Abstract the handling of dirty stacked registers in ia64_read_reg() and
ia64_write_reg() and call these whenever we read or write registers from and to memory. This way we correctly read registers from addresses in the register cache and thus fixes backtraces when the saved registers (such as rp and ar.pfs) are in dirty stacked registers.
This commit is contained in:
Marcel Moolenaar
parent
10aeefc913
commit
78cf5f2fcd
@ -639,6 +639,48 @@ rse_address_add(CORE_ADDR addr, int nslots)
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return new_addr;
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}
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static void
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ia64_read_reg (CORE_ADDR addr, void *buf, int len)
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{
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ULONGEST bspstore;
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regcache_cooked_read_unsigned (current_regcache, IA64_BSPSTORE_REGNUM,
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&bspstore);
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if (addr >= bspstore)
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{
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ULONGEST bsp;
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regcache_cooked_read_unsigned (current_regcache, IA64_BSP_REGNUM,
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&bsp);
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if (addr < bsp)
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{
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target_read_partial (¤t_target, TARGET_OBJECT_DIRTY,
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(void*)&bspstore, buf, addr - bspstore, len);
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return;
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}
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}
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read_memory (addr, buf, len);
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}
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static void
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ia64_write_reg (CORE_ADDR addr, void *buf, int len)
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{
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ULONGEST bspstore;
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regcache_cooked_read_unsigned (current_regcache, IA64_BSPSTORE_REGNUM,
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&bspstore);
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if (addr >= bspstore)
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{
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ULONGEST bsp;
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regcache_cooked_read_unsigned (current_regcache, IA64_BSP_REGNUM,
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&bsp);
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if (addr < bsp)
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{
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target_write_partial (¤t_target, TARGET_OBJECT_DIRTY,
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(void*)&bspstore, buf, addr - bspstore, len);
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return;
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}
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}
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write_memory (addr, buf, len);
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}
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static void
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ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
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int regnum, void *buf)
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@ -655,20 +697,10 @@ ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
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subtract the size of frame from it to get start of register frame. */
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bsp = rse_address_add (bsp, -(cfm & 0x7f));
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if ((cfm & 0x7f) > regnum - V32_REGNUM)
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if ((cfm & 0x7f) > regnum - V32_REGNUM)
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{
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ULONGEST bspstore;
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ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
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regcache_cooked_read_unsigned (regcache, IA64_BSPSTORE_REGNUM,
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&bspstore);
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if (reg_addr < bspstore) {
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reg = read_memory_integer ((CORE_ADDR)reg_addr, 8);
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store_unsigned_integer (buf, register_size (current_gdbarch,
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regnum), reg);
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} else
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target_read_partial (¤t_target, TARGET_OBJECT_DIRTY,
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(void*)&bspstore, buf, reg_addr - bspstore,
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register_size (current_gdbarch, regnum));
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ULONGEST addr = rse_address_add (bsp, (regnum - V32_REGNUM));
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ia64_read_reg (addr, buf, register_size (current_gdbarch, regnum));
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}
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else
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store_unsigned_integer (buf, register_size (current_gdbarch, regnum), 0);
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@ -710,19 +742,9 @@ ia64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
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regcache_cooked_read_unsigned (regcache, IA64_RNAT_REGNUM, &nat_collection);
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else
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{
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ULONGEST bspstore;
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regcache_cooked_read_unsigned (regcache, IA64_BSPSTORE_REGNUM,
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&bspstore);
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if (nat_addr < bspstore)
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nat_collection = read_memory_integer (nat_addr, 8);
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else {
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char natbuf[8];
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target_read_partial (¤t_target, TARGET_OBJECT_DIRTY,
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(void*)&bspstore, natbuf,
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nat_addr - bspstore,
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register_size (current_gdbarch, regnum));
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nat_collection = *((uint64_t*)natbuf);
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}
