From 96ff0de4abba5637804bdf7fea3f265e4e1ad361 Mon Sep 17 00:00:00 2001 From: Elena Zannoni Date: Thu, 22 Aug 2002 22:26:41 +0000 Subject: [PATCH] 2002-08-22 Elena Zannoni * rs6000-tdep.c (struct rs6000_framedata): Add saved_ev and ev_offset fields. (skip_prologue): Add support for BookE/e500 instructions. (e500_extract_return_value): New function. (frame_get_saved_regs): Add support for saving ev registers and pseudo gpr's. (e500_store_return_value): New function. (rs6000_gdbarch_init): Move up default intializations of deprecated_extract_return_value and store_return_value. Overwrite init of store_return_value with e500 specific version. Set extract_return_value for e500. --- gdb/ChangeLog | 14 +++ gdb/rs6000-tdep.c | 223 ++++++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 228 insertions(+), 9 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index f49ba9bb204..5c047fc876e 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,17 @@ +2002-08-22 Elena Zannoni + + * rs6000-tdep.c (struct rs6000_framedata): Add saved_ev and + ev_offset fields. + (skip_prologue): Add support for BookE/e500 instructions. + (e500_extract_return_value): New function. + (frame_get_saved_regs): Add support for saving ev registers and + pseudo gpr's. + (e500_store_return_value): New function. + (rs6000_gdbarch_init): Move up default intializations of + deprecated_extract_return_value and store_return_value. Overwrite + init of store_return_value with e500 specific version. + Set extract_return_value for e500. + 2002-08-22 Elena Zannoni * blockframe.c (generic_call_dummy_register_unwind): Use diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c index 1878bcb4223..766d0340936 100644 --- a/gdb/rs6000-tdep.c +++ b/gdb/rs6000-tdep.c @@ -67,12 +67,14 @@ struct rs6000_framedata int saved_gpr; /* smallest # of saved gpr */ int saved_fpr; /* smallest # of saved fpr */ int saved_vr; /* smallest # of saved vr */ + int saved_ev; /* smallest # of saved ev */ int alloca_reg; /* alloca register number (frame ptr) */ char frameless; /* true if frameless functions. */ char nosavedpc; /* true if pc not saved. */ int gpr_offset; /* offset of saved gprs from prev sp */ int fpr_offset; /* offset of saved fprs from prev sp */ int vr_offset; /* offset of saved vrs from prev sp */ + int ev_offset; /* offset of saved evs from prev sp */ int lr_offset; /* offset of saved lr */ int cr_offset; /* offset of saved cr */ int vrsave_offset; /* offset of saved vrsave register */ @@ -359,11 +361,13 @@ rs6000_software_single_step (enum target_signal signal, - saved_gpr is the number of the first saved gpr. - saved_fpr is the number of the first saved fpr. - saved_vr is the number of the first saved vr. + - saved_ev is the number of the first saved ev. - alloca_reg is the number of the register used for alloca() handling. Otherwise -1. - gpr_offset is the offset of the first saved gpr from the previous frame. - fpr_offset is the offset of the first saved fpr from the previous frame. - vr_offset is the offset of the first saved vr from the previous frame. + - ev_offset is the offset of the first saved ev from the previous frame. - lr_offset is the offset of the saved lr - cr_offset is the offset of the saved cr - vrsave_offset is the offset of the saved vrsave register @@ -441,13 +445,16 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) int lr_reg = -1; int cr_reg = -1; int vr_reg = -1; + int ev_reg = -1; + long ev_offset = 0; int vrsave_reg = -1; int reg; int framep = 0; int minimal_toc_loaded = 0; int prev_insn_was_prologue_insn = 1; int num_skip_non_prologue_insns = 0; - + const struct bfd_arch_info *arch_info = gdbarch_bfd_arch_info (current_gdbarch); + /* Attempt to find the end of the prologue when no limit is specified. Note that refine_prologue_limit() has been written so that it may be used to "refine" the limits of non-zero PC values too, but this @@ -467,6 +474,7 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) fdata->saved_gpr = -1; fdata->saved_fpr = -1; fdata->saved_vr = -1; + fdata->saved_ev = -1; fdata->alloca_reg = -1; fdata->frameless = 1; fdata->nosavedpc = 1; @@ -533,7 +541,7 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) } else if ((op & 0xffff0000) == 0x60000000) { - /* nop */ + /* nop */ /* Allow nops in the prologue, but do not consider them to be part of the prologue unless followed by other prologue instructions. */ @@ -647,7 +655,7 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) else if ((op & 0xfc0007fe) == 0x7c000378 && /* mr(.) Rx,Ry */ (((op >> 21) & 31) >= 3) && /* R3 >= Ry >= R10 */ (((op >> 21) & 31) <= 10) && - (((op >> 16) & 31) >= fdata->saved_gpr)) /* Rx: local var reg */ + ((long) ((op >> 16) & 31) >= fdata->saved_gpr)) /* Rx: local var reg */ { continue; @@ -728,7 +736,9 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) in a pair of insns to save the vector registers on the stack. */ /* 001110 00000 00000 iiii iiii iiii iiii */ - else if ((op & 0xffff0000) == 0x38000000) /* li r0, SIMM */ + /* 001110 01110 00000 iiii iiii iiii iiii */ + else if ((op & 0xffff0000) == 0x38000000 /* li r0, SIMM */ + || (op & 0xffff0000) == 0x39c00000) /* li r14, SIMM */ { li_found_pc = pc; vr_saved_offset = SIGNED_SHORT (op); @@ -754,6 +764,104 @@ skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) } } /* End AltiVec related instructions. */ + + /* Start BookE related instructions. */ + /* Store gen register S at (r31+uimm). + Any register less than r13 is volatile, so we don't care. */ + /* 000100 sssss 11111 iiiii 01100100001 */ + else if (arch_info->mach == bfd_mach_ppc_e500 + && (op & 0xfc1f07ff) == 0x101f0321) /* evstdd Rs,uimm(R31) */ + { + if ((op & 0x03e00000) >= 0x01a00000) /* Rs >= r13 */ + { + unsigned int imm; + ev_reg = GET_SRC_REG (op); + imm = (op >> 11) & 0x1f; + ev_offset = imm * 8; + /* If this is the first vector reg to be saved, or if + it has a lower number than others previously seen, + reupdate the frame info. */ + if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) + { + fdata->saved_ev = ev_reg; + fdata->ev_offset = ev_offset + offset; + } + } + continue; + } + /* Store gen register rS at (r1+rB). */ + /* 000100 sssss 00001 bbbbb 01100100000 */ + else if (arch_info->mach == bfd_mach_ppc_e500 + && (op & 0xffe007ff) == 0x13e00320) /* evstddx RS,R1,Rb */ + { + if (pc == (li_found_pc + 4)) + { + ev_reg = GET_SRC_REG (op); + /* If this is the first vector reg to be saved, or if + it has a lower number than others previously seen, + reupdate the frame info. */ + /* We know the contents of rB from the previous instruction. */ + if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) + { + fdata->saved_ev = ev_reg; + fdata->ev_offset = vr_saved_offset + offset; + } + vr_saved_offset = -1; + ev_reg = -1; + li_found_pc = 0; + } + continue; + } + /* Store gen register r31 at (rA+uimm). */ + /* 000100 11111 aaaaa iiiii 01100100001 */ + else if (arch_info->mach == bfd_mach_ppc_e500 + && (op & 0xffe007ff) == 0x13e00321) /* evstdd R31,Ra,UIMM */ + { + /* Wwe know that the source register is 31 already, but + it can't hurt to compute it. */ + ev_reg = GET_SRC_REG (op); + ev_offset = ((op >> 11) & 0x1f) * 8; + /* If this is the first vector reg to be saved, or if + it has a lower number than others previously seen, + reupdate the frame info. */ + if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) + { + fdata->saved_ev = ev_reg; + fdata->ev_offset = ev_offset + offset; + } + + continue; + } + /* Store gen register S at (r31+r0). + Store param on stack when offset from SP bigger than 4 bytes. */ + /* 000100 sssss 11111 00000 01100100000 */ + else if (arch_info->mach == bfd_mach_ppc_e500 + && (op & 0xfc1fffff) == 0x101f0320) /* evstddx Rs,R31,R0 */ + { + if (pc == (li_found_pc + 4)) + { + if ((op & 0x03e00000) >= 0x01a00000) + { + ev_reg = GET_SRC_REG (op); + /* If this is the first vector reg to be saved, or if + it has a lower number than others previously seen, + reupdate the frame info. */ + /* We know the contents of r0 from the previous + instruction. */ + if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) + { + fdata->saved_ev = ev_reg; + fdata->ev_offset = vr_saved_offset + offset; + } + ev_reg = -1; + } + vr_saved_offset = -1; + li_found_pc = 0; + continue; + } + } + /* End BookE related instructions. */ + else { /* Not a recognized prologue instruction. @@ -1141,6 +1249,62 @@ ppc_push_return_address (CORE_ADDR pc, CORE_ADDR sp) /* Extract a function return value of type TYPE from raw register array REGBUF, and copy that return value into VALBUF in virtual format. */ +static void +e500_extract_return_value (struct type *valtype, struct regcache *regbuf, char *valbuf) +{ + int offset = 0; + int vallen = TYPE_LENGTH (valtype); + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); + + if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY + && vallen == 8 + && TYPE_VECTOR (valtype)) + { + regcache_raw_read (regbuf, tdep->ppc_ev0_regnum + 3, valbuf); + } + else + { + /* Return value is copied starting from r3. Note that r3 for us + is a pseudo register. */ + int offset = 0; + int return_regnum = tdep->ppc_gp0_regnum + 3; + int reg_size = REGISTER_RAW_SIZE (return_regnum); + int reg_part_size; + char *val_buffer; + int copied = 0; + int i = 0; + + /* Compute where we will start storing the value from. */ + if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) + { + if (vallen <= reg_size) + offset = reg_size - vallen; + else + offset = reg_size + (reg_size - vallen); + } + + /* How big does the local buffer need to be? */ + if (vallen <= reg_size) + val_buffer = alloca (reg_size); + else + val_buffer = alloca (vallen); + + /* Read all we need into our private buffer. We copy it in + chunks that are as long as one register, never shorter, even + if the value is smaller than the register. */ + while (copied < vallen) + { + reg_part_size = REGISTER_RAW_SIZE (return_regnum + i); + /* It is a pseudo/cooked register. */ + regcache_cooked_read (regbuf, return_regnum + i, + val_buffer + copied); + copied += reg_part_size; + i++; + } + /* Put the stuff in the return buffer. */ + memcpy (valbuf, val_buffer + offset, vallen); + } +} static void rs6000_extract_return_value (struct type *valtype, char *regbuf, char *valbuf) @@ -1394,9 +1558,11 @@ frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap) if (fdatap->saved_fpr == 0 && fdatap->saved_gpr == 0 && fdatap->saved_vr == 0 + && fdatap->saved_ev == 0 && fdatap->lr_offset == 0 && fdatap->cr_offset == 0 - && fdatap->vr_offset == 0) + && fdatap->vr_offset == 0 + && fdatap->ev_offset == 0) frame_addr = 0; else /* NOTE: cagney/2002-04-14: The ->frame points to the inner-most @@ -1450,6 +1616,23 @@ frame_get_saved_regs (struct frame_info *fi, struct rs6000_framedata *fdatap) } } + /* if != -1, fdatap->saved_ev is the smallest number of saved_ev. + All vr's from saved_ev to ev31 are saved. ????? */ + if (tdep->ppc_ev0_regnum != -1 && tdep->ppc_ev31_regnum != -1) + { + if (fdatap->saved_ev >= 0) + { + int i; + CORE_ADDR ev_addr = frame_addr + fdatap->ev_offset; + for (i = fdatap->saved_ev; i < 32; i++) + { + fi->saved_regs[tdep->ppc_ev0_regnum + i] = ev_addr; + fi->saved_regs[tdep->ppc_gp0_regnum + i] = ev_addr + 4; + ev_addr += REGISTER_RAW_SIZE (tdep->ppc_ev0_regnum); + } + } + } + /* If != 0, fdatap->cr_offset is the offset from the frame that holds the CR. */ if (fdatap->cr_offset != 0) @@ -1801,6 +1984,27 @@ rs6000_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) /* Write into appropriate registers a function return value of type TYPE, given in virtual format. */ +static void +e500_store_return_value (struct type *type, char *valbuf) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); + + /* Everything is returned in GPR3 and up. */ + int copied = 0; + int i = 0; + int len = TYPE_LENGTH (type); + while (copied < len) + { + int regnum = gdbarch_tdep (current_gdbarch)->ppc_gp0_regnum + 3 + i; + int reg_size = REGISTER_RAW_SIZE (regnum); + char *reg_val_buf = alloca (reg_size); + + memcpy (reg_val_buf, valbuf + copied, reg_size); + copied += reg_size; + write_register_gen (regnum, reg_val_buf); + i++; + } +} static void rs6000_store_return_value (struct type *type, char *valbuf) @@ -2553,6 +2757,9 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_pc_regnum (gdbarch, 64); set_gdbarch_sp_regnum (gdbarch, 1); set_gdbarch_fp_regnum (gdbarch, 1); + set_gdbarch_deprecated_extract_return_value (gdbarch, + rs6000_extract_return_value); + set_gdbarch_store_return_value (gdbarch, rs6000_store_return_value); if (v->arch == bfd_arch_powerpc) switch (v->mach) @@ -2586,6 +2793,8 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_dwarf2_reg_to_regnum (gdbarch, e500_dwarf2_reg_to_regnum); set_gdbarch_pseudo_register_read (gdbarch, e500_pseudo_register_read); set_gdbarch_pseudo_register_write (gdbarch, e500_pseudo_register_write); + set_gdbarch_extract_return_value (gdbarch, e500_extract_return_value); + set_gdbarch_store_return_value (gdbarch, e500_store_return_value); break; default: tdep->ppc_vr0_regnum = -1; @@ -2667,9 +2876,6 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_register_convert_to_virtual (gdbarch, rs6000_register_convert_to_virtual); set_gdbarch_register_convert_to_raw (gdbarch, rs6000_register_convert_to_raw); set_gdbarch_stab_reg_to_regnum (gdbarch, rs6000_stab_reg_to_regnum); - - set_gdbarch_deprecated_extract_return_value (gdbarch, rs6000_extract_return_value); - /* Note: kevinb/2002-04-12: I'm not convinced that rs6000_push_arguments() is correct for the SysV ABI when the wordsize is 8, but I'm also fairly certain that ppc_sysv_abi_push_arguments() will give even @@ -2683,7 +2889,6 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_push_arguments (gdbarch, rs6000_push_arguments); set_gdbarch_store_struct_return (gdbarch, rs6000_store_struct_return); - set_gdbarch_store_return_value (gdbarch, rs6000_store_return_value); set_gdbarch_deprecated_extract_struct_value_address (gdbarch, rs6000_extract_struct_value_address); set_gdbarch_pop_frame (gdbarch, rs6000_pop_frame); -- 2.30.2