While debugging an application with GDB the following might happen:
(gdb) return
Make xxx return now? (y or n) y
Could not fetch register "fflags"; remote failure reply 'E14'
This is because riscv_gdb_get_fpu calls riscv_csrrw_debug with a wrong csr
number (8). It should use the csr_register_map in order to reach the
riscv_cpu_get_fflags callback.
Signed-off-by: KONRAD Frederic <address@hidden>
---
target/riscv/gdbstub.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c
index 27be932..ded140e 100644
--- a/target/riscv/gdbstub.c
+++ b/target/riscv/gdbstub.c
@@ -313,7 +313,8 @@ static int riscv_gdb_get_fpu(CPURISCVState *env, uint8_t
*mem_buf, int n)
* register 33, so we recalculate the map index.
* This also works for CSR_FRM and CSR_FCSR.
*/
- result = riscv_csrrw_debug(env, n - 33 + 8, &val, 0, 0);
+ result = riscv_csrrw_debug(env, n - 33 + csr_register_map[8], &val,
+ 0, 0);
if (result == 0) {
return gdb_get_regl(mem_buf, val);
}
@@ -335,7 +336,8 @@ static int riscv_gdb_set_fpu(CPURISCVState *env, uint8_t
*mem_buf, int n)
* register 33, so we recalculate the map index.
* This also works for CSR_FRM and CSR_FCSR.
*/
- result = riscv_csrrw_debug(env, n - 33 + 8, NULL, val, -1);
+ result = riscv_csrrw_debug(env, n - 33 + csr_register_map[8], NULL,
+ val, -1);
if (result == 0) {
return sizeof(target_ulong);
}