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uint64_t tmp;
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ia64_read_reg (nat_addr, &tmp, sizeof(tmp));
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nat_collection = tmp;
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}
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nat_bit = (gr_addr >> 3) & 0x3f;
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natN_val = (nat_collection >> nat_bit) & 1;
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@ -787,16 +809,8 @@ ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
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if ((cfm & 0x7f) > regnum - V32_REGNUM)
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{
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ULONGEST bspstore;
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ULONGEST reg_addr = rse_address_add (bsp, (regnum - V32_REGNUM));
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regcache_cooked_read_unsigned (regcache, IA64_BSPSTORE_REGNUM,
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&bspstore);
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if (reg_addr < bspstore)
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write_memory (reg_addr, (void *)buf, 8);
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else
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target_write_partial (¤t_target, TARGET_OBJECT_DIRTY,
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(void*)&bspstore, buf, reg_addr - bspstore,
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register_size (current_gdbarch, regnum));
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ULONGEST addr = rse_address_add (bsp, (regnum - V32_REGNUM));
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ia64_write_reg (addr, (void *)buf, 8);
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}
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}
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else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM)
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@ -850,34 +864,15 @@ ia64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
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}
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else
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{
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char nat_buf[8];
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ULONGEST bspstore;
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regcache_cooked_read_unsigned (regcache, IA64_BSPSTORE_REGNUM,
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&bspstore);
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if (nat_addr < bspstore)
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nat_collection = read_memory_integer (nat_addr, 8);
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else {
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char natbuf[8];
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target_read_partial (¤t_target, TARGET_OBJECT_DIRTY,
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(void*)&bspstore, natbuf,
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nat_addr - bspstore,
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register_size (current_gdbarch, regnum));
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nat_collection = *((uint64_t*)natbuf);
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}
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uint64_t tmp;
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ia64_read_reg (nat_addr, &tmp, sizeof(tmp));
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nat_collection = tmp;
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if (natN_val)
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nat_collection |= natN_mask;
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else
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nat_collection &= ~natN_mask;
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store_unsigned_integer (nat_buf, register_size (current_gdbarch,
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regnum),
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nat_collection);
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if (nat_addr < bspstore)
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write_memory (nat_addr, nat_buf, 8);
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else
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target_write_partial (¤t_target, TARGET_OBJECT_DIRTY,
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(void*)&bspstore, nat_buf,
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nat_addr - bspstore,
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register_size (current_gdbarch, regnum));
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tmp = nat_collection;
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ia64_write_reg (nat_addr, &tmp, sizeof(tmp));
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}
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}
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}
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@ -1451,7 +1446,9 @@ examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *next_frame,
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cfm = 0;
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if (cache->saved_regs[IA64_CFM_REGNUM] != 0)
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{
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cfm = read_memory_integer (cache->saved_regs[IA64_CFM_REGNUM], 8);
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uint64_t tmp;
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ia64_read_reg (cache->saved_regs[IA64_CFM_REGNUM], &tmp, sizeof(tmp));
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cfm = tmp;
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}
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else if (cfm_reg != 0)
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{
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@ -1649,7 +1646,7 @@ ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, valuep, register_size (current_gdbarch, regnum));
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ia64_read_reg (addr, valuep, register_size (current_gdbarch, regnum));
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}
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else if (cache->prev_cfm)
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store_unsigned_integer (valuep, register_size (current_gdbarch, regnum), cache->prev_cfm);
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@ -1734,7 +1731,11 @@ ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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nat_collection = extract_unsigned_integer (buf, 8);
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}
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else
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nat_collection = read_memory_integer (nat_addr, 8);
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{
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uint64_t tmp;
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ia64_read_reg (nat_addr, &tmp, sizeof(tmp));
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nat_collection = tmp;
