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gdbstub: implemented 'm' 'M' memory commands

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vhaudiquet 2023-10-08 16:11:41 +02:00
parent 629fa5fc56
commit afc68c1c96
1 changed files with 39 additions and 0 deletions
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39
src/gdbstub/gdbstub.c
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@ -1,6 +1,8 @@
#include "gdbstub.h"
#include "cpu/rv32cpu.h"
#include "memory/memory.h"
#include "memory/mmu/mmu.h"
#include <errno.h>
#include <stdlib.h>
@ -218,6 +220,43 @@ void gdbstub_thread_gdb()
gdbstub_send_packet("OK", 2);
}
else if(packet[0] == 'm')
{
// m : read memory at address,length
uint32_t address;
uint32_t length;
sscanf(packet + 1, "%x,%x", &address, &length);
char data[length * 2 + 1];
for(size_t i = 0; i < length; i++)
{
uint32_t value = memory[mmu_translate(address + i)];
snprintf(data + i * 2, 3, "%02x", value);
}
gdbstub_send_packet(data, length * 2);
}
else if(packet[0] == 'M')
{
// M : write memory at address,length:data
uint32_t address;
uint32_t length;
sscanf(packet + 1, "%x,%x:", &address, &length);
uint32_t data_start = 1;
while(*(packet + data_start) != ':')
data_start++;
data_start++;
for(size_t i = 0; i < length; i++)
{
uint32_t value;
sscanf(packet + data_start + i * 2, "%02x", &value);
memory[mmu_translate(address + i)] = value;
}
gdbstub_send_packet("OK", 2);
}
else if(packet[0] == 's')
{
// s : single-step