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[Revise prev change -- this is how it's been running at Adobe, and it works

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there.]

* sparc-tdep.c (sparc_pop_frame):  Pop the fsr and csr (float and
coprocessor status regs) when popping a frame.  This fixes
float exceptions that occur after calling inferior functions.

* sparc-nat.c (fetch_inferior_registers, store_inferior_registers):
Read and write the fsr (float status register) to/from the child
process along with the float regs.  Remove Peter Schauer's change
of May 24 '93, which has higher overhead and doesn't solve the
real problem (which was that FSR wasn't being set).
This commit is contained in:
John Gilmore
1994-01-11 09:13:25 +00:00
parent c369b6a32f
commit c6d8db406c
2 changed files with 7 additions and 13 deletions
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10
gdb/ChangeLog
View File

@@ -1,10 +1,14 @@
Tue Jan 11 00:53:46 1994 John Gilmore (gnu@cygnus.com)
* sparc-tdep.c (sparc_pop_frame): Pop the fsr and csr (float and
coprocessor status regs) when popping a frame. This fixes
float exceptions that occur after calling inferior functions.
* sparc-nat.c (fetch_inferior_registers, store_inferior_registers):
Read and write the fsr (float status register) to/from the child
process. This avoids random float exceptions when running under
GDB, and probably obsoletes Peter Schauer's change of May 24 '93
(which remains for safety).
process along with the float regs. Remove Peter Schauer's change
of May 24 '93, which has higher overhead and doesn't solve the
real problem (which was that FSR wasn't being set).
Mon Jan 10 23:16:42 1994 John Gilmore (gnu@cygnus.com)

10
gdb/sparc-nat.c
View File

@@ -222,20 +222,10 @@ store_inferior_registers (regno)
if (wanna_store & FP_REGS)
{
if (!register_valid[FP0_REGNUM+9]) abort();
/* Initialize inferior_fp_registers members that gdb doesn't set
by reading them from the inferior. This may not be needed
any more, now that we set Fpu_fsr. */
if (0 !=
ptrace (PTRACE_GETFPREGS, inferior_pid,
(PTRACE_ARG3_TYPE) &inferior_fp_registers, 0))
perror("ptrace_getfpregs");
memcpy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
sizeof inferior_fp_registers.fpu_fr);
memcpy (&inferior_fp_registers.Fpu_fsr,
&registers[REGISTER_BYTE (FPS_REGNUM)], sizeof (FPU_FSR_TYPE));
if (0 !=
ptrace (PTRACE_SETFPREGS, inferior_pid,
(PTRACE_ARG3_TYPE) &inferior_fp_registers, 0))