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}
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nat_bit = (gr_addr >> 3) & 0x3f;
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natval = (nat_collection >> nat_bit) & 1;
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}
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@ -1750,7 +1751,7 @@ ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, buf, register_size (current_gdbarch, IA64_IP_REGNUM));
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ia64_read_reg (addr, buf, register_size (current_gdbarch, IA64_IP_REGNUM));
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pc = extract_unsigned_integer (buf, 8);
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}
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else if (cache->frameless)
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@ -1779,7 +1780,7 @@ ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, buf, register_size (current_gdbarch, IA64_IP_REGNUM));
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ia64_read_reg (addr, buf, register_size (current_gdbarch, IA64_IP_REGNUM));
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pc = extract_unsigned_integer (buf, 8);
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}
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else if (cache->frameless)
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@ -1801,7 +1802,7 @@ ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, buf, register_size (current_gdbarch, IA64_BR0_REGNUM));
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ia64_read_reg (addr, buf, register_size (current_gdbarch, IA64_BR0_REGNUM));
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br0 = extract_unsigned_integer (buf, 8);
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}
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store_unsigned_integer (valuep, 8, br0);
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@ -1817,7 +1818,7 @@ ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, valuep, register_size (current_gdbarch, regnum));
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ia64_read_reg (addr, valuep, register_size (current_gdbarch, regnum));
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}
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else if (cache->frameless)
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{
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@ -1828,7 +1829,6 @@ ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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CORE_ADDR r_addr;
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CORE_ADDR prev_cfm, prev_bsp, prev_bof;
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CORE_ADDR addr = 0;
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ULONGEST bspstore;
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if (regnum >= V32_REGNUM)
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regnum = IA64_GR32_REGNUM + (regnum - V32_REGNUM);
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@ -1841,24 +1841,9 @@ ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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prev_bof = rse_address_add (prev_bsp, -(prev_cfm & 0x7f));
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addr = rse_address_add (prev_bof, (regnum - IA64_GR32_REGNUM));
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/* Figure out if the register was already flushed or is dirty.
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If the register was flushed already we can return the address
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on the backingstore for it. */
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regcache_cooked_read_unsigned (current_regcache, IA64_BSPSTORE_REGNUM,
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&bspstore);
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if (addr < bspstore)
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, valuep, register_size (current_gdbarch, regnum));
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}
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else
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{
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target_read_partial (¤t_target, TARGET_OBJECT_DIRTY,
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(void*)&bspstore, valuep, addr - bspstore,
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register_size (current_gdbarch, regnum));
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}
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*lvalp = lval_memory;
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*addrp = addr;
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ia64_read_reg (addr, valuep, register_size (current_gdbarch, regnum));
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}
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}
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else
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@ -1882,7 +1867,7 @@ ia64_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, valuep, register_size (current_gdbarch, regnum));
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ia64_read_reg (addr, valuep, register_size (current_gdbarch, regnum));
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}
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/* Otherwise, punt and get the current value of the register. */
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else
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@ -2037,7 +2022,7 @@ ia64_sigtramp_frame_prev_register (struct frame_info *next_frame,
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, buf, register_size (current_gdbarch, IA64_IP_REGNUM));
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ia64_read_reg (addr, buf, register_size (current_gdbarch, IA64_IP_REGNUM));
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pc = extract_unsigned_integer (buf, 8);
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}
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pc &= ~0xf;
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@ -2054,7 +2039,7 @@ ia64_sigtramp_frame_prev_register (struct frame_info *next_frame,
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, valuep, register_size (current_gdbarch, regnum));
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ia64_read_reg (addr, valuep, register_size (current_gdbarch, regnum));
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}
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}
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else
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@ -2065,7 +2050,7 @@ ia64_sigtramp_frame_prev_register (struct frame_info *next_frame,
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{
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*lvalp = lval_memory;
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*addrp = addr;
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read_memory (addr, valuep, register_size (current_gdbarch, regnum));
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ia64_read_reg (addr, valuep, register_size (current_gdbarch, regnum));
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}
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}
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