| Message ID | 1552645619-18244-6-git-send-email-chihmin.chao@sifive.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | RISC-V: Add gdb xml files and gdbstub support | expand |
On Fri, Mar 15, 2019 at 7:01 AM Chih-Min Chao <chihmin.chao@sifive.com> wrote: > > From: Jim Wilson <jimw@sifive.com> > > The gdb CSR xml file has registers in documentation order, not numerical > order, so we need a table to map the register numbers. This also adds > fairly standard gdb hooks to access xml specified registers. > > notice: > The fpu xml from gdb 8.3 has unused register #, 65 and make first > csr register # become 69. We register extra register on gdb to correct > csr offset calculation > > Signed-off-by: Jim Wilson <jimw@sifive.com> > Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Alistair > --- > target/riscv/cpu.c | 9 +- > target/riscv/cpu.h | 2 + > target/riscv/gdbstub.c | 350 +++++++++++++++++++++++++++++++++++++++++++++++-- > 3 files changed, 349 insertions(+), 12 deletions(-) > > diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c > index cc3ddc0..feea169 100644 > --- a/target/riscv/cpu.c > +++ b/target/riscv/cpu.c > @@ -311,6 +311,8 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp) > return; > } > > + riscv_cpu_register_gdb_regs_for_features(cs); > + > qemu_init_vcpu(cs); > cpu_reset(cs); > > @@ -351,7 +353,12 @@ static void riscv_cpu_class_init(ObjectClass *c, void *data) > cc->synchronize_from_tb = riscv_cpu_synchronize_from_tb; > cc->gdb_read_register = riscv_cpu_gdb_read_register; > cc->gdb_write_register = riscv_cpu_gdb_write_register; > - cc->gdb_num_core_regs = 65; > + cc->gdb_num_core_regs = 33; > +#if defined(TARGET_RISCV32) > + cc->gdb_core_xml_file = "riscv-32bit-cpu.xml"; > +#elif defined(TARGET_RISCV64) > + cc->gdb_core_xml_file = "riscv-64bit-cpu.xml"; > +#endif > cc->gdb_stop_before_watchpoint = true; > cc->disas_set_info = riscv_cpu_disas_set_info; > #ifdef CONFIG_USER_ONLY > diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h > index 4c5de30..9b673de 100644 > --- a/target/riscv/cpu.h > +++ b/target/riscv/cpu.h > @@ -330,6 +330,8 @@ typedef struct { > void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops); > void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops); > > +void riscv_cpu_register_gdb_regs_for_features(CPUState *cs); > + > #include "exec/cpu-all.h" > > #endif /* RISCV_CPU_H */ > diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c > index 3cabb21..dfcdd83 100644 > --- a/target/riscv/gdbstub.c > +++ b/target/riscv/gdbstub.c > @@ -21,6 +21,255 @@ > #include "exec/gdbstub.h" > #include "cpu.h" > > +/* > + * The GDB CSR xml files list them in documentation order, not numerical order, > + * and are missing entries for unnamed CSRs. So we need to map the gdb numbers > + * to the hardware numbers. > + */ > + > +static int csr_register_map[] = { > + CSR_USTATUS, > + CSR_UIE, > + CSR_UTVEC, > + CSR_USCRATCH, > + CSR_UEPC, > + CSR_UCAUSE, > + CSR_UTVAL, > + CSR_UIP, > + CSR_FFLAGS, > + CSR_FRM, > + CSR_FCSR, > + CSR_CYCLE, > + CSR_TIME, > + CSR_INSTRET, > + CSR_HPMCOUNTER3, > + CSR_HPMCOUNTER4, > + CSR_HPMCOUNTER5, > + CSR_HPMCOUNTER6, > + CSR_HPMCOUNTER7, > + CSR_HPMCOUNTER8, > + CSR_HPMCOUNTER9, > + CSR_HPMCOUNTER10, > + CSR_HPMCOUNTER11, > + CSR_HPMCOUNTER12, > + CSR_HPMCOUNTER13, > + CSR_HPMCOUNTER14, > + CSR_HPMCOUNTER15, > + CSR_HPMCOUNTER16, > + CSR_HPMCOUNTER17, > + CSR_HPMCOUNTER18, > + CSR_HPMCOUNTER19, > + CSR_HPMCOUNTER20, > + CSR_HPMCOUNTER21, > + CSR_HPMCOUNTER22, > + CSR_HPMCOUNTER23, > + CSR_HPMCOUNTER24, > + CSR_HPMCOUNTER25, > + CSR_HPMCOUNTER26, > + CSR_HPMCOUNTER27, > + CSR_HPMCOUNTER28, > + CSR_HPMCOUNTER29, > + CSR_HPMCOUNTER30, > + CSR_HPMCOUNTER31, > + CSR_CYCLEH, > + CSR_TIMEH, > + CSR_INSTRETH, > + CSR_HPMCOUNTER3H, > + CSR_HPMCOUNTER4H, > + CSR_HPMCOUNTER5H, > + CSR_HPMCOUNTER6H, > + CSR_HPMCOUNTER7H, > + CSR_HPMCOUNTER8H, > + CSR_HPMCOUNTER9H, > + CSR_HPMCOUNTER10H, > + CSR_HPMCOUNTER11H, > + CSR_HPMCOUNTER12H, > + CSR_HPMCOUNTER13H, > + CSR_HPMCOUNTER14H, > + CSR_HPMCOUNTER15H, > + CSR_HPMCOUNTER16H, > + CSR_HPMCOUNTER17H, > + CSR_HPMCOUNTER18H, > + CSR_HPMCOUNTER19H, > + CSR_HPMCOUNTER20H, > + CSR_HPMCOUNTER21H, > + CSR_HPMCOUNTER22H, > + CSR_HPMCOUNTER23H, > + CSR_HPMCOUNTER24H, > + CSR_HPMCOUNTER25H, > + CSR_HPMCOUNTER26H, > + CSR_HPMCOUNTER27H, > + CSR_HPMCOUNTER28H, > + CSR_HPMCOUNTER29H, > + CSR_HPMCOUNTER30H, > + CSR_HPMCOUNTER31H, > + CSR_SSTATUS, > + CSR_SEDELEG, > + CSR_SIDELEG, > + CSR_SIE, > + CSR_STVEC, > + CSR_SCOUNTEREN, > + CSR_SSCRATCH, > + CSR_SEPC, > + CSR_SCAUSE, > + CSR_STVAL, > + CSR_SIP, > + CSR_SATP, > + CSR_MVENDORID, > + CSR_MARCHID, > + CSR_MIMPID, > + CSR_MHARTID, > + CSR_MSTATUS, > + CSR_MISA, > + CSR_MEDELEG, > + CSR_MIDELEG, > + CSR_MIE, > + CSR_MTVEC, > + CSR_MCOUNTEREN, > + CSR_MSCRATCH, > + CSR_MEPC, > + CSR_MCAUSE, > + CSR_MTVAL, > + CSR_MIP, > + CSR_PMPCFG0, > + CSR_PMPCFG1, > + CSR_PMPCFG2, > + CSR_PMPCFG3, > + CSR_PMPADDR0, > + CSR_PMPADDR1, > + CSR_PMPADDR2, > + CSR_PMPADDR3, > + CSR_PMPADDR4, > + CSR_PMPADDR5, > + CSR_PMPADDR6, > + CSR_PMPADDR7, > + CSR_PMPADDR8, > + CSR_PMPADDR9, > + CSR_PMPADDR10, > + CSR_PMPADDR11, > + CSR_PMPADDR12, > + CSR_PMPADDR13, > + CSR_PMPADDR14, > + CSR_PMPADDR15, > + CSR_MCYCLE, > + CSR_MINSTRET, > + CSR_MHPMCOUNTER3, > + CSR_MHPMCOUNTER4, > + CSR_MHPMCOUNTER5, > + CSR_MHPMCOUNTER6, > + CSR_MHPMCOUNTER7, > + CSR_MHPMCOUNTER8, > + CSR_MHPMCOUNTER9, > + CSR_MHPMCOUNTER10, > + CSR_MHPMCOUNTER11, > + CSR_MHPMCOUNTER12, > + CSR_MHPMCOUNTER13, > + CSR_MHPMCOUNTER14, > + CSR_MHPMCOUNTER15, > + CSR_MHPMCOUNTER16, > + CSR_MHPMCOUNTER17, > + CSR_MHPMCOUNTER18, > + CSR_MHPMCOUNTER19, > + CSR_MHPMCOUNTER20, > + CSR_MHPMCOUNTER21, > + CSR_MHPMCOUNTER22, > + CSR_MHPMCOUNTER23, > + CSR_MHPMCOUNTER24, > + CSR_MHPMCOUNTER25, > + CSR_MHPMCOUNTER26, > + CSR_MHPMCOUNTER27, > + CSR_MHPMCOUNTER28, > + CSR_MHPMCOUNTER29, > + CSR_MHPMCOUNTER30, > + CSR_MHPMCOUNTER31, > + CSR_MCYCLEH, > + CSR_MINSTRETH, > + CSR_MHPMCOUNTER3H, > + CSR_MHPMCOUNTER4H, > + CSR_MHPMCOUNTER5H, > + CSR_MHPMCOUNTER6H, > + CSR_MHPMCOUNTER7H, > + CSR_MHPMCOUNTER8H, > + CSR_MHPMCOUNTER9H, > + CSR_MHPMCOUNTER10H, > + CSR_MHPMCOUNTER11H, > + CSR_MHPMCOUNTER12H, > + CSR_MHPMCOUNTER13H, > + CSR_MHPMCOUNTER14H, > + CSR_MHPMCOUNTER15H, > + CSR_MHPMCOUNTER16H, > + CSR_MHPMCOUNTER17H, > + CSR_MHPMCOUNTER18H, > + CSR_MHPMCOUNTER19H, > + CSR_MHPMCOUNTER20H, > + CSR_MHPMCOUNTER21H, > + CSR_MHPMCOUNTER22H, > + CSR_MHPMCOUNTER23H, > + CSR_MHPMCOUNTER24H, > + CSR_MHPMCOUNTER25H, > + CSR_MHPMCOUNTER26H, > + CSR_MHPMCOUNTER27H, > + CSR_MHPMCOUNTER28H, > + CSR_MHPMCOUNTER29H, > + CSR_MHPMCOUNTER30H, > + CSR_MHPMCOUNTER31H, > + CSR_MHPMEVENT3, > + CSR_MHPMEVENT4, > + CSR_MHPMEVENT5, > + CSR_MHPMEVENT6, > + CSR_MHPMEVENT7, > + CSR_MHPMEVENT8, > + CSR_MHPMEVENT9, > + CSR_MHPMEVENT10, > + CSR_MHPMEVENT11, > + CSR_MHPMEVENT12, > + CSR_MHPMEVENT13, > + CSR_MHPMEVENT14, > + CSR_MHPMEVENT15, > + CSR_MHPMEVENT16, > + CSR_MHPMEVENT17, > + CSR_MHPMEVENT18, > + CSR_MHPMEVENT19, > + CSR_MHPMEVENT20, > + CSR_MHPMEVENT21, > + CSR_MHPMEVENT22, > + CSR_MHPMEVENT23, > + CSR_MHPMEVENT24, > + CSR_MHPMEVENT25, > + CSR_MHPMEVENT26, > + CSR_MHPMEVENT27, > + CSR_MHPMEVENT28, > + CSR_MHPMEVENT29, > + CSR_MHPMEVENT30, > + CSR_MHPMEVENT31, > + CSR_TSELECT, > + CSR_TDATA1, > + CSR_TDATA2, > + CSR_TDATA3, > + CSR_DCSR, > + CSR_DPC, > + CSR_DSCRATCH, > + CSR_HSTATUS, > + CSR_HEDELEG, > + CSR_HIDELEG, > + CSR_HIE, > + CSR_HTVEC, > + CSR_HSCRATCH, > + CSR_HEPC, > + CSR_HCAUSE, > + CSR_HBADADDR, > + CSR_HIP, > + CSR_MBASE, > + CSR_MBOUND, > + CSR_MIBASE, > + CSR_MIBOUND, > + CSR_MDBASE, > + CSR_MDBOUND, > + CSR_MUCOUNTEREN, > + CSR_MSCOUNTEREN, > + CSR_MHCOUNTEREN, > +}; > + > int riscv_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) > { > RISCVCPU *cpu = RISCV_CPU(cs); > @@ -30,13 +279,6 @@ int riscv_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) > return gdb_get_regl(mem_buf, env->gpr[n]); > } else if (n == 32) { > return gdb_get_regl(mem_buf, env->pc); > - } else if (n < 65) { > - return gdb_get_reg64(mem_buf, env->fpr[n - 33]); > - } else if (n < 4096 + 65) { > - target_ulong val = 0; > - if (riscv_csrrw(env, n - 65, &val, 0, 0) == 0) { > - return gdb_get_regl(mem_buf, val); > - } > } > return 0; > } > @@ -55,14 +297,100 @@ int riscv_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) > } else if (n == 32) { > env->pc = ldtul_p(mem_buf); > return sizeof(target_ulong); > - } else if (n < 65) { > - env->fpr[n - 33] = ldq_p(mem_buf); /* always 64-bit */ > + } > + return 0; > +} > + > +static int riscv_gdb_get_fpu(CPURISCVState *env, uint8_t *mem_buf, int n) > +{ > + if (n < 32) { > + return gdb_get_reg64(mem_buf, env->fpr[n]); > + /* there is hole between ft11 and fflags in fpu.xml */ > + } else if (n < 36 && n > 32) { > + target_ulong val = 0; > + int result; > + /* > + * CSR_FFLAGS is at index 8 in csr_register, and gdb says it is FP > + * register 33, so we recalculate the map index. > + * This also works for CSR_FRM and CSR_FCSR. > + */ > + result = riscv_csrrw_debug(env, n - 33 + 8, &val, 0, 0); > + if (result == 0) { > + return gdb_get_regl(mem_buf, val); > + } > + } > + return 0; > +} > + > +static int riscv_gdb_set_fpu(CPURISCVState *env, uint8_t *mem_buf, int n) > +{ > + if (n < 32) { > + env->fpr[n] = ldq_p(mem_buf); /* always 64-bit */ > return sizeof(uint64_t); > - } else if (n < 4096 + 65) { > + /* there is hole between ft11 and fflags in fpu.xml */ > + } else if (n < 36 && n > 32) { > target_ulong val = ldtul_p(mem_buf); > - if (riscv_csrrw(env, n - 65, NULL, val, -1) == 0) { > + int result; > + /* > + * CSR_FFLAGS is at index 8 in csr_register, and gdb says it is FP > + * register 33, so we recalculate the map index. > + * This also works for CSR_FRM and CSR_FCSR. > + */ > + result = riscv_csrrw_debug(env, n - 33 + 8, NULL, val, -1); > + if (result == 0) { > return sizeof(target_ulong); > } > } > return 0; > } > + > +static int riscv_gdb_get_csr(CPURISCVState *env, uint8_t *mem_buf, int n) > +{ > + if (n < ARRAY_SIZE(csr_register_map)) { > + target_ulong val = 0; > + int result; > + > + result = riscv_csrrw_debug(env, csr_register_map[n], &val, 0, 0); > + if (result == 0) { > + return gdb_get_regl(mem_buf, val); > + } > + } > + return 0; > +} > + > +static int riscv_gdb_set_csr(CPURISCVState *env, uint8_t *mem_buf, int n) > +{ > + if (n < ARRAY_SIZE(csr_register_map)) { > + target_ulong val = ldtul_p(mem_buf); > + int result; > + > + result = riscv_csrrw_debug(env, csr_register_map[n], NULL, val, -1); > + if (result == 0) { > + return sizeof(target_ulong); > + } > + } > + return 0; > +} > + > +void riscv_cpu_register_gdb_regs_for_features(CPUState *cs) > +{ > + RISCVCPU *cpu = RISCV_CPU(cs); > + CPURISCVState *env = &cpu->env; > +#if defined(TARGET_RISCV32) > + if (env->misa & RVF) { > + gdb_register_coprocessor(cs, riscv_gdb_get_fpu, riscv_gdb_set_fpu, > + 36, "riscv-32bit-fpu.xml", 0); > + } > + > + gdb_register_coprocessor(cs, riscv_gdb_get_csr, riscv_gdb_set_csr, > + 4096, "riscv-32bit-csr.xml", 0); > +#elif defined(TARGET_RISCV64) > + if (env->misa & RVF) { > + gdb_register_coprocessor(cs, riscv_gdb_get_fpu, riscv_gdb_set_fpu, > + 36, "riscv-64bit-fpu.xml", 0); > + } > + > + gdb_register_coprocessor(cs, riscv_gdb_get_csr, riscv_gdb_set_csr, > + 4096, "riscv-64bit-csr.xml", 0); > +#endif > +} > -- > 2.7.4 > >
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index cc3ddc0..feea169 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -311,6 +311,8 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp) return; } + riscv_cpu_register_gdb_regs_for_features(cs); + qemu_init_vcpu(cs); cpu_reset(cs); @@ -351,7 +353,12 @@ static void riscv_cpu_class_init(ObjectClass *c, void *data) cc->synchronize_from_tb = riscv_cpu_synchronize_from_tb; cc->gdb_read_register = riscv_cpu_gdb_read_register; cc->gdb_write_register = riscv_cpu_gdb_write_register; - cc->gdb_num_core_regs = 65; + cc->gdb_num_core_regs = 33; +#if defined(TARGET_RISCV32) + cc->gdb_core_xml_file = "riscv-32bit-cpu.xml"; +#elif defined(TARGET_RISCV64) + cc->gdb_core_xml_file = "riscv-64bit-cpu.xml"; +#endif cc->gdb_stop_before_watchpoint = true; cc->disas_set_info = riscv_cpu_disas_set_info; #ifdef CONFIG_USER_ONLY diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 4c5de30..9b673de 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -330,6 +330,8 @@ typedef struct { void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops); void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops); +void riscv_cpu_register_gdb_regs_for_features(CPUState *cs); + #include "exec/cpu-all.h" #endif /* RISCV_CPU_H */ diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c index 3cabb21..dfcdd83 100644 --- a/target/riscv/gdbstub.c +++ b/target/riscv/gdbstub.c @@ -21,6 +21,255 @@ #include "exec/gdbstub.h" #include "cpu.h" +/* + * The GDB CSR xml files list them in documentation order, not numerical order, + * and are missing entries for unnamed CSRs. So we need to map the gdb numbers + * to