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qemu-e2k/target/e2k/gdbstub.c

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/*
* Elbrus 2000 gdb server stub
*
* Copyright (c) 2003-2005 Fabrice Bellard
* Copyright (c) 2013 SUSE LINUX Products GmbH
* Copyright (c) 2020 Alibek Omarov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/timer.h"
#include "cpu.h"
#include "exec/gdbstub.h"
/* TODO: reverse engineer e2k-linux-gdb register ids */
static uint64_t cr_read(CPUState *cs, CPUE2KState *env, size_t offset)
{
target_ulong addr = env->pcsp.base + env->pcsp.index + offset;
uint64_t r;
cpu_memory_rw_debug(cs, addr, &r, sizeof(r), false);
return r;
}
int e2k_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
E2KCPU *cpu = E2K_CPU(cs);
// CPUClass *cc = CPU_GET_CLASS(cs);
CPUE2KState *env = &cpu->env;
switch (n) {
case 0: return gdb_get_reg64(mem_buf, 0); // unk
case 1: return gdb_get_reg64(mem_buf, 0); // b0
case 2: return gdb_get_reg64(mem_buf, 0); // b1
default: break;
}
if (3 <= n && n < 35) {
return gdb_get_reg64(mem_buf, env->regs[E2K_NR_COUNT + n - 3]);
}
switch (n) {
case 35: return gdb_get_reg64(mem_buf, 0); // psr
case 36: return gdb_get_reg64(mem_buf, env->upsr); // upsr
case 37: return gdb_get_reg64(mem_buf, 0); // oscud_lo
case 38: return gdb_get_reg64(mem_buf, 0); // oscud_hi
case 39: return gdb_get_reg64(mem_buf, 0); // osgd_lo
case 40: return gdb_get_reg64(mem_buf, 0); // osgd_hi
case 41: return gdb_get_reg64(mem_buf, 0); // osem
case 42: return gdb_get_reg64(mem_buf, 0); // osr0
case 43: return gdb_get_reg64(mem_buf, 0); // pfpfr
case 44: return gdb_get_reg64(mem_buf, 0); // fpcr
case 45: return gdb_get_reg64(mem_buf, 0); // fpsr
case 46: return gdb_get_reg64(mem_buf, 0); // usbr
case 47: return gdb_get_reg64(mem_buf, env->usd.lo); // usd_lo
case 48: return gdb_get_reg64(mem_buf, env->usd.hi); // usd_hi
case 49: return gdb_get_reg64(mem_buf, e2k_state_psp_lo(env)); // psp_lo
case 50: return gdb_get_reg64(mem_buf, e2k_state_psp_hi(env)); // psp_hi
case 51: return gdb_get_reg64(mem_buf, 0); // pshtp
case 52: return gdb_get_reg64(mem_buf, env->pregs); // pregs
case 53: return gdb_get_reg64(mem_buf, env->ip); // ip
case 54: { // cr1_lo
uint64_t cr1_lo = cr_read(cs, env, offsetof(E2KCrs, cr1.lo));
return gdb_get_reg64(mem_buf, cr1_lo);
}
case 55: { // cr1_hi
uint64_t cr1_hi = cr_read(cs, env, offsetof(E2KCrs, cr1.hi));
return gdb_get_reg64(mem_buf, cr1_hi);
}
case 56: return gdb_get_reg64(mem_buf, 0); // cwd
case 57: return gdb_get_reg64(mem_buf, e2k_state_pcsp_lo(env)); // pcsp_lo
case 58: return gdb_get_reg64(mem_buf, e2k_state_pcsp_hi(env)); // pcsp_hi
case 59: return gdb_get_reg64(mem_buf, 0); // pcshtp
case 60: return gdb_get_reg64(mem_buf, 0); // cud_lo
case 61: return gdb_get_reg64(mem_buf, 0); // cud_hi
case 62: return gdb_get_reg64(mem_buf, 0); // gd_lo
case 63: return gdb_get_reg64(mem_buf, 0); // gd_hi
