From 4c833c60e0479d4eec5384fa9ede11ebab78a304 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Tue, 2 Apr 2024 23:44:53 -1000 Subject: [PATCH] disas: Use translator_st to get disassembly data MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Read from already translated pages, or saved mmio data. Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson --- accel/tcg/translator.c | 2 +- disas/disas-common.c | 14 -------------- disas/disas-mon.c | 15 +++++++++++++++ disas/disas-target.c | 19 +++++++++++++++++-- include/disas/disas.h | 5 +++-- include/exec/translator.h | 4 ++-- include/qemu/typedefs.h | 1 + plugins/api.c | 4 ++-- 8 files changed, 41 insertions(+), 23 deletions(-) diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c index ccd22dcd95..00322c6fd9 100644 --- a/accel/tcg/translator.c +++ b/accel/tcg/translator.c @@ -231,7 +231,7 @@ void translator_loop(CPUState *cpu, TranslationBlock *tb, int *max_insns, if (!ops->disas_log || !ops->disas_log(db, cpu, logfile)) { fprintf(logfile, "IN: %s\n", lookup_symbol(db->pc_first)); - target_disas(logfile, cpu, db->pc_first, db->tb->size); + target_disas(logfile, cpu, db); } fprintf(logfile, "\n"); qemu_log_unlock(logfile); diff --git a/disas/disas-common.c b/disas/disas-common.c index ce9f82b711..de61f6d8a1 100644 --- a/disas/disas-common.c +++ b/disas/disas-common.c @@ -8,25 +8,12 @@ #include "disas/capstone.h" #include "hw/core/cpu.h" #include "exec/tswap.h" -#include "exec/memory.h" #include "disas-internal.h" /* Filled in by elfload.c. Simplistic, but will do for now. */ struct syminfo *syminfos = NULL; -/* - * Get LENGTH bytes from info's buffer, at target address memaddr. - * Transfer them to myaddr. - */ -static int target_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length, - struct disassemble_info *info) -{ - CPUDebug *s = container_of(info, CPUDebug, info); - int r = cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0); - return r ? EIO : 0; -} - /* * Print an error message. We can assume that this is in response to * an error return from {host,target}_read_memory. @@ -73,7 +60,6 @@ void disas_initialize_debug_target(CPUDebug *s, CPUState *cpu) disas_initialize_debug(s); s->cpu = cpu; - s->info.read_memory_func = target_read_memory; s->info.print_address_func = print_address; if (target_words_bigendian()) { s->info.endian = BFD_ENDIAN_BIG; diff --git a/disas/disas-mon.c b/disas/disas-mon.c index 5d6d9aa02d..37bf16ac79 100644 --- a/disas/disas-mon.c +++ b/disas/disas-mon.c @@ -11,6 +11,19 @@ #include "hw/core/cpu.h" #include "monitor/monitor.h" +/* + * Get LENGTH bytes from info's buffer, at target address memaddr. + * Transfer them to myaddr. + */ +static int +virtual_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length, + struct disassemble_info *info) +{ + CPUDebug *s = container_of(info, CPUDebug, info); + int r = cpu_memory_rw_debug(s->cpu, memaddr, myaddr, length, 0); + return r ? EIO : 0; +} + static int physical_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length, struct disassemble_info *info) @@ -38,6 +51,8 @@ void monitor_disas(Monitor *mon, CPUState *cpu, uint64_t pc, if (is_physical) { s.info.read_memory_func = physical_read_memory; + } else { + s.info.read_memory_func = virtual_read_memory; } s.info.buffer_vma = pc; diff --git a/disas/disas-target.c b/disas/disas-target.c index 82313b2a67..48f3a365dc 100644 --- a/disas/disas-target.c +++ b/disas/disas-target.c @@ -6,16 +6,28 @@ #include "qemu/osdep.h" #include "disas/disas.h" #include "disas/capstone.h" +#include "exec/translator.h" #include "disas-internal.h" -void target_disas(FILE *out, CPUState *cpu, uint64_t code, size_t size) +static int translator_read_memory(bfd_vma memaddr, bfd_byte *myaddr, + int length, struct disassemble_info *info) { + const DisasContextBase *db = info->application_data; + return translator_st(db, myaddr, memaddr, length) ? 