIZE; + } + save_reg_addr = fi->next->extra_info->sigcontext + + (GDB_TARGET_IS_ESAME ? S390X_SIGREGS_FP0_OFFSET : + S390_SIGREGS_FP0_OFFSET); + for (regidx = 0; regidx < S390_NUM_FPRS; regidx++) + { + saved_regs[S390_FP0_REGNUM + regidx] = save_reg_addr; + save_reg_addr += S390_FPR_SIZE; + } + } + break; + } + if (save_link_state == 0) + { + /* check for a stack relative STMG or STM */ + if (((GDB_TARGET_IS_ESAME && + ((instr[0] == 0xeb) && (instr[5] == 0x24))) || + (instr[0] == 0x90)) && ((instr[2] >> 4) == 0xf)) + { + regidx = (instr[1] >> 4); + if (regidx < 6) + varargs_state = 1; + offset = ((instr[2] & 0xf) << 8) + instr[3]; + expected_offset = + S390_GPR6_STACK_OFFSET + (S390_GPR_SIZE * (regidx - 6)); + if (offset != expected_offset) + { + good_prologue = 0; + break; + } + if (saved_regs) + save_reg_addr = orig_sp + offset; + for (; regidx <= (instr[1] & 0xf); regidx++) + { + if (gprs_saved[regidx]) + { + good_prologue = 0; + break; + } + good_prologue = 1; + gprs_saved[regidx] = 1; + if (saved_regs) + { + saved_regs[S390_GP0_REGNUM + regidx] = save_reg_addr; + save_reg_addr += S390_GPR_SIZE; + } + } + valid_prologue = 1; + continue; + } + } + /* check for a stack relative STG or ST */ + if ((save_link_state == 0 || save_link_state == 3) && + ((GDB_TARGET_IS_ESAME && + ((instr[0] == 0xe3) && (instr[5] == 0x24))) || + (instr[0] == 0x50)) && ((instr[2] >> 4) == 0xf)) + { + regidx = instr[1] >> 4; + offset = ((instr[2] & 0xf) << 8) + instr[3]; + if (offset == 0) + { + if (save_link_state == 3 && regidx == save_link_regidx) + { + save_link_state = 4; + valid_prologue = 1; + continue; + } + else + break; + } + if (regidx < 6) + varargs_state = 1; + expected_offset = + S390_GPR6_STACK_OFFSET + (S390_GPR_SIZE * (regidx - 6)); + if (offset != expected_offset) + { + good_prologue = 0; + break; + } + if (gprs_saved[regidx]) + { + good_prologue = 0; + break; + } + good_prologue = 1; + gprs_saved[regidx] = 1; + if (saved_regs) + { + save_reg_addr = orig_sp + offset; + saved_regs[S390_GP0_REGNUM + regidx] = save_reg_addr; + } + valid_prologue = 1; + continue; + } + + /* check for STD */ + if (instr[0] == 0x60 && (instr[2] >> 4) == 0xf) + { + regidx = instr[1] >> 4; + if (regidx == 0 || regidx == 2) + varargs_state = 1; + if (fprs_saved[regidx]) + { + good_prologue = 0; + break; + } + fprs_saved[regidx] = 1; + if (saved_regs) + { + save_reg_addr = orig_sp + (((instr[2] & 0xf) << 8) + instr[3]); + saved_regs[S390_FP0_REGNUM + regidx] = save_reg_addr; + } + valid_prologue = 1; + continue; + } + + + if (const_pool_state == 0) + { + + if (GDB_TARGET_IS_ESAME) + { + /* Check for larl CONST_POOL_REGIDX,offset on ESAME */ + if ((instr[0] == 0xc0) + && (instr[1] == (CONST_POOL_REGIDX << 4))) + { + const_pool_state = 2; + valid_prologue = 1; + continue; + } + } + else + { + /* Check for BASR gpr13,gpr0 used to load constant pool pointer to r13 in old compiler */ + if (instr[0] == 0xd && (instr[1] & 0xf) == 0 + && ((instr[1] >> 4) == CONST_POOL_REGIDX)) + { + const_pool_state = 1; + valid_prologue = 1; + continue; + } + } + /* Check for new fangled bras %r13,newpc to load new constant pool */ + /* embedded in code, older pre abi compilers also emitted this stuff. */ + if ((instr[0] == 0xa7) && ((instr[1] & 0xf) == 0x5) && + ((instr[1] >> 4) == CONST_POOL_REGIDX) + && ((instr[2] & 0x80) == 0)) + { + const_pool_state = 2; + test_pc += + (((((instr[2] & 0xf) << 8) + instr[3]) << 1) - instrlen); + valid_prologue = 1; + continue; + } + } + /* Check for AGHI or AHI CONST_POOL_REGIDX,val */ + if (const_pool_state == 1 && (instr[0] == 0xa7) && + ((GDB_TARGET_IS_ESAME && + (instr[1] == ((CONST_POOL_REGIDX << 4) | 0xb))) || + (instr[1] == ((CONST_POOL_REGIDX << 4) | 0xa)))) + { + const_pool_state = 2; + valid_prologue = 1; + continue; + } + /* Check for LGR or LR gprx,15 */ + if ((GDB_TARGET_IS_ESAME && + instr[0] == 0xb9 && instr[1] == 0x04 && (instr[3] & 0xf) == 0xf) || + (instr[0] == 0x18 && (instr[1] & 0xf) == 0xf)) + { + if (GDB_TARGET_IS_ESAME) + regidx = instr[3] >> 4; + else + regidx = instr[1] >> 4; + if (save_link_state == 0 && regidx != 0xb) + { + /* Almost defintely code for + decrementing the