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mips_m4k : Fix soft breakpoint endianess handling

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In order to compare data read from the target with some marcros or data
defined on the host, we must transform this read data from target
endianess to host endianess.
target_read_memory() gets bytes from target to the host, but keeps them in _target_
endianess. This is OK if we just want to temporary keep this data on the
host, like keeping breakpoint->orig_instr. But if we want to use this
data for any ispections and comparisons on the host side, we must
transform it to _host_ endianess, by using target_buffer_get_u32()
function.
Currently this transformation is missing, and check current_instr ==
MIPS32_SDBBP will never pass if target and host endianess differ,
because current_instr will be kept in _target_ endianess and
MIPS32_SDBBP will be kept in _host_ endianess,

The patch fix this issue by using target_buffer_get_u32() to transform current_instr to
_host_ endianess before comparison.
This commit is contained in:
Drasko DRASKOVIC 2011-07-01 21:12:54 +02:00
parent f6026a8295
commit bad3ee87ac
1 changed files with 8 additions and 0 deletions
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8
src/target/mips_m4k.c
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@ -616,6 +616,14 @@ static int mips_m4k_unset_breakpoint(struct target *target,
{
return retval;
}
/**
* target_read_memory() gets us data in _target_ endianess.
* If we want to use this data on the host for comparisons with some macros
* we must first transform it to _host_ endianess using target_buffer_get_u32().
*/
current_instr = target_buffer_get_u32(target, (uint8_t *)&current_instr);
if (current_instr == MIPS32_SDBBP)
{
if ((retval = target_write_memory(target, breakpoint->address, 4, 1,