0 : EIO; +} + +void target_disas(FILE *out, CPUState *cpu, const struct DisasContextBase *db) +{ + uint64_t code = db->pc_first; + size_t size = translator_st_len(db); uint64_t pc; int count; CPUDebug s; disas_initialize_debug_target(&s, cpu); + s.info.read_memory_func = translator_read_memory; + s.info.application_data = (void *)db; s.info.fprintf_func = fprintf; s.info.stream = out; s.info.buffer_vma = code; @@ -58,12 +70,15 @@ static void plugin_print_address(bfd_vma addr, struct disassemble_info *info) * there is left over it usually indicates the front end has read more * bytes than it needed. */ -char *plugin_disas(CPUState *cpu, uint64_t addr, size_t size) +char *plugin_disas(CPUState *cpu, const DisasContextBase *db, + uint64_t addr, size_t size) { CPUDebug s; GString *ds = g_string_new(NULL); disas_initialize_debug_target(&s, cpu); + s.info.read_memory_func = translator_read_memory; + s.info.application_data = (void *)db; s.info.fprintf_func = disas_gstring_printf; s.info.stream = (FILE *)ds; /* abuse this slot */ s.info.buffer_vma = addr; diff --git a/include/disas/disas.h b/include/disas/disas.h index 54a5e68443..c702b1effc 100644 --- a/include/disas/disas.h +++ b/include/disas/disas.h @@ -4,14 +4,15 @@ /* Disassemble this for me please... (debugging). */ #ifdef CONFIG_TCG void disas(FILE *out, const void *code, size_t size); -void target_disas(FILE *out, CPUState *cpu, uint64_t code, size_t size); +void target_disas(FILE *out, CPUState *cpu, const DisasContextBase *db); #endif void monitor_disas(Monitor *mon, CPUState *cpu, uint64_t pc, int nb_insn, bool is_physical); #ifdef CONFIG_PLUGIN -char *plugin_disas(CPUState *cpu, uint64_t addr, size_t size); +char *plugin_disas(CPUState *cpu, const DisasContextBase *db, + uint64_t addr, size_t size); #endif /* Look up symbol for debugging purpose. Returns "" if unknown. */ diff --git a/include/exec/translator.h b/include/exec/translator.h index 31c39ab63c..411ce2b47e 100644 --- a/include/exec/translator.h +++ b/include/exec/translator.h @@ -79,7 +79,7 @@ typedef enum DisasJumpType { * * Architecture-agnostic disassembly context. */ -typedef struct DisasContextBase { +struct DisasContextBase { TranslationBlock *tb; vaddr pc_first; vaddr pc_next; @@ -103,7 +103,7 @@ typedef struct DisasContextBase { int record_start; int record_len; uint8_t record[32]; -} DisasContextBase; +}; /** * TranslatorOps: diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h index b47e7179e2..9d222dc376 100644 --- a/include/qemu/typedefs.h +++ b/include/qemu/typedefs.h @@ -42,6 +42,7 @@ typedef struct CPUPluginState CPUPluginState; typedef struct CPUState CPUState; typedef struct DeviceState DeviceState; typedef struct DirtyBitmapSnapshot DirtyBitmapSnapshot; +typedef struct DisasContextBase DisasContextBase; typedef struct DisplayChangeListener DisplayChangeListener; typedef struct DriveInfo DriveInfo; typedef struct DumpState DumpState; diff --git a/plugins/api.c b/plugins/api.c index 02014d4c6e..b04c5e1928 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -271,8 +271,8 @@ void *qemu_plugin_insn_haddr(const struct qemu_plugin_insn *insn) char *qemu_plugin_insn_disas(const struct qemu_plugin_insn *insn) { - CPUState *cpu = current_cpu; - return plugin_disas(cpu, insn->vaddr, insn->len); + return plugin_disas(tcg_ctx->cpu, tcg_ctx->plugin_db, + insn->vaddr, insn->len); } const char *qemu_plugin_insn_symbol(const struct qemu_plugin_insn *insn)