Clang ignores that xds110_swd_write_reg() is always called with
bit SWD_CMD_RNW in 'cmd' set to zero.
It then complains that the local variable 'value' gets passed by
address to xds110_swd_queue_cmd() and in case of 'read request'
such stack address get stored for later use:
src/jtag/drivers/xds110.c:1363:1: warning: Address of
stack memory associated with local variable 'value' is
still referred to by the global variable 'xds110' upon
returning to the caller. This will be a dangling
reference [core.StackAddressEscape]
To both xds110_swd_write_reg() and xds110_swd_read_reg(), add an
assert() to inform Clang about the state of bit SWD_CMD_RNW.
Change-Id: I7687c055ec71424b642e152f478723a930966e3a
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7380
Tested-by: jenkins
static void xds110_swd_read_reg(uint8_t cmd, uint32_t *value,
uint32_t ap_delay_clk)
{
+ assert(cmd & SWD_CMD_RNW);
xds110_swd_queue_cmd(cmd, value);
}
static void xds110_swd_write_reg(uint8_t cmd, uint32_t value,
uint32_t ap_delay_clk)
{
+ assert(!(cmd & SWD_CMD_RNW));
xds110_swd_queue_cmd(cmd, &value);
}
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