diff options
Diffstat (limited to 'gdb/xtensa-tdep.c')
| -rw-r--r-- | gdb/xtensa-tdep.c | 90 |
1 files changed, 52 insertions, 38 deletions
diff --git a/gdb/xtensa-tdep.c b/gdb/xtensa-tdep.c index 93226fe..c3ed283 100644 --- a/gdb/xtensa-tdep.c +++ b/gdb/xtensa-tdep.c @@ -116,7 +116,8 @@ static int xtensa_debug_level = 0; #define PS_WOE (1<<18) #define PS_EXC (1<<4) -/* Convert a live A-register number to the corresponding AR-register number. */ +/* Convert a live A-register number to the corresponding AR-register + number. */ static int arreg_number (struct gdbarch *gdbarch, int a_regnum, ULONGEST wb) { @@ -890,10 +891,11 @@ typedef struct xtensa_windowed_frame_cache { int wb; /* WINDOWBASE of the previous frame. */ int callsize; /* Call size of this frame. */ - int ws; /* WINDOWSTART of the previous frame. It keeps track of - life windows only. If there is no bit set for the - window, that means it had been already spilled - because of window overflow. */ + int ws; /* WINDOWSTART of the previous frame. It + keeps track of life windows only. If there + is no bit set for the window, that means it + had been already spilled because of window + overflow. */ /* Spilled A-registers from the previous frame. AREGS[i] == -1, if corresponding AR is alive. */ @@ -902,7 +904,8 @@ typedef struct xtensa_windowed_frame_cache /* Call0 ABI Definitions. */ -#define C0_MAXOPDS 3 /* Maximum number of operands for prologue analysis. */ +#define C0_MAXOPDS 3 /* Maximum number of operands for prologue + analysis. */ #define C0_NREGS 16 /* Number of A-registers to track. */ #define C0_CLESV 12 /* Callee-saved registers are here and up. */ #define C0_SP 1 /* Register used as SP. */ @@ -929,8 +932,9 @@ typedef struct xtensa_c0reg int fr_reg; /* original register from which register content is derived, or C0_CONST, or C0_INEXP. */ int fr_ofs; /* constant offset from reg, or immediate value. */ - int to_stk; /* offset from original SP to register (4-byte aligned), - or C0_NOSTK if register has not been saved. */ + int to_stk; /* offset from original SP to register (4-byte + aligned), or C0_NOSTK if register has not + been saved. */ } xtensa_c0reg_t; @@ -938,7 +942,8 @@ typedef struct xtensa_c0reg typedef struct xtensa_call0_frame_cache { int c0_frmsz; /* Stack frame size. */ - int c0_hasfp; /* Current frame uses frame pointer. */ + int c0_hasfp; /* Current frame uses frame + pointer. */ int fp_regnum; /* A-register used as FP. */ int c0_fp; /* Actual value of frame pointer. */ xtensa_c0reg_t c0_rt[C0_NREGS]; /* Register tracking information. */ @@ -1116,7 +1121,7 @@ xtensa_scan_prologue (struct gdbarch *gdbarch, CORE_ADDR current_pc) unsigned int register_operand; /* Possible candidate for setting frame pointer - from A1. This is what we are looking for. */ + from A1. This is what we are looking for. */ if (xtensa_operand_get_field (isa, opc, 1, ifmt, is, slot, ®ister_operand) != 0) @@ -1132,7 +1137,8 @@ xtensa_scan_prologue (struct gdbarch *gdbarch, CORE_ADDR current_pc) ®ister_operand) != 0) RETURN_FP; - fp_regnum = gdbarch_tdep (gdbarch)->a0_base + register_operand; + fp_regnum + = gdbarch_tdep (gdbarch)->a0_base + register_operand; RETURN_FP; } } @@ -1166,8 +1172,7 @@ done: cache->base = SP (or best guess about FP) of this frame; cache->pc = entry-PC (entry point of the frame function); - cache->prev_sp = SP of the previous frame. -*/ + cache->prev_sp = SP of the previous frame. */ static void call0_frame_cache (struct frame_info *this_frame, @@ -1278,8 +1283,9 @@ xtensa_frame_cache (struct frame_info *this_frame, void **this_cache) } if ((cache->prev_sp == 0) && ( ra != 0 )) - /* If RA is equal to 0 this frame is an outermost frame. Leave - cache->prev_sp unchanged marking the boundary of the frame stack. */ + /* If RA is equal to 0 this frame is an outermost frame. + Leave cache->prev_sp unchanged marking the boundary of the + frame stack. */ { if ((cache->wd.ws & (1 << cache->wd.wb)) == 0) { @@ -1296,7 +1302,8 @@ xtensa_frame_cache (struct frame_info *this_frame, void **this_cache) (gdbarch, gdbarch_tdep (gdbarch)->a0_base + 1, cache->wd.wb); - cache->prev_sp = get_frame_register_unsigned (this_frame, regnum); + cache->prev_sp = get_frame_register_unsigned (this_frame, + regnum); } } } @@ -1406,7 +1413,8 @@ xtensa_frame_prev_register (struct frame_info *this_frame, spe = cache->c0.c0_fp - cache->c0.c0_rt[cache->c0.fp_regnum].fr_ofs; - return frame_unwind_got_memory (this_frame, regnum, spe + stkofs); + return frame_unwind_got_memory (this_frame, regnum, + spe + stkofs); } } } @@ -1472,7 +1480,8 @@ xtensa_extract_return_value (struct type *type, /* On Xtensa, we can return up to 4 words (or 2 for call12). */ if (len > (callsize > 8 ? 