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disas: use result of ->read_memory_func

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This gets especially confusing if you start plugging in host addresses
from a trace and you wonder why the output keeps changing. Report when
read_memory_func fails instead of blindly disassembling the buffer
contents.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220929114231.583801-35-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2022-09-29 12:42:14 +01:00
parent 4332099f0e
commit 90bbf9d9db
2 changed files with 51 additions and 38 deletions
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18
disas.c
View file

@ -83,18 +83,18 @@ static int print_insn_objdump(bfd_vma pc, disassemble_info *info,
const char *prefix)
{
int i, n = info->buffer_length;
uint8_t *buf = g_malloc(n);
g_autofree uint8_t *buf = g_malloc(n);
info->read_memory_func(pc, buf, n, info);
for (i = 0; i < n; ++i) {
if (i % 32 == 0) {
info->fprintf_func(info->stream, "\n%s: ", prefix);
if (info->read_memory_func(pc, buf, n, info) == 0) {
for (i = 0; i < n; ++i) {
if (i % 32 == 0) {
info->fprintf_func(info->stream, "\n%s: ", prefix);
}
info->fprintf_func(info->stream, "%02x", buf[i]);
}
info->fprintf_func(info->stream, "%02x", buf[i]);
} else {
info->fprintf_func(info->stream, "unable to read memory");
}
g_free(buf);
return n;
}