diff options
Diffstat (limited to 'gdb/gdbserver/linux-arm-low.c')
| -rw-r--r-- | gdb/gdbserver/linux-arm-low.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/gdb/gdbserver/linux-arm-low.c b/gdb/gdbserver/linux-arm-low.c index 57cb855..c4f43bb 100644 --- a/gdb/gdbserver/linux-arm-low.c +++ b/gdb/gdbserver/linux-arm-low.c @@ -750,16 +750,20 @@ arm_prepare_to_resume (struct lwp_info *lwp) } } -/* Find the next pc for a sigreturn or rt_sigreturn syscall. +/* Find the next pc for a sigreturn or rt_sigreturn syscall. In + addition, set IS_THUMB depending on whether we will return to ARM + or Thumb code. See arm-linux.h for stack layout details. */ static CORE_ADDR -arm_sigreturn_next_pc (struct regcache *regcache, int svc_number) +arm_sigreturn_next_pc (struct regcache *regcache, int svc_number, + int *is_thumb) { unsigned long sp; unsigned long sp_data; /* Offset of PC register. */ int pc_offset = 0; CORE_ADDR next_pc = 0; + CORE_ADDR cpsr; gdb_assert (svc_number == __NR_sigreturn || svc_number == __NR_rt_sigreturn); @@ -771,6 +775,10 @@ arm_sigreturn_next_pc (struct regcache *regcache, int svc_number) (*the_target->read_memory) (sp + pc_offset, (unsigned char *) &next_pc, 4); + /* Set IS_THUMB according the CPSR saved on the stack. */ + (*the_target->read_memory) (sp + pc_offset + 4, (unsigned char *) &cpsr, 4); + *is_thumb = ((cpsr & CPSR_T) != 0); + return next_pc; } @@ -812,7 +820,9 @@ get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self, CORE_ADDR pc) /* This is a sigreturn or sigreturn_rt syscall. */ if (svc_number == __NR_sigreturn || svc_number == __NR_rt_sigreturn) { - next_pc = arm_sigreturn_next_pc (regcache, svc_number); + /* SIGRETURN or RT_SIGRETURN may affect the arm thumb mode, so + update IS_THUMB. */ + next_pc = arm_sigreturn_next_pc (regcache, svc_number, &is_thumb); } /* Addresses for calling Thumb functions have the bit 0 set. */ |