From: Michael Meissner Date: Fri, 27 Dec 1996 19:58:59 +0000 (+0000) Subject: Work with new compiler frame layout X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a490f8c1306c75dfa6cd6efddede263cd558cd55;p=binutils-gdb.git Work with new compiler frame layout --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 99b61572a3e..d5ef7489673 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,15 @@ +Fri Dec 27 14:53:40 1996 Michael Meissner + + * v850-tdep.c (struct pifsr): Add cur_frameoffset field. + (v850_scan_prologue): Add debug code #ifdef'ed DEBUG. Support new + compiler prologues using register save functions and short store + instructions. + + * config/v850/tm-vm850.h ({R1,EP}_REGNUMS): New register number + defintiions for r1, ep. + (SAVE{1,2,3}_{START,END}_REGNUM): Register number definitions for + the 3 sets of saved registers. + Thu Dec 26 19:56:55 1996 Mark Alexander * valprint.c (print_longest): Don't lose upper bits diff --git a/gdb/config/v850/tm-v850.h b/gdb/config/v850/tm-v850.h index b322a3d0837..b30f39c2f7e 100644 --- a/gdb/config/v850/tm-v850.h +++ b/gdb/config/v850/tm-v850.h @@ -39,12 +39,20 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #define REGISTER_SIZE 4 #define MAX_REGISTER_RAW_SIZE 4 +#define R1_REGNUM 1 +#define SAVE1_START_REGNUM 2 +#define SAVE1_END_REGNUM 2 #define SP_REGNUM 3 #define ARG0_REGNUM 6 #define ARGLAST_REGNUM 9 #define V0_REGNUM 10 #define V1_REGNUM 11 +#define SAVE2_START_REGNUM 20 +#define SAVE2_END_REGNUM 29 #define FP_REGNUM 29 +#define EP_REGNUM 30 +#define SAVE3_START_REGNUM 31 +#define SAVE3_END_REGNUM 31 #define RP_REGNUM 31 #define PS_REGNUM 37 #define PC_REGNUM 64 diff --git a/gdb/v850-tdep.c b/gdb/v850-tdep.c index ac3e13caafa..b79221ab724 100644 --- a/gdb/v850-tdep.c +++ b/gdb/v850-tdep.c @@ -34,6 +34,7 @@ struct pifsr /* Info about one saved reg */ { int framereg; /* Frame reg (SP or FP) */ int offset; /* Offset from framereg */ + int cur_frameoffset; /* Current frameoffset */ int reg; /* Saved register number */ }; @@ -63,9 +64,13 @@ v850_scan_prologue (pc, pi) struct prologue_info *pi; { CORE_ADDR func_addr, prologue_end, current_pc; - struct pifsr *pifsr; + struct pifsr *pifsr, *pifsr_tmp; int fp_used; int ep_used; + int reg; + CORE_ADDR save_pc, save_end; + int regsave_func_p; + int current_sp_size; /* First, figure out the bounds of the prologue so that we can limit the search to something reasonable. */ @@ -107,58 +112,143 @@ v850_scan_prologue (pc, pi) fp_used = 0; ep_used = 0; pifsr = pi->pifsrs; + regsave_func_p = 0; + save_pc = 0; + save_end = 0; + +#ifdef DEBUG + printf_filtered ("Current_pc = 0x%.8lx, prologue_end = 0x%.8lx\n", + (long)func_addr, (long)prologue_end); +#endif for (current_pc = func_addr; current_pc < prologue_end; current_pc += 2) { int insn; +#ifdef DEBUG + printf_filtered ("0x%.8lx ", (long)current_pc); + (*tm_print_insn) (current_pc, &tm_print_insn_info); +#endif + insn = read_memory_unsigned_integer (current_pc, 2); - if ((insn & 0x07c0) == 0x0780 /* jarl or jr */ - || (insn & 0xffe0) == 0x0060 /* jmp */ - || (insn & 0x0780) == 0x0580) /* branch */ - break; /* Ran into end of prologue */ - if ((insn & 0xffe0) == ((SP_REGNUM << 11) | 0x0240)) /* add ,sp */ - pi->frameoffset = ((insn & 0x1f) ^ 0x10) - 0x10; - else if (insn == ((SP_REGNUM << 11) | 0x0600 | SP_REGNUM)) /* addi ,sp,sp */ - pi->frameoffset = read_memory_integer (current_pc + 2, 2); - else if (insn == ((FP_REGNUM << 11) | 0x0000 | 12)) /* mov r12,fp */ + if ((insn & 0xffc0) == ((10 << 11) | 0x0780) && !regsave_func_p) + { /* jarl ,10 */ + long low_disp = read_memory_unsigned_integer (current_pc + 2, 2) & ~ (long) 1; + long disp = (((((insn & 0x3f) << 16) + low_disp) + & ~ (long) 1) ^ 0x00200000) - 