diff options
Diffstat (limited to 'plugins')
| -rw-r--r-- | plugins/api-system.c | 131 | ||||
| -rw-r--r-- | plugins/api-user.c | 57 | ||||
| -rw-r--r-- | plugins/api.c | 354 | ||||
| -rw-r--r-- | plugins/core.c | 92 | ||||
| -rw-r--r-- | plugins/loader.c | 21 | ||||
| -rw-r--r-- | plugins/meson.build | 78 | ||||
| -rw-r--r-- | plugins/plugin.h | 7 | ||||
| -rw-r--r-- | plugins/qemu-plugins.symbols | 57 | ||||
| -rw-r--r-- | plugins/system.c | 24 | ||||
| -rw-r--r-- | plugins/user.c | 19 |
10 files changed, 553 insertions, 287 deletions
diff --git a/plugins/api-system.c b/plugins/api-system.c new file mode 100644 index 0000000..cc190b1 --- /dev/null +++ b/plugins/api-system.c @@ -0,0 +1,131 @@ +/* + * QEMU Plugin API - System specific implementations + * + * This provides the APIs that have a specific system implementation + * or are only relevant to system-mode. + * + * Copyright (C) 2017, Emilio G. Cota <cota@braap.org> + * Copyright (C) 2019-2025, Linaro + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qemu/main-loop.h" +#include "qapi/error.h" +#include "migration/blocker.h" +#include "hw/boards.h" +#include "qemu/plugin-memory.h" +#include "qemu/plugin.h" + +/* + * In system mode we cannot trace the binary being executed so the + * helpers all return NULL/0. + */ +const char *qemu_plugin_path_to_binary(void) +{ + return NULL; +} + +uint64_t qemu_plugin_start_code(void) +{ + return 0; +} + +uint64_t qemu_plugin_end_code(void) +{ + return 0; +} + +uint64_t qemu_plugin_entry_code(void) +{ + return 0; +} + +/* + * Virtual Memory queries + */ + +static __thread struct qemu_plugin_hwaddr hwaddr_info; + +struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info, + uint64_t vaddr) +{ + CPUState *cpu = current_cpu; + unsigned int mmu_idx = get_mmuidx(info); + enum qemu_plugin_mem_rw rw = get_plugin_meminfo_rw(info); + hwaddr_info.is_store = (rw & QEMU_PLUGIN_MEM_W) != 0; + + assert(mmu_idx < NB_MMU_MODES); + + if (!tlb_plugin_lookup(cpu, vaddr, mmu_idx, + hwaddr_info.is_store, &hwaddr_info)) { + error_report("invalid use of qemu_plugin_get_hwaddr"); + return NULL; + } + + return &hwaddr_info; +} + +bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr) +{ + return haddr->is_io; +} + +uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr) +{ + if (haddr) { + return haddr->phys_addr; + } + return 0; +} + +const char *qemu_plugin_hwaddr_device_name(const struct qemu_plugin_hwaddr *h) +{ + if (h && h->is_io) { + MemoryRegion *mr = h->mr; + if (!mr->name) { + unsigned maddr = (uintptr_t)mr; + g_autofree char *temp = g_strdup_printf("anon%08x", maddr); + return g_intern_string(temp); + } else { + return g_intern_string(mr->name); + } + } else { + return g_intern_static_string("RAM"); + } +} + +/* + * Time control + */ +static bool has_control; +static Error *migration_blocker; + +const void *qemu_plugin_request_time_control(void) +{ + if (!has_control) { + has_control = true; + error_setg(&migration_blocker, + "TCG plugin time control does not support migration"); + migrate_add_blocker(&migration_blocker, NULL); + return &has_control; + } + return NULL; +} + +static void advance_virtual_time__async(CPUState *cpu, run_on_cpu_data data) +{ + int64_t new_time = data.host_ulong; + qemu_clock_advance_virtual_time(new_time); +} + +void qemu_plugin_update_ns(const void *handle, int64_t new_time) +{ + if (handle == &has_control) { + /* Need to execute out of cpu_exec, so bql can be locked. */ + async_run_on_cpu(current_cpu, + advance_virtual_time__async, + RUN_ON_CPU_HOST_ULONG(new_time)); + } +} diff --git a/plugins/api-user.c b/plugins/api-user.c new file mode 100644 index 0000000..28704a8 --- /dev/null +++ b/plugins/api-user.c @@ -0,0 +1,57 @@ +/* + * QEMU Plugin API - user-mode only implementations + * + * This provides the APIs that have a user-mode specific + * implementations or are only relevant to user-mode. + * + * Copyright (C) 2017, Emilio G. Cota <cota@braap.org> + * Copyright (C) 