the hardware numbers. + */ + +static int csr_register_map[] = { + CSR_USTATUS, + CSR_UIE, + CSR_UTVEC, + CSR_USCRATCH, + CSR_UEPC, + CSR_UCAUSE, + CSR_UTVAL, + CSR_UIP, + CSR_FFLAGS, + CSR_FRM, + CSR_FCSR, + CSR_CYCLE, + CSR_TIME, + CSR_INSTRET, + CSR_HPMCOUNTER3, + CSR_HPMCOUNTER4, + CSR_HPMCOUNTER5, + CSR_HPMCOUNTER6, + CSR_HPMCOUNTER7, + CSR_HPMCOUNTER8, + CSR_HPMCOUNTER9, + CSR_HPMCOUNTER10, + CSR_HPMCOUNTER11, + CSR_HPMCOUNTER12, + CSR_HPMCOUNTER13, + CSR_HPMCOUNTER14, + CSR_HPMCOUNTER15, + CSR_HPMCOUNTER16, + CSR_HPMCOUNTER17, + CSR_HPMCOUNTER18, + CSR_HPMCOUNTER19, + CSR_HPMCOUNTER20, + CSR_HPMCOUNTER21, + CSR_HPMCOUNTER22, + CSR_HPMCOUNTER23, + CSR_HPMCOUNTER24, + CSR_HPMCOUNTER25, + CSR_HPMCOUNTER26, + CSR_HPMCOUNTER27, + CSR_HPMCOUNTER28, + CSR_HPMCOUNTER29, + CSR_HPMCOUNTER30, + CSR_HPMCOUNTER31, + CSR_CYCLEH, + CSR_TIMEH, + CSR_INSTRETH, + CSR_HPMCOUNTER3H, + CSR_HPMCOUNTER4H, + CSR_HPMCOUNTER5H, + CSR_HPMCOUNTER6H, + CSR_HPMCOUNTER7H, + CSR_HPMCOUNTER8H, + CSR_HPMCOUNTER9H, + CSR_HPMCOUNTER10H, + CSR_HPMCOUNTER11H, + CSR_HPMCOUNTER12H, + CSR_HPMCOUNTER13H, + CSR_HPMCOUNTER14H, + CSR_HPMCOUNTER15H, + CSR_HPMCOUNTER16H, + CSR_HPMCOUNTER17H, + CSR_HPMCOUNTER18H, + CSR_HPMCOUNTER19H, + CSR_HPMCOUNTER20H, + CSR_HPMCOUNTER21H, + CSR_HPMCOUNTER22H, + CSR_HPMCOUNTER23H, + CSR_HPMCOUNTER24H, + CSR_HPMCOUNTER25H, + CSR_HPMCOUNTER26H, + CSR_HPMCOUNTER27H, + CSR_HPMCOUNTER28H, + CSR_HPMCOUNTER29H, + CSR_HPMCOUNTER30H, + CSR_HPMCOUNTER31H, + CSR_SSTATUS, + CSR_SEDELEG, + CSR_SIDELEG, + CSR_SIE, + CSR_STVEC, + CSR_SCOUNTEREN, + CSR_SSCRATCH, + CSR_SEPC, + CSR_SCAUSE, + CSR_STVAL, + CSR_SIP, + CSR_SATP, + CSR_MVENDORID, + CSR_MARCHID, + CSR_MIMPID, + CSR_MHARTID, + CSR_MSTATUS, + CSR_MISA, + CSR_MEDELEG, + CSR_MIDELEG, + CSR_MIE, + CSR_MTVEC, + CSR_MCOUNTEREN, + CSR_MSCRATCH, + CSR_MEPC, + CSR_MCAUSE, + CSR_MTVAL, + CSR_MIP, + CSR_PMPCFG0, + CSR_PMPCFG1, + CSR_PMPCFG2, + CSR_PMPCFG3, + CSR_PMPADDR0, + CSR_PMPADDR1, + CSR_PMPADDR2, + CSR_PMPADDR3, + CSR_PMPADDR4, + CSR_PMPADDR5, + CSR_PMPADDR6, + CSR_PMPADDR7, + CSR_PMPADDR8, + CSR_PMPADDR9, + CSR_PMPADDR10, + CSR_PMPADDR11, + CSR_PMPADDR12, + CSR_PMPADDR13, + CSR_PMPADDR14, + CSR_PMPADDR15, + CSR_MCYCLE, + CSR_MINSTRET, + CSR_MHPMCOUNTER3, + CSR_MHPMCOUNTER4, + CSR_MHPMCOUNTER5, + CSR_MHPMCOUNTER6, + CSR_MHPMCOUNTER7, + CSR_MHPMCOUNTER8, + CSR_MHPMCOUNTER9, + CSR_MHPMCOUNTER10, + CSR_MHPMCOUNTER11, + CSR_MHPMCOUNTER12, + CSR_MHPMCOUNTER13, + CSR_MHPMCOUNTER14, + CSR_MHPMCOUNTER15, + CSR_MHPMCOUNTER16, + CSR_MHPMCOUNTER17, + CSR_MHPMCOUNTER18, + CSR_MHPMCOUNTER19, + CSR_MHPMCOUNTER20, + CSR_MHPMCOUNTER21, + CSR_MHPMCOUNTER22, + CSR_MHPMCOUNTER23, + CSR_MHPMCOUNTER24, + CSR_MHPMCOUNTER25, + CSR_MHPMCOUNTER26, + CSR_MHPMCOUNTER27, + CSR_MHPMCOUNTER28, + CSR_MHPMCOUNTER29, + CSR_MHPMCOUNTER30, + CSR_MHPMCOUNTER31, + CSR_MCYCLEH, + CSR_MINSTRETH, + CSR_MHPMCOUNTER3H, + CSR_MHPMCOUNTER4H, + CSR_MHPMCOUNTER5H, + CSR_MHPMCOUNTER6H, + CSR_MHPMCOUNTER7H, + CSR_MHPMCOUNTER8H, + CSR_MHPMCOUNTER9H, + CSR_MHPMCOUNTER10H, + CSR_MHPMCOUNTER11H, + CSR_MHPMCOUNTER12H, + CSR_MHPMCOUNTER13H, + CSR_MHPMCOUNTER14H, + CSR_MHPMCOUNTER15H, + CSR_MHPMCOUNTER16H, + CSR_MHPMCOUNTER17H, + CSR_MHPMCOUNTER18H, + CSR_MHPMCOUNTER19H, + CSR_MHPMCOUNTER20H, + CSR_MHPMCOUNTER21H, + CSR_MHPMCOUNTER22H, + CSR_MHPMCOUNTER23H, + CSR_MHPMCOUNTER24H, + CSR_MHPMCOUNTER25H, + CSR_MHPMCOUNTER26H, + CSR_MHPMCOUNTER27H, + CSR_MHPMCOUNTER28H, + CSR_MHPMCOUNTER29H, + CSR_MHPMCOUNTER30H, + CSR_MHPMCOUNTER31H, + CSR_MHPMEVENT3, + CSR_MHPMEVENT4, + CSR_MHPMEVENT5, + CSR_MHPMEVENT6, + CSR_MHPMEVENT7, + CSR_MHPMEVENT8, + CSR_MHPMEVENT9, + CSR_MHPMEVENT10, + CSR_MHPMEVENT11, + CSR_MHPMEVENT12, + CSR_MHPMEVENT13, + CSR_MHPMEVENT14, + CSR_MHPMEVENT15, + CSR_MHPMEVENT16, + CSR_MHPMEVENT17, + CSR_MHPMEVENT18, + CSR_MHPMEVENT19, + CSR_MHPMEVENT20, + CSR_MHPMEVENT21, + CSR_MHPMEVENT22, + CSR_MHPMEVENT23, + CSR_MHPMEVENT24, + CSR_MHPMEVENT25, + CSR_MHPMEVENT26, + CSR_MHPMEVENT27, + CSR_MHPMEVENT28, + CSR_MHPMEVENT29, + CSR_MHPMEVENT30, + CSR_MHPMEVENT31, + CSR_TSELECT, + CSR_TDATA1, + CSR_TDATA2, + CSR_TDATA3, + CSR_DCSR, + CSR_DPC, + CSR_DSCRATCH, + CSR_HSTATUS, + CSR_HEDELEG, + CSR_HIDELEG, + CSR_HIE, + CSR_HTVEC, + CSR_HSCRATCH, + CSR_HEPC, + CSR_HCAUSE, + CSR_HBADADDR, + CSR_HIP, + CSR_MBASE, + CSR_MBOUND, + CSR_MIBASE, + CSR_MIBOUND, + CSR_MDBASE, + CSR_MDBOUND, + CSR_MUCOUNTEREN, + CSR_MSCOUNTEREN, + CSR_MHCOUNTEREN, +}; + int riscv_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) { RISCVCPU *cpu = RISCV_CPU(cs); @@ -30,13 +279,6 @@ int riscv_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n) return gdb_get_regl(mem_buf, env->gpr[n]); } else if (n == 32) { return gdb_get_regl(mem_buf, env->pc); - } else if (n < 65) { - return gdb_get_reg64(mem_buf, env->fpr[n - 33]); - } else if (n < 4096 + 65) { - target_ulong val = 0; - if (riscv_csrrw(env, n - 65, &val, 0, 0) == 0) { - return gdb_get_regl(mem_buf, val); - } } return 0; } @@ -55,14 +297,100 @@ int riscv_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n) } else if (n == 32) { env->pc = ldtul_p(mem_buf); return sizeof(target_ulong); - } else if (n < 65) { - env->fpr[n - 33] = ldq_p(mem_buf); /* always 64-bit */ + } + return 