case 64: return gdb_get_reg64(mem_buf, 0); // cs_lo
case 65: return gdb_get_reg64(mem_buf, 0); // cs_hi
case 66: return gdb_get_reg64(mem_buf, 0); // ds_lo
case 67: return gdb_get_reg64(mem_buf, 0); // ds_hi
case 68: return gdb_get_reg64(mem_buf, 0); // es_lo
case 69: return gdb_get_reg64(mem_buf, 0); // es_hi
case 70: return gdb_get_reg64(mem_buf, 0); // fs_lo
case 71: return gdb_get_reg64(mem_buf, 0); // fs_hi
case 72: return gdb_get_reg64(mem_buf, 0); // gs_lo
case 73: return gdb_get_reg64(mem_buf, 0); // gs_hi
case 74: return gdb_get_reg64(mem_buf, 0); // ss_lo
case 75: return gdb_get_reg64(mem_buf, 0); // ss_hi
default:
break;
}
if (76 <= n && n < 140) {
int idx = (n - 76) >> 1;
if (n & 1) {
return gdb_get_reg64(mem_buf, env->aau.ds[idx].hi); // addN_hi
} else {
return gdb_get_reg64(mem_buf, env->aau.ds[idx].lo); // addN_lo
}
}
if (140 <= n && n < 156) {
return gdb_get_reg64(mem_buf, env->aau.inds[n - 140]); // aaindN
}
if (156 <= n && n < 164) {
return gdb_get_reg64(mem_buf, env->aau.incrs[n - 156]); // aaincrN
}
if (164 <= n && n < 196) {
return gdb_get_reg64(mem_buf, env->aau.pl.area[n - 164].ldi); // aaldiN
}
if (196 <= n && n < 228) {
return gdb_get_reg64(mem_buf, env->aau.pr.area[n - 196].ldi); // aaldiN
}
if (n == 228) {
return gdb_get_reg64(mem_buf, env->aau.ldv); // aaldv
}
if (229 <= n && n < 293) {
return gdb_get_reg64(mem_buf, env->aau.lda[n - 229].raw); // aaldaN
}
switch (n) {
case 293: return gdb_get_reg64(mem_buf, env->aau.ldm); // aaldm
case 294: return gdb_get_reg64(mem_buf, env->aau.sr.raw); // aasr
case 295: return gdb_get_reg64(mem_buf, env->aau.fstr); // aafstr
default:
break;
}
if (296 <= n && n < 312) {
return gdb_get_reg64(mem_buf, env->aau.stis[n - 296]); // aastiN
}
switch (n) {
case 312: return gdb_get_reg64(mem_buf, cpu_get_host_ticks()); // clkr
case 313: return gdb_get_reg64(mem_buf, 0); // dibcr
case 314: return gdb_get_reg64(mem_buf, 0); // ddbcr
default:
break;
}
if (315 <= n && n < 319) {
return gdb_get_reg64(mem_buf, 0); // dibarN
}
if (319 <= n && n < 323) {
return gdb_get_reg64(mem_buf, 0); // ddbarN
}
switch (n) {
case 323: return gdb_get_reg64(mem_buf, 0); // dimcr
case 324: return gdb_get_reg64(mem_buf, 0); // ddmcr
case 325: return gdb_get_reg64(mem_buf, 0); // dimar0
case 326: return gdb_get_reg64(mem_buf, 0); // dimar1
case 327: return gdb_get_reg64(mem_buf, 0); // ddmar0
case 328: return gdb_get_reg64(mem_buf, 0); // ddmar1
case 329: return gdb_get_reg64(mem_buf, 0); // dibsr
case 330: return gdb_get_reg64(mem_buf, 0); // ddbsr
case 331: return gdb_get_reg64(mem_buf, 0); // dtcr
case 332: return gdb_get_reg64(mem_buf, 0); // dtarf
case 333: return gdb_get_reg64(mem_buf, 0); // dtart
case 334: return gdb_get_reg64(mem_buf, e2k_state_wd(env)); // wd
case 335: return gdb_get_reg64(mem_buf, 0); // unk
case 336: return gdb_get_reg64(mem_buf, 0); // bgr
case 337: return gdb_get_reg64(mem_buf, 0); // unk