0x00200000; + + save_pc = current_pc; + save_end = prologue_end; + regsave_func_p = 1; + current_pc += disp - 2; + prologue_end = (current_pc + + (2 * 3) /* moves to/from ep */ + + 4 /* addi ,sp,sp */ + + 2 /* jmp [r10] */ + + (2 * 12) /* sst.w to save r2, r20-r29, r31 */ + + 20); /* slop area */ + +#ifdef DEBUG + printf_filtered ("\tfound jarl ,r10, disp = %ld, low_disp = %ld, new pc = 0x%.8lx\n", + disp, low_disp, (long)current_pc + 2); +#endif + continue; + } + else if ((insn & 0xffe0) == 0x0060 && regsave_func_p) + { /* jmp after processing register save function */ + current_pc = save_pc + 2; + prologue_end = save_end; + regsave_func_p = 0; +#ifdef DEBUG + printf_filtered ("\tfound jmp after regsave func"); +#endif + } + else if ((insn & 0x07c0) == 0x0780 /* jarl or jr */ + || (insn & 0xffe0) == 0x0060 /* jmp */ + || (insn & 0x0780) == 0x0580) /* branch */ + { +#ifdef DEBUG + printf_filtered ("\n"); +#endif + break; /* Ran into end of prologue */ + } + + else if ((insn & 0xffe0) == ((SP_REGNUM << 11) | 0x0240)) /* add ,sp */ + pi->frameoffset += ((insn & 0x1f) ^ 0x10) - 0x10; + else if (insn == ((SP_REGNUM << 11) | 0x0600 | SP_REGNUM)) /* addi ,sp,sp */ + pi->frameoffset += read_memory_integer (current_pc + 2, 2); + else if (insn == ((FP_REGNUM << 11) | 0x0000 | SP_REGNUM)) /* mov sp,fp */ { fp_used = 1; pi->framereg = FP_REGNUM; } - else if (insn == 0xf003) /* mov sp,ep */ + + else if (insn == ((EP_REGNUM << 11) | 0x0000 | SP_REGNUM)) /* mov sp,ep */ ep_used = 1; - else if (insn == 0xf001) /* mov r1,ep */ + else if (insn == ((EP_REGNUM << 11) | 0x0000 | R1_REGNUM)) /* mov r1,ep */ ep_used = 0; else if (((insn & 0x07ff) == (0x0760 | SP_REGNUM) /* st.w ,[sp] */ || (fp_used && (insn & 0x07ff) == (0x0760 | FP_REGNUM))) /* st.w ,[fp] */ - && pifsr) + && pifsr + && (((reg = (insn >> 11) & 0x1f) >= SAVE1_START_REGNUM && reg <= SAVE1_END_REGNUM) + || (reg >= SAVE2_START_REGNUM && reg <= SAVE2_END_REGNUM) + || (reg >= SAVE3_START_REGNUM && reg <= SAVE3_END_REGNUM))) { - pifsr->framereg = insn & 0x1f; - pifsr->reg = (insn >> 11) & 0x1f; /* Extract */ + pifsr->reg = reg; pifsr->offset = read_memory_integer (current_pc + 2, 2) & ~1; + pifsr->cur_frameoffset = pi->frameoffset; +#ifdef DEBUG + printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset); +#endif pifsr++; } - else if (ep_used /* sst.w ,[ep] */ + else if (ep_used /* sst.w ,[ep] */ && ((insn & 0x0781) == 0x0501) - && pifsr) + && pifsr + && (((reg = (insn >> 11) & 0x1f) >= SAVE1_START_REGNUM && reg <= SAVE1_END_REGNUM) + || (reg >= SAVE2_START_REGNUM && reg <= SAVE2_END_REGNUM) + || (reg >= SAVE3_START_REGNUM && reg <= SAVE3_END_REGNUM))) { - pifsr->framereg = 3; - pifsr->reg = (insn >> 11) & 0x1f; /* Extract */ - pifsr->offset = (insn & 0x007e) << 2; + pifsr->reg = reg; + pifsr->offset = (insn & 0x007e) << 1; + pifsr->cur_frameoffset = pi->frameoffset; +#ifdef DEBUG + printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset); +#endif pifsr++; } if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */ current_pc += 2; + +#ifdef DEBUG + printf_filtered ("\n"); +#endif } if (pifsr) pifsr->framereg = 0; /* Tie off last entry */ + /* Fix up any offsets to the final offset. If a frame pointer was created, use it + instead of the stack pointer. */ + for (pifsr_tmp = pi->pifsrs; pifsr_tmp && pifsr_tmp != pifsr; pifsr_tmp++) + { + pifsr_tmp->offset -= pi->frameoffset - pifsr_tmp->cur_frameoffset; + pifsr_tmp->framereg = pi->framereg; + +#ifdef DEBUG + printf_filtered ("Saved register r%d, offset = %d, framereg = r%d\n", + pifsr_tmp->reg, pifsr_tmp->offset, pifsr_tmp->framereg); +#endif + } + +#ifdef DEBUG + printf_filtered ("Framereg = r%d, frameoffset = %d\n", pi->framereg, pi->frameoffset); +#endif + return current_pc; }