mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
fdef8aecb7
https://pvs-studio.com/en/blog/posts/cpp/0790/#ID487F9D1F5B Reported in https://github.com/espressif/esp-idf/issues/6440
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include "esp_gdbstub_common.h"
|
|
#include "esp_cpu.h"
|
|
#include "soc/soc_memory_layout.h"
|
|
#include "xtensa/config/specreg.h"
|
|
#include "sdkconfig.h"
|
|
|
|
#if !XCHAL_HAVE_WINDOWED
|
|
#warning "gdbstub_xtensa: revisit the implementation for Call0 ABI"
|
|
#endif
|
|
|
|
extern int _invalid_pc_placeholder;
|
|
|
|
static void init_regfile(esp_gdbstub_gdb_regfile_t *dst)
|
|
{
|
|
memset(dst, 0, sizeof(*dst));
|
|
}
|
|
|
|
static void update_regfile_common(esp_gdbstub_gdb_regfile_t *dst)
|
|
{
|
|
if (dst->a[0] & 0x8000000U) {
|
|
dst->a[0] = (uint32_t)cpu_ll_pc_to_ptr(dst->a[0]);
|
|
}
|
|
if (!esp_stack_ptr_is_sane(dst->a[1])) {
|
|
dst->a[1] = 0xDEADBEEF;
|
|
}
|
|
dst->windowbase = 0;
|
|
dst->windowstart = 0x1;
|
|
RSR(CONFIGID0, dst->configid0);
|
|
RSR(CONFIGID1, dst->configid1);
|
|
}
|
|
|
|
void esp_gdbstub_frame_to_regfile(const esp_gdbstub_frame_t *frame, esp_gdbstub_gdb_regfile_t *dst)
|
|
{
|
|
init_regfile(dst);
|
|
const uint32_t *a_regs = (const uint32_t *) &frame->a0;
|
|
if (!(esp_ptr_executable(cpu_ll_pc_to_ptr(frame->pc)) && (frame->pc & 0xC0000000U))) {
|
|
/* Xtensa ABI sets the 2 MSBs of the PC according to the windowed call size
|
|
* Incase the PC is invalid, GDB will fail to translate addresses to function names
|
|
* Hence replacing the PC to a placeholder address in case of invalid PC
|
|
*/
|
|
dst->pc = (uint32_t)&_invalid_pc_placeholder;
|
|
} else {
|
|
dst->pc = (uint32_t)cpu_ll_pc_to_ptr(frame->pc);
|
|
}
|
|
|
|
for (int i = 0; i < 16; i++) {
|
|
dst->a[i] = a_regs[i];
|
|
}
|
|
for (int i = 16; i < 64; i++) {
|
|
dst->a[i] = 0xDEADBEEF;
|
|
}
|
|
|
|
#if XCHAL_HAVE_LOOPS
|
|
dst->lbeg = frame->lbeg;
|
|
dst->lend = frame->lend;
|
|
dst->lcount = frame->lcount;
|
|
#endif
|
|
|
|
dst->ps = (frame->ps & PS_UM) ? (frame->ps & ~PS_EXCM) : frame->ps;
|
|
dst->sar = frame->sar;
|
|
update_regfile_common(dst);
|
|
}
|
|
|
|
#ifdef CONFIG_ESP_GDBSTUB_SUPPORT_TASKS
|
|
|
|
static void solicited_frame_to_regfile(const XtSolFrame *frame, esp_gdbstub_gdb_regfile_t *dst)
|
|
{
|
|
init_regfile(dst);
|
|
const uint32_t *a_regs = (const uint32_t *) &frame->a0;
|
|
if (!(esp_ptr_executable(cpu_ll_pc_to_ptr(frame->pc)) && (frame->pc & 0xC0000000U))) {
|
|
dst->pc = (uint32_t)&_invalid_pc_placeholder;
|
|
} else {
|
|
dst->pc = (uint32_t)cpu_ll_pc_to_ptr(frame->pc);
|
|
}
|
|
|
|
/* only 4 registers saved in the solicited frame */
|
|
for (int i = 0; i < 4; i++) {
|
|
dst->a[i] = a_regs[i];
|
|
}
|
|
for (int i = 4; i < 64; i++) {
|
|
dst->a[i] = 0xDEADBEEF;
|
|
}
|
|
|
|
dst->ps = (frame->ps & PS_UM) ? (frame->ps & ~PS_EXCM) : frame->ps;
|
|
update_regfile_common(dst);
|
|
}
|
|
|
|
/* Represents FreeRTOS TCB structure */
|
|
typedef struct {
|
|
uint8_t *top_of_stack;
|
|
/* Other members aren't needed */
|
|
} dummy_tcb_t;
|
|
|
|
|
|
void esp_gdbstub_tcb_to_regfile(TaskHandle_t tcb, esp_gdbstub_gdb_regfile_t *dst)
|
|
{
|
|
const dummy_tcb_t *dummy_tcb = (const dummy_tcb_t *) tcb;
|
|
|
|
const XtExcFrame *frame = (XtExcFrame *) dummy_tcb->top_of_stack;
|
|
if (frame->exit != 0) {
|
|
esp_gdbstub_frame_to_regfile(frame, dst);
|
|
} else {
|
|
const XtSolFrame *taskFrame = (const XtSolFrame *) dummy_tcb->top_of_stack;
|
|
solicited_frame_to_regfile(taskFrame, dst);
|
|
}
|
|
}
|
|
|
|
#endif // CONFIG_ESP_GDBSTUB_SUPPORT_TASKS
|
|
|
|
int esp_gdbstub_get_signal(const esp_gdbstub_frame_t *frame)
|
|
{
|
|
const char exccause_to_signal[] = {4, 31, 11, 11, 2, 6, 8, 0, 6, 7, 0, 0, 7, 7, 7, 7};
|
|
if (frame->exccause >= sizeof(exccause_to_signal)) {
|
|
return 11;
|
|
}
|
|
return (int) exccause_to_signal[frame->exccause];
|
|
}
|