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gdbstub: Do not use memset() on GByteArray 

Introduce gdb_get_zeroes() to fill a GByteArray with zeroes.

Fixes: a010bdbe71 ("extend GByteArray to read register helpers")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200414102427.7459-1-philmd@redhat.com>
[AJB: used slightly more gliby set_size approach]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200414200631.12799-13-alex.bennee@linaro.org>
master
Philippe Mathieu-Daudé 2020-04-14 21:06:26 +01:00 committed by Alex Bennée
parent bbc40fefce
commit 7b8c1527ae
3 changed files with 12 additions and 6 deletions
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9
include/exec/gdbstub.h
View File

@ -125,6 +125,15 @@ static inline int gdb_get_reg128(GByteArray *buf, uint64_t val_hi,
return 16;
}
static inline int gdb_get_zeroes(GByteArray *array, size_t len)
{
guint oldlen = array->len;
g_byte_array_set_size(array, oldlen + len);
memset(array->data + oldlen, 0, len);
return len;
}
/**
* gdb_get_reg_ptr: get pointer to start of last element
* @len: length of element

3
target/arm/gdbstub.c
View File

@ -47,8 +47,7 @@ int arm_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
if (gdb_has_xml) {
return 0;
}
memset(mem_buf, 0, 12);
return 12;
return gdb_get_zeroes(mem_buf, 12);
}
switch (n) {
case 24:

6
target/xtensa/gdbstub.c
View File

@ -105,8 +105,7 @@ int xtensa_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
default:
qemu_log_mask(LOG_UNIMP, "%s from reg %d of unsupported size %d\n",
__func__, n, reg->size);
memset(mem_buf, 0, reg->size);
return reg->size;
return gdb_get_zeroes(mem_buf, reg->size);
}
case xtRegisterTypeWindow: /*a*/
@ -115,8 +114,7 @@ int xtensa_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
default:
qemu_log_mask(LOG_UNIMP, "%s from reg %d of unsupported type %d\n",
__func__, n, reg->type);
memset(mem_buf, 0, reg->size);
return reg->size;
return gdb_get_zeroes(mem_buf, reg->size);
}
}