0; +} + +static int riscv_gdb_get_fpu(CPURISCVState *env, uint8_t *mem_buf, int n) +{ + if (n < 32) { + return gdb_get_reg64(mem_buf, env->fpr[n]); + /* there is hole between ft11 and fflags in fpu.xml */ + } else if (n < 36 && n > 32) { + target_ulong val = 0; + int result; + /* + * CSR_FFLAGS is at index 8 in csr_register, and gdb says it is FP + * register 33, so we recalculate the map index. + * This also works for CSR_FRM and CSR_FCSR. + */ + result = riscv_csrrw_debug(env, n - 33 + 8, &val, 0, 0); + if (result == 0) { + return gdb_get_regl(mem_buf, val); + } + } + return 0; +} + +static int riscv_gdb_set_fpu(CPURISCVState *env, uint8_t *mem_buf, int n) +{ + if (n < 32) { + env->fpr[n] = ldq_p(mem_buf); /* always 64-bit */ return sizeof(uint64_t); - } else if (n < 4096 + 65) { + /* there is hole between ft11 and fflags in fpu.xml */ + } else if (n < 36 && n > 32) { target_ulong val = ldtul_p(mem_buf); - if (riscv_csrrw(env, n - 65, NULL, val, -1) == 0) { + int result; + /* + * CSR_FFLAGS is at index 8 in csr_register, and gdb says it is FP + * register 33, so we recalculate the map index. + * This also works for CSR_FRM and CSR_FCSR. + */ + result = riscv_csrrw_debug(env, n - 33 + 8, NULL, val, -1); + if (result == 0) { return sizeof(target_ulong); } } return 0; } + +static int riscv_gdb_get_csr(CPURISCVState *env, uint8_t *mem_buf, int n) +{ + if (n < ARRAY_SIZE(csr_register_map)) { + target_ulong val = 0; + int result; + + result = riscv_csrrw_debug(env, csr_register_map[n], &val, 0, 0); + if (result == 0) { + return gdb_get_regl(mem_buf, val); + } + } + return 0; +} + +static int riscv_gdb_set_csr(CPURISCVState *env, uint8_t *mem_buf, int n) +{ + if (n < ARRAY_SIZE(csr_register_map)) { + target_ulong val = ldtul_p(mem_buf); + int result; + + result = riscv_csrrw_debug(env, csr_register_map[n], NULL, val, -1); + if (result == 0) { + return sizeof(target_ulong); + } + } + return 0; +} + +void riscv_cpu_register_gdb_regs_for_features(CPUState *cs) +{ + RISCVCPU *cpu = RISCV_CPU(cs); + CPURISCVState *env = &cpu->env; +#if defined(TARGET_RISCV32) + if (env->misa & RVF) { + gdb_register_coprocessor(cs, riscv_gdb_get_fpu, riscv_gdb_set_fpu, + 36, "riscv-32bit-fpu.xml", 0); + } + + gdb_register_coprocessor(cs, riscv_gdb_get_csr, riscv_gdb_set_csr, + 4096, "riscv-32bit-csr.xml", 0); +#elif defined(TARGET_RISCV64) + if (env->misa & RVF) { + gdb_register_coprocessor(cs, riscv_gdb_get_fpu, riscv_gdb_set_fpu, + 36, "riscv-64bit-fpu.xml", 0); + } + + gdb_register_coprocessor(cs, riscv_gdb_get_csr, riscv_gdb_set_csr, + 4096, "riscv-64bit-csr.xml", 0); +#endif +}