case 338: return gdb_get_reg64(mem_buf, 0); // nip
case 339: return gdb_get_reg64(mem_buf, env->ctprs[0].raw); // ctpr1
case 340: return gdb_get_reg64(mem_buf, env->ctprs[1].raw); // ctpr2
case 341: return gdb_get_reg64(mem_buf, env->ctprs[2].raw); // ctpr3
case 342: return gdb_get_reg64(mem_buf, 0); // eir
case 343: return gdb_get_reg64(mem_buf, 0); // tr
case 344: return gdb_get_reg64(mem_buf, 0); // cutd
case 345: return gdb_get_reg64(mem_buf, 0); // cuir
case 346: return gdb_get_reg64(mem_buf, 0); // tsd
case 347: { // lsr
uint64_t lsr = env->lsr;
lsr = deposit64(lsr, LSR_LCNT_OFF, LSR_LCNT_LEN, env->lsr_lcnt);
lsr = deposit64(lsr, LSR_ECNT_OFF, LSR_ECNT_LEN, env->lsr_ecnt);
lsr = deposit64(lsr, LSR_VLC_OFF, 1, env->lsr_vlc);
lsr = deposit64(lsr, LSR_OVER_OFF, 1, env->lsr_over);
lsr = deposit64(lsr, LSR_PCNT_OFF, LSR_PCNT_LEN, env->lsr_pcnt);
lsr = deposit64(lsr, LSR_STRMD_OFF, LSR_STRMD_LEN, env->lsr_strmd);
return gdb_get_reg64(mem_buf, lsr);
}
case 348: return gdb_get_reg64(mem_buf, env->lsr & LSR_ILCR_MASK); // ilcr
default:
break;
}
if (349 <= n && n < 356) {
return gdb_get_reg64(mem_buf, 0); // unk
}
if (356 <= n && n < 360) {
return gdb_get_reg64(mem_buf, 0); // gN tags (tag len is 1 byte)
}
if (360 <= n && n < 368) {
return gdb_get_reg64(mem_buf, 0); // xgN
}
if (n == 368) {
return gdb_get_reg64(mem_buf, 0); // rpr_hi
}
if (n == 369) {
return gdb_get_reg64(mem_buf, 0); // rpr_lo
}
if (370 <= n && n < 389) {
return gdb_get_reg64(mem_buf, 0); // tir_N_lo
}
if (389 <= n && n < 408) {
return gdb_get_reg64(mem_buf, 0); // tir_N_hi
}
if (408 <= n && n < 418) {
return gdb_get_reg64(mem_buf, 0); // trap_cell_addr_N
}
if (418 <= n && n < 428) {
return gdb_get_reg64(mem_buf, 0); // trap_cell_val_N
}
if (n == 428) {
return gdb_get_reg64(mem_buf, 0); // trap_cell_tag_N [0, 7)
}
if (n == 429) {
return gdb_get_reg64(mem_buf, 0); // trap_cell_tag_N [8, 9)
}
if (430 <= n && n < 440) {
return gdb_get_reg64(mem_buf, 0); // trap_cell_info_N
}
if (440 <= n && n < 472) {
return gdb_get_reg64(mem_buf, env->dam[n - 440].raw); // dam_N
}
if (472 <= n && n < 504) {
return gdb_get_reg64(mem_buf, 0); // sbbp_N
}
if (504 <= n && n < 552) {
return gdb_get_reg64(mem_buf, 0); // mlt_N (3 regs)
}
if (n == 552) {
return gdb_get_reg64(mem_buf, env->pcsp.base); // pcsp_base
}
if (n == 553) {
return gdb_get_reg64(mem_buf, env->psp.base); // psp_base
}
if (554 <= n && n < 573) {
return gdb_get_reg64(mem_buf, 0); // unk
}
if (n == 573) {
return gdb_get_reg32(mem_buf, 0); // unk
}
fprintf(stderr, "%s: unknown register %d\n", __FUNCTION__, n);
return 0;
}
int e2k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
{
// E2KCPU *cpu = E2K_CPU(cs);
// CPUClass *cc = CPU_GET_CLASS(cs);
// CPUE2KState *env = &cpu->env;
fprintf(stderr, "%s: unknown register %d\n", __FUNCTION__, n);
// TODO: e2k_cpu_gdb_write_register
return 0;
}
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