2019-2025, Linaro + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qemu/plugin.h" +#include "exec/log.h" + +/* + * Virtual Memory queries - these are all NOPs for user-mode which + * only ever has visibility of virtual addresses. + */ + +struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info, + uint64_t vaddr) +{ + return NULL; +} + +bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr) +{ + return false; +} + +uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr) +{ + return 0; +} + +const char *qemu_plugin_hwaddr_device_name(const struct qemu_plugin_hwaddr *h) +{ + return g_intern_static_string("Invalid"); +} + +/* + * Time control - for user mode the only real time is wall clock time + * so realistically all you can do in user mode is slow down execution + * which doesn't require the ability to mess with the clock. + */ + +const void *qemu_plugin_request_time_control(void) +{ + return NULL; +} + +void qemu_plugin_update_ns(const void *handle, int64_t new_time) +{ + qemu_log_mask(LOG_UNIMP, "user-mode can't control time"); +} diff --git a/plugins/api.c b/plugins/api.c index 2ff13d0..eac04cc 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -39,25 +39,14 @@ #include "qemu/main-loop.h" #include "qemu/plugin.h" #include "qemu/log.h" -#include "qemu/timer.h" +#include "system/memory.h" #include "tcg/tcg.h" -#include "exec/exec-all.h" #include "exec/gdbstub.h" +#include "exec/target_page.h" +#include "exec/translation-block.h" #include "exec/translator.h" #include "disas/disas.h" #include "plugin.h" -#ifndef CONFIG_USER_ONLY -#include "qapi/error.h" -#include "migration/blocker.h" -#include "exec/ram_addr.h" -#include "qemu/plugin-memory.h" -#include "hw/boards.h" -#else -#include "qemu.h" -#ifdef CONFIG_LINUX -#include "loader.h" -#endif -#endif /* Uninstall and Reset handlers */ @@ -249,12 +238,10 @@ uint64_t qemu_plugin_tb_vaddr(const struct qemu_plugin_tb *tb) struct qemu_plugin_insn * qemu_plugin_tb_get_insn(const struct qemu_plugin_tb *tb, size_t idx) { - struct qemu_plugin_insn *insn; if (unlikely(idx >= tb->n)) { return NULL; } - insn = g_ptr_array_index(tb->insns, idx); - return insn; + return g_ptr_array_index(tb->insns, idx); } /* @@ -286,7 +273,7 @@ uint64_t qemu_plugin_insn_vaddr(const struct qemu_plugin_insn *insn) void *qemu_plugin_insn_haddr(const struct qemu_plugin_insn *insn) { const DisasContextBase *db = tcg_ctx->plugin_db; - vaddr page0_last = db->pc_first | ~TARGET_PAGE_MASK; + vaddr page0_last = db->pc_first | ~qemu_target_page_mask(); if (db->fake_insn) { return NULL; @@ -351,74 +338,37 @@ bool qemu_plugin_mem_is_store(qemu_plugin_meminfo_t info) return get_plugin_meminfo_rw(info) & QEMU_PLUGIN_MEM_W; } -/* - * Virtual Memory queries - */ - -#ifdef CONFIG_SOFTMMU -static __thread struct qemu_plugin_hwaddr hwaddr_info; -#endif - -struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info, - uint64_t vaddr) -{ -#ifdef CONFIG_SOFTMMU - CPUState *cpu = current_cpu; - unsigned int mmu_idx = get_mmuidx(info); - enum qemu_plugin_mem_rw rw = get_plugin_meminfo_rw(info); - hwaddr_info.is_store = (rw & QEMU_PLUGIN_MEM_W) != 0; - - assert(mmu_idx < NB_MMU_MODES); - - if (!tlb_plugin_lookup(cpu, vaddr, mmu_idx, - hwaddr_info.is_store, &hwaddr_info)) { - error_report("invalid use of qemu_plugin_get_hwaddr"); - return NULL; - } - - return &hwaddr_info; -#else - return NULL; -#endif -} - -bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr) -{ -#ifdef CONFIG_SOFTMMU - return haddr->is_io; -#else - return false; -#endif -} - -uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr) -{ -#ifdef CONFIG_SOFTMMU - if (haddr) { - return haddr->phys_addr; +qemu_plugin_mem_value qemu_plugin_mem_get_value(qemu_plugin_meminfo_t info) +{ + uint64_t low = current_cpu->neg.plugin_mem_value_low; + qemu_plugin_mem_value value; + + switch (qemu_plugin_mem_size_shift(info)) { + case 0: + value.type = QEMU_PLUGIN_MEM_VALUE_U8; + value.data.u8 = (uint8_t)low; + break; + case 1: + value.type = QEMU_PLUGIN_MEM_VALUE_U16; + value.data.u16 = (uint16_t)low; + break; + case 2: + value.type = QEMU_PLUGIN_MEM_VALUE_U32; + value.data.u32 = (uint32_t)low; + break; + case 3: + value.type = QEMU_PLUGIN_MEM_VALUE_U64; + value.data.u64 = low; + break; + case 4: + value.type = QEMU_PLUGIN_MEM_VALUE_U128; + value.data.u128.low = low; + value.data.u128.high = current_cpu->neg.plugin_mem_value_high; + break; + default: + g_assert_not_reached(); } -#endif - return 0; -} - -const char *qemu_plugin_hwaddr_device_name(const struct qemu_plugin_hwaddr *h) -{ -#ifdef CONFIG_SOFTMMU - if (h && h->is_io) { - MemoryRegion *mr = h->mr; - if (!mr->name) { - unsigned maddr = (uintptr_t)mr; - g_autofree char *temp = g_strdup_printf("anon%08x", maddr); - return g_intern_string(temp); - } else { - return g_intern_string(mr->name); - } - } else { - return g_intern_static_string("RAM"); - } -#else - return g_intern_static_string("Invalid"); -#endif + return value; } int qemu_plugin_num_vcpus(void) @@ -440,49 +390,6 @@ bool qemu_plugin_bool_parse(const char *name, const char *value, bool *ret) } /* - * Binary path, start and end locations - */ -const char *qemu_plugin_path_to_binary(void) -{ - char *path = NULL; -#ifdef CONFIG_USER_ONLY - TaskState *ts = get_task_state(current_cpu); - path = g_strdup(ts->bprm->filename); -#endif - return path; -} - -uint64_t qemu_plugin_start_code(void) -{ - uint64_t start = 0; -#ifdef CONFIG_USER_ONLY - TaskState *ts = get_task_state(current_cpu); - start = ts->info->start_code; -#endif - return start; -} - -uint64_t qemu_plugin_end_code(void) -{ - uint64_t end = 0; -#ifdef CONFIG_USER_ONLY - TaskState *ts = get_task_state(current_cpu); - end = ts->info->end_code; -#endif - return end; -} - -uint64_t qemu_plugin_entry_code(void) -{ - uint64_t entry = 0; -#ifdef CONFIG_USER_ONLY - TaskState *ts = get_task_state(current_cpu); - entry = ts->info->entry; -#endif - return entry; -} - -/* * Create register handles. * * We need to create a handle for each register so the plugin @@ -531,9 +438,159 @@ int qemu_plugin_read_register(struct qemu_plugin_register *reg, GByteArray *buf) { g_assert(current_cpu); + if (qemu_plugin_get_cb_flags() == QEMU_PLUGIN_CB_NO_REGS) { + return -1; + } + return gdb_read_register(current_cpu, buf, GPOINTER_TO_INT(reg) - 1); } +int qemu_plugin_write_register(struct qemu_plugin_register *reg, + GByteArray *buf) +{ + g_assert(current_cpu); + + if (buf->len == 0 || qemu_plugin_get_cb_flags() != QEMU_PLUGIN_CB_RW_REGS) { + return -1; + } + + return gdb_write_register(current_cpu, buf->data, GPOINTER_TO_INT(reg) - 1); +} + +bool qemu_plugin_read_memory_vaddr(uint64_t addr, GByteArray *data, size_t len) +{ + g_assert(current_cpu); + + if (len == 0) { + return false; + } + + g_byte_array_set_size(data, len); + + int result = cpu_memory_rw_debug(current_cpu, addr, data->data, + data->len, false); + + if (result < 0) { + return false; + } + + return true; +} + +bool qemu_plugin_write_memory_vaddr(uint64_t addr, GByteArray *data) +{ + g_assert(current_cpu); + + if (data->len == 0) { + return false; + } + + int result = cpu_memory_rw_debug(current_cpu, addr, data->data, + data->len, true); + + if (result < 0) { + return false; + } + + return true; +} + +enum qemu_plugin_hwaddr_operation_result +qemu_plugin_read_memory_hwaddr(hwaddr addr, GByteArray *data, size_t len) +{ +#ifdef CONFIG_SOFTMMU + if (len == 0) { + return QEMU_PLUGIN_HWADDR_OPERATION_ERROR; + } + + g_assert(current_cpu); + + + int as_idx = cpu_asidx_from_attrs(current_cpu, MEMTXATTRS_UNSPECIFIED); + AddressSpace *as = cpu_get_address_space(current_cpu, as_idx); + + if (as == NULL) { + return QEMU_PLUGIN_HWADDR_OPERATION_INVALID_ADDRESS_SPACE; + } + + g_byte_array_set_size(data, len); + MemTxResult res = address_space_rw(as, addr, + MEMTXATTRS_UNSPECIFIED, data->data, + data->len, false); + + switch (res) { + case MEMTX_OK: + return QEMU_PLUGIN_HWADDR_OPERATION_OK; + case MEMTX_ERROR: + return