From 70b439f0a87b6c42901e49a71b1dbd09300e8260 Mon Sep 17 00:00:00 2001 From: Yao Qi Date: Mon, 12 Oct 2015 11:28:38 +0100 Subject: [PATCH] Move target_read_uint32 out of aarch64_relocate_instruction This patch is to move target_read_uint32 out of aarch64_relocate_instruction and pass INSN to aarch64_relocate_instruction, so that it is cleaner, only decode instructions. gdb/gdbserver: 2015-10-12 Yao Qi * linux-aarch64-low.c (aarch64_relocate_instruction): Add argument insn. Remove local variable insn. Don't call target_read_uint32. (aarch64_install_fast_tracepoint_jump_pad): Call target_read_uint32. --- gdb/gdbserver/ChangeLog | 8 ++++++++ gdb/gdbserver/linux-aarch64-low.c | 13 ++++++------- 2 files changed, 14 insertions(+), 7 deletions(-) diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog index b6318941f26..5d60f549ba4 100644 --- a/gdb/gdbserver/ChangeLog +++ b/gdb/gdbserver/ChangeLog @@ -1,3 +1,11 @@ +2015-10-12 Yao Qi + + * linux-aarch64-low.c (aarch64_relocate_instruction): Add + argument insn. Remove local variable insn. Don't call + target_read_uint32. + (aarch64_install_fast_tracepoint_jump_pad): Call + target_read_uint32. + 2015-09-30 Yao Qi * linux-aarch64-low.c (emit_movk): Shorten a long line. diff --git a/gdb/gdbserver/linux-aarch64-low.c b/gdb/gdbserver/linux-aarch64-low.c index 5592e619bbd..909ba657e18 100644 --- a/gdb/gdbserver/linux-aarch64-low.c +++ b/gdb/gdbserver/linux-aarch64-low.c @@ -1924,8 +1924,8 @@ can_encode_int32 (int32_t val, unsigned bits) return rest == 0 || rest == -1; } -/* Relocate an instruction from OLDLOC to *TO. This function will also - increment TO by the number of bytes the new instruction(s) take(s). +/* Relocate an instruction INSN from OLDLOC to *TO. This function will + also increment TO by the number of bytes the new instruction(s) take(s). PC relative instructions need to be handled specifically: @@ -1937,11 +1937,10 @@ can_encode_int32 (int32_t val, unsigned bits) - LDR/LDRSW (literal) */ static void -aarch64_relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc) +aarch64_relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc, uint32_t insn) { uint32_t buf[32]; uint32_t *p = buf; - uint32_t insn; int is_bl; int is64; @@ -1956,8 +1955,6 @@ aarch64_relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc) unsigned bit; int32_t offset; - target_read_uint32 (oldloc, &insn); - if (aarch64_decode_b (oldloc, insn, &is_bl, &offset)) { offset = (oldloc - *to + offset); @@ -2120,6 +2117,7 @@ aarch64_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, uint32_t *p = buf; int32_t offset; int i; + uint32_t insn; CORE_ADDR buildaddr = *jump_entry; /* We need to save the current state on the stack both to restore it @@ -2422,7 +2420,8 @@ aarch64_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, /* Now emit the relocated instruction. */ *adjusted_insn_addr = buildaddr; - aarch64_relocate_instruction (&buildaddr, tpaddr); + target_read_uint32 (tpaddr, &insn); + aarch64_relocate_instruction (&buildaddr, tpaddr, insn); *adjusted_insn_addr_end = buildaddr; /* We may not have been able to relocate the instruction. */ -- 2.30.2