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| author | Richard Henderson <rth@twiddle.net> | 2013-08-27 10:22:54 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-09-02 09:08:30 -0700 |
| commit | 0f842f8a246f2b5b51a11c13f933bf7a90ae8e96 (patch) | |
| tree | 2dd695c689fb49d15fe28f2792fde11dba5be55e /include/exec/softmmu_template.h | |
| parent | c72b26ec92eb93a92852ab1d23acb5a945de5062 (diff) | |
| download | qemu-0f842f8a246f2b5b51a11c13f933bf7a90ae8e96.tar.gz | |
exec: Reorganize the GETRA/GETPC macros
Always define GETRA; use __builtin_extract_return_addr, rather than
having a special case for s390. Split GETPC_ADJ out of GETPC; use 2
universally, rather than having a special case for arm.
Rename GETPC_LDST to GETRA_LDST to indicate that it does not
contain the GETPC_ADJ value. Likewise with GETPC_EXT to GETRA_EXT.
Perform the GETPC_ADJ adjustment inside helper_ret_ld/st. This will
allow backends to pass along the "true" return address rather than
the massaged GETPC value. In the meantime, double application of
GETPC_ADJ does not hurt, since the call insn in all ISAs is at least
4 bytes long.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'include/exec/softmmu_template.h')
| -rw-r--r-- | include/exec/softmmu_template.h | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/include/exec/softmmu_template.h b/include/exec/softmmu_template.h index eaca9e1035..2fc6ea3235 100644 --- a/include/exec/softmmu_template.h +++ b/include/exec/softmmu_template.h @@ -86,6 +86,9 @@ glue(glue(helper_ret_ld, SUFFIX), MMUSUFFIX)(CPUArchState *env, target_ulong tlb_addr = env->tlb_table[mmu_idx][index].ADDR_READ; uintptr_t haddr; + /* Adjust the given return address. */ + retaddr -= GETPC_ADJ; + /* If the TLB entry is for a different page, reload and try again. */ if ((addr & TARGET_PAGE_MASK) != (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { @@ -121,10 +124,12 @@ glue(glue(helper_ret_ld, SUFFIX), MMUSUFFIX)(CPUArchState *env, #endif addr1 = addr & ~(DATA_SIZE - 1); addr2 = addr1 + DATA_SIZE; - res1 = glue(glue(helper_ret_ld, SUFFIX), MMUSUFFIX)(env, addr1, - mmu_idx, retaddr); - res2 = glue(glue(helper_ret_ld, SUFFIX), MMUSUFFIX)(env, addr2, - mmu_idx, retaddr); + /* Note the adjustment at the beginning of the function. + Undo that for the recursion. */ + res1 = glue(glue(helper_ret_ld, SUFFIX), MMUSUFFIX) + (env, addr1, mmu_idx, retaddr + GETPC_ADJ); + res2 = glue(glue(helper_ret_ld, SUFFIX), MMUSUFFIX) + (env, addr2, mmu_idx, retaddr + GETPC_ADJ); shift = (addr & (DATA_SIZE - 1)) * 8; #ifdef TARGET_WORDS_BIGENDIAN res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift)); @@ -150,7 +155,7 @@ glue(glue(helper_ld, SUFFIX), MMUSUFFIX)(CPUArchState *env, target_ulong addr, int mmu_idx) { return glue(glue(helper_ret_ld, SUFFIX), MMUSUFFIX)(env, addr, mmu_idx, - GETPC_EXT()); + GETRA_EXT()); } #ifndef SOFTMMU_CODE_ACCESS @@ -182,6 +187,9 @@ glue(glue(helper_ret_st, SUFFIX), MMUSUFFIX)(CPUArchState *env, target_ulong tlb_addr = env->tlb_table[mmu_idx][index].addr_write; uintptr_t haddr; + /* Adjust the given return address. */ + retaddr -= GETPC_ADJ; + /* If the TLB entry is for a different page, reload and try again. */ if ((addr & TARGET_PAGE_MASK) != (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { @@ -223,8 +231,10 @@ glue(glue(helper_ret_st, SUFFIX), MMUSUFFIX)(CPUArchState *env, #else uint8_t val8 = val >> (i * 8); #endif + /* Note the adjustment at the beginning of the function. + Undo that for the recursion. */ glue(helper_ret_stb, MMUSUFFIX)(env, addr + i, val8, - mmu_idx, retaddr); + mmu_idx, retaddr + GETPC_ADJ); } return; } @@ -245,7 +255,7 @@ glue(glue(helper_st, SUFFIX), MMUSUFFIX)(CPUArchState *env, target_ulong addr, DATA_TYPE val, int mmu_idx) { glue(glue(helper_ret_st, SUFFIX), MMUSUFFIX)(env, addr, val, mmu_idx, - GETPC_EXT()); + GETRA_EXT()); } #endif /* !defined(SOFTMMU_CODE_ACCESS) */ |