stack pointer + ( i.e. a non leaf function + or else leaf with locals ) */ + save_link_regidx = regidx; + save_link_state = 1; + valid_prologue = 1; + continue; + } + /* We use this frame pointer for alloca + unfortunately we need to assume its gpr11 + otherwise we would need a smarter prologue + walker. */ + if (!frame_pointer_found && regidx == 0xb) + { + frame_pointer_regidx = 0xb; + frame_pointer_found = 1; + if (fextra_info) + fextra_info->frame_pointer_saved_pc = test_pc; + valid_prologue = 1; + continue; + } + } + /* Check for AHI or AGHI gpr15,val */ + if (save_link_state == 1 && (instr[0] == 0xa7) && + ((GDB_TARGET_IS_ESAME && (instr[1] == 0xfb)) || (instr[1] == 0xfa))) + { + if (fextra_info) + fextra_info->stack_bought = + -extract_signed_integer (&instr[2], 2); + save_link_state = 3; + valid_prologue = 1; + continue; + } + /* Alternatively check for the complex construction for + buying more than 32k of stack + BRAS gprx,.+8 + long vals %r15,0(%gprx) gprx currently r1 */ + if ((save_link_state == 1) && (instr[0] == 0xa7) + && ((instr[1] & 0xf) == 0x5) && (instr[2] == 0) + && (instr[3] == 0x4) && ((instr[1] >> 4) != CONST_POOL_REGIDX)) + { + subtract_sp_regidx = instr[1] >> 4; + save_link_state = 2; + if (fextra_info) + target_read_memory (test_pc + instrlen, + (char *) &fextra_info->stack_bought, + sizeof (fextra_info->stack_bought)); + test_pc += 4; + valid_prologue = 1; + continue; + } + if (save_link_state == 2 && instr[0] == 0x5b + && instr[1] == 0xf0 && + instr[2] == (subtract_sp_regidx << 4) && instr[3] == 0) + { + save_link_state = 3; + valid_prologue = 1; + continue; + } + /* check for LA gprx,offset(15) used for varargs */ + if ((instr[0] == 0x41) && ((instr[2] >> 4) == 0xf) && + ((instr[1] & 0xf) == 0)) + { + /* some code uses gpr7 to point to outgoing args */ + if (((instr[1] >> 4) == 7) && (save_link_state == 0) && + ((instr[2] & 0xf) == 0) + && (instr[3] == S390_STACK_FRAME_OVERHEAD)) + { + valid_prologue = 1; + continue; + } + if (varargs_state == 1) + { + varargs_state = 2; + valid_prologue = 1; + continue; + } + } + /* Check for a GOT load */ + + if (GDB_TARGET_IS_ESAME) + { + /* Check for larl GOT_REGIDX, on ESAME */ + if ((got_state == 0) && (instr[0] == 0xc0) + && (instr[1] == (GOT_REGIDX << 4))) + { + got_state = 2; + valid_prologue = 1; + continue; + } + } + else + { + /* check for l GOT_REGIDX,x(CONST_POOL_REGIDX) */ + if (got_state == 0 && const_pool_state == 2 && instr[0] == 0x58 + && (instr[2] == (CONST_POOL_REGIDX << 4)) + && ((instr[1] >> 4) == GOT_REGIDX)) + { + got_state == 1; + valid_prologue = 1; + continue; + } + /* Check for subsequent ar got_regidx,basr_regidx */ + if (got_state == 1 && instr[0] == 0x1a && + instr[1] == ((GOT_REGIDX << 4) | CONST_POOL_REGIDX)) + { + got_state = 2; + valid_prologue = 1; + continue; + } + } + } + while (valid_prologue && good_prologue); + if (good_prologue) + { + good_prologue = (((got_state == 0) || (got_state == 2)) && + ((const_pool_state == 0) || (const_pool_state == 2)) && + ((save_link_state == 0) || (save_link_state == 4)) && + ((varargs_state == 0) || (varargs_state == 2))); + } + if (fextra_info) + { + fextra_info->good_prologue = good_prologue; + fextra_info->skip_prologue_function_start = + (good_prologue ? test_pc : pc); + } + return err; +} + + +int +s390_check_function_end (CORE_ADDR pc) +{ + bfd_byte instr[S390_MAX_INSTR_SIZE]; + disassemble_info info; + int regidx, instrlen; + + info.read_memory_func = dis_asm_read_memory; + instrlen = s390_readinstruction (instr, pc, &info); + if (instrlen < 0) + return -1; + /* check for BR */ + if (instrlen != 2 || instr[0] != 07 || (instr[1] >> 4) != 0xf) + return 0; + regidx = instr[1] & 0xf; + /* Check for LMG or LG */ + instrlen = + s390_readinstruction (instr, pc - (GDB_TARGET_IS_ESAME ? 6 : 4), &info); + if (instrlen < 0) + return -1; + if (GDB_TARGET_IS_ESAME) + { + + if (instrlen != 6 || instr[0] != 0xeb || instr[5] != 0x4) + return 0; + } + else if (instrlen != 4 || instr[0] != 0x98) + { + return 0; + } + if ((instr[2] >> 4) != 0xf) + return 0; + if (regidx == 14) + return 1; + instrlen = s390_readinstruction (instr, pc - (GDB_TARGET_IS_ESAME ? 