From 5114e29d63e1313c5c2ed65f4940a54f40a12ec3 Mon Sep 17 00:00:00 2001 From: Orjan Friberg Date: Fri, 27 May 2005 14:36:13 +0000 Subject: [PATCH] 2005-05-27 Orjan Friberg * cris-tdep.c (crisv32_scan_prologue): Add. (cris_frame_unwind_cache, cris_skip_prologue): Call crisv32_scan_prologue when debugging CRISv32. --- gdb/ChangeLog | 6 ++++++ gdb/cris-tdep.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 55 insertions(+), 2 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 79a418076f0..8abd281e25d 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,9 @@ +2005-05-27 Orjan Friberg + + * cris-tdep.c (crisv32_scan_prologue): Add. + (cris_frame_unwind_cache, cris_skip_prologue): Call + crisv32_scan_prologue when debugging CRISv32. + 2005-05-27 Orjan Friberg * cris-tdep.c (cris_sigtramp_start, cris_rt_sigtramp_start) diff --git a/gdb/cris-tdep.c b/gdb/cris-tdep.c index 53258190e2c..fd4b38ceb3d 100644 --- a/gdb/cris-tdep.c +++ b/gdb/cris-tdep.c @@ -724,6 +724,10 @@ static CORE_ADDR cris_scan_prologue (CORE_ADDR pc, struct frame_info *next_frame, struct cris_unwind_cache *info); +static CORE_ADDR crisv32_scan_prologue (CORE_ADDR pc, + struct frame_info *next_frame, + struct cris_unwind_cache *info); + static CORE_ADDR cris_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame); @@ -795,7 +799,10 @@ cris_frame_unwind_cache (struct frame_info *next_frame, info->leaf_function = 0; /* Prologue analysis does the rest... */ - cris_scan_prologue (frame_func_unwind (next_frame), next_frame, info); + if (cris_version () == 32) + crisv32_scan_prologue (frame_func_unwind (next_frame), next_frame, info); + else + cris_scan_prologue (frame_func_unwind (next_frame), next_frame, info); return info; } @@ -1375,6 +1382,42 @@ cris_scan_prologue (CORE_ADDR pc, struct frame_info *next_frame, return pc; } +static CORE_ADDR +crisv32_scan_prologue (CORE_ADDR pc, struct frame_info *next_frame, + struct cris_unwind_cache *info) +{ + ULONGEST this_base; + + /* Unlike the CRISv10 prologue scanner (cris_scan_prologue), this is not + meant to be a full-fledged prologue scanner. It is only needed for + the cases where we end up in code always lacking DWARF-2 CFI, notably: + + * PLT stubs (library calls) + * call dummys + * signal trampolines + + For those cases, it is assumed that there is no actual prologue; that + the stack pointer is not adjusted, and (as a consequence) the return + address is not pushed onto the stack. */ + + /* We only want to know the end of the prologue when next_frame and info + are NULL (called from cris_skip_prologue i.e.). */ + if (next_frame == NULL && info == NULL) + { + return pc; + } + + /* The SP is assumed to be unaltered. */ + frame_unwind_unsigned_register (next_frame, SP_REGNUM, &this_base); + info->base = this_base; + info->prev_sp = this_base; + + /* The PC is assumed to be found in SRP. */ + info->saved_regs[PC_REGNUM] = info->saved_regs[SRP_REGNUM]; + + return pc; +} + /* Advance pc beyond any function entry prologue instructions at pc to reach some "real" code. */ @@ -1397,7 +1440,11 @@ cris_skip_prologue (CORE_ADDR pc) return sal.end; } - pc_after_prologue = cris_scan_prologue (pc, NULL, NULL); + if (cris_version () == 32) + pc_after_prologue = crisv32_scan_prologue (pc, NULL, NULL); + else + pc_after_prologue = cris_scan_prologue (pc, NULL, NULL); + return pc_after_prologue; } -- 2.30.2