From 03131d99d39823574e8c0369f43a4eed4e885ca8 Mon Sep 17 00:00:00 2001 From: Corinna Vinschen Date: Wed, 6 Oct 2004 08:56:40 +0000 Subject: [PATCH] * sh-tdep.c (IS_MACL_STS): New define. (IS_MOVI20): Ditto. (IS_MACL_LDS): Ditto. (sh_analyze_prologue): Recognize STS.L MACL,@-r15 and MOVI20 instructions in prologue. (sh_in_function_epilogue_p): Recognize LDS.L @r15+,MACL and MOVI20 instructions in epilogue. --- gdb/ChangeLog | 10 ++++++++++ gdb/sh-tdep.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 58 insertions(+), 1 deletion(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 4d789f67163..e94e4ae1b12 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,13 @@ +2004-10-06 Corinna Vinschen + + * sh-tdep.c (IS_MACL_STS): New define. + (IS_MOVI20): Ditto. + (IS_MACL_LDS): Ditto. + (sh_analyze_prologue): Recognize STS.L MACL,@-r15 and MOVI20 + instructions in prologue. + (sh_in_function_epilogue_p): Recognize LDS.L @r15+,MACL and MOVI20 + instructions in epilogue. + 2004-10-06 Corinna Vinschen * sh-tdep.c (SH_NUM_REGS): Define as 67. diff --git a/gdb/sh-tdep.c b/gdb/sh-tdep.c index e9834102231..80a6be9fc87 100644 --- a/gdb/sh-tdep.c +++ b/gdb/sh-tdep.c @@ -411,6 +411,10 @@ sh_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) r15-4-->r15, PR-->(r15) */ #define IS_STS(x) ((x) == 0x4f22) +/* STS.L MACL,@-r15 0100111100010010 + r15-4-->r15, MACL-->(r15) */ +#define IS_MACL_STS(x) ((x) == 0x4f12) + /* MOV.L Rm,@-r15 00101111mmmm0110 r15-4-->r15, Rm-->(R15) */ #define IS_PUSH(x) (((x) & 0xff0f) == 0x2f06) @@ -458,6 +462,8 @@ sh_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) #define IS_MOVW_PCREL_TO_REG(x) (((x) & 0xf000) == 0x9000) /* MOV.L @(disp*4,PC),Rn 1101nnnndddddddd */ #define IS_MOVL_PCREL_TO_REG(x) (((x) & 0xf000) == 0xd000) +/* MOVI20 #imm20,Rn 0000nnnniiii0000 */ +#define IS_MOVI20(x) (((x) & 0xf00f) == 0x0000) /* SUB Rn,R15 00111111nnnn1000 */ #define IS_SUB_REG_FROM_SP(x) (((x) & 0xff0f) == 0x3f08) @@ -467,6 +473,7 @@ sh_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) #define IS_RESTORE_FP(x) ((x) == 0x6ef6) #define IS_RTS(x) ((x) == 0x000b) #define IS_LDS(x) ((x) == 0x4f26) +#define IS_MACL_LDS(x) ((x) == 0x4f16) #define IS_MOV_FP_SP(x) ((x) == 0x6fe3) #define IS_ADD_REG_TO_FP(x) (((x) & 0xff0f) == 0x3e0c) #define IS_ADD_IMM_FP(x) (((x) & 0xff00) == 0x7e00) @@ -508,6 +515,11 @@ sh_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc, cache->saved_regs[PR_REGNUM] = cache->sp_offset; cache->sp_offset += 4; } + else if (IS_MACL_STS (inst)) + { + cache->saved_regs[MACL_REGNUM] = cache->sp_offset; + cache->sp_offset += 4; + } else if (IS_MOV_R3 (inst)) { r3_val = ((inst & 0xff) ^ 0x80) - 0x80; @@ -553,6 +565,25 @@ sh_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc, } } } + else if (IS_MOVI20 (inst)) + { + if (sav_reg < 0) + { + reg = GET_TARGET_REG (inst); + if (reg < 14) + { + sav_reg = reg; + sav_offset = GET_SOURCE_REG (inst) << 16; + /* MOVI20 is a 32 bit instruction! */ + pc += 2; + sav_offset |= read_memory_unsigned_integer (pc, 2); + /* Now sav_offset contains an unsigned 20 bit value. + It must still get sign extended. */ + if (sav_offset & 0x00080000) + sav_offset |= 0xfff00000; + } + } + } else if (IS_SUB_REG_FROM_SP (inst)) { reg = GET_SOURCE_REG (inst); @@ -2389,8 +2420,16 @@ sh_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) else if (!IS_RESTORE_FP (read_memory_unsigned_integer (addr + 2, 2))) return 0; - /* Step over possible lds.l @r15+,pr. */ inst = read_memory_unsigned_integer (addr - 2, 2); + + /* Step over possible lds.l @r15+,macl. */ + if (IS_MACL_LDS (inst)) + { + addr -= 2; + inst = read_memory_unsigned_integer (addr - 2, 2); + } + + /* Step over possible lds.l @r15+,pr. */ if (IS_LDS (inst)) { addr -= 2; @@ -2413,6 +2452,14 @@ sh_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) inst = read_memory_unsigned_integer (addr - 2, 2); } + /* On SH2a check if the previous instruction was perhaps a MOVI20. + That's allowed for the epilogue. */ + if ((gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_sh2a + || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_sh2a_nofpu) + && addr > func_addr + 6 + && IS_MOVI20 (read_memory_unsigned_integer (addr - 4, 2))) + addr -= 4; + if (pc >= addr) return 1; } -- 2.30.2