12 : 8), + &info); + if (instrlen < 0) + return -1; + if (GDB_TARGET_IS_ESAME) + { + /* Check for LG */ + if (instrlen != 6 || instr[0] != 0xe3 || instr[5] != 0x4) + return 0; + } + else + { + /* Check for L */ + if (instrlen != 4 || instr[0] != 0x58) + return 0; + } + if (instr[2] >> 4 != 0xf) + return 0; + if (instr[1] >> 4 != regidx) + return 0; + return 1; +} + +static CORE_ADDR +s390_sniff_pc_function_start (CORE_ADDR pc, struct frame_info *fi) +{ + CORE_ADDR function_start, test_function_start; + int loop_cnt, err, function_end; + struct frame_extra_info fextra_info; + function_start = get_pc_function_start (pc); + + if (function_start == 0) + { + test_function_start = pc; + if (test_function_start & 1) + return 0; /* This has to be bogus */ + loop_cnt = 0; + do + { + + err = + s390_get_frame_info (test_function_start, &fextra_info, fi, 1); + loop_cnt++; + test_function_start -= 2; + function_end = s390_check_function_end (test_function_start); + } + while (!(function_end == 1 || err || loop_cnt >= 4096 || + (fextra_info.good_prologue))); + if (fextra_info.good_prologue) + function_start = fextra_info.function_start; + else if (function_end == 1) + function_start = test_function_start; + } + return function_start; +} + + + +CORE_ADDR +s390_function_start (struct frame_info *fi) +{ + CORE_ADDR function_start = 0; + + if (fi->extra_info && fi->extra_info->initialised) + function_start = fi->extra_info->function_start; + else if (fi->pc) + function_start = get_pc_function_start (fi->pc); + return function_start; +} + + + + +int +s390_frameless_function_invocation (struct frame_info *fi) +{ + struct frame_extra_info fextra_info, *fextra_info_ptr; + int frameless = 0; + + if (fi->next == NULL) /* no may be frameless */ + { + if (fi->extra_info) + fextra_info_ptr = fi->extra_info; + else + { + fextra_info_ptr = &fextra_info; + s390_get_frame_info (s390_sniff_pc_function_start (fi->pc, fi), + fextra_info_ptr, fi, 1); + } + frameless = ((fextra_info_ptr->stack_bought == 0)); + } + return frameless; + +} + + +static int +s390_is_sigreturn (CORE_ADDR pc, struct frame_info *sighandler_fi, + CORE_ADDR *sregs, CORE_ADDR *sigcaller_pc) +{ + bfd_byte instr[S390_MAX_INSTR_SIZE]; + disassemble_info info; + int instrlen; + CORE_ADDR scontext; + int retval = 0; + CORE_ADDR orig_sp; + CORE_ADDR temp_sregs; + + scontext = temp_sregs = 0; + + info.read_memory_func = dis_asm_read_memory; + instrlen = s390_readinstruction (instr, pc, &info); + if (sigcaller_pc) + *sigcaller_pc = 0; + if (((instrlen == S390_SYSCALL_SIZE) && + (instr[0] == S390_SYSCALL_OPCODE)) && + ((instr[1] == s390_NR_sigreturn) || (instr[1] == s390_NR_rt_sigreturn))) + { + if (sighandler_fi) + { + if (s390_frameless_function_invocation (sighandler_fi)) + orig_sp = sighandler_fi->frame; + else + orig_sp = ADDR_BITS_REMOVE ((CORE_ADDR) + read_memory_integer (sighandler_fi-> + frame, + S390_GPR_SIZE)); + if (orig_sp && sigcaller_pc) + { + scontext = orig_sp + S390_SIGNAL_FRAMESIZE; + if (pc == scontext && instr[1] == s390_NR_rt_sigreturn) + { + /* We got a new style rt_signal */ + /* get address of read ucontext->uc_mcontext */ + temp_sregs = orig_sp + (GDB_TARGET_IS_ESAME ? + S390X_UC_MCONTEXT_OFFSET : + S390_UC_MCONTEXT_OFFSET); + } + else + { + /* read sigcontext->sregs */ + temp_sregs = ADDR_BITS_REMOVE ((CORE_ADDR) + read_memory_integer (scontext + + + (GDB_TARGET_IS_ESAME + ? + S390X_SIGCONTEXT_SREGS_OFFSET + : + S390_SIGCONTEXT_SREGS_OFFSET), + S390_GPR_SIZE)); + + } + /* read sigregs->psw.addr */ + *sigcaller_pc = + ADDR_BITS_REMOVE ((CORE_ADDR) + read_memory_integer (temp_sregs + + REGISTER_BYTE + (S390_PC_REGNUM), + S390_PSW_ADDR_SIZE)); + } + } + retval = 1; + } + if (sregs) + *sregs = temp_sregs; + return retval; +} + +/* + We need to do something better here but this will keep us out of trouble + for the moment. + For some reason the blockframe.c calls us with fi->next->fromleaf + so this seems of little use to us. */ +void +s390_init_frame_pc_first (int next_fromleaf, struct frame_info *fi) +{ + CORE_ADDR sigcaller_pc; + + fi->pc = 0; + if (next_fromleaf) + { + fi->pc = ADDR_BITS_REMOVE (read_register (S390_RETADDR_REGNUM)); + /* fix signal handlers */ + } + else if (fi->next && fi->next->pc) + fi->pc = s390_frame_saved_pc_nofix (fi->next); + if (fi->pc && fi->next && fi->next->frame && + s390_is_sigreturn (fi->pc, fi->next, NULL, &sigcaller_pc)) + { + fi->pc = sigcaller_pc; + } + +} + +void +s390_init_extra_frame_info (int fromleaf, struct frame_info *fi) +{ + fi->extra_info = frame_obstack_alloc (sizeof (struct frame_extra_info)); + if (fi->pc) + s390_get_frame_info (s390_sniff_pc_function_start (fi->pc, fi), + fi->extra_info, fi, 1); + else + s390_memset_extra_info (fi->extra_info); +} + +/* If saved registers of frame FI are not known yet, read and cache them. + &FEXTRA_INFOP contains struct frame_extra_info; TDATAP can be NULL, + in which case the framedata are read. */ + +void +s390_frame_init_saved_regs (struct frame_info *fi) +{ + + int quick; + + if (fi->saved_regs == NULL) + { + /* zalloc memsets the saved regs */ + frame_saved_regs_zalloc (fi); + if (fi->pc) + { + quick = (fi->extra_info && fi->extra_info->initialised + && fi->extra_info->good_prologue); + s390_get_frame_info (quick ? fi->extra_info->function_start : + s390_sniff_pc_function_start (fi->pc, fi), + fi->extra_info, fi, !quick); + } + } +} + + + +CORE_ADDR +s390_frame_args_address (struct frame_info *fi) +{ + + /* Apparently gdb already knows gdb_args_offset itself */ + return fi->frame; +} + + +static CORE_ADDR +s390_frame_saved_pc_nofix (struct frame_info *fi) +{ + if (fi->extra_info && fi->extra_info->saved_pc_valid) + return fi->extra_info->saved_pc; + s390_frame_init_saved_regs (fi); + if (fi->extra_info) + { + fi->extra_info->saved_pc_valid = 1; + if (fi->extra_info->good_prologue) + { + if (fi->saved_regs[S390_RETADDR_REGNUM]) + { + return (fi->extra_info->saved_pc = + ADDR_BITS_REMOVE (read_memory_integer + (fi->saved_regs[S390_RETADDR_REGNUM], + S390_GPR_SIZE))); + } + } + } + return 0; +} + +CORE_ADDR +s390_frame_saved_pc (struct frame_info *fi) +{ + CORE_ADDR saved_pc = 0, sig_pc; + + if (fi->extra_info && fi->extra_info->sig_fixed_saved_pc_valid) + return fi->extra_info->sig_fixed_saved_pc; + saved_pc = s390_frame_saved_pc_nofix (fi); + + if (fi->extra_info) + { + fi->extra_info->sig_fixed_saved_pc_valid = 1; + if (saved_pc) + { + if (s390_is_sigreturn (saved_pc, fi, NULL, &sig_pc)) + saved_pc = sig_pc; + } + fi->extra_info->sig_fixed_saved_pc = saved_pc; + } + return saved_pc; +} + + + + +/* We want backtraces out of signal handlers so we don't + set thisframe->signal_handler_caller to 1 */ + +CORE_ADDR +s390_frame_chain (struct frame_info *thisframe) +{ + CORE_ADDR prev_fp = 0; + + if (thisframe->prev && thisframe->prev->frame) + prev_fp = thisframe->prev->frame; + else + { + int sigreturn = 0; + CORE_ADDR sregs = 0; + struct frame_extra_info prev_fextra_info; + + memset (&prev_fextra_info, 0, sizeof (prev_fextra_info)); + if (thisframe->pc) + { + CORE_ADDR saved_pc, sig_pc; + + saved_pc = s390_frame_saved_pc_nofix (thisframe); + if (saved_pc) + { + if ((sigreturn = + s390_is_sigreturn (saved_pc, thisframe, &sregs, &sig_pc))) + saved_pc = sig_pc; + s390_get_frame_info (s390_sniff_pc_function_start + (saved_pc, NULL), &prev_fextra_info, NULL, + 1); + } + } + if (sigreturn) + { + /* read sigregs,regs.gprs[11 or 15] */ + prev_fp = read_memory_integer (sregs + + REGISTER_BYTE (S390_GP0_REGNUM + + (prev_fextra_info. + frame_pointer_saved_pc + ? 11 : 15)), + S390_GPR_SIZE); + thisframe->extra_info->sigcontext = sregs; + } + else + { + if (thisframe->saved_regs) + { + + int regno; + + regno = + ((prev_fextra_info.frame_pointer_saved_pc + && thisframe-> + saved_regs[S390_FRAME_REGNUM]) ? S390_FRAME_REGNUM : + S390_SP_REGNUM); + if (thisframe->saved_regs[regno]) + prev_fp = + read_memory_integer (thisframe->saved_regs[regno], + S390_GPR_SIZE); + } + } + } + return ADDR_BITS_REMOVE (prev_fp); +} + +/* + Whether struct frame_extra_info is actually needed I'll have to figure + out as our frames are similar to rs6000 there is a possibility + i386 dosen't need it. */ + + + +/* a given return value in `regbuf' with a type `valtype', extract and copy its + value into `valbuf' */ +void +s390_extract_return_value (struct