QEMU_PLUGIN_HWADDR_OPERATION_DEVICE_ERROR; + case MEMTX_DECODE_ERROR: + return QEMU_PLUGIN_HWADDR_OPERATION_INVALID_ADDRESS; + case MEMTX_ACCESS_ERROR: + return QEMU_PLUGIN_HWADDR_OPERATION_ACCESS_DENIED; + default: + return QEMU_PLUGIN_HWADDR_OPERATION_ERROR; + } +#else + return QEMU_PLUGIN_HWADDR_OPERATION_ERROR; +#endif +} + +enum qemu_plugin_hwaddr_operation_result +qemu_plugin_write_memory_hwaddr(hwaddr addr, GByteArray *data) +{ +#ifdef CONFIG_SOFTMMU + if (data->len == 0) { + return QEMU_PLUGIN_HWADDR_OPERATION_ERROR; + } + + g_assert(current_cpu); + + int as_idx = cpu_asidx_from_attrs(current_cpu, MEMTXATTRS_UNSPECIFIED); + AddressSpace *as = cpu_get_address_space(current_cpu, as_idx); + + if (as == NULL) { + return QEMU_PLUGIN_HWADDR_OPERATION_INVALID_ADDRESS_SPACE; + } + + MemTxResult res = address_space_rw(as, addr, + MEMTXATTRS_UNSPECIFIED, data->data, + data->len, true); + switch (res) { + case MEMTX_OK: + return QEMU_PLUGIN_HWADDR_OPERATION_OK; + case MEMTX_ERROR: + return QEMU_PLUGIN_HWADDR_OPERATION_DEVICE_ERROR; + case MEMTX_DECODE_ERROR: + return QEMU_PLUGIN_HWADDR_OPERATION_INVALID_ADDRESS; + case MEMTX_ACCESS_ERROR: + return QEMU_PLUGIN_HWADDR_OPERATION_ACCESS_DENIED; + default: + return QEMU_PLUGIN_HWADDR_OPERATION_ERROR; + } +#else + return QEMU_PLUGIN_HWADDR_OPERATION_ERROR; +#endif +} + +bool qemu_plugin_translate_vaddr(uint64_t vaddr, uint64_t *hwaddr) +{ +#ifdef CONFIG_SOFTMMU + g_assert(current_cpu); + + uint64_t res = cpu_get_phys_page_debug(current_cpu, vaddr); + + if (res == (uint64_t)-1) { + return false; + } + + *hwaddr = res | (vaddr & ~TARGET_PAGE_MASK); + + return true; +#else + return false; +#endif +} + struct qemu_plugin_scoreboard *qemu_plugin_scoreboard_new(size_t element_size) { return plugin_scoreboard_new(element_size); @@ -587,44 +644,3 @@ uint64_t qemu_plugin_u64_sum(qemu_plugin_u64 entry) return total; } -/* - * Time control - */ -static bool has_control; -#ifdef CONFIG_SOFTMMU -static Error *migration_blocker; -#endif - -const void *qemu_plugin_request_time_control(void) -{ - if (!has_control) { - has_control = true; -#ifdef CONFIG_SOFTMMU - error_setg(&migration_blocker, - "TCG plugin time control does not support migration"); - migrate_add_blocker(&migration_blocker, NULL); -#endif - return &has_control; - } - return NULL; -} - -#ifdef CONFIG_SOFTMMU -static void advance_virtual_time__async(CPUState *cpu, run_on_cpu_data data) -{ - int64_t new_time = data.host_ulong; - qemu_clock_advance_virtual_time(new_time); -} -#endif - -void qemu_plugin_update_ns(const void *handle, int64_t new_time) -{ -#ifdef CONFIG_SOFTMMU - if (handle == &has_control) { - /* Need to execute out of cpu_exec, so bql can be locked. */ - async_run_on_cpu(current_cpu, - advance_virtual_time__async, - RUN_ON_CPU_HOST_ULONG(new_time)); - } -#endif -} diff --git a/plugins/core.c b/plugins/core.c index 12c67b4..c6e9ef1 100644 --- a/plugins/core.c +++ b/plugins/core.c @@ -12,22 +12,15 @@ * SPDX-License-Identifier: GPL-2.0-or-later */ #include "qemu/osdep.h" -#include "qemu/error-report.h" -#include "qemu/config-file.h" -#include "qapi/error.h" #include "qemu/lockable.h" #include "qemu/option.h" #include "qemu/plugin.h" +#include "qemu/qemu-plugin.h" #include "qemu/queue.h" #include "qemu/rcu_queue.h" -#include "qemu/xxhash.h" #include "qemu/rcu.h" -#include "hw/core/cpu.h" - -#include "exec/exec-all.h" #include "exec/tb-flush.h" -#include "tcg/tcg.h" -#include "tcg/tcg-op.h" +#include "tcg/tcg-op-common.h" #include "plugin.h" struct qemu_plugin_cb { @@ -214,30 +207,49 @@ CPUPluginState *qemu_plugin_create_vcpu_state(void) static void plugin_grow_scoreboards__locked(CPUState *cpu) { - if (cpu->cpu_index < plugin.scoreboard_alloc_size) { + size_t scoreboard_size = plugin.scoreboard_alloc_size; + bool need_realloc = false; + + if (cpu->cpu_index < scoreboard_size) { return; } - bool need_realloc = FALSE; - while (cpu->cpu_index >= plugin.scoreboard_alloc_size) { - plugin.scoreboard_alloc_size *= 2; - need_realloc = TRUE; + while (cpu->cpu_index >= scoreboard_size) { + scoreboard_size *= 2; + need_realloc = true; } + if (!need_realloc) { + return; + } - if (!need_realloc || QLIST_EMPTY(&plugin.scoreboards)) { - /* nothing to do, we just updated sizes for future scoreboards */ + if (QLIST_EMPTY(&plugin.scoreboards)) { + /* just update size for future scoreboards */ + plugin.scoreboard_alloc_size = scoreboard_size; return; } + /* + * A scoreboard creation/deletion might be in progress. If a new vcpu is + * initialized at the same time, we are safe, as the new + * plugin.scoreboard_alloc_size was not yet written. + */ + qemu_rec_mutex_unlock(&plugin.lock); + /* cpus must be stopped, as tb might still use an existing scoreboard. */ start_exclusive(); - struct qemu_plugin_scoreboard *score; - QLIST_FOREACH(score, &plugin.scoreboards, entry) { - g_array_set_size(score->data, plugin.scoreboard_alloc_size); + /* re-acquire lock */ + qemu_rec_mutex_lock(&plugin.lock); + /* in case another vcpu is created between unlock and exclusive section. */ + if (scoreboard_size > plugin.scoreboard_alloc_size) { + struct qemu_plugin_scoreboard *score; + QLIST_FOREACH(score, &plugin.scoreboards, entry) { + g_array_set_size(score->data, scoreboard_size); + } + plugin.scoreboard_alloc_size = scoreboard_size; + /* force all tb to be flushed, as scoreboard pointers were changed. */ + tb_flush(cpu); } - /* force all tb to be flushed, as scoreboard pointers were changed. */ - tb_flush(cpu); end_exclusive(); } @@ -255,7 +267,9 @@ static void qemu_plugin_vcpu_init__async(CPUState *cpu, run_on_cpu_data unused) plugin_grow_scoreboards__locked(cpu); qemu_rec_mutex_unlock(&plugin.lock); + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_RW_REGS); plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_INIT); + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_NO_REGS); } void qemu_plugin_vcpu_init_hook(CPUState *cpu) @@ -268,7 +282,9 @@ void qemu_plugin_vcpu_exit_hook(CPUState *cpu) { bool success; + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_RW_REGS); plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_EXIT); + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_NO_REGS); assert(cpu->cpu_index != UNASSIGNED_CPU_INDEX); qemu_rec_mutex_lock(&plugin.lock); @@ -356,6 +372,7 @@ void plugin_register_dyn_cb__udata(GArray **arr, static TCGHelperInfo info[3] = { [QEMU_PLUGIN_CB_NO_REGS].flags = TCG_CALL_NO_RWG, [QEMU_PLUGIN_CB_R_REGS].flags = TCG_CALL_NO_WG, + [QEMU_PLUGIN_CB_RW_REGS].flags = 0, /* * Match qemu_plugin_vcpu_udata_cb_t: * void (*)(uint32_t, void *) @@ -385,6 +402,7 @@ void plugin_register_dyn_cond_cb__udata(GArray **arr, static TCGHelperInfo info[3] = { [QEMU_PLUGIN_CB_NO_REGS].flags = TCG_CALL_NO_RWG, [QEMU_PLUGIN_CB_R_REGS].flags = TCG_CALL_NO_WG, + [QEMU_PLUGIN_CB_RW_REGS].flags = 0, /* * Match qemu_plugin_vcpu_udata_cb_t: * void (*)(uint32_t, void *) @@ -423,6 +441,7 @@ void plugin_register_vcpu_mem_cb(GArray **arr, static TCGHelperInfo info[3] = { [QEMU_PLUGIN_CB_NO_REGS].flags = TCG_CALL_NO_RWG, [QEMU_PLUGIN_CB_R_REGS].flags = TCG_CALL_NO_WG, + [QEMU_PLUGIN_CB_RW_REGS].flags = 0, /* * Match qemu_plugin_vcpu_mem_cb_t: * void (*)(uint32_t, qemu_plugin_meminfo_t, uint64_t, void *) @@ -462,7 +481,9 @@ void qemu_plugin_tb_trans_cb(CPUState *cpu, struct qemu_plugin_tb *tb) QLIST_FOREACH_SAFE_RCU(cb, &plugin.cb_lists[ev], entry, next) { qemu_plugin_vcpu_tb_trans_cb_t func = cb->f.vcpu_tb_trans; + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_RW_REGS); func(cb->ctx->id, tb); + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_NO_REGS); } } @@ -487,7 +508,9 @@ qemu_plugin_vcpu_syscall(CPUState *cpu, int64_t num, uint64_t a1, uint64_t a2, QLIST_FOREACH_SAFE_RCU(cb, &plugin.cb_lists[ev], entry, next) { qemu_plugin_vcpu_syscall_cb_t func = cb->f.vcpu_syscall; + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_RW_REGS); func(cb->ctx->id, cpu->cpu_index, num, a1, a2, a3, a4, a5, a6, a7, a8); + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_NO_REGS); } } @@ -509,7 +532,9 @@ void qemu_plugin_vcpu_syscall_ret(CPUState *cpu, int64_t num, int64_t ret) QLIST_FOREACH_SAFE_RCU(cb, &plugin.cb_lists[ev], entry, next) { qemu_plugin_vcpu_syscall_ret_cb_t func = cb->f.vcpu_syscall_ret; + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_RW_REGS); func(cb->ctx->id, cpu->cpu_index, num, ret); + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_NO_REGS); } } @@ -517,14 +542,18 @@ void qemu_plugin_vcpu_idle_cb(CPUState *cpu) { /* idle and resume cb may be called before init, ignore in this case */ if (cpu->cpu_index < plugin.num_vcpus) { + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_RW_REGS); plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_IDLE); + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_NO_REGS); } } void qemu_plugin_vcpu_resume_cb(CPUState *cpu) { if (cpu->cpu_index < plugin.num_vcpus) { + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_RW_REGS); plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_RESUME); + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_NO_REGS); } } @@ -583,6 +612,8 @@ void exec_inline_op(enum plugin_dyn_cb_type type, } void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr, + uint64_t value_low, + uint64_t value_high, MemOpIdx oi, enum qemu_plugin_mem_rw rw) { GArray *arr = cpu->neg.plugin_mem_cbs; @@ -591,6 +622,10 @@ void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr, if (arr == NULL) { return; } + + cpu->neg.plugin_mem_value_low = value_low; + cpu->neg.plugin_mem_value_high = value_high; + for (i = 0; i < arr->len; i++) { struct qemu_plugin_dyn_cb *cb = &g_array_index(arr, struct qemu_plugin_dyn_cb, i); @@ -598,9 +633,13 @@ void qemu_plugin_vcpu_mem_cb(CPUState *cpu, uint64_t vaddr, switch (cb->type) { case PLUGIN_CB_MEM_REGULAR: if (rw & cb->regular.rw) { + qemu_plugin_set_cb_flags(cpu, + tcg_call_to_qemu_plugin_cb_flags(cb->regular.info->flags)); + cb->regular.f.vcpu_mem(cpu->cpu_index, make_plugin_meminfo(oi, rw), vaddr, cb->regular.userp); + qemu_plugin_set_cb_flags(cpu, QEMU_PLUGIN_CB_NO_REGS); } break; case PLUGIN_CB_INLINE_ADD_U64: @@ -743,3 +782,14 @@ void plugin_scoreboard_free(struct qemu_plugin_scoreboard *score) g_array_free(score->data, TRUE); g_free(score); } + +enum qemu_plugin_cb_flags tcg_call_to_qemu_plugin_cb_flags(int flags) +{ + if (flags & TCG_CALL_NO_RWG) { + return QEMU_PLUGIN_CB_NO_REGS; + } else if (flags & TCG_CALL_NO_WG) { + return QEMU_PLUGIN_CB_R_REGS; + } else { + return QEMU_PLUGIN_CB_RW_REGS; + } +} diff --git a/plugins/loader.c b/plugins/loader.c index ebc01da..8f0d75c 100644 --- a/plugins/loader.c +++ b/plugins/loader.c @@ -29,11 +29,8 @@ #include "qemu/xxhash.h" #include "qemu/plugin.h" #include "qemu/memalign.h" -#include "hw/core/cpu.h" +#include "qemu/target-info.h" #include "exec/tb-flush.h" -#ifndef CONFIG_USER_ONLY -#include "hw/boards.h" -#endif #include "plugin.h" @@ -128,7 +125,7 @@ static int plugin_add(void *opaque, const char *name, const char *value, /* Will treat arg="argname" as "argname=on" */ fullarg = g_strdup_printf("%s=%s", value, "on"); } else { - fullarg = g_strdup_printf("%s", value); + fullarg = g_strdup(value); } warn_report("using 'arg=%s' is deprecated", value); error_printf("Please use '%s' directly\n", fullarg); @@ -297,17 +294,11 @@ int qemu_plugin_load_list(QemuPluginList *head, Error **errp) struct qemu_plugin_desc *desc, *next; g_autofree qemu_info_t *info = g_new0(qemu_info_t, 1); - info->target_name = TARGET_NAME; + info->target_name = target_name(); info->version.min = QEMU_PLUGIN_MIN_VERSION; info->version.cur = QEMU_PLUGIN_VERSION; -#ifndef CONFIG_USER_ONLY - MachineState *ms = MACHINE(qdev_get_machine()); - info->system_emulation = true; - info->system.smp_vcpus = ms->smp.cpus; - info->system.max_vcpus = ms->smp.max_cpus; -#else - info->system_emulation = false; -#endif + + qemu_plugin_fillin_mode_info(info); QTAILQ_FOREACH_SAFE(desc, head, entry, next) { int err; @@ -379,7 +370,7 @@ static void plugin_reset_destroy(struct qemu_plugin_reset_data *data) { qemu_rec_mutex_lock(&plugin.lock); plugin_reset_destroy__locked(data); - qemu_rec_mutex_lock(&plugin.lock); + qemu_rec_mutex_unlock(&plugin.lock); } static void plugin_flush_destroy(CPUState *cpu, run_on_cpu_data arg) diff --git a/plugins/meson.build b/plugins/meson.build index 18a0303..62c991d 100644 --- a/plugins/meson.build +++ b/plugins/meson.build @@ -1,40 +1,68 @@ +if not get_option('plugins') + subdir_done() +endif + +qemu_plugin_symbols = configure_file( + input: files('../include/qemu/qemu-plugin.h'), + output: 'qemu-plugin.symbols', + capture: true, + command: [files('../scripts/qemu-plugin-symbols.py'), '@INPUT@']) + # Modules need more symbols than just those in plugins/qemu-plugins.symbols if not enable_modules if host_os == 'darwin' configure_file( - input: files('qemu-plugins.symbols'), + input: qemu_plugin_symbols, output: 'qemu-plugins-ld64.symbols', capture: true, command: ['sed', '-ne', 's/^[[:space:]]*\\(qemu_.*\\);/_\\1/p', '@INPUT@']) emulator_link_args += ['-Wl,-exported_symbols_list,plugins/qemu-plugins-ld64.symbols'] + elif host_os == 'windows' and meson.get_compiler('c').get_id() == 'clang' + # LLVM/lld does not support exporting specific symbols. However, it works + # out of the box with dllexport/dllimport attribute we set in the code. else - emulator_link_args += ['-Xlinker', '--dynamic-list=' + (meson.project_source_root() / 'plugins/qemu-plugins.symbols')] + emulator_link_args += ['-Xlinker', '--dynamic-list=' + qemu_plugin_symbols.full_path()] endif endif -if get_option('plugins') - if host_os == 'windows' - dlltool = find_program('dlltool', required: true) +if host_os == 'windows' + # Generate a .lib file for plugins to link against. + # First, create a .def file listing all the symbols a plugin should expect to have + # available in qemu + win32_plugin_def = configure_file( + input: qemu_plugin_symbols, + output: 'qemu_plugin_api.def', + capture: true, + command: [python, '-c', 'import fileinput, re; print("EXPORTS", end=""); [print(re.sub(r"[{};]", "", line), end="") for line in fileinput.input()]', '@INPUT@']) - # Generate a .lib file for plugins to link against. - # First, create a .def file listing all the symbols a plugin should expect to have - # available in qemu - win32_plugin_def = configure_file( - input: files('qemu-plugins.symbols'), - output: 'qemu_plugin_api.def', - capture: true, - command: ['sed', '-e', '0,/^/s//EXPORTS/; s/[{};]//g', '@INPUT@']) - # then use dlltool to assemble a delaylib. - win32_qemu_plugin_api_lib = configure_file( - input: win32_plugin_def, - output: 'libqemu_plugin_api.a', - command: [dlltool, '--input-def', '@INPUT@', - '--output-delaylib', '@OUTPUT@', '--dllname', 'qemu.exe'] - ) + # then use dlltool to assemble a delaylib. + # The delaylib will have an "imaginary" name (qemu.exe), that is used by the + # linker file we add with plugins (win32_linker.c) to identify that we want + # to find missing symbols in current program. + win32_qemu_plugin_api_link_flags = ['-Lplugins', '-lqemu_plugin_api'] + if meson.get_compiler('c').get_id() == 'clang' + # With LLVM/lld, delaylib is specified at link time (-delayload) + dlltool = find_program('llvm-dlltool', required: true) + dlltool_cmd = [dlltool, '-d', '@INPUT@', '-l', '@OUTPUT@', '-D', 'qemu.exe'] + win32_qemu_plugin_api_link_flags += ['-Wl,-delayload=qemu.exe'] + else + # With gcc/ld, delay lib is built with a specific delay parameter. + dlltool = find_program('dlltool', required: true) + dlltool_cmd = [dlltool, '--input-def', '@INPUT@', + '--output-delaylib', '@OUTPUT@', '--dllname', 'qemu.exe'] endif - specific_ss.add(files( - 'loader.c', - 'core.c', - 'api.c', - )) + win32_qemu_plugin_api_lib = configure_file( + input: win32_plugin_def, + output: 'libqemu_plugin_api.a', + command: dlltool_cmd + ) endif + +user_ss.add(files('user.c', 