8 : 16)) internal_error (__FILE__, __LINE__, - _("cannot extract return value of %d bytes long"), len); + _("cannot extract return value of %d bytes long"), + len); /* Get the register offset of the return register (A2) in the caller window. */ @@ -1612,8 +1621,8 @@ xtensa_push_dummy_call (struct gdbarch *gdbarch, int align; /* alignment */ union { - int offset; /* stack offset if on stack */ - int regno; /* regno if in register */ + int offset; /* stack offset if on stack. */ + int regno; /* regno if in register. */ } u; }; @@ -1912,7 +1921,8 @@ typedef enum { c0opc_mov, /* Moving a register to a register. */ c0opc_movi, /* Moving an immediate to a register. */ c0opc_l32r, /* Loading a literal. */ - c0opc_s32i, /* Storing word at fixed offset from a base register. */ + c0opc_s32i, /* Storing word at fixed offset from a base + register. */ c0opc_NrOf /* Number of opcode classifications. */ } xtensa_insn_kind; @@ -2216,7 +2226,8 @@ call0_analyze_prologue (struct gdbarch *gdbarch, goto done; opc = xtensa_opcode_decode (isa, ifmt, is, slot); - DEBUGVERB ("[call0_analyze_prologue] instr addr = 0x%08x, opc = %d\n", + DEBUGVERB ("[call0_analyze_prologue] instr " + "addr = 0x%08x, opc = %d\n", (unsigned)ia, opc); if (opc == XTENSA_UNDEFINED) opclass = c0opc_illegal; @@ -2302,7 +2313,8 @@ done: static void call0_frame_cache (struct frame_info *this_frame, - xtensa_frame_cache_t *cache, CORE_ADDR pc, CORE_ADDR litbase) + xtensa_frame_cache_t *cache, + CORE_ADDR pc, CORE_ADDR litbase) { struct gdbarch *gdbarch = get_frame_arch (this_frame); enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); @@ -2382,21 +2394,23 @@ analysis failed in this frame. GDB command execution stopped.")); else if (cache->c0.c0_rt[C0_RA].fr_reg == C0_CONST && cache->c0.c0_rt[C0_RA].fr_ofs == 0) { - /* Special case for terminating backtrace at a function that wants to - be seen as the outermost. Such a function will clear it's RA (A0) - register to 0 in the prologue instead of saving its original value. */ + /* Special case for terminating backtrace at a function that + wants to be seen as the outermost. Such a function will + clear it's RA (A0) register to 0 in the prologue instead of + saving its original value. */ ra = 0; } else { - /* RA was copied to another register or (before any function call) may - still be in the original RA register. This is not always reliable: - even in a leaf function, register tracking stops after prologue, and - even in prologue, non-prologue instructions (not tracked) may overwrite - RA or any register it was copied to. If likely in prologue or before - any call, use retracking info and hope for the best (compiler should - have saved RA in stack if not in a leaf function). If not in prologue, - too bad. */ + /* RA was copied to another register or (before any function + call) may still be in the original RA register. This is not + always reliable: even in a leaf function, register tracking + stops after prologue, and even in prologue, non-prologue + instructions (not tracked) may overwrite RA or any register + it was copied to. If likely in prologue or before any call, + use retracking info and hope for the best (compiler should + have saved RA in stack if not in a leaf function). If not in + prologue, too bad. */ int i; for (i = 0; @@ -2667,7 +2681,7 @@ xtensa_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_register_name (gdbarch, xtensa_register_name); set_gdbarch_register_type (gdbarch, xtensa_register_type); - /* To call functions from GDB using dummy frame */ + /* To call functions from GDB using dummy frame. */ set_gdbarch_push_dummy_call (gdbarch, xtensa_push_dummy_call); set_gdbarch_believe_pcc_promotion (gdbarch, 1); @@ -2736,9 +2750,9 @@ _initialize_xtensa_tdep (void) add_setshow_zinteger_cmd ("xtensa", class_maintenance, - &xtensa_debug_level, _("\ -Set Xtensa debugging."), _("\ -Show Xtensa debugging."), _("\ + &xtensa_debug_level, + _("Set Xtensa debugging."), + _("Show Xtensa debugging."), _("\ When non-zero, Xtensa-specific debugging is enabled. \ Can be 1, 2, 3, or 4 indicating the level of debugging."), NULL, |