type *valtype, char *regbuf, char *valbuf) +{ + /* floats and doubles are returned in fpr0. fpr's have a size of 8 bytes. + We need to truncate the return value into float size (4 byte) if + necessary. */ + int len = TYPE_LENGTH (valtype); + + if (TYPE_CODE (valtype) == TYPE_CODE_FLT) + { + if (len > (TARGET_FLOAT_BIT >> 3)) + memcpy (valbuf, ®buf[REGISTER_BYTE (S390_FP0_REGNUM)], len); + else + { + /* float */ + DOUBLEST val; + + floatformat_to_doublest (&floatformat_ieee_double_big, + ®buf[REGISTER_BYTE (S390_FP0_REGNUM)], + &val); + store_floating (valbuf, len, val); + } + } + else + { + int offset = 0; + /* return value is copied starting from r2. */ + if (TYPE_LENGTH (valtype) < S390_GPR_SIZE) + offset = S390_GPR_SIZE - TYPE_LENGTH (valtype); + memcpy (valbuf, + regbuf + REGISTER_BYTE (S390_GP0_REGNUM + 2) + offset, + TYPE_LENGTH (valtype)); + } +} + + +static char * +s390_promote_integer_argument (struct type *valtype, char *valbuf, + char *reg_buff, int *arglen) +{ + char *value = valbuf; + int len = TYPE_LENGTH (valtype); + + if (len < S390_GPR_SIZE) + { + /* We need to upgrade this value to a register to pass it correctly */ + int idx, diff = S390_GPR_SIZE - len, negative = + (!TYPE_UNSIGNED (valtype) && value[0] & 0x80); + for (idx = 0; idx < S390_GPR_SIZE; idx++) + { + reg_buff[idx] = (idx < diff ? (negative ? 0xff : 0x0) : + value[idx - diff]); + } + value = reg_buff; + *arglen = S390_GPR_SIZE; + } + else + { + if (len & (S390_GPR_SIZE - 1)) + { + fprintf_unfiltered (gdb_stderr, + "s390_promote_integer_argument detected an argument not " + "a multiple of S390_GPR_SIZE & greater than S390_GPR_SIZE " + "we might not deal with this correctly.\n"); + } + *arglen = len; + } + + return (value); +} + +void +s390_store_return_value (struct type *valtype, char *valbuf) +{ + int arglen; + char *reg_buff = alloca (max (S390_FPR_SIZE, REGISTER_SIZE)), *value; + + if (TYPE_CODE (valtype) == TYPE_CODE_FLT) + { + DOUBLEST tempfloat = extract_floating (valbuf, TYPE_LENGTH (valtype)); + + floatformat_from_doublest (&floatformat_ieee_double_big, &tempfloat, + reg_buff); + write_register_bytes (REGISTER_BYTE (S390_FP0_REGNUM), reg_buff, + S390_FPR_SIZE); + } + else + { + value = + s390_promote_integer_argument (valtype, valbuf, reg_buff, &arglen); + /* Everything else is returned in GPR2 and up. */ + write_register_bytes (REGISTER_BYTE (S390_GP0_REGNUM + 2), value, + arglen); + } +} +static int +gdb_print_insn_s390 (bfd_vma memaddr, disassemble_info * info) +{ + bfd_byte instrbuff[S390_MAX_INSTR_SIZE]; + int instrlen, cnt; + + instrlen = s390_readinstruction (instrbuff, (CORE_ADDR) memaddr, info); + if (instrlen < 0) + { + (*info->memory_error_func) (instrlen, memaddr, info); + return -1; + } + for (cnt = 0; cnt < instrlen; cnt++) + info->fprintf_func (info->stream, "%02X ", instrbuff[cnt]); + for (cnt = instrlen; cnt < S390_MAX_INSTR_SIZE; cnt++) + info->fprintf_func (info->stream, " "); + instrlen = print_insn_s390 (memaddr, info); + return instrlen; +} + + + +/* Not the most efficent code in the world */ +int +s390_fp_regnum () +{ + int regno = S390_SP_REGNUM; + struct frame_extra_info fextra_info; + + CORE_ADDR pc = ADDR_BITS_REMOVE (read_register (S390_PC_REGNUM)); + + s390_get_frame_info (s390_sniff_pc_function_start (pc, NULL), &fextra_info, + NULL, 1); + if (fextra_info.frame_pointer_saved_pc) + regno = S390_FRAME_REGNUM; + return regno; +} + +CORE_ADDR +s390_read_fp () +{ + return read_register (s390_fp_regnum ()); +} + + +void +s390_write_fp (CORE_ADDR val) +{ + write_register (s390_fp_regnum (), val); +} + + +void +s390_push_dummy_frame () +{ + CORE_ADDR orig_sp = read_register (S390_SP_REGNUM), new_sp; + void *saved_regs = alloca (REGISTER_BYTES); + + new_sp = (orig_sp - (REGISTER_BYTES + S390_GPR_SIZE)); + read_register_bytes (0, (char *) saved_regs, REGISTER_BYTES); + /* Use saved copy instead of orig_sp as this will have the correct endianness */ + write_memory (new_sp, (char *) saved_regs + REGISTER_BYTE (S390_SP_REGNUM), + S390_GPR_SIZE); + write_memory (new_sp + S390_GPR_SIZE, (char *) &saved_regs, REGISTER_BYTES); + write_register (S390_SP_REGNUM, new_sp); +} + +/* pop