'api-user.c')) +system_ss.add(files('system.c', 'api-system.c')) + +user_ss.add(files('api.c', 'core.c')) +system_ss.add(files('api.c', 'core.c')) + +common_ss.add(files('loader.c')) + diff --git a/plugins/plugin.h b/plugins/plugin.h index 30e2299..6fbc443 100644 --- a/plugins/plugin.h +++ b/plugins/plugin.h @@ -13,6 +13,7 @@ #define PLUGIN_H #include <gmodule.h> +#include "qemu/queue.h" #include "qemu/qht.h" #define QEMU_PLUGIN_MIN_VERSION 2 @@ -118,4 +119,10 @@ struct qemu_plugin_scoreboard *plugin_scoreboard_new(size_t element_size); void plugin_scoreboard_free(struct qemu_plugin_scoreboard *score); +/** + * qemu_plugin_fillin_mode_info() - populate mode specific info + * info: pointer to qemu_info_t structure + */ +void qemu_plugin_fillin_mode_info(qemu_info_t *info); + #endif /* PLUGIN_H */ diff --git a/plugins/qemu-plugins.symbols b/plugins/qemu-plugins.symbols deleted file mode 100644 index ca773d8..0000000 --- a/plugins/qemu-plugins.symbols +++ /dev/null @@ -1,57 +0,0 @@ -{ - qemu_plugin_bool_parse; - qemu_plugin_end_code; - qemu_plugin_entry_code; - qemu_plugin_get_hwaddr; - qemu_plugin_get_registers; - qemu_plugin_hwaddr_device_name; - qemu_plugin_hwaddr_is_io; - qemu_plugin_hwaddr_phys_addr; - qemu_plugin_insn_data; - qemu_plugin_insn_disas; - qemu_plugin_insn_haddr; - qemu_plugin_insn_size; - qemu_plugin_insn_symbol; - qemu_plugin_insn_vaddr; - qemu_plugin_mem_is_big_endian; - qemu_plugin_mem_is_sign_extended; - qemu_plugin_mem_is_store; - qemu_plugin_mem_size_shift; - qemu_plugin_num_vcpus; - qemu_plugin_outs; - qemu_plugin_path_to_binary; - qemu_plugin_read_register; - qemu_plugin_register_atexit_cb; - qemu_plugin_register_flush_cb; - qemu_plugin_register_vcpu_exit_cb; - qemu_plugin_register_vcpu_idle_cb; - qemu_plugin_register_vcpu_init_cb; - qemu_plugin_register_vcpu_insn_exec_cb; - qemu_plugin_register_vcpu_insn_exec_cond_cb; - qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu; - qemu_plugin_register_vcpu_mem_cb; - qemu_plugin_register_vcpu_mem_inline_per_vcpu; - qemu_plugin_register_vcpu_resume_cb; - qemu_plugin_register_vcpu_syscall_cb; - qemu_plugin_register_vcpu_syscall_ret_cb; - qemu_plugin_register_vcpu_tb_exec_cb; - qemu_plugin_register_vcpu_tb_exec_cond_cb; - qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu; - qemu_plugin_register_vcpu_tb_trans_cb; - qemu_plugin_request_time_control; - qemu_plugin_reset; - qemu_plugin_scoreboard_free; - qemu_plugin_scoreboard_find; - qemu_plugin_scoreboard_new; - qemu_plugin_start_code; - qemu_plugin_tb_get_insn; - qemu_plugin_tb_n_insns; - qemu_plugin_tb_vaddr; - qemu_plugin_u64_add; - qemu_plugin_u64_get; - qemu_plugin_u64_set; - qemu_plugin_u64_sum; - qemu_plugin_uninstall; - qemu_plugin_update_ns; - qemu_plugin_vcpu_for_each; -}; diff --git a/plugins/system.c b/plugins/system.c new file mode 100644 index 0000000..b3ecc33 --- /dev/null +++ b/plugins/system.c @@ -0,0 +1,24 @@ +/* + * QEMU Plugin system-emulation helpers + * + * Helpers that are specific to system emulation. + * + * Copyright (C) 2017, Emilio G. Cota <cota@braap.org> + * Copyright (C) 2019-2025, Linaro + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qemu/plugin.h" +#include "hw/boards.h" + +#include "plugin.h" + +void qemu_plugin_fillin_mode_info(qemu_info_t *info) +{ + MachineState *ms = MACHINE(qdev_get_machine()); + info->system_emulation = true; + info->system.smp_vcpus = ms->smp.cpus; + info->system.max_vcpus = ms->smp.max_cpus; +} diff --git a/plugins/user.c b/plugins/user.c new file mode 100644 index 0000000..250d542 --- /dev/null +++ b/plugins/user.c @@ -0,0 +1,19 @@ +/* + * QEMU Plugin user-mode helpers + * + * Helpers that are specific to user-mode. + * + * Copyright (C) 2017, Emilio G. Cota <cota@braap.org> + * Copyright (C) 2019-2025, Linaro + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qemu/plugin.h" +#include "plugin.h" + +void qemu_plugin_fillin_mode_info(qemu_info_t *info) +{ + info->system_emulation = false; +} |