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gdbstub: C3 - protection for UART register region

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* reading the UART peripheral registers disturbs
  gdbstub because it communicates via UART.
  Hence, we protect it.

Closes IDF-2533
This commit is contained in:
Jakob Hasse
2020-12-24 19:34:51 +08:00
parent caf1e9d570
commit 4c0cf6bf62
1 changed files with 7 additions and 2 deletions
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9
components/esp_gdbstub/esp32c3/gdbstub_esp32c3.c
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@@ -22,6 +22,8 @@
#define GDBSTUB_MEM_REGION_COUNT 9 #define GDBSTUB_MEM_REGION_COUNT 9
#define UART_REG_FIELD_LEN 0x84
typedef struct { typedef struct {
intptr_t lower; intptr_t lower;
intptr_t upper; intptr_t upper;
@@ -36,8 +38,10 @@ static const mem_bound_t mem_region_table [GDBSTUB_MEM_REGION_COUNT] =
{SOC_IROM_MASK_LOW, SOC_IROM_MASK_HIGH}, {SOC_IROM_MASK_LOW, SOC_IROM_MASK_HIGH},
{SOC_DROM_MASK_LOW, SOC_DROM_MASK_HIGH}, {SOC_DROM_MASK_LOW, SOC_DROM_MASK_HIGH},
{SOC_RTC_IRAM_LOW, SOC_RTC_IRAM_HIGH}, {SOC_RTC_IRAM_LOW, SOC_RTC_IRAM_HIGH},
// RTC DRAM and RTC DATA are identical with RTC IRAM // RTC DRAM and RTC DATA are identical with RTC IRAM, hence we skip them
{SOC_PERIPHERAL_LOW, SOC_PERIPHERAL_HIGH}, // We shouldn't read the uart registers since it will disturb the debugging via UART,
// so skip UART part of the peripheral registers.
{DR_REG_UART_BASE + UART_REG_FIELD_LEN, SOC_PERIPHERAL_HIGH},
{SOC_DEBUG_LOW, SOC_DEBUG_HIGH}, {SOC_DEBUG_LOW, SOC_DEBUG_HIGH},
}; };
@@ -48,6 +52,7 @@ static inline bool check_inside_valid_region(intptr_t addr)
return true; return true;
} }
} }
return false; return false;
} }