the innermost frame, go back to the caller. + Used in `call_function_by_hand' to remove an artificial stack + frame. */ +void +s390_pop_frame () +{ + CORE_ADDR new_sp = read_register (S390_SP_REGNUM), orig_sp; + void *saved_regs = alloca (REGISTER_BYTES); + + + read_memory (new_sp + S390_GPR_SIZE, (char *) saved_regs, REGISTER_BYTES); + write_register_bytes (0, (char *) &saved_regs, REGISTER_BYTES); +} + +/* used by call function by hand + struct_return indicates that this function returns a structure & + therefore gpr2 stores a pointer to the structure to be returned as + opposed to the first argument. + Currently I haven't seen a TYPE_CODE_INT whose size wasn't 2^n or less + than S390_GPR_SIZE this is good because I don't seem to have to worry + about sign extending pushed arguments (i.e. a signed char currently + comes into this code with a size of 4 ). */ + +CORE_ADDR +s390_push_arguments (int nargs, value_ptr *args, CORE_ADDR sp, + int struct_return, CORE_ADDR struct_addr) +{ + int num_float_args, num_gpr_args, orig_num_gpr_args, argno; + int second_pass, len, arglen, gprs_required; + CORE_ADDR outgoing_args_ptr, outgoing_args_space; + value_ptr arg; + struct type *type; + int max_num_gpr_args = 5 - (struct_return ? 1 : 0); + int arg0_regnum = S390_GP0_REGNUM + 2 + (struct_return ? 1 : 0); + char *reg_buff = alloca (max (S390_FPR_SIZE, REGISTER_SIZE)), *value; + + for (second_pass = 0; second_pass <= 1; second_pass++) + { + if (second_pass) + outgoing_args_ptr = sp + S390_STACK_FRAME_OVERHEAD; + else + outgoing_args_ptr = 0; + num_float_args = 0; + num_gpr_args = 0; + for (argno = 0; argno < nargs; argno++) + { + arg = args[argno]; + type = check_typedef (VALUE_TYPE (arg)); + len = TYPE_LENGTH (type); + if (TYPE_CODE (type) == TYPE_CODE_FLT) + { + int all_float_registers_used = + num_float_args > (GDB_TARGET_IS_ESAME ? 3 : 1); + + if (second_pass) + { + DOUBLEST tempfloat = + extract_floating (VALUE_CONTENTS (arg), len); + + + floatformat_from_doublest (all_float_registers_used && + len == (TARGET_FLOAT_BIT >> 3) + ? &floatformat_ieee_single_big + : &floatformat_ieee_double_big, + &tempfloat, reg_buff); + if (all_float_registers_used) + write_memory (outgoing_args_ptr, reg_buff, len); + else + write_register_bytes (REGISTER_BYTE ((S390_FP0_REGNUM) + + + (2 * + num_float_args)), + reg_buff, S390_FPR_SIZE); + } + if (all_float_registers_used) + outgoing_args_ptr += len; + num_float_args++; + } + else + { + gprs_required = ((len + (S390_GPR_SIZE - 1)) / S390_GPR_SIZE); + + value = + s390_promote_integer_argument (type, VALUE_CONTENTS (arg), + reg_buff, &arglen); + + orig_num_gpr_args = num_gpr_args; + num_gpr_args += gprs_required; + if (num_gpr_args > max_num_gpr_args) + { + if (second_pass) + write_memory (outgoing_args_ptr, value, arglen); + outgoing_args_ptr += arglen; + } + else + { + if (second_pass) + write_register_bytes (REGISTER_BYTE (arg0_regnum) + + + (orig_num_gpr_args * S390_GPR_SIZE), + value, arglen); + } + } + } + if (!second_pass) + { + outgoing_args_space = outgoing_args_ptr; + /* Align to 16 bytes because because I like alignment & + some of the kernel code requires 8 byte stack alignment at least. */ + sp = (sp - (S390_STACK_FRAME_OVERHEAD + outgoing_args_ptr)) & (-16); + } + + } + return sp; + +} + +void +s390_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs, + struct value **args, struct type *value_type, + int using_gcc) +{ + store_unsigned_integer (dummy + 4, REGISTER_SIZE, fun); +} + + +/* Return the GDB type object for the "standard" data type + of data in register N. */ +struct type * +s390_register_virtual_type (int regno) +{ + return ((unsigned) regno - S390_FPC_REGNUM) < + S390_NUM_FPRS ? builtin_type_double : builtin_type_int; +} + + +struct type * +s390x_register_virtual_type (int regno) +{ + return (regno == S390_FPC_REGNUM) || + (regno >= S390_FIRST_ACR && regno <= S390_LAST_ACR) ? builtin_type_int : + (regno >= S390_FP0_REGNUM) ? builtin_type_double : builtin_type_long; +} + + + +void +s390_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) +{ + write_register (S390_GP0_REGNUM + 2, addr); +} + + + +static unsigned char * +s390_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) +{ + static unsigned char breakpoint[] = { 0x0, 0x1 }; + + *lenptr = sizeof (breakpoint); + return breakpoint; +} + +/* Advance PC across any function entry prologue instructions to reach some + "real" code. */ +CORE_ADDR +s390_skip_prologue (CORE_ADDR pc) +{ + struct frame_extra_info fextra_info; + + s390_get_frame_info (pc, &fextra_info, NULL, 1); + return fextra_info.skip_prologue_function_start; +} + +/* pc_in_call_dummy_on stack may work for us must test this */ +int +s390_pc_in_call_dummy (CORE_ADDR pc, CORE_ADDR sp, CORE_ADDR frame_address) +{ + return pc > sp && pc < (sp + 4096); +} + +/* Immediately after a function call, return the saved pc. + Can't go through the frames for this because on some machines + the new frame is not set up until the new function executes + some instructions. */ +CORE_ADDR +s390_saved_pc_after_call (struct frame_info *frame) +{ + return ADDR_BITS_REMOVE (read_register (S390_RETADDR_REGNUM)); +} + +static CORE_ADDR +s390_addr_bits_remove (CORE_ADDR addr) +{ + return (addr) & 0x7fffffff; +} + + +static CORE_ADDR +s390_push_return_address (CORE_ADDR pc, CORE_ADDR sp) +{ + return sp; +} + +struct gdbarch * +s390_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) +{ + + /* instruction sequence for s390 call dummy is as follows + bras %r1,.+8 ; 0xA7150004 + long basraddr ; 0x00000000 + l %r1,0(%r1) ; 0x58101000 + basr %r14,%r1 ; 0x0DE1 + breakpoint ; 0x0001 */ + static LONGEST s390_call_dummy_words[] = { 0xA7150004, 0x00000000, + 0x58101000, 0x0DE10001 + }; + /* instruction sequence for esame call dummy is as follows + bras %r1,.+12 ; 0xA7150006 + long basraddr ; 0x0000000000000000 + lg %r1,0(%r1) ; 0xE31010000004 + basr %r14,%r1 ; 0x0DE1 + breakpoint ; 0x0001 */ + static LONGEST s390x_call_dummy_words[] = { 0xA715000600000000, + 0x00000000E3101000, + 0x00040DE100010000 + }; + struct gdbarch *gdbarch; + struct gdbarch_tdep *tdep; + int elf_flags; + + /* First see if there is already a gdbarch that can satisfy the request. */ + arches = gdbarch_list_lookup_by_info (arches, &info); + if (arches != NULL) + return arches->gdbarch; + + /* None found: is the request for a s390 architecture? */ + if (info.bfd_arch_info->arch != bfd_arch_s390) + return NULL; /* No; then it's not for us. */ + + /* Yes: create a new gdbarch for the specified machine type. */ + gdbarch = gdbarch_alloc (&info, NULL); + + set_gdbarch_believe_pcc_promotion (gdbarch, 0); + + /* We don't define set_gdbarch_call_dummy_breakpoint_offset + as we already have a breakpoint inserted. */ + set_gdbarch_use_generic_dummy_frames (gdbarch, 0); + + set_gdbarch_call_dummy_location (gdbarch, ON_STACK); + set_gdbarch_call_dummy_start_offset (gdbarch, 0); + set_gdbarch_pc_in_call_dummy (gdbarch, s390_pc_in_call_dummy); + set_gdbarch_frame_args_skip (gdbarch, 0); + set_gdbarch_frame_args_address (gdbarch, s390_frame_args_address); + set_gdbarch_frame_chain (gdbarch, s390_frame_chain); + set_gdbarch_frame_init_saved_regs (gdbarch, s390_frame_init_saved_regs); + set_gdbarch_frame_locals_address (gdbarch, s390_frame_args_address); + /* We can't do this */ + set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); + set_gdbarch_store_struct_return (gdbarch, s390_store_struct_return); + set_gdbarch_extract_return_value (gdbarch, s390_extract_return_value); + set_gdbarch_store_return_value (gdbarch, s390_store_return_value); + /* Amount PC must be decremented by after a breakpoint. + This is often the number of bytes in BREAKPOINT + but not always. */ + set_gdbarch_decr_pc_after_break (gdbarch, 2); + set_gdbarch_pop_frame (gdbarch, s390_pop_frame); + set_gdbarch_push_dummy_frame (gdbarch, s390_push_dummy_frame); + set_gdbarch_push_arguments (gdbarch, s390_push_arguments); + set_gdbarch_ieee_float (gdbarch, 1); + /* Stack grows downward. */ + set_gdbarch_inner_than (gdbarch, core_addr_lessthan); + /* Offset from address of function to start of its code. + Zero on most machines. */ + set_gdbarch_function_start_offset (gdbarch, 0); + set_gdbarch_max_register_raw_size (gdbarch, 8); + set_gdbarch_max_register_virtual_size (gdbarch, 8); + set_gdbarch_breakpoint_from_pc (gdbarch, s390_breakpoint_from_pc); + set_gdbarch_skip_prologue (gdbarch, s390_skip_prologue); + set_gdbarch_init_extra_frame_info (gdbarch, s390_init_extra_frame_info); + set_gdbarch_init_frame_pc_first (gdbarch, s390_init_frame_pc_first); + set_gdbarch_read_fp (gdbarch, s390_read_fp); + set_gdbarch_write_fp (gdbarch, s390_write_fp); + /* This function that tells us whether the function invocation represented + by FI does not have a frame on the stack associated with it. If it + does not, FRAMELESS is set to 1, else 0. */ + set_gdbarch_frameless_function_invocation (gdbarch, + s390_frameless_function_invocation); + /* Return saved PC from a frame */ + set_gdbarch_frame_saved_pc (gdbarch, s390_frame_saved_pc); + /* FRAME_CHAIN takes a frame's nominal address + and produces the frame's chain-pointer. */ + set_gdbarch_frame_chain (gdbarch, s390_frame_chain); + set_gdbarch_saved_pc_after_call (gdbarch, s390_saved_pc_after_call); + set_gdbarch_register_byte (gdbarch, s390_register_byte); + set_gdbarch_pc_regnum (gdbarch, S390_PC_REGNUM); + set_gdbarch_sp_regnum (gdbarch, S390_SP_REGNUM); + set_gdbarch_fp_regnum (gdbarch, S390_FP_REGNUM); + set_gdbarch_fp0_regnum (gdbarch, S390_FP0_REGNUM); + set_gdbarch_num_regs (gdbarch, S390_NUM_REGS); + set_gdbarch_cannot_fetch_register (gdbarch, s390_cannot_fetch_register); + set_gdbarch_cannot_store_register (gdbarch, s390_cannot_fetch_register); + set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register); + set_gdbarch_use_struct_convention (gdbarch, generic_use_struct_convention); + set_gdbarch_frame_chain_valid (gdbarch, file_frame_chain_valid); + set_gdbarch_register_name (gdbarch, s390_register_name); + set_gdbarch_stab_reg_to_regnum (gdbarch, s390_stab_reg_to_regnum); + set_gdbarch_dwarf_reg_to_regnum (gdbarch, s390_stab_reg_to_regnum); + set_gdbarch_dwarf2_reg_to_regnum (gdbarch, s390_stab_reg_to_regnum); + set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); + + /* Stuff below here wouldn't be required if gdbarch.sh was a little */ + /* more intelligent */ + set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 0); + set_gdbarch_call_dummy_p (gdbarch, 1); + set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); + set_gdbarch_extract_struct_value_address (gdbarch, 0); + set_gdbarch_fix_call_dummy (gdbarch, s390_fix_call_dummy); +#ifdef GDB_NM_FILE + set_gdbarch_prepare_to_proceed (gdbarch, linuxthreads_prepare_to_proceed); +#endif + set_gdbarch_push_return_address (gdbarch, s390_push_return_address); + + switch (info.bfd_arch_info->mach) + { + case bfd_mach_s390_esa: + set_gdbarch_register_size (gdbarch, 4); + set_gdbarch_call_dummy_length (gdbarch, 16); + set_gdbarch_register_raw_size (gdbarch, s390_register_raw_size); + set_gdbarch_register_virtual_size (gdbarch, s390_register_raw_size); + set_gdbarch_register_virtual_type (gdbarch, s390_register_virtual_type); + + set_gdbarch_addr_bits_remove (gdbarch, s390_addr_bits_remove); + + set_gdbarch_sizeof_call_dummy_words (gdbarch, + sizeof (s390_call_dummy_words)); + set_gdbarch_call_dummy_words (gdbarch, s390_call_dummy_words); + set_gdbarch_register_bytes (gdbarch, S390_REGISTER_BYTES); + break; + case bfd_mach_s390_esame: + set_gdbarch_register_size (gdbarch, 8); + set_gdbarch_call_dummy_length (gdbarch, 22); + set_gdbarch_register_raw_size (gdbarch, s390x_register_raw_size); + set_gdbarch_register_virtual_size (gdbarch, s390x_register_raw_size); + set_gdbarch_register_virtual_type (gdbarch, + s390x_register_virtual_type); + + set_gdbarch_long_bit (gdbarch, 64); + set_gdbarch_long_long_bit (gdbarch, 64); + set_gdbarch_ptr_bit (gdbarch, 64); + set_gdbarch_sizeof_call_dummy_words (gdbarch, + sizeof (s390x_call_dummy_words)); + set_gdbarch_call_dummy_words (gdbarch, s390x_call_dummy_words); + set_gdbarch_register_bytes (gdbarch, S390X_REGISTER_BYTES); + break; + } + + return gdbarch; +} + + + +void +_initialize_s390_tdep () +{ + + /* Hook us into the gdbarch mechanism. */ + register_gdbarch_init (bfd_arch_s390, s390_gdbarch_init); + if (!tm_print_insn) /* Someone may have already set it */ + tm_print_insn = gdb_print_insn_s390; +} + +#endif /* GDBSERVER */ |